minuszerodegrees.net
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Personal Computer Hardware Reference Library
Technical
Reference
Revised Edition (March 1986)
The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to you.
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This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. IBM may make improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time.
It is possible that this publication may contain reference to, or information about, IBM products (machines and programs), programming, or services that are not announced in your country. Such references or information must not be construed to mean that IBM intends to announce such IBM products, programming, or services in your country.
Products are not stocked at the address below. Requests for copies of this publication and for technical information about IBM Personal Computer products should be made to your authorized IBM Personal Computer dealer, IBM Product Center, or your IBM Marketing Representative.
The following paragraph applies only to the United States and Puerto Rico: A Reader's Comment Form is provided at the back of this publication. If the form has been removed, address comments to: IBM Corporation, Personal Computer, P.O. Box 1328-C, Boca Raton, Florida 33429-1328. IBM may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligations whatever.
© Copyright International Business Machines Corporation 1981, 1986
Federal Communications Commission Radio Frequency Interference Statement
1""""'\
Warning: The equipment described herein has been certified to comply with the limits for a Class B computing device, pursuant to Subpart J of Part 15 of the FCC rules. Only peripherals (computer input/output devices, terminals, printers, etc.) certified to comply with the Class B limits may be attached to the computer. Operation with non-certified peripherals is likely to result in interference to radio and TV reception. If peripherals not offered by IBM are used with the equipment, it is suggested to use shielded grounded cables with in-line filters if necessary.
CAUTION This product described herein is equipped with a grounded plug for the user's safety. It is to be used in conjunction with a properly grounded receptacle to avoid electrical shock.
iii
Notes:
iv
Preface
This publication describes the various components of the IBM Personal Computer XT and IBM Portable Personal Computer; and the interaction of each.
The information in this publication is for reference, and is intended for hardware and program designers, programmers, engineers, and anyone else with a knowledge of electronics and/or programming who needs to understand the design and operation of the IBM Personal Computer XT or IBM Portable Personal Computer.
This publication consists of two parts: a system manual and an options and adapters manual.
The system manual is divided into the following sections:
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Section 1, "System Board", discusses the component layout,
circuitry, and function of the system board.
Section 2, "Coprocessor", describes the Intel 8087 coprocessor and provides programming and hardware interface information.
Section 3, "Power Supply", provides electrical input/output specifications as well as theory of operation for both the IBM Personal Computer XT power supply and the IBM Portable Personal Computer power supply.
Section 4, "Keyboard", discusses the hardware makeup, function, and layouts of the IBM Personal Computer XT 83-keyand 1Ol/102-key keyboards and the IBM Portable Personal Computer keyboard. In addition, keyboard encod ing and usage is discussed.
Section 5, "System Bios", describes the basic input/output system and its use. This section also contains the software
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interrupt listing, a BIOS memory map, descriptions of vec tors with special meanings, and a set of low memory maps.
Section 6, "Instruction Set", provides a quick reference for the 8088 and 8087 assembly instruction set.
Section 7, "Characters, Keystrokes, and Colors", supplies the decimal and hexadecimal values for characters and text attributes.
A glossary, bibliography, and index are also provided.
The Technical Reference Options and Adapters manual provides information, logic diagrams, and specifications pertaining to the options and adapters available for the IBM Personal Computer family of products. The manual is modular in format, with each module providing information about a specific option or adapter. Modules having a large amount of text contain individual indexes. The modules are grouped by type of device into the following categories:
· Expansion Unit · Displays
· Printers · Storage Devices · Memory Expansion
· Adapters
· Miscellaneous · Cables and Connectors.
Full-length hard-tab pages with the above category descriptions, separate the groups of modules.
The term "Technical Reference manual" in the Options and Adapters manual, refers to the:
· IBM Personal Computer XT/IBM Portable Personal
Computer Technical Reference manual
· IBM Personal Computer Technical Reference manual · IBM Personal Computer AT Technical Reference manual.
The term "Guide to Operations manual" in the Options and Adapters manual, refers to the:
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· IBM Personal Computer Guide to Operations manual · IBM Personal Computer XT Guide to Operations manual · IBM Portable Personal Computer Guide to Operations manual · IBM Personal Computer AT Guide to Operations manual. Prerequisite Publications · IBM Personal Computer XT Guide to Operations · IBM Portable Personal Computer Guide to Operations. Suggested Reading · BASIC for the IBM Personal Computer · Disk Operating System (DOS) · Hardware Maintenance Service manual · Hardware Maintenance Reference manual · Macro Assembler for the IBM Personal Computer.
vii
Notes:
viii
Contents
SECTION 1. SYSTEM BOARD ..................... 1-1
Description ................................... 1-3
Microprocessor ................................ 1-4
Data Flow Diagrams ............................ 1-5
System Memory Map ........................... 1-8
System Timers ............................... 1-10
System Interrupts ............................. 1-11
System Boards ............................... 1-12
RAM .................................... 1-12
ROM .................................... 1-13
DMA ...................................... 1-14
I/O Channel ................................. 1-15
System Board Diagram ......................... 1-19
I/O Channel Description ....................... 1-20
I/O Address Map ............................. 1-24
Other Circuits ................................ 1-26
Speaker Circuit ............................ 1-26
8255A I/O Bit Map ........................ 1-27
Specifications ................................ 1-29
System Unit .............................. 1-29
Card Specifications ......................... 1-31
Connectors .................................. 1-32
Logic Diagrams - 64/256K ...................... 1-34
Logic Diagrams - 256/640K ..................... 1-46
SECTION 2. COPROCESSOR ..................... 2-1
Description ................................... 2-3
Programming Interface .......................... 2-4
Hardware Interface ............................. 2-4
SECTION 3. POWER SUPPLIES ................... 3-1
IBM Personal Computer XT Power Supply .......... 3-3
Description ................................ 3-3
Input Requirements ......................... 3-4
Outputs ................................... 3-4
Overvoltage/Overcurrent Protection ............ 3-5
Power Good Signal ........... : .............. 3-5
ix
Connector Specifications and Pin Assignments .... 3-6
IBM Portable Personal Computer Power Supply ...... 3-7
Description ................................ 3-7
Voltage and Current Requirements ............. 3-7
Power Good Signal .......................... 3-8
Connector Specifications and Pin Assignments .... 3-9
SECTION 4. KEYBOARDS ........................ 4-1
Introduction .................................. 4-3
83-Key Keyboard Description .................... 4-3
Block Diagram ............................. 4-5
Keyboard Encoding and Usage ................. 4-6
Extended Codes ............................ 4-9
Keyboard Layouts ......................... 4-12
Connector Specifications .................... 4-19
Keyboard Logic Diagram .................... 4-21
1Ol/102-Key Keyboard ........................ 4-22
Description ............................... 4-22
Power-On Routine ......................... 4-25
Commands from the System .................. 4-26
Commands to the System .................... 4-26
Keyboard Scan Codes ....................... 4-28
Clock and Data Signals ...................... 4-32 ~.
Keyboard Encoding and Usage ................ 4-33
Keyboard Layouts ......................... 4-44
Specifications ............................. 4-51
Logic Diagram ............................ 4-52
SECTION 5. SYSTEM BIOS ....................... 5-1
System BIOS Usage ............................ 5-3
System BIOS Listing - 11/22/85 ................. 5-11
Quick Reference - 256/640K Board ........... 5-11
System BIOS Listing - 11/8/82 ................. 5-111
Quick Reference - 64/256K Board ........... 5-111
SECTION 6. INSTRUCTION SET ................... 6-1
8088 Register Model ........................... 6-3
Operand Summary .......................... 6-4
Second Instruction Byte Summary .............. 6-4
Memory Segmentation Model .................. 6-5 ~ Segment Override Prefix ...................... 6-6
Use of Segment Override ..................... 6-6
8088 Instruction Set ............................ 6-7
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Data Transfer .............................. 6-7
Arithmetic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-10
Logic .................................... 6-13
String Manipulation ........................ 6-15
Control Transfer ........................... 6-16
8088 Instruction Set Matrix ..................... 6-20
8088 Conditional Transfer Operations ............. 6-22
Processor Control ............................. 6-23
8087 Coprocessor Instruction Set ................. 6-24
Data Transfer ............................. 6-24
Comparison .............................. 6-25
Arithmetic ........ . . . . . . . . . . . . . . . . . . . . . . .. 6-26
Transcendent~ ............................ 6-28
Constants ................................ 6-28
Processor Control .......................... 6-29
SECTION 7. CHARACTERS, KEYSTROKES, AND
COLORS ...................................... 7-1
Character Codes ............................... 7-3
Quick Reference .............................. 7-14
Glossary ................................... Glossary-l
Bibliography .............................. Bibliography-l
Index ........................................ Index-l
xi
Notes:
xii
INDEX TAB LISTING
Section 1. System Board ............................... .
Section 2. Coprocessor ................................ .
Section 3. Power Supplies .............................. .
Section 4. Keyboards ................................. .
Section 5. System BIOS ............................... .
Section 6. Instruction Set .............................. .
xiii
Notes:
xiv
Section 7. Characters, Keystrokes, and Colors .............. .
Glossary ........................................... .
Bibliography ........................................ .
Index .............................................. .
xv
Notes:
xvi
System Block Diagram (XT)
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The following is a system block diagram of the IBM Personal Computer XT.
SYSTEM UNIT
System Board
8088
Oscillator
8 Interrupt Levels
Speaker Adapter
4 Channels
Keyboard
Direct Memory Adapter
Access
Memory
Read-Only
Memory
Math
Coprocessor
(Optional)
Power Supply 130 Watt 4 Level Speaker
Keyboard
Extender Card
to
Receiver Card
(See Expansion
8 Unit Block
7
Diagram)
6
5
4
3
2
8-Slot
I/O Channel
Note: A "System to Adapter Compatibility Chart," to identify the adapters supported by each system, and an "Option to Adapter Compatibility Chart," to identify the options supported by each adapter, can be found in the front matter of the Technical Reference Options and Adapters manual, Volume 1.
xvii
System Block Diagram (Portable)
The following is a system block diagram of the IBM Portable Personal Computer.
SYSTEM UNIT
Composite CRT
System Board
8088
Oscillator
Power Supply
114 Watt
4 Level
8 Interrupt Levels
Speaker Adapter
4 Channels
Keyboard
Direct Memory Adapter
Access
Speaker
I
I Keyboard
Memory
Read-Only
Memory
Math
Coprocessor
(Optional)
r-
r--
8
7 6
5 4
3
2
~Diskette Adapter
4
Extender Card to Receiver Card*
* ~Color/Graphics Adapter
See the Expansion Unit Block Diagram
Note: A "System to Adapter Compatibility Chart," to identify the adapters supported by each system, and an "Option to Adapter Compatibility Chart," to identify the options supported by each adapter, can be found in the front matter of the Technical Reference Options and Adapters manual, Volume 1.
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xviii
Expansion Unit Block Diagram
The following is an expansion unit block diagram for the IBM Portable Personal Computer and IBM Personal Computer XT ~ with the 64/256K system board.
EXPANSION UNIT
Power Supply r--130 Watt 4 Level
Expansion Board Osc i llator
~
r-
Receiver Card from
Extender Card
r----
-
8-Slot
Expanded
I/O Channel
8
'-
r
i-
7
-
6
-
5
I--
'-
4
'-
3
'-
-2 1 -
Note: A "System to Adapter Compatibility Chart," to identify the adapters supported by each system, and an "Option to Adapter Compatibility Chart," to identify the options supported by each adapter, can be found in the front matter of the Technical Reference Options and Adapters manual, Volume 1.
xix
Notes:
xx
SECTION 1. SYSTEM BOARD
Description ................................... 1-3
Microprocessor ................................ 1-4
Data Flow Diagrams ............................ 1-5
System Memory Map ........................... 1-8
System Timers ............................... 1-10
System Interrupts ............................. 1-11
System Boards ............................... 1-12
RAM .................................... 1-12
64/256K System Board .................. 1-12
256/640K System Board ................. 1-13
ROM .................................... 1-13
DMA ...................................... 1-14
I/O Channel ................................. 1-15
System Board Diagram ......................... 1-19
I/O Channel Description ....................... 1-20
I/O Address Map ............................. 1-24
Other Circuits ................................ 1-26
Speaker Circuit ............................ 1-26
8255A I/O Bit Map ........................ 1-27
Specifications ................................ 1-29
System Unit .............................. 1-29
Size .................................. 1-29
Weight ............................... 1-29
Power Cable ........................... 1-29
Environment ........................... 1-29
Heat Output ........................... 1-30
Noise Level ............................ 1-30
Electrical .............................. 1-30
Card Specifications ......................... 1-31
Connectors .................................. 1-32
Logic Diagrams - 64/256K ...................... 1-34
Logic Diagrams - 256/640K ..................... 1-46
System Board 1-1
Notes:
1-2 System Board
Description
The system board fits horizontally in the base of the system unit of the Personal Computer XT and Portable Personal Computer and is approximately 215 mm by 304 mm (8-1/2 x 12 in.). It is a mUltilayer, single-Iand-per-channel design with ground and internal planes provided. DC power and a signal from the power supply enter the board through two 6-pin connectors. Other connectors on the board are for attaching the keyboard and speaker. Eight 62-pin card-edge sockets are also mounted on the board. The I/O channel is bussed across these eight I/O slots. Slot J8 is slightly different from the others in that any card placed in it is expected to respond with a 'card selected' signal whenever the card is selected.
A dual in-line package (DIP) switch (one 8-switch pack) is mounted on the board and can be read under program control. The DIP switch provides the system programs with information about the installed options, how much storage the system board has, what type of display adapter is installed, whether or not the coprocessor is installed, what operational modes are desired when power is switched on (color or black-and-white, 80- or 40-character lines), and the number of diskette drives attached.
The system board contains the adapter circuits for attaching the serial interface from the keyboard. These circuits generate an interrupt to the microprocessor when a complete scan code is received. The interface can request execution of a diagnostic test in the keyboard.
The system board consists of five functional areas: the processor subsystem and its support elements, the ROM subsystem, the read/write (R/W) memory subsystem, integrated I/O adapters, and the I/O channel. All are described in this section.
System Board 1-3
Microprocessor
The heart of the system board is the Intel 8088 Microprocessor. This is an 8-bit external-bus version of Intel's 16-bit 8086 Microprocessor, and is software-compatible with the 8086. Thus, the 8088 supports 16-bit operations, including mUltiply and divide, and 20 bits of addressing OM byte of storage). It also operates in maximum mode, so a coprocessor can be added as a feature. The microprocessor operates at 4.77MHz. This frequency is derived from a 14.31818MHz crystal, the frequency of which is divided by 3 for the microprocessor clock, and divided by 4 to obtain the 3.58MHz color-burst signal required for color televisions. At the 4.77MHz clock rate, the 8088 bus cycles are four clocks of 210 nanoseconds (ns) each, or 840ns total. Some I/O cycles take five 210ns clocks or 1.05 microseconds (f.Ls).
1-4 System Board
Data Flow Diagrams
The system board data flow diagram starts on the next page.
System Board 1-5
XAO
blind
c:::=::::::> c:z:::::::O:: Control Bus 20-Bit AddreSl Bus
lI±fff±£1±fij> a·Bit Data Bus
1-6 System Board
GND --5V
t==============j iX1iIOOWR
f~-- ============~ YXMMEEMMWR
System Board 1-7
System Memory Map
Start Address
DeCimalf Hex
OK
00000
16K
04000
32K
08000
48K
OCOOO
64K
10000
80K
14000
86K
18000
112K
1COOO
128K
20000
144K
24000
160K
28000
176K
2COOO
192K
30000
208K
34000
224K
38000
240K
3COOO
256K
40000
272K
44000
288K
48000
304K
4COOO
Function
64/256K
256/640K
128-256K Read/Wr i te Memory on the System Board
256-640K Read/Write Memory on the System Board
320K
50000
336K
54000
352K
58000
368K
5COOO
384K
60000 384K R/W
400K
64000 Memory
416K
68000 Expansion
432K
6COOO in the
I/O Channel
448K
70000
464K
74000
480K
78000
496K
7COOO
512K
80000
528K
84000
544K
88000
560K
8COOO
576K
90000
592K
94000
608K
98000
624K
9COOO
System Memory Map (Part 1 of 2)
1-8 System Board
Start Address
I Decimal Hex
640K
656K 672K 688K
AOOOO
A4000 A8000 ACOOO
Function 64/256K & 256/640K
128K Reserved
704K
736K
752K
768K
784K
800K
816K
832K
848K 864K 880K 896K 912K 928K 944K
960K 976K 992K 1008K
BOOOO
B8000
BCOOO
COOOO
C6000
C8000
CCOOO
DOOOO
D4000 D8000 DCOOO EOOOO E4000 E8000 ECOOO
FOOOO F4000 F8000 FCOOO
Monochrome Color/Graphics
Enhanced Graphics Professional Graphics Fixed Disk Control PC Network Cluster 192K Read Only Memory Expansion and Control
64K Base system BIOS and BASIC ROM
System Memory Map (Part 2 of 2)
System Board 1-9
System Timers
Three programmable timer/counters are used by the system as
follows: Channel 0 is used as a general-purpose timer providing a
constant time base for implementing a time-of-day clock.
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Channel 0
System Timer
GATE 0 CLKIN 0 CLKOUTO
Tied on 1.193182 MHz OSC 8259A IRQ 0
Channel 1 is used to time and request refresh cycles from the DMA channel.
Channell
Refresh Request Generator
GATE 1 CLKIN 1 CLKOUT 1
Tied on 1.193182 MHz OSC Request refresh cycle
Note: Channel 1 is programmed as a rate generator to
produce a 15-microsecond period signal.
Channel 2 is used to support the tone generation for the audio speaker. Each channel has a minimum timing resolution of 1.05JLs.
Channel 2
Tone Generation for Speaker
GATE 2 CLKIN 2 CLK OUT 2
Controlled by bit 0 of port hex 61, PPI bit 1.193182 MHz OSC Used to drive the speaker
The 8254-2 Timer/Counter is a programmable interval timer/ counter that system programs treat as an arrangement of four external I/O ports. Three ports are treated as counters; the fourth is a control register for mode programming. The following is a system-timer block diagram.
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1-10 System Board
-Refresh
8253-5 System Bus --+
Gate 0
+5 Vdc
I
L-
D Q Clock Clear
Refresh Request
+5 Vdc
r-- Clock In 0 Gate I
I--
I/O Add ress
- Hex 006 I
I--
- Port Bi t 0
Clock In I Gate 2
Clock In 2
Clock Out 0
I I Clock Out I I-- Driver
8259A IRQ 0
I/O Add ress Hex 006 1 Port Bi t I
PC LK (2 .38MHz)
Clock Out 2
I Divide
by 2
I AND I
Low r---+ To Speaker
Pass Fi Iter
System-Timer Block Diagram
System Interrupts
Of the eight prioritized levels of interrupt, six are bussed to the system expansion slots for use by feature cards. Two levels are used on the system board. Level 0, the higher priority, is attached to Channel 0 of the timer/counter and provides a periodic interrupt for the time-of-day clock. Levell is attached to the keyboard adapter circuits and receives an interrupt for each scan code sent by the keyboard.
The non-maskable interrupt (NMI) of the 8088 is used to report memory parity errors.
System Board 1-11
The following diagram contains the System Interrupt Listing.
Number
Usage
NMI
Parity
8087
a
Timer
1
Keyboard
,2
EGA Display, PC Net, 3278/79
3
Asynchronous Communications (Alternate)
PC Net(Alternate)
3278/79(Alternate)
SDLC Communications
BSC Communications
Cluster (Primary)
4
Asynchronous Communications (Primary)
SDLC Communications
BSC Communications
Voice Communications Adapter ~
5
Fixed Disk
6
Diskette
7
Printer
Cluster (Alternate)
* Jumper selectable to 2, 3, 4, 7.
8088 Hardware Interrupt listing
System Boards
There are two types of system boards, 64/256K and 256/640K.
RAM
64/256K System Board
The 64/256K system board has either 128K or 256K of R/W memory. Memory greater than the system board's maximum of 256K is obtained by adding memory cards in the expansion slots. The memory consists of dynamic 64K by 1 bit chips with an access time of 200ns and a cycle time of 345ns. All R/W memory is parity-checked.
1-12 System Board
256/640K System Board
The 256/640K system board has either 256K, 512K or 640K of R/W memory. The memory consists of dynamic 64K by 1 bit chips in Banks 2 and 3 and dynamic 256K by 1 bit chips in Banks
oand 1 with an access time of 200ns and a cycle time of 345ns.
All R/W memory is parity-checked.
System Board Minimum Maximum Memory Pluggable Pluggable Storage Storage Modules (Banks 0-1) (Banks 2-3)
64/256K
64K
256K 64K by 2 Banks
2 Banks
1 bit of 9
of 9
256/640K
256K
640K
256K by 2 Banks
1 bit
of 9
and 64K
by 1 bit
2 Banks of 9
ROM
The system board supports both read only memory (ROM) and R/W memory. It has space for 64K by 8 of ROM or erasable programmable read-only memory (EPROM). Two module sockets are provided, each of which can accept a 32K or 8K device. On the 64/256K system board, one socket has 32K by 8 bits of ROM, the other 8K by 8 bits. On the 256/640K system board, both sockets have 32K by 8 bits of ROM installed. This ROM contains the power-on self test, I/O drivers, dot patterns for 128 characters in graphics mode, and a diskette bootstrap loader. The ROM is packaged in 28-pin modules and has an access time and a cycle time of 250ns each.
System Board 1-13
DMA
The microprocessor is supported by a set of high-function support devices providing four channels of 20-bit direct-memory access (DMA), three 16-bit timer/counter channels, and eight prioritized interrupt levels.
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Three of the four DMA channels are available on the I/O bus and support high-speed data transfers between I/O devices and memory without microprocessor intervention. The fourth DMA channel is programmed to refresh the system's dynamic memory. This is done by programming a channel of the timer/counter device to periodically request a dummy DMA transfer. This action creates a memory-read cycle, which is available to refresh dynamic memory both on the system board and in the system expansion slots. DMA data transfers take five clock cycles of 210ns, or 1.05JLs. (See I/O CH RDY on page 1-22.) Refresh cycles occur once every 72 clocks (approximately 15JLs) and require four clocks or approximately 5.6% of the bus bandwidth.
The following formula determines the percentage of bandwidth used for refresh.
64K X 1
% Bandwidth used 4 cycles X 128 512
for Refresh = --------------
5.6%
1.93ms/210ns 9190
256K X 1
% Bandwidth used 4 cycles X 256 1024
for Refresh = --------------
5.6%
3.86ms/210ns 19048
1-14 System Board
I/O Channel
The I/O channel is an extension of the 8088 microprocessor bus. It is, however, demultiplexed, repowered, and enhanced by the addition of interrupts and direct memory access (DMA) functions.
The I/O channel contains an 8-bit, bidirectional data bus, 20 address lines, 6 levels of interrupt, control lines for memory and I/O read or write, clock and timing lines, 3 channels of DMA control lines, memory refresh-timing control lines, a 'channel check' line, and power and ground for the adapters. Four voltage levels are provided for I/O cards: +5 Vdc ± 5%, -5 Vdc ± 10%, + 12 Vdc ± 5%, and -12 Vdc ± 10%. These functions are provided in a 62-pin connector with 100-mil card tab spacing.
An 'I/O channel ready' line (I/O CH RDY) is available on the I/O channel to allow operation with slow I/O or memory devices. These devices can pull I/O CH RDY low to add wait states to the following operations:
~ · Normal memory read and write cycles take four 210ns clocks for a cycle time of 840ns/byte.
· Microprocessor-generated 1/0 read and write cycles require
five clocks for a cycle time of 1.05/Ls/byte.
· DMA transfers require five clocks for a cycle time of 1.05/Ls/byte.
I/O devices are addressed using I/O mapped address space. The channel is designed so that 768 I/O device addresses are available to the I/O channel cards.
A 'channel check' line exists for reporting error conditions to the microprocessor. Activating this line results in a non-maskable interrupt (NMI) to the 8088 microprocessor. Memory expansion ~ options use this line to report parity errors.
The I/O channel is repowered to provide sufficient drive to power all eight (J1 through J8) expansion slots, assuming two low-power
System Board 1-15
Schottky (LS) loads per slot. The IBM I/O adapters typically use only one load.
Timing requirements on slot J8 are much stricter than those on slots J 1 through 17. Slot J8 also requires the card to provide a signal designating when the card is selected.
The following figure shows the pin numbering for I/O channel connectors 11 through J8.
Rear Panel
B 1
,,,,,,,,
Al
B10
A10
B20
A20
B31
,,,,,,,,,
A31
Component Side
I/O Channel Pin Numbering (Jl-J8)
1-16 System Board
The following figures show signals and voltages for the I/O channel connectors.
I/O Pin
Signal Name
I/O
A1
-I/O CH CK
I
A2
S07
I/O
A3
S06
I/O
A4
S05
I/O
A5
S04
I/O
A6
S03
I/O
A7
S02
I/O
A8
SOl
I/O
A9
SOO
I/O
AIO
I/O CH ROY
I
All
AEN
0
A12
SAl9
I/O
A13
SAl8
/0
A14
SA 17
/0
Al5
SA16
/0
Al6
SA15
/0
A17
SA14
/0
A18
SA 13
/0
A19
SAl2
/0
A20
SA 11
/0
A21
SA10
/0
A22
SA9
/0
A23
SA8
/0
A24
SA7
/0
A25
SA6
I/O
A26
SA5
I/O
A27
SA4
I/O
A28
SA3
I/O
A29
SA2
I/O
A30
SAl
I/O
A31
SAO
I/O
I/O Channel (A-Side, J1 through J8)
System Board 1-17
1/0 Pin
B 1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19 B20 B21 B22 B23 B24 B25 B26 B27 B28 B29 B30 B31
Signal Name
GND RESET DRV
+5 Vdc IRQ 2 -5 Vdc DRQ2 -12 Vdc -CARD SlCTD +12 Vdc GND -MEMW -MEMR -lOW -lOR -DACK3 DRQ3 -DACK1 DRQ1 -DACKO ClK IRQ7 IRQ6 IRQ5 IRQ4 IRQ3 -DACK2 TIC ALE +5Vdc OSC GND
1/0
Ground 0
Power I
Power I
Power I
Power Ground
0 0 1/0 1/0 0 I 0 I 1/0 0 I I I I I 0 0 0 Power 0 Ground
I/O Channel (B-Side, J1 through J8)
1-18 System Board
System Board Diagram
The following diagram shows the component layout for the system board. All system board switch settings for total system 1"""""'\ memory, number of diskette drives, and types of display adapters are shown on page 1-27.
Clock Chip!
Color
Trimmer System Expansion Slots
r~-------~--------A
r--------------------,-r-----~"""'i1il1-....... System
o
J1
J2
J3
J4
Board .--...__..,...,.-11 Power
Connections
DODDDDDDDD
System
Configuration
128K to 640K
DIP
:tlaoooooo08~~~~~~
ReadlWrite
Memory with parity Checking
Switches
il_[ODDDDDiloODOOOa
-=- 6» C;].3 -c::J- 0
0
Pinr'\AUdiO
Output
System Board Component Diagram
System Board 1-19
110 Channel Description
The following is a description of the I/O Channel. All lines are TTL-compatible.
AO-A19 (0) Address bits 0 to 19: These lines are used to address memory and I/O devices within the system. The 20 address lines allow access of up to 1M byte of memory. AO is the least significant bit (LSB) and A19 is the most significant bit (MSB). These lines are generated by either the microprocessor or DMA controller. They are active high.
AEN (0) Address Enable: This line is used to de-gate the microprocessor and other devices from the I/O channel to allow DMA transfers to take place. When this line is active (high), the DMA controller has control of the address bus, data bus, Read command lines (memory and I/O), and the Write command lines (memory and I/O).
ALE (0) Address Latch Enable: This line is provided by the 8288 Bus Controller and is used on the system board to latch valid addresses from the microprocessor. It is available to the I/O channel as an indicator of a valid microprocessor address (when used with AEN). Microprocessor addresses are latched with the falling edge of ALE.
1-20 System Board
-CARD SLCTD (I)
-Card Selected: This line is activated by cards in expansion slot 18. It signals the system board that the card has been selected and that appropriate drivers on the system board should be directed to either read from, or write to, expansion slot 18. Connectors 11 through 18 are tied together at this pin, but the system board does not use their signal. This line should be driven by an open collector device.
CLK (0)
System clock: It is a divide-by-3 of the oscillator and has a period of 210ns (4.77MHz). The clock has a 33% duty cycle.
DO-D71/0
Data Bits 0 to 7: These lines provide data bus bits 0 to 7 for the microprocessor, memory, and I/O devices. DO is the LSB and D7 is the MSB. These lines are active high.
-DACKOto-DACK3(O)
-DMA Acknowledge 0 to 3: These lines are used to acknowledge DMA requests (DRQI-DRQ3) and refresh system dynamic memory (-DACKO). They are active low.
DRQI-DRQ3 (I)
DMA Request 1 to 3: These lines are asynchronous channel requests used by peripheral devices to gain DMA service. They are prioritized with DRQ3 being the lowest and DRQl being the highest. A request is generated by bringing a DRQ line to an active level (high). A DRQ line must be held high until the ~ corresponding DACK line goes active.
System Board 1-21
-I/O CH CK (I)
-I/O Channel Check: This line provides the microprocessor with parity (error) information on memory or devices in the I/O channel. When this signal is active low, a parity error is indicated.
I/O CH RDY (I)
I/O Channel Ready: This line, normally high (ready), is pulled low (not ready) by a memory or I/O device to lengthen I/O or memory cycles. It allows slower devices to attach to the I/O channel with a minimum of difficulty. Any slow device using this line should drive it low immediately upon detecting a valid address and a Read or Write command. This line should never be held low longer than 10 clock cycles. Machine cycles (I/O or memory) are extended by an integral number of clock cycles (2IOns).
-lOR (0)
-I/O Read Command: This command line instructs an I/O
r-'\
device to drive its data onto the data bus. It may be driven by the
microprocessor or the DMA controller. This signal is active low.
-lOW (0)
-I/O Write Command: This command line instructs an I/O device to read the data on the data bus. It may be driven by the microprocessor or the DMA controller. This signal is active low.
IRQ2-IRQ7 (I)
Interrupt Request 2 to 7: These lines are used to signal the microprocessor that an I/O device requires attention. They are prioritized with IRQ2 as the highest priority and IRQ7 as the lowest. An interrupt request is generated by raising an IRQ line (low to high) and holding it high until it is acknowledged by the microprocessor (interrupt service routine).
~
1-22 System Board
-MEMR(O)
-Memory Read: This command line instructs the memory to drive its data onto the data bus. It may be driven by the microprocessor or the DMA controller. This signal is active low.
-MEMW (0) -Memory Write: This command line instructs the memory to store the data present on the data bus. It may be driven by the microprocessor or the DMA controller. This signal is active low.
OSC (0) Oscillator: High-speed clock with a 70ns period (14.31818MHz). It has a 50% duty cycle.
RESET DRV (0) ~ Reset Drive: This line is used to reset or initialize system logic
upon power-up or during a low line-voltage outage. This signal is synchronized to the falling edge of eLK and is active high.
TIC (0) Terminal Count: This line provides a pulse when the terminal count for any DMA channel is reached. This signal is active high.
System Board 1-23
I/O Address Map
The following pages contain the planar and channel I/O Address Maps.
·Hex Range*
Device
OOO-OlF 020-03F 040-05F 060-06F 080-09F OAX**
DMA cont ro II er , 8237A-5
Interrupt controller, 8259A
Timer, 8253-5
PPI 8255A-5
DMA page registers
NMI Mask Registers
Note: I/O Addresses, hex 000 to OFF, are reserved for the
system board I/O. Hex 100 to 3FF are avai lable
on the I/O channe I .
~... These are the addresses decoded by the current set of adapter cards. IBM may use any of the unlisted
.... addresses for future use. At power-on-time, the Non Mask Interrupt into the 8088 is
masked off. This mask bit can be set and reset through
system software as fo I lows :
Set mask: Write hex 80 to I/O Address hex AO(enable NMI)
Clear mask: Write hex 00 to I/O Address hex AO(disable NMI)
Planar I/O Address Map
1-24 System Board
Hex Range'\
Device
200-20F
201 20C-20D
210-217 21F
278-27F 2BO-2DF
2El 2E2 & 2E3 2F8-2FF
300-31F 320-32F 348-357 360-367 368-36F
378-37F 380-38FH ,\
390-393 3AO-3AF
3BO-3BF 3CO-3CF 3DO-3DF 3FO-3F7 3F8-3FF 6E2 & 6E3
790-793 AE2 & AE3
B90-B93 EE2 & EE3
1390-1393 22El
2390-2393 42El 62El 82El A2El C2El E2El
Game Control Game I/O
Reserved
Expansion Unit Reserved
Parallel printer port 2 Alternate Enhanced Graphics Adapter
GPIB (Adapter 0) Data Acquisition (Adapter 0)
Serial port 2 Prototype card Fixed Disk
DCA 3278 PC Network (low address) PC Network (high address)
Parallel printer port 1
SDLC, bisynchronous 2 Cluster
Bisynchronous 1 Monochrome Display and Printer Adapter Enhanced Graphics Adapter Color/Graphics Monitor Adapter Diskette controller Serial port 1
Data Acquisition (Adapter 1) CIus ter (Adapter 1) Data Acquisition (Adapter 2)
Cluster (Adapter 2)
Data Acquisition (Adapter 3) Cluster (Adapter 3)
GP IB (Adapter 1)
Cluster (Adapter 4)
GPIB (Adapter 2)
GPIB (Adapter 3)
GPIB (Adapter 4)
GPIB (Adapter 5)
GPIB (Adapter 6)
GPIB (Adapter 7)
Note: I/O Addresses, hex 000 to OFF, are reserved for the system board I/O. Hex 100 to 3FF are available on the I/O channel.
* These are the addresses decoded by the current set of adapter cards. IBM may use any of the unlisted addresses for future use.
SDLC Communication and Secondary Binary Synchronous Communications cannot be used together because their hex addresses overlap.
~ Channel I/O Address Map
System Board 1-25
Other Circuits
Speaker Circuit
The system unit has a 57.15 mm (2-1/4 in.) audio speaker. The speaker's control circuits and driver are on the system board. The speaker connects through a 2-wire interface that attaches to a 3-pin connector on the system board.
The speaker drive circuit is capable of approximately 1/2 watt of power. The control circuits allow the speaker to be driven three different ways: 1.) a direct program control register bit may be toggled to generate a pulse train; 2.) the output from Channel 2 of the timer/counter may be programmed to generate a waveform to the speaker; 3.) the clock input to the timer/counter can be modulated with a program-controlled I/O register bit. All three methods may be performed simultaneously.
PPI Bit 1, I/O Address Hex 0061~ ,--
1.19 MHz
NAND
Clock
~ In 2
Low
Timer Clock Out 2 ~ ~ Gate 2
t- Driver r- Pass -+To
Fi Iter Speaker
'--
PPI Bit 0, I/O Address Hex 0061
Speaker Drive System Block Diagram
Channel 2 (Tone generation for speaker)
Gate 2
-- Control led by 8255A-5 PPI Bit (See 8255 Map)
Clock In 2 -- 1.19318 MHz OSC
Clock Out 2 -- Used to drive speaker
Speaker Tone Generation
1-26 System Board
The speaker connection is a 4-pin Berg connector.
Pin
Function
P3
1
2
3 4
Data out
Key
Ground +5 Vdc
Speaker Connector (P3)
8255A I/O Bit Map
The 8255A I/O Bit Map shows the inputs and outputs for the Command/Mode register on the system board. Also shown are the switch settings for the memory, display, and number of diskette drives. The following page contains the I/O bit map.
System Board 1-27
--
-
Hex
PAO + Keyboard Scan Code 0
Diagnostic Outputs 0
Port I 1
1
1
Number N 2
2
2
P 3
3 Or
3
0060 U 4
4
4
T 5
5
5
6
6
6
7
-7 -
-7
PBO + Timer 2 Gate Speaker
0 1 + Speaker Data
U 2 Spare
T 3 Read High Switches or Read Low Switches
0061 P 4 - Enable RAM Parity Check
U 5 - Enable I/O Channel Check
T 6 7
PCO I 1
swill ['p I,y 0 - Hold Keyboard Clock Low
- (Enable Keyboard or + (Clear Keyboard)
Loop on POST + CoProcessor Installed Sw-2
Display 1
Sw-5 Sw-6
N 2 + Planar RAM Size 0
" Sw-3 Or # Drives
" Sw-7
0062 P 3 + Planar RAM Size I U 4 Spare
* Sw-4 # Drives 1
~ Sw-8
T 5 + Timer Channel 2 Out
UJJ + I/O Channel Check + RAM Parity Check
0063
Command/Mode Register
Hex 99
Mode Register Value
76 5 432 1a
100 1 10a 1
* Sw-4 Sw-3
0
0
0
1
1
a
1
1
4 Amount of Memor on System Board - 64/256K
6 K
128K
192K
256K
* Sw-4 Sw-3
0
0
0
1
1
0
1
1
Amount of Memory on System Board - 256/640K
256K
512K
576K
640K
** Sw-6 Sw-5
0
0
0
1
1
a
1
1
Display at Power-Up Mode
Reserved
Color 40 X 25 (BW Mode)
Color 80 X 25 (BW Mode)
IBM Monochrome 80 X 25
*** Sw-8 Sw-7
0
0
0
1
1
0
1
1
Number of Diskette Drives in System
1
2
3
4
Notes:
PA Bit = 0 implies switch "ON". PA Bit = 1 implies switch "OFF".
A plus (+) indicates a bit value of 1 performs the specified function.
A minus (-) indicates a bit value of 0 performs the specified function.
8255A I/O Bit Map
1-28 System Board
SpecificatiODS
System Unit
Size
· Length: 498 millimeters (19.6 inches) · Depth: 411 millimeters (16.2 inches) · Height: 147 millimeters (5.8 inches)
Weight
· 14.2 kilograms (31.6 pounds)
Power Cable
· Length: 1.8 meters (6 feet)
Environment
· Air Temperature System On: 15.6 to 32.2 degrees C (60 to 90 degrees F) System Off: 10 to 43 degrees C (50 to 110 degrees F)
· Wet Bulb Temperature - System On: 22.8 degrees C (73 degrees F) - System Off: 26.7 degrees C (80 degrees F)
System Board 1-29
· Humidity System On: 8% to 80% System Off: 20% to 80%
· Altitude - Maximum altitude: 2133.6 meters (7000 feet)
Heat Output
· 1229 British Thermal Units (BTU) per hour
Noise Level
· 43 decibels average-noise rating (without printer)
Electrical
· Power: 450 VA · Input
Nominal: 115 Vac
Minimum: 100 Vac
Maximum: 125 Vac
1-30 System Board
)
I
~ loco Hole ~002 (3.175 ± .05)
)
)
Front View (Component Side) 12.8 (325.12)
1 18 )
....,
~
(D
[J).
; 1 loco Hole
0.125 ± .002 (3 175 ± .05)
,----------------
>0
(D
-I(I--------,r
nn-...........
.~ ~ ....
Mounting Holes
.. .. 0.125 ± .005 (3.175 ±
/ I
(~~p~;~:nadd) ~===~r:~:; l~;~.
.. '" ~~ loco Holes
0.125 + - .002 (3.175 ±.0!)1
w
a;
en 0
w
~
0
..
:0:s
'" [.J..)...,
0 0
'"'" '"I
-co
0 >0
O~·
::s
, ---.ll~
n
~
'"I
J 0:(10-1-S--:tr---1_-.L t 0..
[.J..)...,
0.705 (17.907)
e..
3.190 ± .005 (81 .02S ± .127)
0
~
==.~.
-n'..~ .=J....1..,
= n
~
§
r.I)
~
~
rD
9
Notes:
== 1. All Card Dimensions
are ± ,010 (.254) Tolerance
~ (With Exceptions Indicated on Drawing or -in Notes).
--,Vol
13.13 ± .020 (333.502 ± .508)
2 Max. Card length is 13.15 (334.01) Smatler Length is Permissible.
3, Loc. and Mounting Holes are Non-Plated Thru. (loc. 3X. Mtg. 2X).
4. 31 Gold Tabs Each Side. 0.100 ± .0005 (2.54 ± .0127) Center to Center. O.OS ± .0005 (1.524 ± .0127)
Width.
5. Numbers in Parentheses are in Millimeters. All Others
are in Inches.
l NOIl:J3S
Connectors
The system board has the following additional connectors:
· Two power-supply connectors (PI and P2)
· Speaker connector (119)
· Keyboard connector (122)
The pin assignments for the power-supply connectors, PI and P2, are as follows. The pins are numbered 1 through 6 from the rear of the system.
Connector Pin Assignments
1
Power Good
2
Key
P 1
3
+12 Vdc
4
-12 Vdc
5
Ground
6
Ground
1
Ground
2
Ground
P2
3
-5 Vdc
4
+5 Vdc
5
+5 Vdc
6
+5 Vdc
Power Supply Connectors (Pl, P2)
1-32 System Board
The speaker connector, 119, is a 4-pin, keyed, Berg strip. The pins are numbered 1 through 4 from the front of the system. The pin assignments are as follows:
Connector Pin
Function
1
Data out
J19
2
Key
3
Ground
4
+5 Vdc
Speaker Connector (J19)
The keyboard connector, 122, is a 5-pin, 90-degree printed circuit board (PCB) mounting, DIN connector. For pin numbering, see the "Keyboard" section. The pin assignments are as follows:
Connector Pin
Assignments
1
Keyboard Clock
J22
2
Keyboard Data
3
Reserved
4
Ground
5
+5 Vdc
Keyboard Connector (J22)
System Board 1-33
Logic Diagrams - 64/256K
The following pages contain the logic diagrams for the 64/256K system board.
1-34 System Board
55 00
:6:6 ;;,:6.ri
in
§§ §~~
"",,§a,;(JIaal~~
",,,,",,,-boooo
ee~:~~~a ~
- ,.
i:;;
-........
...o.....
Q)
.=Q.)
5a
'E
cIooU
f---
E
.Q...)
e>n
CI)
c~o
In N
c~o
<orn~~~~~;:M;n;nin
~~~~2~9~§~,~~
:t:tr:trr
'!?'!?'!?'!?"2'!?
1111111
r;;.n.nii).n.nii).n
~~~~~~~~
System Board 1-35
-I
W 0\
~l;=a
)
(SH.1Q,11)
I/OCHRDY
(SH.5)
(SH, 5)
(SH.4)
(SH.S)
r-------------------~;_-------------------------4~--------------+XHEMR
(SH.6)
)~6
YHEMR'
, - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - RQY'/WAlT
(SH.3) (SH. 1)
RDYTOOMA. (SH.4)
(SH.3)
(SH 1) (SH.l) (SH.l) (SH, 4)
(SH.1) (SH.S)
[)f1A,(S'
LOCK'
Si'
5(ji HRQONA
RESET
eLK
(SH.1) (SH 9) (SH.S) (SH. 5)
(SH.3)
H.P.""I N.P.{N$TLSW
ptKl XD7
WRTNMtREG'
(SH.l0,11) llOCHCK
1 I
(SH.9)
E~BLe:I/O(K'
u. .
(SH.1)
LSO"
CLK8E
~)2
ue.
'LK'
~ (SH.4,5)
AENBRD
A'E"W
OHAWAIT'
(SH.l,5) (SH,1,3)
(SH.l)
HOLDA
(SH.4)
RESETDRY' (SH.9,lO) RESETDRV (SH.1O,ll)
NHI
(SH.1)
I/O CHCK ISH.9) DeLI( (SH 4)
64/256K System Board (Sheet 2 of 11)
)
)
~
~
~
9
-l== I
VJ -.J
ISH. 5) ISH. 5)
-
---+I
ISH. 5) ISH,5)
(SH.5) (SH.4)
x~~:.
we
OACK 0
iSH. 2) (SH.ll
YM..E,.M,..R,
,"1,I,,
+'>v
)
)
Y I')
~~ : (LsnB
:"
a
y~
, " I I U4'> Y~ \3 ~ ~~pt
I ~
---..J
n ~LS32 I I
US8
Q 10
~~;2
8
=DHA(S'
~ wRTNHIREG'
ISH 2)
WRTOMAPGREG' ISH.4)
~~-------------------------------------------------------------RAMAOORSEL' (SH.5)
,
7:~ U4"
I') A7;;;
YOb I"
:
J
---------- ---
",14,~":O...:,~
""
IZiO,>
ADDRSEL CASO' CASI' (AS2' CASV
RASO'
RASi'
(SH.6) (SH.6) (SH.5) ISH.7) ISH 7)
(SH.6)
ISH 6)
RASZ' RAS-~'
(SH 7) (SH 7)
- - - ((S5C1' } - - - (52' - - - CS1' - - - CS't'
- - - (5')'
- - - (S&'
cW
ROMADDRSEL
ISH.S) ($H.5)
ISH 5)
,
+')y ~ ~V 8________________....
64/256K System Board (Sheet 3 of 11)
l NOll~HS
1-38 System Board
~.~
;;~~~§~~~;;;;;~~;;;;
~~~~~ri~~~~ddddriririririri
~~iiii~iiiii~iii~~i~
~~~~~~~~~~eee~~ee~~~
~~~
~~~
>:)1;
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:ii:i:i:i:i:i:i ~~eee~~~
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Q)
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f
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ph
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15 I~ ~~~~~~~
IIIIIIII '1'~"2!1!1!1<,2 ~
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Od§
~
~~;:-~~N;::<i
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go~:;~\!;g~
Ii ~ I~ I~ I~ III~
- ~ - - ~ "@@~
System Board 1-39
;:-;:-;:-~~~;:-~ Ii> C;;-C;;-
". '"
!1C{?
~~~~~~~~~ ~~~~RR~~
~W
~§.~~@~@@@ ~~§§§§~~
~~
I~~~iiii~~ ~i~ii§~~ ~~
1111111
111111
............
..0
(C)
Q)
.Qc)
~
"'C ~ ctI 0
aI
..E
Q)
II)
>
t/) ~
(C) "-....,,
1.0
--N
o:t
(C)
I
~~S3'~ ~ ~
~
(§"';;-"'$.Ji
· !1C{?C{?':2'!!'!!
§
I~I~
c;;-c;; !2!2
I.: "
~§
II
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1-40 System Board
......o......
I..'.
Q)
Q)
.r::.
(/)
"'.C..
roa
a:I
.EQ..)
I>II
(/)
:::.=: <.0
L!)
N
~
<.0
System Board 1-41
-I
.j::.
N
00
'.(<.I.l.
to
9 (SH.4) (SH.9)
=
0
(SH.9)
~
... (SH.5)
Q. (SH.S)
(SH.3)
(SH.S)
(SH.5)
(SH.5)
(SH.5)
(SH.5)
(SH.5)
(SH.5)
(SH.5)
(SH.5)
(SH.5)
DACKOBRD'~
SPKRDATA
TlM2GATESPK
XIOR XIO'W T/((S XAO <AI '00 XDI XD2 XD; XOLt XDC; XDb X07
74lS'32
+SV
GATEOOUTO 10
+SV
~~~I DUll n
~~20UT2 11
CLK2 00 WR CS AD AI DO 01 azc;'3-C;
02 U2&
D~
04 oS
I 06
+SV 21t ~~C
12 GND
+>V
~.
(REFRESH REC DMA)
7')417
06 CS~ l1
ORQO
(SH.4)
IRQO SPK
(SH.l) (SH.9)
11(2001 (SH.9)
(SH.2) (SH.1)
RESETDRV' PCLK
)
4C Q2 Q ~
S 0 Q7 Q 6
120
Q 10
n DlS~1i~ :~
CLR Q 14
I q
64/256K System Board (Sheet 8 of 11 )
)
)
~
~
'!l'!l
~ ~
IiI,g n H "'0:'
..........
o e..n...
Q) Q) ~
~
't..:.l
octI
IX)
E .Q...).
~~::~f::~~~II~-£,~~,---+H~+U~--.-------4 ~~~~======~-it e!>nII
F~"'~~"~~+~-------4~-~I~ ",il":;:J",
c:::.o=::
It)
f 1.~1
--N
coo:t
",;;:;M",",~",",",",ii;ii;iiiii;
~~~~~§§~~~~~~~
~ ~s '--------
System Board 1-43
.....
1
+::0 +::0
00 '<
~
e ~
=.0Q..;
Q.
(SH.l)
DO
(SH.t)
01
(SH.t)
02
(SH.t)
0'
(SH.t)
D.
(SH 1)
0'
(SH 1)
Db
(SH 1)
D7
(SH.t) (SH.t) (SH.l) (SH.l) (SH.l)
...AO
AI A2
.,
(SH.t)
(SH.l) (SH.l)
(SH.t) (SH.l)
..A.
A7 A8
(SH.t)
Ala
(SH.1)
All
(SH.1)
AI2
(SH.1)
m
(SH.1)
AI.
(SH.l)
AI'
(SH.l)
AI.
(SH.l)
AI7
(SH.l)
AI8
(SH.l)
(SH.1) (SH.l)
AI'
lOW
TW
(SH.l) "'EMR'
(SH.l)
HEI1W'
(SH.5) (SH.l) (SH.4)
(SH.5) (SH.2) (SH.S) (SH.4)
ClK
OSC
"NTIC
RESETDRY
0i.'CK0'
l5ACiIT'
(SH.4) (SH.4)
DACK2' DACI('¥
(SH.l)
ALE
)
~ I!OCHRDY
RESERVED
IRQ2 IRQ,
IRQ4 IAQ') IAQb IAQ7 ORQI
ORQ2 ORQ,
(SH. 2) (SH.2)
(SH.l)
(SH.l)
(SH.l)
(SH.l)
(SH.l)
(SH.l) (SH.4) (SH.4) (SH.4)
AOI
AiO
B08
BO,
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."
:~~ ~~~
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(SH.1)
I I -~ ----1.,. -;====+==~~=====::::;===:;:===========
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I
PI 0 POWER GOOD
~ ~f2VV DC
If 00 -G1N2DV DC
o GND
JOUF
.0'+7 PF
I
I/O CONNECTOR
FROM BOARD
TOP SIDE:
AOI
COMPONENT SIDE OF I/O CARDS FACES
I P2 GNO
2 ~ GNO
~ g ~~~oc
i g :~~g~
PW'R CONN
>3,
TYP JI THRU J8 (8 CONNECTORS TOTAL)
64/256K System Board (Sheet 10 of 11)
)
)
ISH.5) ISH. 5) ISH. 5) ISH. 5) ISH. 5) ISH. 5) ISH. 5) ISH. 5) ISH. 5) ISH. 5) ISH. 5)
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A2b A2';
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ISH. 5) YMEMW'
ISH.5)
CLK
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ISH. 5)
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ISH.2) RESETDRV
ISH. 5)
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ISH. 4)
DACK I'
A21 A20 AI9
AlB AI7 Alb
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810
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GND
-SV·
+ <;v
64/256K System Board (Sheet 11 of 11)
System Board 1-45
Logic Diagrams - 256/640K
The following pages contain the logic diagrams for the 256/640K system board.
1-46 System Board
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(SH.l) (SH.l) (SH.l) (5H.4)
(SH.l)
(SH.51
Df1ACS'
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RESET
CLK
(SH.l) (SH.9) (SH.6) (5H.5)
(SH.3)
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(SH.l0,11)
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(SH,9) ENABLEI/OCI('
(SH.l)
CLK88
r----------------------------<~-------+XHEHR
(SH.6)
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~
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, - - - - - - - - - - - - - - - - - - - ROV'/WAIT (SH.l1
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(SH.l,S) (5M 1,3)
(SH.l)
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RESETDRV. (SH.l0,11)
"HI
(SH_l)
I I
I/OCH(K (SH.9)
us.
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1
CLK'
USg
256/640K System Board (Sheet 2 of 11 )
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cell (SH.4)
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System Board 1-49
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1-50 System Board
~-.---
System Board 1-51
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1-52 System Board
g
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System Board 1-53
,......
1
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(SH.9) SPKRDATA - - - - -
IS~~;;:IM2GAT;;;;" II
ISH. 31
(SH.5) (SH.5) (SH.5) (SH.5) (SH.S) (SH.S) (SH.S) (SH.5) (SH.5) (SH.5)
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7<;1+77
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IROQ SPI<
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7 '
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256/640K System Board (Sheet 8 of 11)
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-
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o
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CD
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~~~~~~~~~~~~~~
System Board 1-55
~
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((SSHH 11))
6i
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g:02
iSH. 1)
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(SH.1)
06
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07
(SH.1)
A2
(SH.1)
A 1
A27
(SH.1)
_(SH.1)
A A4S-----------.;.,--,;;;;
(SH.1) (SH.1)
" -----.:2ii
A7 ----,;:n
:(~~~~~~::(SH.1)
(SH.1) :SH:,)
A8-----;:;z
A9
-'21
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1
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A01
AiO
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824
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((SSHH, .1l))
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I
(SH.l)
AI7
821
(SH.l)
(SH.l) (SH.l)
AlB
Alq
'i'O"R'
BBiOB.
<S.
2 ('i'>
10 UF
.047 PF
1
(SH.l)
T'O"W'
(SH_l) (SH.l) (SH.l)
MEMR'
I1EM\Ij'
CLK
(SH.S) (SH. 1) (SH 4)
(SH. 5)
OSC TIC
927
_ _,,,
AEN-------s02
~ESETDRY __,,,
IE I "1-- - !~~
+'5V
I I
1
(SH.2) (SH.5) (SH 4) (SH.4)
((SSHH..4l)l
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~ _,,,
OA02'
_
OAC,~ ','
ALE
II 1
I
liD CONNECTOR I'"ROM BOARD TOP SIDE:
----
BOI ;-II1II AOI
,I i
COMPONENT
51 DE OF
.1
110 O,RDS
F~CES
I
i 811 .!...!il A,I
TYP JI THRU J8 (8 CONNECTORS TOTAL)
256/640K System Board (Sheet 10 of 11)
)
)
I/QCHCK' I/O(HRDY RESERVED IAG2 ('3) IRQ1 0) IRQ't 0) IRG,) 0) IRQt> 0) IRQ7 0) oRQI (b) ORQl (t» ORQ1 (t»
(SH 2) (SH.2)
(SH 1) (SH.l) (SH.ll (SH.l) (SH.1) (SH.1) (SH.4) (SH.4) (SH.4)
PwRGOOD (SH.1)
~ d~~ 6~:~~:~DgC~ P\oIR CONN
)
ISH. 5)
XDO
ISH. 5)
XDI
ISH. 5)
XDZ
ISH. 5)
XD~
ISH. 5)
XD4
ISH. 5)
XD~
ISH. 5)
XD6
ISH. 5)
XD7
ISH. 5)
XAO
ISH. 5)
XAI
ISH. 5)
XAZ
ISH. 5)
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ISH. 5)
XA'i
ISH. 5)
XAb
ISH. 5)
XA 7
ISH. 5)
XAB
ISH. 5)
XAG
ISH. 5)
XAIO
ISH. 5) ISH. 5)
XAII XAIZ
(SH. 5)
XAI~
(SH.5)
XAI4
(SH. 5)
XAI~
(SH.5)
XAlb
(SH.5)
XAI7
ISH. 5)
XAI8
(SH.5)
XAlq
ISH. 5)
XIOR'
(SH.5)
XIOW
(SH. 2) YMEMR'
(SH. 5) YMEMW'
(SH.5)
ClK
(SH.1)
OSC
ISH. 4)
TIC
ISH. 5)
AEN
ISH.2)RESETORV
ISH. 5) DACKO'
(SH.4) DAC K I
ISH. 4) DACK Z·
ISH. 4) DAen
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AOq
AOB
A07
A06
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AZB AZ7
AZb
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IRQ"
IRQ'i
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B21
IRQ7
AlB AI7 AI
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818
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JB
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BOq
CONNECTOR B07
DRQZ
DRQ~
+IZV -IZV
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B11 80'>
-w" GND
801 BZq
+ sv
811
B20
8~0
827
All
BOZ
BIG
BI7
B2b
81~
828
ISH. 2) ISH. 2) ISH. 5) ISH. 1) ISH. 1) ISH.1) ISH.1) (SH.1) ISH.1) (SH.4) (SH,4) (SH.4)
256/640K System Board (Sheet 11 of 11)
System Board 1-57
Notes:
1-58 System Board
SECTION 2. COPROCESSOR
Description ................................... 2-3
Programming Interface .......................... 2-4
Hardware Interface ............................. 2-4
Coprocessor 2-1
Notes:
2-2 Coprocessor
Description
The Math Coprocessor (8087) enables the IBM Personal Computer to perform high-speed arithmetic, logarithmic functions, and trigonometric operations with extreme accuracy. The 8087 coprocessor works in parallel with the microprocessor. The parallel operation decreases operating time by allowing the coprocessor to do mathematical calculations while the microprocessor continues to do other functions. The first five bits of every instruction's operation code for the coprocessor are identical (binary 11011). When the microprocessor and the coprocessor see this operation code, the microprocessor calculates the address of any variables in memory, while the coprocessor checks the instruction. The coprocessor takes the memory address from the microprocessor if necessary. To gain access to locations in memory, the coprocessor takes the local bus from the microprocessor when the microprocessor finishes its current instruction. When the coprocessor is finished with the memory transfer, it returns the local bus to the ,~ microprocessor. The IBM Math Coprocessor works with seven numeric data types divided into the three classes listed below. · Binary integers (3 types) · Decimal integers (1 type) · Real numbers (3 types).
Coprocessor 2-3
Programming Interface
The coprocessor extends the data types, registers, and instructions to the microprocessor.
The coprocessor has eight 80-bit registers, which provide the equivalent capacity of the 40 16-bit registers found in the microprocessor. This register space allows constants and temporary results to be held in registers during calculations, thus reducing memory access and improving speed as well as bus availability. The register space can be used as a stack or as a fixed register set. When used as a stack, only the top two stack elements are operated on. The figure below shows representations of large and small numbers in each data type.
Data Type
Significant
Digits
Bits (Decimal) Approximate Range (Decimal)
Word Integer 16
4
-32,768 $ X $ +32,767
Short Integer 32
9
-2x109 $ X $ +2x 109
Long Integer 64
18
-9x10 18 ~ X ~ +9x10 18
Packed Decimal 80
18
-9 .. 99 ~ X ~ +9 .. 99 (18 digits)
Short Real * 32
6-7
8.43x10-37 $ IXI ~ 3.37x1038
Long Real *
64
15-16 4. 19x 10-307 $ IXI $ 1.67x10308
Temporary Real 80
19
3. 4x 10-4932 $ IX I $ 1.2x104932
* The Short Real and Long Real data types correspond to
the single and double precision data types.
Data Types
Hardware Interface
The coprocessor uses the same clock generator and system bus interface components as the microprocessor. The microprocessor's queue status lines (QSO and QS 1) enable the coprocessor to obtain and decode instructions simultaneously with the microprocessor. The coprocessor's 'busy' signal informs the microprocessor that it is executing; the microprocessor's WAIT
"...-..,
2-4 Coprocessor
instruction forces the microprocessor to wait until the coprocessor is finished executing (WAIT FOR NOT BUSY).
When an incorrect instruction is sent to the coprocessor (for example, divide by 0 or load a full register), the coprocessor can signal the microprocessor with an interrupt. There are three conditions that will disable the coprocessor interrupt to the microprocessor:
1. Exception and interrupt-enable bits of the control word are set to 1's
2. System-board switch-block 1, switch 2, set in the On position
3. Non-maskable interrupt register (NMI REG) is set to zero.
At power-on time, the NMI REG is cleared to disable the NMI. Any program using the coprocessor's interrupt capability must ensure that conditions 2 and 3 are never met during the operation of the software or an "Endless WAIT" will occur. An "Endless WAIT" will have the microprocessor waiting for the 'not busy' signal from the coprocessor while the coprocessor is waiting for ~ the microprocessor to interrupt.
Because a memory parity error may also cause an interrupt to the microprocessor NMI line, the program should check the coprocessor status for an exception condition. If a coprocessor exception condition is not found, control should be passed to the normal NMI handler. If an 8087 exception condition is found, the program may clear the exception by executing the FNSAVE or the FNCLEX instruction, and the exception can be identified and acted upon.
The NMI REG and the coprocessor's interrupt are tied to the NMI line through the NMI interrupt logic. Minor modifications to programs designed for use with a coprocessor must be made before the programs will be compatible with the IBM Personal Computer Math Coprocessor.
Coprocessor 2-5
Memory
NMI - - + NMI Micro-
and
NMI INT
Processor I....
System Board
I-
logic INT
,-+ elK
8088
Fami ly
Mu It imaster
.. RQ/GTI QSO QSI TEST
f-- Bus
I -System
Interface
Bus
Components
ll t
8284 Clock Generator
ClK
.... QSO QSl BUSY
.. RQ/GTO
ClK Math
Coprocessor
INT RQ/GTI
Coprocessor Interconnection
Detailed information for the internal functions of the Intel 8087 Coprocessor can be found in the books listed in the Bibliography.
2-6 Coprocessor
SECTION 3. POWER SUPPLIES
IBM Personal Computer XT Power Supply .......... 3-3
Description ................................ 3-3
Input Requirements ......................... 3-4
Outputs ................................... 3-4
Overvoltage/Overcurrent Protection ............ 3-5
Power Good Signal .......................... 3-5
Connector Specifications and Pin Assignments .... 3-6
IBM Portable Personal Computer Power Supply ...... 3-7
Description ................................ 3-7
Voltage and Current Requirements ............. 3-7
Power Good Signal .......................... 3-8
Connector Specifications and Pin Assignments .... 3-9
Power Supplies 3-1
Notes:
3-2 Power Supplies
IBM Personal Computer XT Power Supply
~ Description
The system de power supply is a 130-watt, 4 voltage-level switching regulator. It is integrated into the system unit and supplies power for the system unit, its options, and the keyboard. The supply provides 15 A of +5 Vdc, plus or minus 5%, 4.2 A of + 12 Vdc, plus or minus 5%, 300 rnA of -5 Vdc, plus or minus 10%, and 250 rnA of -12 Vdc, plus or minus 10%. All power levels are regulated with overvoltage and overcurrent protection. There are two power supplies, 120 Vac and 220/240 Vac. Both are fused. If dc overcurrent or overvoltage conditions exist, the supply automatically shuts down until the condition is corrected. The supply is designed for continuous operation at 130 watts.
The system board takes approximately 2 to 4 A of + 5 Vdc, thus allowing approximately 11 A of +5 Vdc for the adapters in the system expansion slots. The + 12 Vdc power level is designed to power the internal diskette drives and the 10M or 20M fixed disk drive. The -5 Vdc level is used for analog circuits in the diskette adapter's phase-lock loop. The + 12 Vdc and -12 Vde are used for powering the Electronic Industries Association (EIA) drivers for the communications adapters. All four power levels are bussed across the eight system expansion slots.
The IBM Monochrome Display has its own power supply, receiving its ac power from the system unit's power system. The ac output for the display is switched on and off with the Power switch and is a nonstandard connector.
Power Supplies 3-3
Input Requirements
The nominal power requirements and output voltages are listed in the following tables.
Voltage @50/60. Hz ± 3 Hz
Nominal Vac Minimum Vac Maximum Vac
110
90
137
220/240
180
259
Current: 4.1 A max at 90 Vac
Input Requirements
Outputs
Nominal Output{Vdc)
+5 Vdc -5 Vdc +12 Vdc -12 Vdc
Vdc Output
Load Current (A)
Min
Max
2.3
15.0
0.0
0.3
0.4
4.2
0.0
0.25
Regulation
Tolerance
+5% to -4% +10% to -8%
+5% to -4%
+10% to -9%
Nominal Output(Vac)
120 220/240 Vac Output
Load Current (A)
Min
Max
0.0 0.0
I
1.0 0.5
Vo Itage Limits
Min
Max
90
137
180
259
The sense levels of the de outputs are:
Output{Vdc) Min imum (Vdc) Sense Voltage Max imum (Vdc)
Nominal (Vdc)
+5 Vdc -5 Vdc +12 Vdc -12 Vdc
+4.5 -4.3 +10.8
-10.2
+5.0 -5.0 +12.0 -12.0
+5.5
-5.5
+13.2
-13.2
Vdc Sense Levels
3-4 Power Supplies
Overvoltage/Overcurrent Protection
Voltage
Type
Nominal (Vac) Protection
Rating
Amps
110 220/240
Fuse Fuse
5.0
3.5
Voltage and Current Protection
Power Good Signal
When the supply is switched off for a minimum of 1.0 second, and then switched on, the 'power good' signal will be regenerated.
The 'power good' signal indicates that there is adequate power to continue processing. If the power goes below the specified levels, the 'power good' signal triggers a system shutdown.
This signal is the logical AND of the dc output-voltage' sense' signal and the ac input-voltage' fail' signal. This signal is ~ TTL-compatible up-level for normal operation or down-level for fault conditions. The ac 'fail' signal causes 'power good' to go to a down level when any output voltage falls below the regulation limits.
The dc output-voltage 'sense' signal holds the 'power good' signal at a down level (during power-on) until all output voltages have reached their respective minimum sense levels. The 'power good' signal has a turn-on delay of at least 100 ms but no greater than 500 ms.
Power Supplies 3-5
Vol
I
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0\
C~..D.
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<'0
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III :::l
Co
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til
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:::l
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1/1
~~
e~~
Diskette Drive Power Connectors
e
Power Connectors
Power On/Off \.
\. System Unit Power Connector
IBM Monochrome Display
Power Connector (Internally Switched)
)
)
Pin 4, +5 Vdc
~ Pin 3, Ground
I[Pin 2, Ground Pin1,+12Vdc
t Pin 4, +5 Vdc Pin 3, Ground
~Pin 2, Ground
Pin 1,+12Vdc 6, +5 Vdc
n 5, Ground 4,-12Vdc 3, +12 Vdc 2, Key
Pin l,PwrGood
~(')...,
~O::r
~
..... ::: (1)
° C§~"O
S (')~ _ (1) _ .... "~'t
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(1)
° CIl ::r (')
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§
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0.. "0 :::
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f"""'t- CJ-Il-l'~
0 .... 0
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~::r::r
"'t (1) (1)
(1)
rJl
rJJ.
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O'CIlO'
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(') CIl
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-:(1::) IV
° . . . (') I
.... "0
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IBM Portable Personal Computer Power Supply
Description
The system unit's power supply is a 114-watt, switching regulator that provides five outputs. It supplies power for the system unit and its options, the power supply fan, the diskette drive, the composite display, and the keyboard. All power levels are protected against overvoltage and overcurrent conditions. The input voltage selector switch has 115 Vac and 230 Vac positions. If a dc overload or overvoltage condition exists, the power supply automatically shuts down until the condition is corrected, and the power supply is switched off and then on.
The internal 5-1/4 inch diskette drive uses the +5 Vdc and the + 12 Vdc power levels. Both the + 12 Vdc and -12 Vdc power levels are used in the drivers and receivers of the optional ~ communications adapters. The display uses a separate + 12 Vdc power level. The +5 Vdc, -5 Vdc, +12 Vdc, and -12 Vdc power levels are bussed across the system expansion slots.
Voltage and Current Requirements
Voltage @50/60 Hz ± 3 Hz
Nominal Vac Minimum Vac Maximum Vac
110
90
137
220/240
180
259
Current: 3.5 A max at 90 Vac
Note: Input voltage to be 50 or 60 hertz, ± 3 hertz.
Power Supplies 3-7
Nominal Output{ Vdc)
+5 Vdc -5 Vdc +12 Vdc -12 Vdc +12 Vdc (display)
Vdc Output
Load Current (A)
Min
Max
2.3 0.0 0.04 0.0
0.5
11.2 0.3 2.9 0.25
1.5
Regulation
Tolerance
+5% to -4% +10% to -8%
+5% to -4%
+10% to -9%
+10% to -9%
Output(Vdc) Minimum (Vdc) Sense Voltage Maximum (Vdc)
Nominal (Vdc)
+5 Vdc -5 Vdc +12 Vdc -12 Vdc
+12 Vdc (display)
+4.5
-4.3 +10.8 -10.2
+10.8
+5.0 -5.0 +12.0
-12.0 +12.0
+6.5
-6.5
+15.6
-15.6
+15.6
Vdc Sense Levels
Vol tage
Type
NominaJ(Vac) Protection
Rating
Amps
110 220/240
Fuse Fuse
5.0
2.5
Voltage and Current Protection
Power Good Signal
When the power supply is switched off for a minimum of 1 second and then switched on, the 'power good' signal is regenerated.
This signal is the logical AND of the dc output-voltage sense signal and the ac input-voltage fail signal. This signal is TIL-compatible up-level for normal operation or down-level for fault conditicns. The ac 'fail' signal causes 'power good' to go to a down-level when any output voltage falls below the sense voltage limits.
When power is switched on, the dc output-voltage sense signal holds the 'power good' signal at a down level until all output
3-8 Power Supplies
voltages reach their minimum sense levels. The 'power good' signal has a turn-on delay of 100 to 500 milliseconds.
Connector Specifications and Pin Assignments
1"""""'\
The power connector on the system board is a 12-pin connector that plugs into the power supply connectors, P8 and P9. The Input Voltage Selector switch and the pin assignment locqtions follow.
Voltage Selector Switch
ON/OFF Switch
Power Supply Fan Connector IBM Display connector)47~==f!IDl Diskette Drive
Powlr Connectors
Power Supply Fan
lf Pin 2, Ground
. Pin 1. -12 Vdc
~. Pin 2, Ground Pinl,+12Vdc
~: Pin 4, +5 Vdc Pin 3, Ground : Pin 2, Ground : Pin I, +12 Vdc
~ PPiinn
4, 3,
+5 Vdc Ground
: Pin 2, Ground
: Pinl,+12Vdc
Pin 6, +5 Vdc Pin 5, +5 Vdc Pin 4, +5 Vdc Pin 3, -5 Vdc Pin 2, Ground
Pin 1. Ground Pin 6, Ground
Pin 5, Ground
Pin 4, -12 Vdc Pin 3, +12 Vdc Pin 2, Key Pin 1. Power Good
Power Supply and Connectors
Power Supplies 3-9
Notes:
3-1 0 Power Supplies
SECTION 4. KEYBOARDS
Introduction .................................. 4-3
83-Key Keyboard Description .................... 4-3
Block Diagram ............................. 4-5
Keyboard Encoding and Usage ................. 4-6
Encoding ..... . . . . . . . . . . . . . . . . . . . . . . . . .. 4-6
Character Codes ......................... 4-6
Extended Codes ............................ 4-9
Extended Functions ...................... 4-9
Shift States ............................. 4-9
Special Handling ........................ 4-11
Extended Functions ..................... 4-12
Keyboard Layouts ......................... 4-12
FrenchKeyboard ....................... 4-13
German Keyboard ...................... 4-14
Italian Keyboard ........................ 4-15
Spanish Keyboard ....................... 4-16
UK Keyboard .......................... 4-17
US Keyboard .......................... 4-18
Connector Specifications .................... 4-19
Keyboard Logic Diagram .................... 4-21
101/102-Key Keyboard ........................ 4-22
Description ............................... 4-22
Cables and Connectors ................... 4-23
Sequencing Key-Code Scanning ............ 4-23
Keyboard Buffer ........................ 4-24
Keys ................................. 4-24
Power-On Routine ......................... 4-25
Power-On Reset ........................ 4-25
Basic Assurance Test .................... 4-25
Commands from the System .................. 4-26
Reset (Hex FF) ........................ 4-26
Commands to the System .................... 4-26
BAT Completion Code (Hex AA) .......... 4-26
BAT Failure Code (Hex FC) .............. 4-26
Key Detection Error (Hex FF) ............. 4-27
Overrun (Hex FF) ...................... 4-27
Keyboard Scan Codes ....................... 4-28
Keyboard 4-1
Scan Code Tables ....................... 4-28
Clock and Data Signals ...................... 4-32
Data Stream ........................... 4-33
Keyboard Data Output ................... 4-33
Keyboard Encoding and Usage ................ 4-33
Character Codes ........................ 4-34
Extended Functions ..................... 4-38 ~ Shift States ............................ 4-40
Speci~Handling ........................ 4-42
Keyboard Layouts ......................... 4-44
FrenchKeyboard ....................... 4-45
German Keyboard ...................... 4-46
Italian Keyboard ........................ 4-47
Spanish Keyboard ....................... 4-48
UK English Keyboard .................... 4-49
US English Keyboard .................... 4-50
Specifications ............................. 4-51
Power Requirements ..................... 4-51
Size .................................. 4-51
Weight ............................... 4-51
Logic Diagram ............................ 4-52
4-2 Keyboard
Introduction
Three keyboards are discussed in this section. The 83-key keyboard information for the Personal Computer XT and ~ Portable Personal Computer begins below. Information about the IBM Enhanced Personal Computer Keyboard, hereafter referred to as the 101/102-Key Keyboard, begins on page 4-22.
83-Key Keyboard Description
The Personal Computer XT keyboard has a permanently attached cable that connects to a DIN connector at the rear of the system unit. This shielded S-wire cable has power (+S Vdc), ground, and two bidirectional signal lines. The cable is approximately 183 cm (6 ft) long and is coiled, like that of a telephone handset.
The IBM Portable Personal Computer keyboard cable is a ~ detachable, 4-wire, shielded cable that connects to a modular
connector in the front panel of the system unit. The cable has power (+S Vdc), ground, and two bidirectional signal lines in it. It is 762 mm (30 in.) long and is coiled.
Both keyboards use a capacitive technology with a microprocessor (Intel 8048) performing the keyboard scan function. The keyboard has two tilt positions for operator comfort (S- or IS-degree tilt orientations for the Personal Computer XT and S- or 12-degree tilt orientations for the IBM Portable Personal Computer).
Note: The following descriptions are common to both the Personal Computer XT and IBM Portable Personal Computer.
The keyboard has 83 keys arranged in three major groupings. The central portion of the keyboard is a standard typewriter keyboard layout. On the left side are 10 function keys. These keys are user-defined by the software. On the right is a IS-key keypad. These keys are also defined by the software, but have legends for the functions of numeric entry, cursor control, calculator pad, and screen edit.
83-Key Keyboard 4-3
The keyboard interface is defined so that system software has maximum flexibility in defining certain keyboard operations. This is accomplished by having the keyboard return scan codes rather than American Standard Code for Information Interchange (ASCII) codes. In addition, all keys are typematic (if held down, they will repeat) and generate both a make and a break scan code. For example, key 1 produces scan code hex 01 on make and code hex 81 on break. Break codes are formed by adding hex 80 to make codes. The keyboard I/O driver can define keyboard keys as shift keys or typematic, as required by the application.
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The keyboard microprocessor (Intel 8048) performs several functions, including a power-on self test when requested by the system unit. This test checks the keyboard's ROM, tests memory, and checks for stuck keys. Additional functions are keyboard scanning, buffering of up to 16 key scan codes, maintaining bidirectional serial communications with the system unit, and executing the handshake protocol required by each scan-code transfer.
Several different keyboard arrangements are available. These are illustrated on the following pages. For information about the keyboard routines required to implement non-US keyboards, refer to the Guide to Operations and DOS manuals.
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4-4 83-Key Keyboard
Block Diagram
8255A-5
PAO PAl PA2 PA3 PA4 PA5 PAS PA7
10 PB7
7407
PBS
lS322
+5V +5V
..... _
~
~ L..
r-<
OH OG OF OE 00 OC OB OA -OE 01 DO -ClR ClK -SE OS S/-P -G
OHl I--
+5V
,-1
Keyboard Clock o ---<
- Keyboard Data 0 -Reset 0 GND 0 +5 V 0 '- 5
p - 7407
[:S175
IRO
o I---<~
ClK
P - P R ClR O i l
PClK
lS175
0
0
elK
~ -ClK 0
lS175
0
0
-
,-<
ClK -ClR
op--
-RESET
Keyboard Interface Block Diagram
83-Key Keyboard 4-5
Keyboard Encoding and Usage
Encoding
The keyboard routine provided by IBM in the ROM BIOS is responsible for converting the keyboard scan codes into what will be, termed "Extended ASCII."
~
Extended ASCII encompasses I-byte character codes with possible values of 0 to 255, an extended code for certain extended keyboard functions, and functions handled within the keyboard routine or through interrupts.
Character Codes
The following character codes are passed through the BIOS keyboard routine to the system or application program. A '-1' means the combination is suppressed in the keyboard routine. The codes are returned in AL.
4-6 83-Key Keyboard
Key
Base Case
Uppercase
Ctr]
Alt
1 2 3 4 5 6
7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Ctr] 30 31 32 33 34 35 36 37 38 39 40
41 42 Sh i ft
(Left ) 43 44 45 46
Esc 1 2 3 4 5 6 7 8 9 0
-
=
Backspace (008)
---+1 (009)
q w
e r t
Y
u i
0
p
[ ]
CR -1 a s d f
9 h
j k
]
; I
I
-1
\ z x
c
Esc !
@
# $ %
/\
~
( )
+
Backspace (008)
1.- (*)
Q w E R T
Y
U
/
0
p { }
CR -1 A
S D F G H
J
K L
:
"
~
-1
z 1
X C
-1
-1
-1 Nu l( 000) ('" )
( (
''""
) )
-1
('" )
-1
("')
-1
("')
RS(030)
(*)
-1
(*)
-1
('" )
-1 -1
( (
''""
) )
US(03])
(* )
-1
( '" )
Del(12?)
-1
-1
-1
DC1(01?)
(* )
ETB(023)
(* )
ENQ(005)
( '" )
DC2(018)
(" )
DC4(020)
(* )
EM(025)
(* )
NAK(021)
(" )
HT(009)
(*)
S/(015)
(*)
DLE(016)
(* )
Esc(02?)
(*)
GS(029)
-1
LF(010)
-1
-1
-1
SOH(OO]) DC3(019)
( (
''""
) )
EOT(004)
(*)
ACK(006)
(*)
BEL( OO?)
(*)
BS(008)
(*)
LF(010)
(*)
VT (01 ])
( *)
FF(012)
(* )
-1
-1
-1
-1
FS(028)
-1
-1
-1
FS(028)
-1
SUB(026)
(*)
CAN(024)
(*)
ETX(003)
(* )
Notes:
(") Refer to "Extended Functions " in this section.
Character Codes (Part 1 of 2)
83-Key Keyboard 4-7
Key
Base Case
Uppercase
Ctrl
Alt
47 48 49 50 51 52
53 54 Sh ift
(Right)
55 56 Alt 57 58 Caps
Lock
69 Num
Lock
70 Scroll
Lock
107 108 112
113 114
115 116 117 118
v b
n
m .
/ -1
'"
-1 Space -1
-1
-1
-
Enter Null ( " ) Nu 11 ('" ) Nu 11 ('" ) Nu 11 (*) Null ( " ) Nu 11 (* ) Null (* )
V
B N
M <
>
?
-1
PrtSc -1 Space -1
-1 ('" )
-1
-
Enter
Nu 11 Nu 11
('" )
( '" )
Nu 11 ('" ) Null ( " ) Nu 11 ( * ) Nu 11 ( * ) Nu 11 (* )
SYN(022) STX(002) SO(014) CR(013) -1 -1 -1 -1
?
-1 Space -1
Pause ("'''')
Break ("'''')
('" ) -1 Nu 11 ('" ) Nu 11 ('" ) Nu 11 ("') Nu 11 (* ) Nu 11 (* ) Null (* ) Nu 11 (* )
('" )
('" )
('" )
('" )
-1
-1
-1
-1
?
-1 Space
-1
-1
-1
('" )
-1 Nu 11 (") Null("') Null(*) Null(*) Null(") Null(*) Null("')
Notes:
('" ) Refer to "Extended Functions" in this section.
(*"') Refer to "Special Hand 1i ng " in this section.
Character Codes (Part 2 of 2)
Keys 71 through 83 have meaning only in base case, in Num Lock (or shifted) states, or in Ctrl state. Note that the Shift key temporarily reverses the current Num Lock state.
4-8 83-Key Keyboard
Extended Codes
Extended Functions
For certain functions that cannot be represented in the standard ASCII code, an extended code is used. A character code of 000 (Null) is returned in AL. This indicates that the system or application program should examine a second code that will indicate the actual function. Usually, but not always, this second code is the scan code of the primary key that was pressed. This code is returned in AH.
Shift States
Most shift states are handled within the keyboard routine and are not apparent to the system or application program. In any case, the current set of active shift states is available by calling an entry point in the ROM keyboard routine. The key numbers are shown on the keyboard diagrams beginning on page 4-12. The following keys result in altered shift states:
Shift
This key temporarily shifts keys 2-13, 15-27,30-41,43-53,55, 59-68 to uppercase (base case if in Caps Lock state). Also, the Shift key temporarily reverses the Num Lock or non-Num-Lock state of keys 71-73,75,77, and 79-83.
Ctrl
This key temporarily shifts keys 3, 7,12,14, 16-28,30-38, 43-50,55,59-71,73,75, 77, 79, and 81 to the Ctrl state. Also, the Ctrl key used with the Alt and Del keys causes the system reset function; with the Scroll Lock key, the break function; and ~ with the Num Lock key,the pause function. The system reset, break, and pause functions are described in "Special Handling" on the following pages.
83-Key Keyboard 4-9
Alt
This key temporarily shifts keys 2-13, 16-25,30-38,44-50, and 59-68 to the Alt state. Also, the Alt key is used with the Ctrl and Del keys to cause the system reset function described in "Special Handling" on the following pages.
The Alt key has another use. This key allows the user to enter any ASCII character code from 1 to 255 into the system from the keyboard. The user holds down the Alt key and types the decimal value of the characters desired using the numeric keypad (keys 71-73,75-77, and 79-82). The Alt key is then released. If more than three digits are typed, a modulo-256 result is created. These three digits are interpreted as a character code and are transmitted through the keyboard routine to the system or application program. Alt is handled within the keyboard routine.
Caps Lock
This key shifts keys 16-25, 30-38, and 44-50 to uppercase. Pressing the Caps Lock key a second time reverses the action. Caps Lock is handled within the keyboard routine.
Scroll Lock
This key is interpreted by appropriate application programs as indicating that use of the cursor-control keys should cause windowing over the text rather than cursor movement. Pressing the Scroll Lock key a second time reverses the action. The keyboard routine simply records the current shift state of the Scroll Lock key. It is the responsibility of the system or application program to perform the function.
Shift Key Priorities and Combinations
If combinations of the Alt, Ctrl, and Shift keys are pressed and only one is valid, the precedence is as follows: the Alt key is first,
the Ctrl key is second, and the Shift key is third. The only valid
combination is Alt and Ctrl, which is used in the system reset
function.
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4-10 83-Key Keyboard
Special Handling
System Reset The combination of the Alt, Ctrl, and Del keys will result in the keyboard routine initiating the equivalent of a system reset. System reset is handled within the keyboard routine.
Break The combination of the Ctrl and Break keys will result in the keyboard routine signaling interrupt hex IB. Also the extended
characters (AL = hex 00, AH = hex 00) will be returned.
Pause The combination of the Ctrl and Num Lock keys will cause the keyboard interrupt routine to loop, waiting for any key except the Num Lock key to be pressed. This provides a system- or ~ application-transparent method of temporarily suspending list, print, and so on, and then resuming the operation. The "unpause" key is thrown away. Pause is handled within the keyboard routine.
Print Screen The combination of the Shift and PrtSc keys will result in an interrupt invoking the print screen routine. This routine works in the alphameric or graphics mode, with unrecognizable characters printing as blanks.
83-Key Keyboard 4-11
Extended Functions
The keyboard routine does its own buffering. The keyboard buffer is large enough that few typists will ever fill it. However, if a key is pressed when the buffer is full, the key will be ignored and the "bell" will sound. Also, the keyboard routine suppresses the typematic action of the following keys: Ctrl, Shift, Alt, Num Lock, Scroll Lock, Caps Lock, and Ins.
Keyboard Layouts
The IBM Personal Computer keyboard is available in six different layouts as shown on the following pages: · French · German · Italian · Spanish · UK English · US English
4-12 83-Key Keyboard
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g.
i(]i[] i[] 5[EJIEJj l iO irDI[] EJ --
-
-
-
-
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j[]
-
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~ ~
G(EJrEJJ
"iEJrEJJ
''(O[E]Ja~E1J'@[l]ErJI~[1][I]ErJEIJ[1JE1'J[r]erJElJ'n[~JIErJ[i]rrJElJ[1J[l]u81U[~](Bg[1][I][1~]llErJ~j
[
6[EJIEJj r lu8rIDIEJlEJrEJrtJJEJrEJT[JlDr[JrDJ(Erl1EfI[JI[JI~l'·
6l7'E9J6180u J wuu lrl~I~[
57
~
Cap. Lock
D8ill0I~ olOB~iL--e-r--ru-,
Note: Nomenclature is on both the top and front face of keybuttons
oc
as shown. The number to the upper left designates the button
Y.I
I
position.
~
~
'<
~
g ~
=e;
+,>
......
w
11 NOIl3~S
-~
~
a ~
~
~
t ~
~ ~
r 5[EJrEJJ iEJiGJ~iroi[]1[]i[[]froilJI([]llJi[]iDjOB01D§OlD~:::0 ~=~
6(EJrEJJ
'[EJIEJJ
l'EO[];E]JUrEEJJIrEEJJI1[]QI'[E]JIr[1]'lJ'1[E]Il~rl[[]Jrl[~]Il[E]JI[i]BliuEPlI~bJt[~]n1Dl[~]I'E"J~J
...
50r;.lIJ[ r 66lL7[ELJJ11I6EF81J08JJ
1U~IPIEJJ[JrEJrEJrEJrEJrtJIOrDrEJJ[E]BI[JI[JI~l"
UU
57
il lLeLJ n Cap, lock
80~ rolO~TTI
Note: Nomenclature is on both the top and front face of keybuttons as shown. The number to the upper left designates the button position.
)
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'rEJIEJJ
I- EJi- []- i(]- i[]- i[]- i[]- i[- ]I[- ]ir- oI[- ]i~- lDI- EJjOB[}D§]]~~:::
-~_.
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~
~
6(EJrEJJ "181EJJ
I'0H[J]IUEEJJrI[E]JIr[[]]Il[U]rrE[J]Tn~~JTrEEJJll[[]]lrE[J]Ir[[J]rl[[]]lUID[r]~~k7:1lgl1([[]]rI~~:I[rJ-J
[
iJ r 6rEJIEJJ lu8rIDI[Jr[JrEJrEJr~rEJlBIOrOyLJJ[BaEJI[Jt[]IlQ,,+
6l7F9EJ168flOBJ °~OEJ''u
57
n Cap. Lock
tf-'Ji~:OJTL--l-Lr-eru-,i
Note: Nomenclature is on both the top and front face of keybuttons
as shown. The number to the upper left designates the button
QO
t....I
position.
I
~
~
'<
~
~
l
e;
=
-.j:::..
I
VI
17 NOIl:l:JS
-.r,;:..
0'1
rJ1
_."C
§
QC ~ I
~
~
'-<
~
a~ . ~
EJ 5l9F'EIJt6J8J
'l Esc
12~[J
l3~~l4LfUi1ll5~f$ll6~fl%~l7lfT~llBl(&!l9.F.Jl'°lfL(lU"Il1~l'l2Full'lC+J=~i
'
on
LJ
9DiJF2uu4u~~'~~:1::
=[IJ
~ ~
6(EJrEJJ
'iElIEJJ
l'E([lJ]U1E~JJIrE[J]Ir[E]JI1[[]]r[rJElJ'l[t]Jl1~EllDlI[E]Jrl[[]]rrpElJli(1JJTI~D~7[']~l1U[l]I[~]I'E"J~J
f
co.
r 6[EJIEJJ
6l7FE9 J16BOLJJ
luE1JiDI[JIEJr[JrEJr~rEJIEJrDt[JrDltEJafBI[gI[JI~.·"
57 cap'OOfOlOt--rr, il u 5~ DEAltJ'~[~ lock
t:J ~Lr-u
Note: Nomenclature is on both the top and front face of keybuttons as shown. The number to the upper left designates the button position.
)
)
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)
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~
--
5[EJTEJJ
l-EJi-[]i-GJ1-[]i-[]-i[]-i(]-i[J-IG'J-I[]-i[]-iui-[]JOG01D§[JID
~:::~ [;
a~ .
~
lEJrEJJ '18[EJJ
''O(B[]oCtIJErJEiJErJEIJ[]rI[E]JlrE[JJll'rrJJIEreJ:IDJlI~ElJ[l[]]lI[']Olui[E]JUl[8 ~]~7[']~II[[]]lI[~]I"O~J
Q.
6[EJIEJJ luEJulDIEJIEJrEJrEJrEJrEJIEJf[JrEJr[]J(EfaBI[gt[JI~l'-
TEJyBJ 5(JEJ[Jj(
57
J[ ~:~:OlO~OJ~EIJ
Note: Nomenclature is on both the top and front face of keybuttons
QC ~
as shown. The number to the upper left designates the button
I
~
position.
f
c.
,.j::>.
.....
-.I
17 NOll33S
-.j:::. I
00
~ rJ1
,QC
~
:;.::
~
'<
~
5[EJTEJJ IEJIUJI[]i[JilJ1[]i(]i[Ji[JI[]i[]iEJi[;]jOBOiJ§JO=~::=:0' f
~
CI"
[
lEJrEJJ
'rEJrEJJ
l'(l§EU]EEJJr1EEJJrltEJJIE1IJJI[IJEl'JtJ1lEEJJllEElJr1E'EJJ1l[E]JrID[]f1L[J[]I2D8.~J[7]'I~[r][i][1]~'I"E~JJ
=
6Tl7LE1':JJ16I!8E0uJJJ
luELr[JI[Jr[Jr[JrEJr[]ltJlEJrIJr[Jr[]JOEJDlBI1QI1DI~'
57 J58 1w r-r:r-I~[ Uwl~ CL::'S Wr~ltf:OJlO~ fit::T,
1+
Note: Nomenclature is on both the top and front face of keybuttons as shown. The number to the upper left designates the button position.
)
)
)
Connector Specifications
Rear Panel
5-Pin DIN Connector
Pin
TTL Signal
Signal Level
1
+ Keyboard Clock
2
+ Keyboard Data
3
- Keyboard Reset
(Not used by keyboard
+ 5 Vdc
+ 5 Vdc
Power Supply Voltages
Vo ltage
4
Ground
5
+ 5 Volts
0
+ 5 Vdc
Keyboard Interface Connector Specifications
83-Key Keyboard 4-19
I I
II
II , I
Connector
Keyboard Cable Connections
DIN Connector
,G}
4 0 00 5
Modular Connector
e
Keyboard Connector
2
123456
Clock Data Ground +5 Volts
Pin Side 1 2 4 5
Pin Side 4 5 3 2
Wire Side 6 5 4 2
Modular connector pin 1 is connected to the ground wire going to the chassis.
The ground wire at the keyboard connector is attached to the ground screw on the keyboard logic board.
4-20 83-Key Keyboard
Keyboard Logic Diagram
("I
1
I
;!
;!
§ ~
~
"
'"
~
~ :Ii
i"
ii
1::1
~
= "
Q".
U
CI ~
"1 "I "I =L ~B
L - -_____---------1'~I'
83-Key Keyboard 4-21
lOl/102-Key Keyboard
Description
The keyboard has 101 keys (102 in countries outside the U. s.).
At system power-on, the keyboard monitors the signals on the 'clock' and 'data' lines and establishes its line protocol.
4-22 lOl/102-Key Keyboard
Cables and Connectors
I~
The keyboard cable connects to the system with a 5-pin DIN connector, and to the keyboard with a 6-position SDL connector. The following table shows the pin configuration and signal assignments.
2 DIN Connector
SDL Connector
DIN Connector Pins
1 2
3 4 5
Shield
SOL Connector Pins
C E A
D
B F Shield
Signal Name
Signal Type
+KBD ClK +KBD DATA Reserved
Ground +5.0 Vdc Not used Frame Ground
Input/Output Input/Output
Power Power
Sequencing Key-Code Scanning
The keyboard detects all keys pressed, and sends each scan code ~ in the correct sequence. When not serviced by the system, the
keyboard stores the scan codes in its buffer.
lOl/102-Key Keyboard 4-23
Keyboard Buffer
A 16-byte first-in-first-out (FIFO) buffer in the keyboard stores the scan codes until the system is ready to receive them.
A buffer-overrun condition occurs when more than 16 bytes are placed in the keyboard buffer. An overrun code replaces the 17th byte. If more keys are pressed before the system allows keyboard output, the additional data is lost.
1"""""'\
When the keyboard is allowed to send data, the bytes in the buffer will be sent as in normal operation, and new data entered is detected and sent. Response codes do not occupy a buffer position.
If keystrokes generate a multiple-byte sequence, the entire sequence must fit into the available buffer space or the keystroke is discarded and a buffer-overrun condition occurs.
Keys
With the exception of the Pause key, all keys are makeI break.
The make scan code of a key is sent to the keyboard controller
when the key is pressed. When the key is released, its break scan
code is sent.
~
Additionally, except for the Pause key, all keys are typematic.
When a key is pressed and held down, the keyboard sends the
make code for that key, delays 500 milliseconds ± 20%, and
begins sending a make code for that key at a rate of 10.9
characters per second ± 20%.
If two or more keys are held down, only the last key pressed
repeats at the typematic rate. Typematic operation stops when
the last key pressed is released, even if other keys are still held
down. If a key is pressed and held down while keyboard
transmission is inhibited, only the first make code is stored in the
buffer. This prevents buffer overflow as a result of typematic action.
1'"'"""'\
4-24 lOl/102-Key Keyboard
Power-On Routine
The following activities take place when power is first applied to the keyboard.
Power-On Reset
The keyboard logic generates a 'power-on reset' signal (POR) when power is first applied to the keyboard. POR occurs during 150 milliseconds to 2.0 seconds from the time power is first applied to the keyboard.
Basic Assurance Test
The basic assurance test (BAT) consists of a keyboard processor test, a checksum of the read-only memory (ROM), and a random-access memory (RAM) test. During the BAT, activity on the 'clock' and 'data' lines is ignored. The BAT takes from 300 to 500 milliseconds. This is in addition to the time required by the POR. Upon satisfactory completion of the BAT, a completion code (hex AA) is sent to the system, and keyboard scanning begins. If a BAT failure occurs, the keyboard sends an error code to the system. The keyboard is then disabled pending command input. Completion codes are sent 450 milliseconds to 2.5 seconds after POR, and between 300 and 500 milliseconds after a Reset command is acknowledged. Immediately following POR, the keyboard monitors the signals on the keyboard 'clock' and 'data' lines and sets the line protocol.
lOl/102-Key Keyboard 4-25
Commands from the System
Reset (Hex FF)
The system lowers the 'clock' line for a minimum of 12.5 milliseconds. The keyboard then begins to clock bits on the 'data' line. The result is a Reset command causing the keyboard to reset itself, perform a BAT, and return the appropriate completion code.
~
Commands to the System
The following table shows the commands that the keyboard may send to the system, and their hexadecimal values.
Command
Hex Value
BAT Completion Code
AA
BAT Failure Code
Fe
Key Detection Error/Overrun
FF
The commands the keyboard sends to the system are described below, in alphabetic order.
~
BAT Completion Code (Hex AA)
Following satisfactory completion of the BAT, the keyboard sends hex AA. Any other code indicates a failure of the keyboard.
BAT Failure Code (Hex FC)
If a BAT failure occurs, the keyboard sends this code, discontinues scanning, and waits for a system response or reset.
4-26 lOl/102-Key Keyboard
Key Detection Error (Hex FF)
The keyboard sends a key detection error character (hex FF) if conditions in the keyboard make it impossible to identify a switch closure.
Overrun (Hex FF)
An overrun character (hex FF) is placed in the keyboard buffer and replaces the last code when the buffer capacity has been exceeded. The code is sent to the system when it reaches the top of the buffer queue.
lOl/102-Key Keyboard 4-27
Keyboard Scan Codes
Each key is assigned a base scan code and, in some cases, extra codes to generate artificial shift states in the system. The typematic scan codes are identical to the base scan code for each key.
~
Scan Code Tables
The following keys send the codes as shown, regardless of any shift states in the keyboard or the system. Refer to "Keyboard Layouts" beginning on page 4-44 to determine the character associated with each key number.
Key Number
Make Code
Break Code
1
29
A9
2
02
82
3
03
83
4
04
84
5
05
85
6
06
86
7
07
87
8
08
88
9
09
89
10
OA
8A
11
OB
8B
12
OC
8C
13
OD
8D
15
OE
8E
16
OF
8F
17
10
90
18
11
91
19
12
92
20
13
93
21
14
94
22
15
95
23
16
96
24
17
97
25
18
98
26
19
99
27
lA
9A
28
29 *
1 B 2B
9B
AB
30
3A
BA
31
1 E
9E
32
IF
9F
33
20
AO
.L 101-key keyboard only.
4-28 lOl/102-Key Keyboard
Key Number
Make Code
34 35 36 37 38 39 40 41 42 ~.L 43 44
45 **
46 47 48 49 50 51 52 53 54 55 57 58 60 61 62 64 90 91 92 93 96 97 98 99 100 101 102 103 104 105 106 108 110 112 113 114 115 116 117 118 119
21 22 23 24 25 26 27 28 2B lC 2A 56 2C 2D 2E 2F 30 31 32 33 34 35 36 1 D 38 39 EO 38 EO 1D 45 47 4B 4F 48 4c 50 52 37 49 4D 51 53 4A 4E EO lC 01 3B 3C 3D 3E 3F 40 41 42
.'t* 102-key keyboard only.
Break Code
Al A2 A3 A4 A5 A6 A7 A8 AB 9C
AA
D6 AC AD AE AF BO B 1 B2 B3 B4 B5 B6 9D B8 B9 EO B8 EO 9D C5 C7 CB CF c8 CC DO D2 B7 C9 CD D 1 D3 CA CE EO 9C 81 BB BC BD BE BF CO C 1 C2
lOl/102-Key Keyboard 4-29
Key Number
120 121 122 123 125
Make Code
43 44 57 58 46
Break Code
C3
c4
07
08
C6
The remaining keys send a series of codes dependent on the state of the various shift keys (Ctrl, Alt, and Shift), and the state of Num Lock (On or Off). Because the base scan code is identical to that of another key, an extra code (hex EO) has been added to the base code to make it unique.
Key
Base Case, or
No. Shift+Num Lock
Make/Break
Sh i ft Case Make/Break ~
Num Lock on Make/Break
75
EO 52
lEO 02
76
EO 53
lEO 03
79
EO 4B
lEO CB
80
EO 47
lEO C7
81
EO 4F
lEO CF
83
EO 48
lEO c8
84
EO 50
lEO DO
85
EO 49
lEO C9
86
EO 51
lEO 01
89
EO 4D
lEO CO
EO AA EO 52 lEO 02 EO 2A EO AA EO 53 lEO 03 EO 2A EO AA EO 4B lEO CB EO 2A EO AA EO 47 lEO C7 EO 2A EO AA EO 4F lEO CF EO 2A EO AA EO 48 lEO c8 EO 2A EO AA EO 50 lEO DO EO 2A EO AA EO 49 lEO C9 EO 2A EO AA EO 51 lEO 01 EO 2A EO AA EO 4D lEO CD EO 2A
EO 2A EO 52
lEO 02 EO AA
EO 2A EO 53
lEO 03 EO AA
EO 2A EO 4B
lEO CB EO AA
EO 2A EO 47 lEO C7 EO AA
EO 2A EO 4F
lEO CF EO AA
EO 2A EO 48
lEO c8 EO AA
EO 2A EO 50
lEO DO EO AA
EO 2A EO 49
lEO C9 EO AA
EO 2A EO 51
lEO 01 EO AA
EO 2A EO 40
lEO CD EO AA
* If the left Shift key is held down, the AA/2A shift break
and make is sent with the other scan codes. If the right Shift key is held down, B6/36 is sent. If both Shift keys are down, both sets of codes are sent with the other scan code.
r'\
r'\
4-30 lOl/102-Key Keyboard
Key
Scan Code Make/Break
No.
Shift Case Make/Break *
95
EO 35/EO B5
EO AA EO 35/EO B5 EO 2A
., If the left Shift key is held down, the AA/2A shift break and make is sent with the other scan codes. If the right
Shift key is held down, B6/36 is sent. If both Shift keys are down, both sets of codes are sent with the other scan code.
Key
Scan Code
Ctrl Case, Shift Case
Alt Case
No.
Make/Break
Make/Break
Make/Break
124
EO 2A EO 37
/EO B7 EO AA
EO 37/EO B7
54/04
Key No.
Make Code
Ctrl Key Pressed
126 '"
E1 10 45 El 90 C5
EO 46 EO c6
* This key is not typematic. All associated scan codes
occur on the make of the key.
lOl/102-Key Keyboard 4-31
Clock and Data Signals
The keyboard and system communicate over the 'clock' and
'data' lines. The source of each of these lines is an
open-collector device on the keyboard that allows either the
keyboard or the system to force a line to an inactive (low) level.
When no communication is occurring, the 'clock' line is at an
active (high) level. The state of the' data' line is held inactive
(low) by the keyboard.
An inactive signal will have a value of at least 0, but not greater
than +0.7 volts. A signal at the inactive level is a logical O. An
active signal will have a value of at least +2.4, but not greater
than +5.5 volts. A signal at the active level is a logical 1.
Voltages are measured between a signal source and the dc
network ground.
The keyboard 'clock' line provides the clocking signals used to
clock serial data from the keyboard. If the host system forces the
'clock' line to an inactive level, keyboard transmission is
inhibited.
When the keyboard sends data to the system, it generates the 'clock' signal to time the data. The system can prevent the
keyboard from sending data by forcing the 'clock' line to an
inactive level, or by holding the 'data' line at an inactive level.
r--..
During the BAT, the keyboard allows the 'clock' and 'data' lines
to go to an active level.
4-32 lOl/102-Key Keyboard
Data Stream
Data transmissions from the keyboard consist of a 9-bit data stream sent serially over the' data' line. A logical 1 is sent at an active (high) level. The following table shows the functions of the bits.
Bit
Function
1
Start bit (always 1)
2
Data bit 0 (least-significant)
3
Data bit 1
4
Data bit 2
5
Data bit 3
6
Data bit 4
7
Data bit 5
8
Data bit 6
9
Data bit 7 (most-significant)
Keyboard Data Output
When the keyboard is ready to send data, it first checks the status of the keyboard 'clock' line. If the line is active (high), the ~ keyboard issues a request-to-send (RTS) by making the 'clock' line inactive (low). The system must respond with a clear-to-send (CTS), generated by allowing the 'data' line to become active, within 250 microseconds after RTS, or data will be stored in the keyboard buffer. After receiving CTS, the keyboard begins sending the 9 serial bits. The leading edge of the first clock pulse will follow CTS by 60 to 120 microseconds. During each clock cycle, the keyboard clock is active for 25 to 50 microseconds. Each data bit is valid from 2.5 microseconds before the leading edge until 2.5 microseconds after the trailing edge of each keyboard clock cycle.
Keyboard Encoding and Usage
The keyboard routine, provided by IBM in the ROM BIOS, is responsible for converting the keyboard scan codes into what will be termed Extended ASCII. The extended ASCII codes returned by the ROM routine are mapped to the US English keyboard layout. Some operating systems may make provisions for alternate keyboard layouts by providing an interrupt replacer,
lOl/102-Key Keyboard 4-33
which resides in the read/write memory. This section discusses only the ROM routine. Extended ASCII encompasses I-byte character codes, with possible values of 0 to 255, an extended code for certain extended keyboard functions, and functions handled within the keyboard routine or through interrupts.
Character Codes
The character codes described later are passed through the BIOS keyboard routine to the system or application program. A" -1 " means the combination is suppressed in the keyboard routine. The codes are returned in the AL register. See "Characters, Keystrokes, and Color" later in this manual for the exact codes.
4-34 lOl/102-Key Keyboard
The following figure shows the keyboard layout and key positions.
lOl/102-Key Keyboard 4-35
Key
Base Case
Uppercase
Ctrl
Alt
1 2 3 4 5 6
7 8 9 10 11 12 13 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Caps
Lock 31 32 33 34 35 36 37 38 39 40 41 43 44 Sh ift
(Left ) 46 47 48
I
1 2 3 4 5 6 7 8 9 0 = Backspace (008)
-+1 (009)
q w
e r t Y u i
0
p
{ } \
-1
a s d f
9
h
j
k
I
, I
CR -1
z
x c
~
!
@
# $ %
A & .'c
( )
=1=
Backspace (008)
I+- (*)
Q w E R T
Y
U 1 0 P
{ }
-1 1
A S D F G H
J
K L
:
"
CR -1
Z X C
-1
(* )
-1
(* )
Nul(OOO) (* ) (* )
-1
(* )
-1
(*)
-1
(*)
RS(030)
(* )
-1
(* )
-1
(* )
-1 -1
((*:,
) )
U5(031l
(* )
-1
(* )
De1(12])
(* )
(*)
(*)
DC1(017)
(* )
ETB(023)
(* )
ENQ(005)
(* )
DC2(018) Dc4(020)
((*:,
) )
EM(025)
(* )
NAK(021)
(* )
HT(009 )
(* )
51(015)
(*)
DLE(016)
(* )
Esc(02])
(* )
G5(029)
(* )
F5(028)
(* )
-1
-1
SOH(OOl)
( :, )
DC3(019)
(*)
EOT(004)
(* )
ACK(006)
(*)
BEL (00])
(* )
B5(008)
(* )
LF(OlO)
(* )
VT( 011 )
(* )
FF(012) -1
((*:,
) )
-1
(* )
LF(010)
(*)
-1
-1
SUB(026)
( )
CAN(024)
( )
ETX(003)
( )
Notes:
(:,) Refer to "Extended Functions " in this section.
Character Codes (Part 1 of 2)
4-36 lOl/102-Key Keyboard
Key
Base Case
49 50 51 52
53 54
55 57 Sh i ft
(Right)
58 Ctrl (Left )
60 Alt (Left)
61 62 Al t
(Right)
64 Ctrl (Right)
90 Num Lock
95 100 105 106 108 110 112
113 114
115 116 117 118 119 120 121 122
123 125 Scroll
Lock 126
v
b
n m
,
I
-1
-1
-1
Space -1
-1
-1
~
+ Enter Esc Nu 11 (*) Null ( ,~ ) Null (* ) Nu 11 ( ,~ ) Nu 11 (* ) Nu 11 (* ) Nu 11 (* ) Null ( ,~ ) Null (* ) Null (* ) Nu 11 (* ) Nu 11 (* ) -1
Pause(**)
Uppercase
V B N M
< >
? -1
-1
-1
Space -1
-1
-1
1* -
+ Enter Esc Nu 11 (* ) Nu 11 (*) Null (*) Nu 11 (*) Nu 11 (* ) Nu 11 (* ) Null (* ) Null (* ) Null (* ) Nu 11 (* ) Nu 11 (* ) Nu 11 (* ) -1
Pause(**)
Ctrl
SYN(022) STX(002) SO(014) CR(on) -1 -1 -1 -1
-1
-1
Space -1
-1
-1
(* ) (*) (* ) (* ) LF(010) Esc Nu 11 (*) Nu 11 (*) Nu 11 (*) Nu 11 (*) Nu 11 (* ) Nu 11 (*) Nu 11 (* ) Nu 11 (*) Nu 11 (*) Nu 11 (*) Null (* ) Nu 11 ( *) -1
Break(**)
Alt
(*)
(* )
(* )
(* )
( *)
(* )
(*)
-1
-1
-1
Space -1
-1
-1
( *)
(*) (* ) (* ) (* ) ( *) Null(*) Null(*) Null(*) Null(*) Null(*) Null(*) Null(*) Null(*) NulJ(*) Null(*) Null(*) Null(*) -1
Pause(**)
Notes:
i*) Refer to "Extended Functions" in this section.
("*) Refer to "Special Hand 1 i ng " in this section.
Character Codes (Part 2 of 2)
lOl/102-Key Keyboard 4-37
The following table lists keys that have meaning only in Num Lock, Shift, or Ctrl states. The Shift key temporarily reverses the current Num Lock state.
Num
Key Lock Base Case
AIt
Ctrl
91 7 92 4 93 1 96 8
97 5
98 2 99 0 101 9
102 6
103 3
104
Home ('~)
-1
.... (*)
-1
End (*)
-1
t (*)
-1
( ,\ )
-1
~ (*)
-1
Ins
-1
Page Up ( ,\ )
-1
-+ (*)
-1
Pa~e Down
(" )
Delete (* ,'~*)
-1
( *,~ )
Clear Screen
Reverse Word(*)
Erase to EOL(*)
(*)
(* ) (* )
(* )
Top of Text
and Home
Advance Word
(*)
Erase to EOS
(* )
(**)
Notes:
(*) Refer to "Extended Functions " in this section.
(**) Refer to "Special Hand ling " in this section.
Special Character Codes
Extended Functions
For certain functions that cannot be represented by a standard ASCII code, an extended code is used. A character code of 000 (null) is returned in AL. This indicates that the system or application program should examine a second code, which will indicate the actual function. Usually, but not always, this second code is the scan code of the primary key that was pressed. This code is returned in AH.
1"""'0,
4-38 lOl/102-Key Keyboard
The following table is a list of the extended codes and their functions.
Second Code
1
3 14 15 16-25 26-28 30-38 39-41 43 44-50 51-53 55 59-68 71
72 73 74 75 76 77 78 79 80 81 82 83 84-93 94-103 104-113 114 115 116 117 118 119 120-131 132 133-134 135-136 137-138 139-140
141
142
143
144
145
146
147
148
149
150
Function
AIt Esc
Nul Character
Alt Backspace
I+- (Back-tab)
Alt Q, W, E, R, T, Y, U, I , 0, P
AIt [ 1 +-l
Alt AIt
A, S, , D, ,F,
;
G,
H,
J,
K,
L
AIt \
Alt Al t
Z,
,
X,
. C,
V, /
B,
N,
M
AIt Keypad ;~
FI to FlO Function Keys (Base Case)
Home
t (Cursor Up)
Page Up
Alt Keypad
.... (Cursor Left)
Center Cursor
-. (Cursor Right)
Alt Keypad +
End
~ (Cursor Down)
Page Down
Ins (Insert)
Del (Delete)
Shift Fl to FlO
Ctrl Fl to FlO
AIt F1 to FlO
Ctrl PrtSc (Start/Stop Echo to Printer)
Ctrl .... (Reverse Word)
Ctrl -. (Advance Word)
Ctrl End (Erase to End of Line-EOL)
Ctrl PgDn (Erase to End of Screen-EOS)
Ctrl Home (Clear Screen and Home)
Alt 1, 2, 3,4, 5, 6, 7, 8, 9, 0, -, = keys 2-13
Ctrl PgUp (Top 25 Lines of Text and Cursor Home)
F11, F 12
Shift Fll, F12
Ctrl Fll, F12
Alt Fl1, F12
Ctr I Up/8
Ctr I Keypad
Ctr I Keypad 5
Ctr I Keypad +
Ctr I Down/2
Ctrl Ins/O
Ctrl Del/.
Ctr I Tab
Ctrl Keypad /
Ctr 1 Keypad *
Keyboard Extended Functions (Part 1 of 2)
lOl/102-Key Keyboard 4-39
Second
Code
Function
151
Alt Home
152
Alt Up
153
Alt Page Up
155
AIt Left
157
Alt Right
159
Alt End
160
Alt Down
161
AIt Page Down
162
Alt Insert
163
Alt Delete
164
AIt Keypad /
165
Alt Tab
166
Alt Enter
Keyboard Extended Functions (Part 2 of 2)
Shift States
Most shift states are handled within the keyboard routine, and are not apparent to the system or application program. In any case, the current status of active shift states is available by calling an entry point in the BIOS keyboard routine. The following keys result in altered shift states:
Shift: This key temporarily shifts keys 1 through 13, 16 through 29,31 through 41, and 46 through 55, to uppercase (base case if in Caps Lock state). Also, the Shift temporarily reverses the Num Lock or non-Num Lock state of keys 91 through 93,96,98, 99, and 101 through 104.
Ctrl: This key temporarily shifts keys 3, 7,12,15 through 29,31 through 39, 43, 46 through 52, 75 through 89, 91 through 93,95 through 108, 112 through 124 and 126 to the Ctrl state. The etrl key is also used with the Alt and Del keys to cause the system-reset function; with the Scroll Lock key to cause the break function; and with the Num Lock key to cause the pause function. The system-reset, break, and pause functions are described under "Special Handling" later in this section.
4-40 lOl/102-Key Keyboard
Alt: This key temporarily shifts keys 1 through 29, 31 through 43,46 through 55, 75 through 89, 95, 100, and 105 through 124 to the Alt state. The Alt key is also used with the Ctrl and Del keys to cause a system reset.
~
°The Alt key also allows the user to enter any character code from to 255. The user holds down the Alt key and types the decimal value of the characters desired on the numeric keypad (keys 91 through 93, 96 through 99, and 101 through 103). The Alt key is then released. If the number is greater than 255, a modulo-256 value is used. This value is interpreted as a character code and is sent through the keyboard routine to the system or application program. Alt is handled internal to the keyboard routine.
Caps Lock: This key shifts keys 17 through 26, 31 through 39, and 46 through 52 to uppercase. When Caps Lock is pressed again, it reverses the action. Caps Lock is handled internal to the keyboard routine.
Scroll Lock: When interpreted by appropriate application programs, this key indicates that the cursor-control keys will cause windowing over the text rather than moving the cursor. ~ When the Scroll Lock key is pressed again, it reverses the action. The keyboard routine simply records the current shift state of the Scroll Lock key. It is the responsibility of the application program to perform the function.
Num Lock: This key shifts keys 91 through 93, 96 through 99, and 101 through 104 to uppercase. When Num Lock is pressed again, it reverses the action. Num Lock is handled internal to the keyboard routine.
Shift Key Priorities and Combinations: If combinations of the Alt, Ctrl, and Shift keys are pressed and only one is valid, the priority is as follows: the Alt key is first, the Ctrl key is second, and the Shift key is third. The only valid combination is Alt and Ctrl, which is used in the system-reset function.
lOl/102-Key Keyboard 4-41
Special Handling
System Reset
The combination of any Alt, Ctrl, and Del keys results in the keyboard routine that starts a system reset or restart. System reset is handled by BIOS.
Break
The combination of the Ctrl and Pause/Break keys results in the keyboard routine signaling interrupt hex lB. The extended characters AL=hex 00, and AH=hex 00 are also returned.
Pause
The Pause key causes the keyboard interrupt routine to loop, waiting for any character or function key to be pressed. This provides a method of temporarily suspending an operation, such as listing or printing, and then resuming the operation. The method is not apparent to either the system or the application program. The key stroke used to resume operation is discarded. Pause is handled internal to the keyboard routine.
Print Screen
The Print Screen key results in an interrupt invoking the print-screen routine. This routine works in the alphameric or graphics mode, with unrecognizable characters printing as blanks.
System Request
When the System Request (Alt and Print Screen) key is pressed, a hex 8500 is placed in AX, and an interrupt hex 15 is executed. When the Sys Req key is released, a hex 8501 is placed in AX, and another interrupt hex 15 is executed. If an application is to use System Request, the following rules must be observed:
~
4-42 lOl/102-Key Keyboard
Save the previous address. Overlay interrupt vector hex 15. Check AH for a value of hex 85: If yes, process may begin.
If no, go to previous address.
The application program must preserve the value in all registers, except AX, upon return. System Request is handled internal to the keyboard routine.
Other Characteristics The keyboard routine does its own buffering, and the keyboard buffer is large enough to support entries by a fast typist. However, if a key is pressed when the buffer is full, the key will be ignored and the "alarm" will sound. The keyboard routine also suppresses the typematic action of the ~ following keys: Ctrl, Shift, Alt, Num Lock, Scroll Lock, Caps Lock, and Ins. During each interrupt hex 09 from the keyboard, an interrupt hex 15, function (AH)=hex 4F is generated by the BIOS after the scan code is read from the keyboard adapter. The scan code is passed in the (AL) register with the carry flag set. This is to allow an operating system to intercept each scan code prior to its being handled by the interrupt hex 09 routine, and have a chance to change or act on the scan code. If the carry flag is changed to
oon return from interrupt hex 15, the scan code will be ignored
by the interrupt handler.
lOl/102-Key Keyboard 4-43
Keyboard Layouts
The keyboard is available in six layouts: · French · German · Italian · Spanish · UK English · US English The various layouts are shown in alphabetic order on the following pages. Nomenclature is on both the top and front face of the keybuttons. The number to the upper right designates the keybutton position.
4-44 lOl/102-Key Keyboard
French Keyboard
lOl/102-Key Keyboard 4-45
German Keyboard
4-46 lOl/102-Key Keyboard
Italian Keyboard
lOl/102-Key Keyboard 4-47
Spanish Keyboard
4-48 lOl/102-Key Keyboard
)
BE,e
-
=
-'-
-
=
N
I
~
~
'< ~
a~ .
a o
+:
I
+:
I.D
)
11 NOll33S
)
c
~
-=tr1
(J.Q...
=III
~
~
~ ; r
0
~ ""l
Q.
US English Keyboard
4-50 lOl/102-Key Keyboard
Specifications
The specifications for the keyboard follow.
Power Requirements
· +5 Vdc ± 10% · Current cannot exceed 275 rnA.
Size
· Length: 492 millimeters (19.4 inches) · Depth: 210 millimeters (8.3 inches) · Height: 58 millimeters (2.3 inches), legs extended
Weight
2.25 kilograms (5.0 pounds)
4-51
Logic Diagram
'7":'''7''1 ":''f '"7" Of' ~~~~qqq~
.
=
=
. =
~o-
+
~
Q
a:
o4(
:
>III
W
"
~
> w
~
N
o,....
~
-w~ §Z~ ~l
;
~
~:
~
~
=~
~
.,......... ,o....
~
~
~
0
~
~~
~
~~
4-52
SECTION 5. SYSTEM BIOS
System BIOS Usage ............................ 5-3
Vectors with Special Meanings .............. 5-5
System BIOS Listing - 11/22/85 ................. 5-11
Quick Reference - 256/640K Board ........... 5-11
System BIOS Listing - 11/8/82 ................. 5-111
Quick Reference - 64/256K Board ........... 5-111
System BIOS 5-1
Notes:
5-2 System BIOS
System BIOS Usage
The basic input/output system (BIOS) resides in ROM on the system board and provides device level control for the major I/O devices in the system. Additional ROM modules may be located on option adapters to provide device level control for that option adapter. (BIOS listings for an option adapter are located in the Technical Reference Options and Adapters manual.) BIOS routines enable the assembler language programmer to perform block (disk and diskette) or character-level I/O operations without concern for device address and operating characteristics. System services, such as time-of-day and memory size determination, are provided by the BIOS.
Note: BIOS listings for both the 256/640 and 64/256 system boards are included in this manual.
The goal is to provide an operational interface to the system and relieve the programmer of the concern about the characteristics of hardware devices. The BIOS interface insulates the user from the hardware, thus allowing new devices to be added to the system, ~ yet retaining the BIOS level interface to the device. In this manner, user programs become transparent to hardware modifications and enhancements.
The IBM Personal Computer Macro Assembler manual and the IBM Personal Computer Disk Operating System (DOS) manual provide useful programming information related to this section. A complete listing of the BIOS is given in this section.
Access to the BIOS is through the 8088 software interrupts. Each BIOS entry point is available through its own interrupt.
The software interrupts, hex 10 through hex lA, each access a different BIOS routine. For example, to determine the amount of memory available in the system,
INT 12H
invokes the BIOS routine for determining memory size and returns the value to the caller.
System BIOS 5-3
Parameter Passing
All parameters passed to and from the BIOS routines go through
the 8088 registers. The prologue of each BIOS function indicates
the registers used on the call and the return. For the memory size
example, no parameters are passed. The memory size, in lK-byte
increments, is returned in the AX register.
r-'\
If a BIOS function has several possible operations, the AH register is used as input to indicate the desired operation. For example, to set the time of day, the following code is required:
MOV AH,l
;function is to set time of day.
MOV CX,HIGH_COUNT ;establish the current time.
MOV DX,LOW_COUNT
INT lAH
;set the time.
To read the time of day:
MOV AH,O
;function is to read time of day.
INT lAH
;read the timer.
Generally, the BIOS routines save all registers except for AX and the flags. Other registers are modified on return only if they are returning a value to the c~ller. The exact register usage is in the prologue of each BIOS function.
Int Address
0
0-3
1
4-7
2
8-B
3
C-F
4
10-13
5
14-17
6
18-1B
7
lC-1F
8
20-23
9
24-27
A 28-2B
B 2C-2F
C 30-33
Name
Divide by Zero Single Step Nonmaskable Breakpoint Overflow Print Screen Reserved Reserved Timer Keyboard Reserved Communications Communications
BIOS Entry
011
011
NMI 011
-
INT
011
PRINT SCREEN
011
011
TIMER INT
KB INT
011
011
011
8088 Software Interrupt Listing (Part 1 of 2)
5-4 System BIOS
Int
D E
F
10 11
12
13 14 15 16 17 18 19 lA lB
1 C 1 D 1 E IF
40
41 5A 5B 60-67
Address 34-37 38-3B 3C-3F 40-43 44-47 48-4B 4c-4F 50-53 54-57 58-5B 5C-5F 60-63 64-67 68-6B 6C-6F 70-73 74-77 78-7B 7C-7F
100-103 104-107 168-16B 16C-16F 180-19F
Name
BIOS Entry
Alternate Printer Diskette Printer Video Equipment Check Memory
Diskette Communications Cassette Keyboard Printer Resident BASIC Bootstrap Time of Day Keyboard Break Timer Tick Video Initialization Diskette Parameters Video Graphics Chars Diskette pointer save area for Fixed Disk Fixed Disk Parameters Cluster Used by Cluster Program Reserved for User
Programs
D11 DISK INT Dll VIDEO 10 EQUIPMENT MEMORY SIZE
DETERMINE DISKETTE 10 RS232 10 CASSETTE 10 KEYBOARD-IO PR INTER To F600:0000 BOOTSTRAP TIME OF DAY DUMMY RETURN DUMMY-RETURN VIDEO-PARMS DISK BASE
o
FD TBl DOOO:XXXX
8088 Software Interrupt Listing (Part 2 of 2)
Note: For BIOS index, see the BIOS Quick Reference on page 5-11 or 5-111.
Vectors with Special Meanings
Interrupt Hex IB - Keyboard Break Address
This vector points to the code to be used when the Ctrl and Break keys are pressed on the keyboard. The vector is invoked while responding to the keyboard interrupt, and control should be returned through an IRET instruction. The power-on routines initialize this vector to an IRET instruction, so that nothing will occur when the Ctrl and Break keys are pressed unless the ~ application program sets a different value.
Control may be retained by this routine, with the following problems. The Break may have occurred during interrupt
System BIOS 5-5
processing, so that one or more End of Interrupt commands must be sent to the 8259 Controller. Also, all I/O devices should be reset in case an operation was underway at that time.
Interrupt Hex 1C - Timer Tick This vector points to the code to be executed on every system-clock tick. This vector is invoked while responding to the timer interrupt, and control should be returned through an IRET instruction. The power-on routines initialize this vector to point to an IRET instruction, so that nothing will occur unless the application modifies the pointer. It is the responsibility of the application to save and restore all registers that will be modified.
Interrupt Hex 1D - Video Parameters This vector points to a data region containing the parameters required for the initialization of the 6845 on the video card. Note that there are four separate tables, and all four must be reproduced if all modes of operation are to be supported. The power-on routines initialize this vector to point to the parameters ~ contained in the ROM video routines.
Interrupt Hex 1E - Diskette Parameters This vector points to a data region containing the parameters required for the diskette drive. The power-on routines initialize the vector to point to the parameters contained in the ROM diskette routine. These default parameters represent the specified values for any IBM drives attached to the system. Changing this parameter block may be necessary to reflect the specifications of the other drives attached.
5-6 System BIOS
Interrupt Hex 1F - Graphics Character Extensions
When operating in the graphics modes of the IBM Color/Graphics Monitor Adapter (320 by 200 or 640 by 200), the read/write character interface forms the character from the ASCII code point, using a set of dot patterns. The dot patterns
r--..... for the first 128 code points are contained in ROM. To access
the second 128 code points, this vector must be established to point at a table of up to 1K bytes, where each code point is represented by eight bytes of graphic information. At power-on, this vector is initialized to 000:0, and it is the responsibility of the user to change this vector if additional code points are required.
Interrupt Hex 40 - Reserved
When an IBM Fixed Disk Adapter is installed, the BIOS routines use interrupt hex 30 to revector the diskette pointer.
Interrupt Hex 41 - Fixed Disk Parameters
~ This vector points to a data region containing the parameters required for the fixed disk drive. The power-on routines initialize the vector to point to the parameters contained in the ROM disk routine. These default parameters represent the specified values for any IBM fixed disk drives attached to the system. Changing this parameter block may be necessary to reflect the specifications of the other fixed disk drives attached.
Other Read/Write Memory Usage
The IBM BIOS routines use 256 bytes of memory from absolute hex 400 to hex 4FF. Locations hex 400 to hex 407 contain the base addresses of any RS-232C cards attached to the system. Locations hex 408 to hex 40F contain the base addresses of the Printer Adapter.
Memory locations hex 300 to hex 3FF are used as a stack area during the power-on initialization, and bootstrap when control is passed to it from power-on. If the user desires the stack in a different area, the area must be set by the application.
System BIOS 5-7
Interrupt Address
Function
20 21 22 23 24 25 26 27 28-3F 40-5F 60-67 68-6F 80-85 86-FO
Fl-FF
80-83 84-87 88-8B 8c-8F 90-93 94-97 98-9B 9C-9F AO-FF 100-17F 180-19F lAO-1BF 200-217 218-3C3
3c4-3FF
DOS program terminate DOS function call DOS terminate address
DOS Ctrl Break exit address DOS fatal error vector DOS absolute disk read
DOS absolute disk write DOS terminate, fix in storage Reserved for DOS
Reserved for BIOS Reserved for user program interrupts Not used Reserved for BASIC Used by BASIC interpreter wh i Ie
BASIC is running
Not used
Hardware, Basic, and DOS Interrupts
Address Mode
Function
400-4Al ROM BIOS See BIOS listing
4A2-4EF
Reserved
4FO-4FF
Reserved as intra-application
communication area for any application
500-5FF
Reserved for DOS and BASIC
500
DOS Print screen status flag store
O=Print screen not active or successful
print screen operation
I=Print screen in progress
255=Error encountered during print
screen operation
504
DOS Single drive mode status byte
510-511 BASIC BASIC's segment address store
512-515 BASIC Clock interrupt vector segment:offset store
516-519 BASIC Break key interrupt vector segment:offset
store
51A-51D BASIC Disk error interrupt vector segment:offset
store
Reserved Memory Locations
5-8 System BIOS
If you do DEF SEG (Default workspace segment):
Offset Length
2E
2 Line number of current line being executed
347
2 Line number of last error
30
2 Offset into segment of start of program text
358
2 Offset into segment of start of variables
(end of program text 1-1)
6A
1 Keyboard buffer contents
O=No characters in buffer
I=Characters in buffer
4E
1 Character color in graphics mode"
" Set to 1, 2, or 3 to get text in colors 1-3.
Do not set to O. The default is 3.
Basic Workspace Variables
Example
100 PRINT PEEK (&H2E) + 256 x PEEK (&H2F)
L
Hex 64
H Hex 00
Starting Address
00000
00080 00400
00500 C8000 FOOOO FEOOO
BIOS interrupt vectors
Available interrupt vectors
BIOS data area
User read/write memory
Disk Adapter
Read only memory
BIOS program area
BIOS Memory Map
BIOS Programming Hints
The BIOS code is invoked through software interrupts. The programmer should not "hard code" BIOS addresses into application programs. The internal workings and absolute addresses within BIOS are subject to change without notice.
If an error is reported by the disk or diskette code, you should reset the drive adapter and retry the operation. A specified number of retries should be required on diskette reads to ensure the problem is not due to motor startup.
System BIOS 5-9
When altering I/O-port bit values, the programmer should change only those bits that are necessary to the current task. Upon completion, the programmer should restore the original environment. Failure to adhere to this practice may be incompatible with present and future applications.
Adapter Cards with System-Accessible ROM Modules
The ROM BIOS provides a facility to integrate adapter cards with on-board ROM code into the system. During the POST, interrupt vectors are established for the BIOS calls. After the default vectors are in place, a scan for additional ROM modules takes place. At this point, a ROM routine on the adapter card may gain control. The routine may establish or intercept interrupt vectors to hook themselves into the system.
The absolute addresses hex C8000 through hex F4000 are scanned in 2K blocks in search of a valid adapter card ROM. A valid ROM is defined as follows:
Byte 0: Byte 1: Byte 2:
Hex 55
HexAA A length indicator representing the number of 512-byte blocks in the ROM (length/512). A checksum is also done to test the integrity of the ROM module. Each byte in the defined ROM is summed modulo hex 100. This sum must be 0 for the module to be deemed valid.
,~
When the POST identifies a valid ROM, it does a far call to byte 3 of the ROM (which should be executable code). The adapter card may now perform its power-on initialization tasks. The feature ROM should return control to the BIOS routines by executing a far return.
5-10 System BIOS
System BIOS Listing - 01/10/86
Quick Reference - 256/640K Board
r'\ Map ....................··..................·· 5-13
Header ........................................ 5-14
EQUATES .................................. 5-15
ABSO ....................................... 5-19
DATA Segment ............................... 5-20
Diskette .····...................··...······..... 5-23
INT 13H .................................... 5-23
Drive Type .................................. 5-25
Diskette 10 1.............................. 5-25
DMA Setup ................................ 5-36
Motor- On .................................. 5-40
Disk Tnt ................................... 5-44
Diskette_Setup .............................. 5-45
Keyboard BIOS ........··........................ 5-46
Scan Tables .................................. 5-56
Printer BIOS ..............·..................... 5-57
RS232 BIOS ··.··...................··.··....... 5-59
Video BIOS ·..····................·····....·.... 5-62
BIOS1 . . . . . . . · · . . . . . . . . . . . . . . · · · · · · · . . . . · · . . .. 5-80
INT 15H .................................... 5-80
Joystick Support .............................. 5-82
POST .......................·................. 5-84
Determine Configuration ....................... 5-87
8259 Test ................................... 5-89
Keyboard Test ................................ 5-90
Expansion Test ............................... 5-91
Boot Strap (INT 19H) ........................ 5-94
Time-of Day (INT lAH) ..................... 5-95
Beep .. :-:-................................... 5-96
System BIOS 5-11
STGTST CNT .............................. 5-97
Disk Base .................................. 5-99
NMI ...................................... 5-100
DDS ...................................... 5-103
Timer Int ................................. 5-103
Character Generator .......................... 5-104
D 11 ....................................... 5-107 Print Screen ................................. 5-108
1"'""""\
5-12 System BIOS
Address
FOOO E729 FOOO 15CC FOOO 6000 FOOO EC5C FOOO 1C4F FOOO E73C FOOO FA6E FOOO FAI2 FOOO 0062 FOOO EFC7 FOOO OBC4 FOOO OBOB FOOO 1037 FOOO 0000 FOOO 0076 FOOO OC57 FOOO FOE4 FOOO FOEC FOOO FOF4 FOOO EF79 FOOO EF66 FOOO EF93 FOOO EFAO FOOO EFAO FOOO EFBA FOOO OA40 FOOO 12BE FOOO FFFO FOOO 1725 FOOO 1585 FOOO 11365 FOOO lBAB Fooo E05B FOOO 0832 FOOO 1344 FOOO 1603 FOOO 1635 FOOO OA64 FOOO 15EE FOOO 15130 FOOO 156C FOOO 14135 FOOO 144E FOOO FOA4 FOOO 1563 FOOO 1614 FOOO ECAO FOOO 176Z FOOO .784 FOOO .676 FOOO 17EI FOOO lB24
Pub 1 I ca by Nallle
AI
ACT DISP PAGE BAsTc -
BEEP
CASSETTE 10 I CONF TBL- -
CRT CHAFI GEN
OOS-
DISKETTE 10 I
01 SK BASE -
01 SK-INT I
DSKETTE SETUP FILL
.,.HEADER
KB INT I
KEYBOARD 10 ·
t.45
-
t.4D TBLI t.4D-TBLZ t.40-TBL3 t.40-TBL4 t.4D-TBL5 t.4D-TBL6
NEe OUTPUT PRINTER 10 I PO R -
READ AC CURRENT READ-CURSOR READ-DOT REAO-LPEN
RESET RESULTS RSZ32 10 1 SCROL[ OOWN SCROLL-UP SEEK
SET COLOR SET-CPOS SET-CTYPE SET-MOOE
VIOEO 10 , VloEO-PAR'MS V 10EO-FlETURN VIDEO-STATE WA ITF-
WR I TE AC CURRENT WR I TE-C CURRENT WRI TE-OOT WRITE-STRING WRITE:TTY
FOOOIOOOO FOOOI006Z FOOOIOA40 FOOOIOA64 FOOOI0832
FOOOI08C4 FOOOIOBOB FOOOIOC57 FOOOIOD18 FOOO,IZBE
FOOOI.344 FOOO,I44E
FOOOl14B5
FOOOIIS63 FOOD II S6C FOOOllSBa FOOOIISB5
FOOOII SCC FOOOIISEE
FOOOl1614 FOOOl1635 FOOOl1603
FOOOI' 725 FOOOII TBZ FOOO II T84 FOOOI I TE. FOOOl1665 FOOOl18H FOOOl1824 FOOOI.8A8 FOOOIIC4F FOOOII03T
FOOOl6000 FOOO IEOSB FOOOIETZ9 FOOOIET3C
FOOO IECSC FOOO IECAO FOOOIEF19
FOOO JEF66 FOOOIEF93 FOOO IEFAO FOOOIEFAo FOOOIEFBA
FOOO sEFC7 FOOOIFOA4 FOOO :FOE4 FOOOIFOEC FOOO IFOF4 FOOOIFAIZ FOOOIFA6E
FOOOIFFFO
HEAOER
~~~K~~i~iJ~0_'
SEEK RESULTS DISK INT ,
OSKETTE SETUP
~~Y~~~R?_IO_'
:~~~~E~OI~_1
VIOEO:IO:I
SET MOOE
V IOEO RETURN
SET CTYPE
SET-CPOS
READ CURSOR ACT 0 I SP PAGE
SET-COLOR
VIDEO STATE
SCROLL UP
SCROLL -DOWN
READ AC CURRENT
WR [TE AC CURRENT
WR I TE-C CURRENT
WRITE-STRING
READ 50T WRITE ~OT
WR I TE-TTY
READ (PEN
CASSETTE 10 I
FILL
-
BASIC RESET AI CONF TBL BEEP
.AITF
NO TBL' NO-TBL2
MO-TBll
~g:i:~:
Mo-TBl6
DISK BASE
.·,·.5 VIDEO PARMS
DDS
~~~:~HAR_GEN
MAP (01/10/86) 5-13
IBM Pe!"'lSonal COMpute!'" MACRO A ......bl.!'" V.!"'.ion 2.00 HEADER --- 01/08/86 POWER ON SELF TEST (POST!
1-1 01-10-86
1
PAGE 118.121
2
TITLE HEADER --- 01/08/86 POWER ON SELF TEST (POST!
··3
6
BIOS I/O INTERFACE
7
a
THESE LISTINGS PROVIDE INTERFACE INFORMATION FOR ACCESSING
9
THE BIOS ROUTINES. THE POWER ON SELF TEST IS INCLUDED.
10
11
THE B I OS ROUTI NES ARE MEANT TO BE ACCESSED THROUGH
12
SOFTWARE INTERRUPTS ONLY.
ANY ADDRESSES PRESENT IN
ll13''
16
THESE LISTINGS ARE INCLUDED ONLY FOR COMPLETENESS,
NOT FOR REFERENCE. APPLICATIONS WHICH REFERENCE ANY ABSOLUTE ADDRESSES WI TH 1N THE CODE SEGMENTS OF B I OS VIOLATE THE STRUCTURE AND DESIGN OF BIOS.
17
10 19
20 21
22
23
MODULE REFERENCE
2'
2.
HEADER .ASM
DEFINITIONS
26
OSEG. INC
DATA SEGMENT LOCATIONS
27
POSTEQU. INC
COMMON EQUATES FOR POST AND BIOS
20
29
DSKETTE. ASM
DISKETTE BIOS
30
DISKETTE 10 , - INT 13M BIOS ENTRY (4QH)
-INT 13H
31
DISK I NT-' - - HARDWARE I NTERRUPT HANDLER -I NT OEH
32
OSKETTE_SETUP - POST SETUP DR I VE TYPES
333.
KEYBRO.ASM
KEYBOARD B I OS
35
KEYBOARD 10 , - INT 16H BIOS ENTRY
-INT 16H
36
KB I NT ,- - - HARDWARE INTERRUPT
-INT Q9H
37
SNO_DATA
- KEYBOARD TRANSMISSION
3a
39
PRT.ASM
PR INTER ADAPTER B I OS
-INT l1H
.'10
RS232.ASM
COMMUNICATIONS BIOS FOR RS232
-INT 14H
42
'3
VIDEO.ASM
VIOEO BIOS
-INT 10H
44
4'
BIOSI.ASM
as INTERRUPT E 5H B I ROUTI NES
-INT 15H I
46
DEV OPEN
- NULL DEV I CE OPEN HANDLER
47
DEV-CLDSE
- NULL DEV I CE CLOSE HANDLER
.490
PROG TERM .JOY STICK
- NULL PROGRAM TERM I NAT I ON - .JOYSTICK PORT HANDLER
.510
SYS-REQ EXT-MEMORY
- NULL SYSTEM REQUEST KEY - EXTENDED MEMORY 5 I ZE DETERM I NE
52
DEVTcE BUSY - NULL DEV I CE BUSY HANDLER
·55·3.
POST .ASM
I NT_COJ;iPLETE - NULL I NTERRUPT COMPLETE HANDLER BIOS I NTERRUPT ROUT I NES
56
POST
- POWER ON SELF TEST, INITIALIZATION I
57
TIME OF DAY I - TIME OF DAY ROUTINES
-INT IAH I
6.50
59
PRINT SCREEijl - PRINT SCREEN ROUTINE
-INT OSH
TIMER-INT I - TIMERI INTERRUPT HANDLER ->INT ICH
DDS -
-
- LOAD 10511 WITH DATA SEGMENT
61
BEEP
- SPEAKER BEEP CONTROL ROUT I NE
62
WAITF
- FIXED TIME WAIT ROUTINE
63
664.
LIST
5-14 HEADER (01/10/86)
.~
IBM p.,..on.t COlllpUt. .... MACRO A......bt.... V.,..ion 2.00
'-2 HEADER --- 01/08/86 POWER ON SELF TEST (POsn
POS TEQU. INC - COMMON EQUATES
01-10-86
...7
.··. ,----------------------------------- ---- ----------------- 70
" , , 72
COOO
· 73
OOFB
· 74
0000
PAGE
e INCLUDE POSTEQU.INC
e ;
-
- ----- -- - -----
e
EQUATES USED BY POST AND BIOS
e ;
e
e SYSTEM
EOU
0
e MODEL BYTE
EOU
OFBH
e SUB MODEL BYTE Eau
OOOH
0 PC-XT. PC-AT
1 SYSTEM MODEL BYTE 1 SYSTEM SUB-MODEL TYPE
75
0001
7 ·
e BIOS LEVEL e ENDIF
EOU
OOIH
I BIOS REVISION LEVEL
71
., ·· 7.
7.
0060
.0
0061
0062
.2
0063
o.
---------------- e
e 1--------- KEYBOARD INTERFACE AND DIAGNOSTIC CONTROL REGISTERS
e PORT A e PORT-B e PORT-C e CMOJS:ORT
EOU EOU
EOU EOU
060H 061H 062H
063H
1 KEYBOARD SCAN CODE/CONTROL PORT 1 PORT S READ/WRITE DIAGNOSTIC REGISTER 1 8255 PORT C ADOR
e
o.
e
05
0060
8.
0061
.,87
'o0.
.0
005. OOEO
OOE 1
." e KB_OATA
e e7L e lD-2A e MC-EO e hlC:EI e
EOU EOU EOU EOU EOU
.OH .,H 05.H 224
22'
1 KEYBOARD SCAN CODE PORT
I CONTROL BITS FOR KEYBOARD SENSE DATA 1 ALTERNATE 2ND I D CHAR FOR KSX I GENERAL MARKER CODE
I PAUSE KEY MARKER CODE
e
..92
9'
·9·.
00F3 OOOC
OOCO 000 1 0002
e RAM PAR ON e RAM-PAR-OFF e PARTTY_ERR e CATE2 e SPKZ
EOU EOU EOU Eau EOU
111100 liB 00001100e IIOOOOOOB
000000018 000000 I OB
AND MASK FOR PAR I TY CHECK ING ENABL.E ON
- OR MASK FOR PARITY CHECKING ENABLE OFF
R/. MEMORY
J 10 CHANNEL PARITY ERROR
TINER 2 I NPUT GATE CLOCK BIT
SPEAKER OUTPUT DATA ENABLE BIT
"9. ··100
0010
oozo
00.0
0080
e REFRESH_S I T e OUlZ e 10 CHECK e PARITY_CHECK
EOU EOU
EOU EOU
000 1OOOOB 00 I OOOOOB 010000008 100000008
REFRESH TEST B' T SPEAKER TIMER OUTz INPUT BIT '/0 (MEMORYI CHECK OCCURRED SIT MASK MEMORY PARITY CHECK OCCURRED BIT MASK
101
e ENDIF
HEADER (01/10/86) 5-15
ISM Person. I Comput.er MACRO Assembler Version 2.00 HEADER -- - 01/ De 16& POWER ON SELF TEST 1POST)
POS TEQU. 1NC - COMMON EQUATE S
1-3 01-10-6&
102
103
10. 0 OOAA
·= 10.
OOFA
10.
OOFE
10'
DOFF
10.
109
110
000 I
"' = 0002
112
0004
II. ·= 113
0006
"'II. 0010 == 0020 = 0040
II."' 0060
119
= 120
0004
121 122
'23
0006
= 00 I 0 == 0020
= 12.
0040
= 12.
0060
12.
· 'I2Z.'
0007
129
130 131 132
133
· 0010
== 01)20 0040
= 0060
13'
13'
13. 137 13.
13'
"0
= 0001 0002
·0 0004
· 0006
,'".3 = 0010
,.2
0020
= 0040
'" = 0060
,.5
I ··
I.'
"'".150
OOAB 0041 0036 0010
151
003A
"2
0053
......,.3
15. ,.5
157
0052
OOZA 0045 003& 004& 0054
I ··
0051
,.0
0056
C PAGE
C ; ---------- KEYBOARD RESPONSE ---- - - ---- -------------------------- - ------------
C KB OK
EQU
OAAH
I RESPONSE FROM SELF DIAGNOSTIC
C t<:B-ACK
EQU
OFAH
I ACKNOWLEDGE FROM TRANSMISSION
C KB-RESEND
EQU
OFEH
I RESEND REQUEST
C KS:OVER_RUN
EQU
OFFH
I OYER RUN SCAN CODE
C
C ;---------- FLAG EQUATES WITHIN eKB FLAG -------------------------------------
C RIGHT SHIFT
EQU
OOOOOOOIB -
1 RIGHT SHIFT KEY DEPRESSED
C LEFT SHIFT
EQU
000000108
I LEFT SHIFT KEY DEPRESSED
C CTl SHIFT
EQU
00000 I DaB
I CONTROL SHIFT KEY DEPRESSED
C ALT-SHIFT
EQU
000010008
I ALTERNATE SHIFT KEY DEPRESSED
C SCROLL STATE
EQU
0001 000 DB
I SCROLL LOCK STATE HAS 8EEN TOGGLED
C NUM STATE
EQU
00 I 000008
, NUM LOCK STATE HAS SEEN TOGGLED
C CAPS STATE
EQU
01000000B
I CAPS LOCK SlATE HAS 8EEN TOGGLED
C INS_STATE
EQU
10000000B
I INSERT STATE IS ACTIYE
C
C ;---------- FLAG EQUATES WITHIN eK8 FLAG 1 -----------------------------------
C SYS SHIFT
EQU
000001008 -
-SYSTEM KEY DEPRESSED AND HELD
C HOLD STATE
EQU
000010008
SUSPEND KEY HAS 8EEN TOGGLED
C SCROLL SHIFT
EQU
000100008
; SCROLL LOCK KEY IS DEPRESSED
C NUM SHTFT C CAP~ SH I FT
EQU EQU
00 100000B 0 I 0000008
I NUM LOCK KEY I S DEPRESSED , CAPS LOCK KEY I S DEPRESSED
C INS_SHIFT
EQU
100000008
I INSERT KEY IS DEPRESSED
C
C
FLAGS EQUATES WITHIN eKB FLAG 2 ----------------------------------
C
g ~8 FA
C KB-FE
EQU EQU EQU EQU
000001118 00001 OOOB 000 I 00008 001000008
- I KEYBOARD LED STATE BITS ; RESER YEO (MUST 8E ZERO) I ACKNOWLEDGMENT RECE I YEO I RESENO RECEIVED FLAG
C K8-PR LEO
EQU
010000008
I MODE INDICATOR UPDATE
C KB:ERR
EQU
100000008
; KEY80ARD TRANSM I T ERROR FLAG
C C 1---------- FLAGS EQUATES WITHIN eKB FLAG 3 ---------------.------------------
C LC E 1
EQU
00000001 B - 1 [AST CODE .AS THE E 1 HIDDEN CODE
C LC-EO
EQU
000000' OB
, LAST CODE WAS THE EO HI DDEN CODE
C R eTL SHIFT C GRAPH-ON
EQU EQU
000001009 000010008
I RIGHT CTL KEY DOWN
: ALL GRAPHICS KEY DOWN {W.T. ONLY)
C C
~8X
-
EQU EQU
OOO! 1000B 000 I 00009
; RESERYED (MUST BE ZERO! I KBX INSTALLED
C SET NUM LK C LC A8 -
EQU EQU
00 1000008 010000008
I FOR.CE NUM LOCK I F READ I D AND K8X ; LAST CHARACTER WAS FIRST I D CHARACTER
C RD:ID
EQU
10000000B
I DOING A READ 10 IMUST 8E 8ITO)
C
C ; ---------- KEY80ARD SCAN CODES ------------------------- ----------------------
C 10 I
EQU
OA8H
1ST 10 CHARACTER FOR K8X
C 10-2
EQU
041 H
2ND 10 CHARACTER FOR KBX
C AL'f KEY
EQU
5&
SCAN CODE FOR ALTERNATE SHIFT KEY
C CTL-KEY
EQU
29
SCAN CODE FOR CONTROL KEY
C CAPS KEY
EQU
58
SCAN CODE FOR SH I FT LOCK KEY
C DEL KEY
EQU
83
SCAN CODE FOR DELETE KEY
C INS-KEY
EQU
82
SCAN CODE FOR INSERT KEY
C LEFT KEY
EQU
<!-2
SCAN CODE FOR LEFT SH I FT
C NUM KEY
EQU
69
SCAN CODE FOR NUMBER LOCK KEY
C RIGHT KEY
EQU
54
SCAN CODE FOR RIGHT SHIFT
C SCROLL KEY
EQU
10
SCAN CODE FOR SCROLL LOCK KEY
C SYS KEY
EQU
64
SCAN CODE FOR SYSTEM KEY
C FI'-M
EQU
87
I Fll KEY MAKE
C F12:M
EQU
66
I F 12 KEY MAKE
5-16 HEADER (01/10/86)
~ ~
IBM P.raonal Co",pyt.r MACRO A···",bl.r V.ralon 2.00 HEADER --- OI/OB/Sb POWER ON SELF TEST (POST)
1-'
01-10-86
,.,
POSTEQU.INC - CONMON EQUATES C PAGE
,.2
C ENDIF
I.'
C
I ··
C t ~ ~ ~ ~ ------ 01 SKEllE EQUATES ---- -------- ------ - - ---- - - -------------- ---- -----
I ··
0050
C CARD 10
EQU
010100008
CONTROLLER CARD I.D. BIT
I ··
0001
C OUAL-
EOU
000000018
MASK FOR FDC ADAPTER 1.0.
,.7
0080
C INT FLAG
EOU
100000008
INTERRUPT OCCURRENCE FLAG
,.8
ODeD
C DSK-CHG
EOU
100000008
DISKETTE CHANGE FLAG MASK 81T
I ··
0010
C DETERMINED
EOU
OOOIOOOOB
SET STATE DETERMINED IN STATE BITS
170
0010
C HONE
EOU
0001 OOOOB
TRACK 0 MASK
171
0004
C SENSE DRV ST
EOU
OOOOOIOOB
SENSE DRIVE STATUS COMMAND
172
0030
C TRK SLAP -
EQU
030H
CRASH STOP (48 TPI DRIVES)
173
0001.
C QU 1ET SEEK
EQU
OOAH
SEEK TO TRACK I Q
17.
0002
C MAX O"V
EQU
2
MAX NUMBER OF OR I YES
17' ~ OOOF
17.
0014
C HOl2 SETTLE
EQU
IS
C HD320 SETTLE
EQU
20
1.2 M HEAD SETTLE TIME 320 K HEAD SETTLE TIME
177
0025
C MOTOR::::WA I T
EQU
31
2 SECONDS OF caUNTS FOR MOTOR TURN OFF
178
C
17.
180
0080
181
0040
C ,----- ----- DISKETTE ERRORS ------------ --------------------.----------------.
C C
~!:=s~~~
~: g!g~
: ;~~~C=:T~~L~~I~~DRESPOND
18'
0020
C 8AD-NEC
EOU
020H
I DISKETTE CONTROLLER HAS FAILED
I.'
0010
I ··
OOOC
18.
0009
I ··
0008
,.7
0006
I ·· = 0004
C BAO-CRC
EOU
0 I OH
C C
~~~:::::~N~~~Y
~~~
gg~~
C C
:~g~~~HANGE
~~~
gg:~
C RECORD NOT FND EOU
004H
I BAD CRC ON 01 SKETTE READ
: ~~~~~~y~~ ~~~N~CROSS 64K BOUNDARY : :~I~V~~:~~EgNo~P~~:~I~~TACH CARD
I REQUESTED SECTOR NOT FOUND
I ··
0003
,.,"0 = 0002 0001
C WRITE J5ROTECl C BAD ADOft MARK C BAO:CMD -
EQU EQU EOU
003H 002H OOIH
I WRITE ATTEWPTED ON WRITE PROTECT DISK I ADDRESS MARK NOT FOUND I BAD COMMAND PASSED TO DISKETTE 110
192
C
193
= 194
0001
C ;---------- DISK CHANGE LINE EQUATES ------------------------------------------
C NDCHGLN
EQIJ
OOIH
I NO DISK CHANGE LINE AVAILABLE
'"I · ·
0002
".,.7
I ··
000 1 0002
200 · 0004
20 I
0010
C CHGLN
EOU
002H
I DISK CHANGE LINE AVAILABLE
C
C 1---------- !lEOlA/DRIVE STATE INDICATORS --------------------------------------
C TRK C"'PA
EQU
OOOOOOOIB
I 80 TRACK CAPABILITY
C FMT·CAPA
C C
~~~::i
EQU
OOOOOOIOB
~~~ ggg~g~gg:
I MULTIPLE FORMAT CAP"'BILITY (1.2104)
: ~~~i~ g~i~=::~~g BIT
202
0020
C DBL STEP
EOU
00 I OOOOOB
I DOUBLE STEP BIT
20.
OOCO
C RATE Io4SK
EOU
IIOOOOOOB
I MASK FOR CLE...RINCI ALL BUT RATE
20.
0000
C RATE:SOO
EQU
OOOOOOOOB
I SOO KBS DATA RATE
20.
0040
C RATE_300
EQU
0 I OOOOOOB
I 300 KBS DATA RATE
'0.
0080
C RATE 250
EQU
10000000B
I 250 KBS OAT... RATE
207
OOOC
C STRT-MSK
EQU
OOOOIIOOB
I OPERATION START RATE Io4ASK
20.
OOCO
C SEND:Io4SK
EOU
IIOOOOOOB
I MASK FOR SEND RATE BITS
20.
C
210
C : - - - - - - - - - - lEOlA/DRIVE STATE INDICATORS COMPATIBILITY --------~----------------
211
0000
C M3D3U
EQU
OOOOOOOOB
I 360 MEDIA/DRIVE NOT ESTABLISHED
"2
0001
C M3DIU
EQU
OOOOOOOIB
1 360 MEOI .... I · .20RIVE NOT ESTABLISHED
213
0002
C MIDIU
EQU
OOOOOOIOB
I 1.2 MEDIAlDFUVE NOT ESTABLISI-ED
2 I.
0001
C hlED.UNK
EQU
00000 I I IB
I NONE OF TI-£ ABOVE
HEADER (01/10/86) 5-17
IBM Personal Computer MACAO Aaa.mble... V.rslon 2.00 HEADER --- 01/08/86 POWER ON SELF TEST (POST)
POSTEQU.INC - COMMON EQUATES
1-5 01-10-B6
215
21' 217 21.
0 0020 0 0020
2"
OOZl
220
00,1,0
22. 0 00,1,1 222 0 OOTO
223
0010
22.
225 22. 227
0 0008 0 0000 0 0000
22. 0 OOCO
22'
= 230
231-
0040 0043
232
0040
. 233
23.
23.
0080
23. 237 23.
23' 0 000 I
2.0
0002
2"
0004
. 2'2
2'3 2"
0 OOOB 0 0010
0020
2'5
0040
2"
OOBO
247
2'.
2" 250 251
0 0061 0 OOBF
252 253
25' 255
25. 257 25.
2.' 2.0
0 0000 0 BODO 0 0030
= 0100
2" 2.2 2.3 2··
2.5 2··
0000 000,1,
0006
261 2·· 2·· 270 271
000 I 0100
0101
e PAGE
e 1-- ----- - - - I NTERRUPT EQUATES ---- - ------------ -- ----- ---- - - --------- - --------
C EOI
EQU
020H
I END OF INTERRUPT COMMANO TO 6259
C INTAOO
EQU
020H
; 6259 PORT
C INTAOI
Eeu
OZIH
t 6259 PORT
C INTBOO
EQU
OAOH
2NO 8259
C INTBOI
EQU
OA1H
C INT TYPE
EQU
OTOH
START OF 6259 INTERRUPT TABLE LOCATION
C C
;(N--T=-V-I-D-E-O---------EQ--U------O-lO--H----- ----- ---I -V--ID-E-O-- V-E-C-T-O-R----------- -- ------- --- ---
C DMAOS
EQU
006H
I DMA STATUS REGISTER PORT ADDRESS
C DMA
EQU
OOOH
I DMA CH.O ADDRESS REGISTER PORT ADDRESS
C DMAI8
EQU
ODOH
I 2ND OMA STATUS PORT ADDRESS
C DMA!
Eeu
C 1------ ---------- - - -
oeOH
1 2ND oMA CH.O ADDRESS RECIISTER ADDRESS
- - --------- ------ ----- - -------- - - --- - - - -------- - -------
C TI MER
EQU
040H
I B253 T I MER - BASE ADDRESS
C TIM CTL
EQU
043H
I 8253 TIMER CONTROL PORT ADDR
C TlMERO
EQU
040H
I 8253 TlMER/CNTER 0 PORT ADoR
C
C i --------- NANUFACTUR I NG PORT - - - ------------- -------- -- --- ----------- -- -------
C MFG_PORT
EQU
BOH
I MANUFACTURINCI AND POST CHECKPOINT PORT
C
; oMA CHANNEL 0 PAGE REGISTER ADDRESS
C
C
MANUFACTURING 81T DEFINITION FOR OMFG ERR FLACI+I -------------------
C MEM FAIL
e PRO-FAIL
EQU EQU
000000018 000000108
I STORAGE TEST FAILED I VIRTUAL MODE TEST FAILED
,ERROR 20X) (ERROR 104)
C LMCS FAIL
EQU
000001008
I LOW MEG CHIP SELECT FAILED (ERROR (09)
C KYCLK FAIL
EQU
000010008
I KEY80ARO CLOCK TEST FAILED (ERROR 304)
C KY SYS FAIL
EQU
00010000B
; KEYBOARD OR SYSTEM FAILED (ERROR 303)
C KYBD FAIL
EQU
00100000B
: KEYBOARD FAILED
(ERROR 301)
C DSK FAIL
EQU
010000008
DISKETTE TEST FAILED
(ERROR (01)
C KEY::::FAIL
EQU
'00000008
KEY80ARD LOCKED
(ERROR 302)
C
C t,;.;-;~~~ --------~;~-----~~ ~ ~------------~ ; -;~ ;;-~;-~~;-; ;~~- ;~~ ~ ~~~;~- ---------
C
C LAST_DMA_PACIE EQU
OBFH
; LA5T DMA PACIE REGISTER
; - C
C C
;;;;-- --- - - - -- -- ~~~-- - - - ~;~~---- - ----- -- ~ -;;~~ - ------- ~~;~~~~~~;; -~~~~~;~ ;~~~
C
C ~;~~ -~~- - - - - - - --~~~--- --~~~~~~----
C
e POST-SP
EQU
OBOOOH
; POST STACK SEGMENT I POST STACK POINTER
C STACK SS C TOS -
EQU EQU
30H I DOH
I STACK SECIMENT USED OUR I NCI POST ; STACK -- USED OUR ING POST ONLY
C
I USE WILL OVERLAY INTERRUPTS VECTORS
C
- ------ --- ---- C
C ~~ - - - - - - - - - - - - - - ~~~ --- - ~~ ~~~---
-
- - - ~~;;~ ;;~ ;~;~~~-~~;~;~~~;
- --- --
C
C LF
EQU
OOOAH
LINE FEED CHARACTER
C RVRT
EQU
000010009
VIDEO VERTICAL RETRACE BIT
C RHRZ
EQU
000000018
VIDEO HORIZONTAL RETRACE 81T
C H
EQU
25&
HIGH 8YTE FACTOR lX 100H)
C X
EQU
HIClH AND LOW BYTE FACTOR IX 10lHI
.LIST
5-18 HEADER (01/10/86)
~\
IBM P""sonal Compute .. MACRO Assembl... Yel"'lIion 2.00 HEADER --- 01/08/86 POWER ON SELF TEST (POST)
DSEG. INC - DATA SEGMENTS
1-.
01-10-86
272 273
274 275 276 277 278 27. 280
281 282
283 284 285 286 287
288
289
2'0 29 I 292 2'3 294
295
2 ··
297 298
2" 300
301 302
303 304 305
306
30T 308 309 310 311 312 313
31. 315 316 317 318
319 320 321 322 323
324 325 32. 32T 328 329 330 331 332 333 334 335 33. 33T
0000
OOOO??
0008 0008?? 17 1 1 1")
0014 0014 171717"
0020 0020 1711171?
0040 0040 1??77771
OO"'C 004C 17 1 17 171
0060 0060 17111111
0074 00T4 7717'1777
DOTe 00T8 1171111?
OOTC OOTC 11711111
0100 0100
0104 0104 77777777
OJ 18 0118 n117771
OICO OICO 177177?7
0 I 08 0108 111111?1
0400 0400 0400
0500 0500
TCOO TCOO
TeOO
PAGE
C INCLUDE OSEG. INC
C C
ELSE
: - --
-
--
-------------------
----
--
----
--
-
-
C
8088 INTERRUPT LOCAT IONS
C C
; ;
-
-
-
-
-
-
-
--- -RE-F-ERE
N-C--ED-
-
BY
--
-
P
-
OST
-- -
--&-8--I -O-S-------
~
C ENDIF
C C A8S0
SEGMENT AT 0
I ADDRESS", ooooJoobo
C
C
08
I START OF INTERRUPT VECTOR TABLE
C
C
ORO
C
00
I NON-MASKA8LE INTERRUPT VECTOR
C
C
ORO
C
00
PR I NT SCREEN I NTERRUPT VECTOR
C
C
ORO
C
00
, HARDWARE I NTERRUPT PO INTER t 8-F I
C C C ClVIDEO_INT
ORO DO
,.. ·0 I OH
I Y IDEO I /0 INTERRUPT VECTOR
C
C
ORO
C ClORG_ VECTOR
00
I DISKETTE/DISK INTERRUPT VECTOR
C
C
ORO
C
00
POINTER TO CASSETTE BASIC
C
C
ORO
C
00
I POINTER TO VIDEO PARAMETERS
C
C
ORO
C
00
1 POINTER TO DISKETTE PARAMETER TABLE
C
C
ORO
C
00
C
I POINTER TO GRAPHIC CHARACTERS IZ8-Ze!5
C
ORe
C
00
, PO I NTER TO DISKETTE I NTERRUPT CODE
C
C
ORO
C
00
I POINTER TO FIRST DISK PARAMETER TABLE
C
C
ORO
C
00
I POINTER TO SECOND DISK PARAMETER TABLE
C
C
ORO
C
00
I POINTER TO SLAYE INTERRUPT HANDLER
C
C
ORO
C ClHDISK_INT
00
I PO I NTER TO F I XED 0 I SK I NTERRUPT CODE
C
C
ORO
C DATA AREA
"'OOH LABEL
BYTE
I ABSOLUTE LOCAT I ON OF DA T A SEGMENT
C DATA::WORD
LA8EL WORD
C
C C
"R ORO
LABEL
0500H
I LOAD LOCATION FOR MANUFACTURING TESTS
C
C
ORO
TCOOH
C ClaOOT_LOCN
LABEL FAR
I BOOT STRAP CODE LOAD LOCATION
C
C ASSO
ENDS
HEADER (01/10/86) 5-19
IBM 1='.,..on.1 COlllput.,. MACRO Ass.mbl.,. v.,.s,on 2.00 HEADER --- 01 foe/86 POWER ON SEL.F TEST (POST)
DSEG.INC - DATA SEGMENTS
1-1 01-10-86
338 33. 340 341 342 343 .44 345
34. 341 348
34.
350 351 352 353 354 355
35. 351 358
35' 3.0
3.' 3.2
3.3 3.4 3.5 3 ··
3.' 3 ··
3.' 310 311 312
313 314 315 31. 311 318 31. 380 381
.82 38.
3'4 385
3·· 381 38. 3··
3.0
3" 3'2 3.3 3.4
3'5 3'. 3.' 3" 3" 400 401 402
40. 404 405 40.
401 408
40' 410 411 412
413 414 415 41. 411 418
41' 420 421 422 42. 424
425 42. 421 42.
42' 4.0 431 432 433 434
4'5
4'. 431
43. 43. 440 441 442
0000 0000 0000 ?171 0002 ??1? 0004 1? ?? 0006 ?711 0008 1111 OOOA 1111 OOOC ???? aOOE ???? 0010 1?11 0012 ?1 0013 111? 00 IS 11 0016 ??
0017 1? 00 18 11 0019 11 OOIA ????
OOIC ????
OOIE 10
003E 11
003F 11
00-40 11 0041 0042 01
00-49 11 00-4A ~11? 00-4C ?111
O. 004£ 1?1?
OO~O
OObO 1??1 00b2 11 0063 ????
" 0065
0066 11
0067 1111 00b9 ???1 OObB 11
OObC 1111 006E 1111 0070 ?1
0011 1? 0012 ?1??
007-4 0015 0076 0017
1111 1? 1??1
- C
C
- PAGE
; -
-
-----
--
-
---
---
-
-
----- -
C ;
ROM BIOS DATA AREAS
l
C 1-- ----------- ------ - -- ---- - ----- C
C DATA
SEGMENT AT 40H
I ADDRESS: 00-4010000
C DATA40 C ORS232_BASE
LABEL. OW
BYTE 1
BASE ADDRESSES .OF RS232 ADAPTERS
C
DW
SECOND LOG I CAL. RS232 ADAPTER
C
DW
RESERVED
C
DW
RESERVED
C OPR INTER_BASE DW
BASE ADDRESSES OF PRINTER ADAPTERS
C
DW
SECOND LOGICAL. PRINTER ADAPTER
C
DW
THIRD L.OGICAL. PRINTER ADAPTER
C
DW
RESERVED
C "EQUIP FLAG
DW
INSTAL.L.ED HARDWARE FL.AGS
C "MFG TST
DB
C "MEMORY SIZE
DW
I NIT I AL I ZAT I ON FLAGS BASE MEMORY SIZE IN K BYTES IX 10241
C OMFG_ERR_FL.AG DB
C
DB
SCRATCHPAD FOR MANUFACTUR INC ERROR CODES
C C
; ------- - -- ----- - - ------------ ----- --
C C
,;-- ------K-E-Y-B_OA.R-D--D-A-T-A.--AR-E-A-S--------------I
C
C OKe FLAG
DB
C OKB-FLAG 1
DB
C OAL.'f INPUT
DB
I KEYBOARD SHIFT STATE AND STATUS FLAGS I SECOND BYTE OF KEYBOARD STATUS I STORAGE FOR AL.TERNATE KEY PAD ENTRY
C "BUFFER HEAO
DW
C "BUFFER::TAIL
DW
I PO I NTER TO HEAD OF KEYBOARD BUFFER I POINTER TO TAIL. OF KEYBOARD BUFFER
C C 1-----
= HEAD TAIL
INDICATES THAT THE BUFFER I S EMPTY
C
C
DW
16 DUP( 1)
I ROOM FOR 15 SCAN CODE ENTRIES
C
C
C C 1- - - - - - --- - - - - - - - -. - - - ---. -_. - - - - - --
C ;
DISKETTE DATA AREAS
t
C
C
C .SEEK_STATUS
DB
C
C
= DRIVE RECALIBRATION STATUS
BIT 3-0 DRIVE 3-0 RECALIBRATION BEFORE NEXT SEEK IF BJ TIS · 0
C IIMOTOR_STATUS DB
C
C
C OMOTOR COUNT
DB
MOTOR STATUS
= BIT 3-0 DRIVE 3-0 CURRENTL.Y RUNNINC BIT 7 = CURRENT OPERATION IS A WRITE
TIME OUT COUNTER FOR MDTORiS) TURN OFF
C OoSKETTE_STATUS DB
C
C
DB
7 DUPI?)
I RETURN CODE STATUS BYTE I CMD BLOCK IN STACK FOR DISK OPERATION I STATUS BYTES FROM DISKETTE OPERATION
C
C
C
C
C = - - - - - - - - - ~ - - - - - - - -- - - - - - -_. - - -- --.
C C
; ;
--
--
V--ID-E-O-D--ISP-L-A-Y-D-A- T- A-A--RE- A-------1
C
C .CRT MOOE
DB
C .CRT-COLS
DW
C OCRT-LEN
DW
C "CRT-START
DW
C "CURSOR_POSN
DW
? 1
? & OUPI?I
I CURRENT DISPLAY MODE (TYPE) I NUMBER OF COLUMNS ON SCREEN I L.ENGTH OF REGEN BUFFER IN BYTES
I START I NG ADDRESS I N REGEN BUFFER I CURSOR FOR EACH OF UP TO e PAGES
C
C
C
C .CURSOR MOOE
DW
CURRENT CURSOR MODE SETTING
C .A.CT I VE-PAGE
DB
C IIADDR 6i45
DW
C .CRT MODE SET DB
C OCRT::PALE'hE
DB
CURRENT PAGE BEING DISPLAYED BASE ADORESS FOR ACTIVE DISPLAY CARD CURRENT SET1ING OF THE 3X8 REGISTER CURRENT PALETTE SETTING - COLOR CARD
C
C
C C
; ;
-
-----
POST
- --
-A--N-D-
-BIOS
--
W--O-RK--D--A-T-A--A-R-E-A----
C
C
I STACK SAVE, ETC.
C "10 ROM IN IT
DW
C .IO-RmCSEG
DW
C 01 NTR_FLAG
DB
, POINTER TO ROM INITIALIZATION ROUTINE
I POINTER TO 1/0 ROM SEGMENT I FLAG INDICA.TING AN INTERRUPT HAPPENEO
C C
,------ --- ----- - - - -------- -- --------
C C
; ;
-
-
--
-T-I_M.E-R-
-
DA- T-A--
-A-RE-A-
-
---
--------,
C
C .TIMER L.OW
DW
I L.OW WORD OF T I MER COUNT
C .TlMER-H I GH
DW
I HIGH WORD OF TI MER COUNT
C OT IMER=OFL.
DB
I TIMER HAS ROLLED OVER SINCE L.AST READ
-- C
C
; - - - ---- -- - - -- ----------------
C C
; ;
-
-
-
-
-
--
SYSTEM
------
D- -ATA--AR-EA--
---
-
-
-
-
-
-
--I
C
C OS I as BREAK
DB
C .RESET_FL.AG
DW
I BIT 1=1 IF BREAK KEY HAS BEEN PRESSED 1 WORD=1234H IF KEYBOARD RESET UNDERWAY
C
C 1 - - - - - - - - - - - - - - - - - - - - - -- - - - - - - -.-
C ;
FIXED DISK DATA AREAS
I
C
C
C ODISK STATUS I DB
C IIHF NUM
DB
I FIXED DISK STATUS I COUNT OF FIXED DISK DRIVES
C IICONTROL BYTE DB
C "PORT_OF~
DB
I HEAD CONTROL BYTE I RESERVED I PORT OFFSET)
5-20 HEADER (01/10/86)
"...-...,
IBM Personal Computer MACRO Assembler Version 2.00 HEADER --- 01/06166 POWER ON SELF TEST IPOST)
DSECi. [NC - DATA SEGMENTS
4<3
4<4
445
44.
..,441
446 449
'5'
0076 17 0079 ??
" OOTA
001B ??
··2 001C ??
,···.·····,·"3
0010 11 001E 11
001F 11
···
459
4.0
4.,
4.2 0060 ????
..,'.3
4 ·· 4.5 4 ··
0082 ????
'.8 ,.9
.7. .71
'7, '73 .7. 475
" 008.
0085 1111 0081 ,? 0088 11 0089 1" 008A 11
'7. '77 418
419
46'
'61 462 463 484 465
'6.
'87 .88 ··9 .9. .91
492
0088
" 008C " 0080 11
006E ??
008F '? 0090 17
" 0091
0092 11
0093 11 0094 1 ?
" 0095
.93
.9.
.95
'9. 0096 ?1 .97 0097
496
499
500
501
502
503
5.4 5.5 5 ··
0098 ??
009A 11 009C 11
·· 7 009E ?? 5'. OOAO ? , 509
510
511
...
..51,13.2
. . 5 OOA I
.7 I
??
511
516
519
520
52' 522
...
523 00A8 ?1171???
52' 525
.27
'2.
....",."..
'29
OOCE OOCE ????
534
535
53.
531 0100
536
539 0100 '?
5'0
5" 542 0101
5'3
5"
C PAGE
C
C C
; ;
--
--
-
-
-T-I-M-E---O-U-T---V-A-R-IA--B-L-E-S---
-
-
---
--
----
C
C ClPRINT_TIM_OUT DB
C
DB
T [ME OUT COUNTERS FOR PR I NTER RESPONSE SECOND LOG I CAL PR (NTER ADAPTER
C
DB
THIRD LOGICAL. PRINTER ADAPTER
C
DB
RESERVED
C
DB
TIME OUT COUNTERS FOR RS232 RESPONSE
C
DB
SECOND LOG I CAL. RS232 ADAPTER
C
DB
RESERVED
C
DB
RESERVED
C C
; ---- -- - - -- ----- - - --- -- - - - -- - - ----------
C I
ADDITIONAL KEYBOARD DATA AREA I
C
C
C
, BUFFER LOCAT 1ON WITH I N SEGMENT o40H
C ClBUFFER START OW
I OFFSET OF KEYBOARD BUFFER START
C ClBUFFER:END
OW
I OFFSET OF ENO OF BUFFER
C C
; ---------- ---------- -------- -----------
C ;
EGA/PGA DISPLAY WORK AREA
C
C
C "ROWS
DB
I ROWS ON THE ACT I VE SCREEN I LESS ')
C "POINTS
OW
; BYTES PER CHARACTER
C .INFO
DB
I MODE OPTIONS
C "INFO_3
DB
; FEATURE BIT SWiTCI-ES
C
DB
; RESERVED FOR D I SPL.AY ADAPTERS
C
DB
I RESERVED FOR DISPLAY ADAPTERS
C C
; --- - - ---------- --- - - - ------------------
C ;
ADDITIONAL MEDIA OAT"
C
C
C .L.ASTRATE
DB
L.AST DISKETTE DATA RATE SELECTED
C ClHF STATUS
DB
C ClHF-ERROR
DB
STATUS REGISTER ERROR REGISTER
C ClHF-INT FL.AG
DB
C ClHF-CNTRL.
DB
F I XED DISK INTERRUPT FL.AG B (T 0-> PC-' I DUAL FDC ADAPTER CARD
C ClOSK_STATE
DB
DRIVE a MEDIA STATE
C
DB
ORIVE , MEDIA STATE
C
DB
DRIVE 0 OPERATION START STATE
C
DB
DRIVE' OPERATION START STATE
C "OSK_TRK
DB
OR I VE a PRESENT CYL I NDER
C
DB
DR I VE 1 PRESENT CYL I NDER
- C
C
;--- ------------ ------ - - - ------------- -
C C
1; -------A-D-D--IT-I-O-N-A-L-.--K-E-YB-O-A--R-D-F-L-A-G-S-------- I
C
C ClKe FLAG 3
DB
I KEYBOARD MODE STATE AND TYPE FLAGS
c ClKB:FLAG:2
DB
I KEYBOARD L.ED FL.AG 5
c
c c
;(F-E---S-Y-S-TE-M- - - - ---------------- - ----------
c ;
REAL. T (ME CLOCK DATA AREA
c
c
c ClUSER FL.AG
OW
I OFFSET ADDRESS OF USERS WA I T FLAG
c .USER-FLAG SEG OW
I SEGMENT ADDRESS O~ USER .... I T FLAG
c ClRTC [OW -
OW
; LOW WORD OF USER WAIT FLAG
c ClRTC-H I GH
DW
I HIGH WORD OF USER WAIT FLAG
c ORTC-WA I T FLAG DB
I WA I T ACT I VE FLAG (0 I_BUSY. eO_POSTED I
c ENDIF
c c
; ----------- - - - -- -- - - - - -- - -- -------------I
(aO.POST ACKNOWLEOGED)
-- c
c
I ;
-
------A-R-E--A
--FOR
--
-
---- NETWORK
-- -
-
A-D- -AP--T-ER---
---- 1
c
c
DB
1 DUP1?l
I RESERVED FOR NETWORK ADAPTERS
c
c
c
c ;---
c ;
EGA/PGA PAL.ETTE POINTER
c
c
c
DO
; PO I NTER TO EGA PARAMETER CONTROL. BLOCK
c c
1-------------- ---- ---- -----------------
- - - c
c
I ;
----
-
--TI-M-E-R-
-D--AT-A-------
-------
-- -- -- -
1
c
c c
ORG OW
,aCEH
I COUNT OF DAYS FROM 1-1-80
c
c c
; ----- - ------------------------- --_.--- - I RESERVED
c I
DATA AREA - PRINT SCREEN
c
c
c
ORG
100H
I ADDRESS_ 004a I 0 I 00
(REF 0050 I 0000 I
c
c
DB
PRINT SCREEN STATUS BYTE
c
OO.READY I OK. a 1 "BUSY. FF",ERROR
c
c DATA
ENDS
;
END OF BIOS DATA SEGMENT
.L.IST
HEADER (01/10/86) 5-21
IBM p.,..onel COMput.,. ..ACRO AslI ....bl.,. V.,..ion 2.00 HEADER --- 01/08/86 POWER ON SELF' TEST !POSTl
,-.
0'-10-86
545
540 0000 541
54. 549 SSO
PAGE CODE
SEGMENT WORD PUBL I C PUBL IC HEADER ASSUME CStCOOE.OS lNOTH I NG.E5 :NOTH ING. SS I NOTH I NG
'5'
······552 0000
HEADER PRDC
,. 0000
BEGIN
555 0000 36 32 58 30 38 35
EQU 08
550 551
sse SS.
.34 20 43 4F' 50 52
2E 20 49 42 40 ZO 43 41=' 52 50 2E ZO
39 38 3' 2C 31
500
39 38 36 20
50'
EVEN
.···56····3···2
0022 20 ZO 20 20 20 20 20 20 20 20 20 20 20 20 20 20 ZO 20
20 20 20 20 20 0039 20 20 20 20 20 20
08 DB
5.,
20 20 20 20 20 20
NEAR
S · 62X0854 COPR. IBM CORP. 1981.1986
'0.
50' 510 511
512
20 20 20 20 20 20 ZO 20 20 20 20
0050 0050
HEADER CODE
ENDP ENDS
513
END
ICOPYRIGHT NOTICE
I EVEN BOUNDARY IPAC IPAD
r"'\
5-22 HEADER (01/10/86)
IBM Personal Computer MACRO Assembler VersIon 2.00 DSKETTE -- 01/10/66 DISKETTE ADAPTER BIDS
,-,
01-10-66
. ,
2 3
5 6 1
·6
,.10
II '2 '3
'5 '6
,.11
'6
20 2' 22
223.
25 26 21 26 2' 30 3' 32 33 3' 35 36 31
36
...,.30'
'2 '3
PAGE 116,121 TITLE DSKETTE - - 01 110166 0 I SKETTE ADAPTER B I OS .LIST ; -- I NT 13 ------------------------------------------------------------------
01 SKETTE I/O THIS INTERFACE PROVIDES DISK ACCESS TO THE 5.25 INCH 360 KB,
; INPUT 1.2MB, AND 120 KB 60 TRACK DISKETTE DRIVES.
(AH) 20 RESET 0 I SKETTE SYSTEM
HARD RESET TO NEC, PREPARE COMMAND, RECALIBRATE REQUIRED
;---------------O-N--A--LL--D-R--I -VE-S--
------------------------------------------------
;
(AH) = 1 READ THE STATUS OF THE SYSTEM INTO (AH)
;
llDISKETTE_STATUS FROM LAST OPERATION IS USED
REGISTERS FOR READ/WRITE/VERIFY/FDRMAT
(DL) - DR I VE NUMBER (0 - I ALLOWED, VALUE CHECKED)
(DH) - HEAD NUMBER (0-1 ALLOWED, NOT VALUE CHECKED)
(CH) - TRACK NUMBER (NOT VALUE CHECKED)
MED I A
DR I VE
TRACK NUMBER
3201360 320/360
0-39
320/360
1.2104
0-39
1.2104
1.2104
0-19
120K
120K
0-19
(CL) - SECTOR NUMBER (NOT VALUE CHECKED, NOT USED FOR FORMAT)
MED I A
DR I VE
SECTOR NUMBER
320/360 320/360
1-6/9
320/360
1.2104
1-6/9
1.2104
1.2104
1-15
120K
120K
1-9
IALl - NUMBER OF SECTORS (NOT VALUE CHECKED)
MED I A
DR I VE
MAX NUMBER OF SECTORS
320/360 320/360
6/9
320/360
1.2104
6/9
1.2104
1.2104
15
120K
120K
9
(ES:BX) - ADDRESS OF BUFFER (NOT REQUIRED FOR VERIFY)
(AH)",2 READ THE DESIRED SECTORS INTO MEMORY (AHI=3 WRITE THE DESIRED SECTORS FROM MEMORY
.,.·65
··'6
50
5' 52 53
5' 55
56 51
556.
60
6' 62 63
6' 65 66 61
66
6' 10 11
12 13
14 15 16 71
116.
60
6'
62 63
6' 65 66 61 66
.60 '
.,.2
..'3
.'65
91
··'6
100
'01 102 103 10. 105
106 101 106 10. 110
1' "12
113
"'
(AH)=4 VERIFY THE DESIRED SECTORS
(AH)=5
FORMAT THE DESIRED TRACK (ESIBX) MUST POINT TO THE COLLECTION OF DESIRED ADDRESS FIELDS FOR THE TRACK. EACH FIELD IS COMPOSED OF 4 BYTES, IC,H,R,N), WHERE C " TRACK NUMBER, H=HEAD NUMBER, R = SECTOR NUMBER, N: NUMBER OF BYTES PER SECTOR (00.126, 01_256, 02.512, 03 .. 1024). THERE MUST BE ONE ENTRY FOR EVERY SECTOR ON THE TRACK. THIS INFORMATION IS USED TO FIND THE REQUESTED SECTOR DURING READ/WRITE ACCESS.
PRIOR TO FORMATTING A DISKETTE, IF THERE EXISTS MORE THAN
ONE SUPPORTED MEDIA FORMAT TYPE WITHIN THE DRIVE IN QUESTION,
THEN "SET DASD TYPE" (INT 13H, AH", 11H) OR "SET MEDIA TYPE"
(INT 13H, AH: 16H) MUST BE CALLED TO SET THE DISKETTE TYPE THAT IS TO BE FORMATED. IF "SET DASD TYPE" DR "SET MEDIA TYPE" IS NOT CALLED, THE FORMAT ROUTINE WILL ASSUME THE MEDIA FORMAT TO BE THE MAXIMUM CAPACITY OF THE DRIVE.
THESE PARAMETERS OF 0 I SK BASE MUST BE CHANGED I N ORDER TO
FORMAT THE FOLLOWING MEDTASI
: MEDIA
: 320K : 360K : 1.2104 I 120K
:
DRIVE
I PARM 1 I PARM 2 I
: 320K/360K/I.2M I
: 320K/360K/I.2M I
: 1.2104
I
50H 50H 54H
.·6
'5
I 120K
I 50H
NOTES: - PARM 1 '" GAP LENGTH FOR"FORMAT
- PARM 2 = EDT (LAST SECTOR ON TRACK)
- DISK BASE IS POINTED TO BY DISK POINTER LOCATED
AT ABSOLUTE ADDRESS 0116H.
- WHEN FORMAT OPERATIONS ARE COMPLETE, THE PARAMETERS
SHOULD BE RESTORED TO THEIR RESPECTIVE INITIAL VALUES.
(AH)=6 READ DRIVE PARAMETERS
REGI STERS
INPUT
I DL) - DR I VE NUMBER (0 - 1 ALLOWED, VALUE CHECKED)
OUTPUT
(EStDI) POINTS TO DRIVE PARAMETERS TABLE
(CH) - LOW ORDER 6 OF 10 BITS MAXIMUM NUMBER OF TRACKS
(CLl - BITS 1 .. 6 - HIGH ORDER TWO BITS OF MAXIMUM TRACKS
- BITS 5 THRU 0 - MAX I MUM SECTORS PER TRACK (DHI - MAXIMUM HEAD NUMBER
(DL) - NUMBER OF DISKETTE DRIVES INSTALLED
(BH) - 0 (BLl - BITS 1 THRU 4 - 0
BITS 3 THRU 0 - VALID DRIVE TYPE VALUE IN CMOS
(AX) - 0
UNDER THE FOLLOWING CIRCUMSTANCESI
(1) THE DRIVE NUMBER IS INVALID,
(21 THE DR I VE TYPE I S UNKNOWN AND CMOS I S NOT PRESENT, (3) THE DR I VE TYPE I S UNKNOWN AND CMOS I S BAD, (4) OR THE DRIVE TYPE IS UNKNOWN AND THE CMOS DRIVE TYPE IS
THEN ES,AX,BX.CX,DH,DI=O I DL=NUMBER OF DRIVES. IF NO DRIVES ARE PRESENT THENI ES,AX,BX,CX,DX,DI=O.
llDSKETTE_STATUS = 0 AND CY I S RESET.
INVALID
(AH)=15 READ DASD TYPE
OUTPUT REG I STERS
(AH) - ON RETURN IF CARRY FLAG NOT SET, OTHERWISE
00 - DRIVE NOT PRESENT 01 - DISKETTE, NO CHANGE LINE AVAILABLE
02 - DISKETTE, CHANGE LINE AVAILABLE
03 RESERVED (DL) - DRIVE NUMBER (0-1 ALLOWED, VALUE CHECKED 1
ERROR
DISKETTE (01/10/86) 5-23
IBM P.",sonel Comput.e ... MACRO A55emble... V.... aion 2.00 DSKETTE -- 01/10/86 DISKETTE ADAPTER BIOS
1-2 01-10-86
""'"""5...
120 121
122
123 12. 125 12. 121 12.
12' 130 131 132 133
13' 135 13. 131 13.
1,.30' "'"2
143
I ·· 145 I ·· 141
I ··
I ··
150 151 152 153 154 155 15. 151 15.
,1'..05,'
''..32
,.,I'..5.
I ··
I ·· I ·· ITO ITI 112
I11,3.
115 IT. 1T1 IT.
,1,'...102,. I,'...35' ,.,I ·· I,"I .·.0,·'
102 103
,.,"'"5
I ··
".100
200 20 I 202 203 20. 205 20. 201 20e 20' 210
2" 212 213 21.
("'HJ=16 DISK CHANGE LINE STATUS
OUTPUT REGISTERS
(AH) - 00 - DISK CHANGE LINE NOT ACTIVE
06 - DISK CH"'NGE LINE ACTIVE & CARRY 81T ON f DLl - DR I VE NUMBER ,0-1 ALLOWED, VALUE CHECKED)
,AH)_ll SET DASD TYPE FOR FORMAT INPUT REGISTERS
,AL) - 00 - NOT USED
01 - DISKETTE 320/360K IN 360K DRIVE 02 - DISKETTE 360K IN 1.2M DRIVE 03 - DISKETTE 1.2M IN 1.2101 DRIVE 04 - DISKETTE 720K IN 720K DRIVE 101..) - DRIVE NUMBER (0-1 ALLOWED, VALUE CHECKED; DO NOT USE WHEN DISKETTE ATTACH CARD USED)
(AH)=16 SET MEDIA TYPE FOR FORMAT INPUT REGISTERS I CH) - LOW ORDER 8 OF 10 81 TS MAX I MUM NUMBER OF TRACKS ICL) - BITS 7 & 6 - HIGH ORDER TWO BITS OF MAXIMUM TRACKS
- BITS 5 THRU 0 - MAXIMUM SECTORS PER TRACK
WLJ - DRIVE NUMBER (0-1 ALLOWED, VALUE CHECKED) OUTPUT REG I STERS
(ESIDI) - POINTER TO DRIVE PARAMETERS TABLE FOR THIS MEDIA TYPE,
UNCHANGED IF, AH) I S NON-ZERO
'AH) - OOH. CY = 0, TRACK AND SECTORS/TRACK COMBINATION IS SUPPORTED
- OIH, CY = I, FUNCTION IS NOT AVAILABLE - OCH, CY = I, TRACK AND SECTORS/TRACK COMBINATION IS NOT SUPPORTED
DISK CHANGE STATUS IS ONLY CHECKED WHEN A MEDIA SPECIFIED IS OTHER
THAN 360 KB DR I VE. I F THE 0 I SK CHANGE 1..1 NE I S FOUND TO BE ACTIVE THE FOLLOWING ACT IONS TAKE PLACE I
ATTEMPT TO RESET DISK CHANGE LINE TO INACTIVE STATE. IF ATTEMPT SUCCEEDS SET DASD TYPE FOR FORMAT AND RETURN 01 SK CHANGE ERROR CODE IF ATTEMPT FAILS RETURN TIMEOUT ERROR CODE AND SET DASD TYPE TO A PREDETERMINED STATE INDICATING MEDIA TYPE UNKNOWN. IF THE DISK CHANGE LINE IN INACTIVE PERFORM SET CASD TYPE FOR FORMAT.
DATA VARIABLE -- ClDISK POINTER
DOUBLE WORD PO I NTER TO THE CURRENT SET OF 0 I SKETTE PARAMETERS
OUTPUT FOR ALL FUNeT IONS
AH = STATUS OF OPERATION
STATUS BITS ARE DEFINED IN THE EQUATES FOR ClDISKETTE STATUS
VARIABLE IN THE DATA SEGMENT OF THIS MODULE
CY := 0 SUCCESSFUL OPERATION IAH=O ON RETURN, EXCEPT FOR READ OASD TYPE AH= ( I 5 J ) ·
CY . , FAILED OPERATION ,AH HAS ERROR REASON)
FOR READIWRI TE/vER I FY
DS.BX,DX,CX PRESERVED NOTE~ IF AN ERROR IS REPORTED BY THE DISKETTE CODE, THE APPROPRIATE
ACTION IS TO RESET THE DISKETTE, THEN RETRY THE OPERATION.
ON READ ACCESSES, NO MOTOR START DELAY IS TAKEN, SO THAT
THREE RETRIES ARE REQUIRED ON READS TO ENSURE THAT THE
PROBLEM IS NOT DUE TO MOTOR START-UP.
LIST DISKETTE STATE MACHINE - ABSOLUTE ADDRESS 40:90 (DRIVE A' .. 91 (DRIVE B)
LI ST
I
I
I
I
RESERVED
I
PRESENT STATE
0001 360K IN 360K DRIVE UNESTABLISHED
0011 360K IN 1.2104 DRIVE UNESTABLISHEO
010: 1.2104 IN 1.2104 DRIVE UNESTABLISHED
011: 360K IN 360K DRIVE ESTABLISHED
1001 360K IN 1.2104 DRIVE ESTABLISHED
10111.2104 )N 1.2104 DRIVE ESTABLISHED
1101 RESERVED
I I 1 I NONE OF THE ABOVE
-----> MEDIA/DRIVE ESTABLISHED
--------------> DOUBLE STEPPING REQUIRED 1360K IN 1.2114
DRIVEl
------------------------------> DATA TRANSFER RATE FOR THIS DRIVEl
001 500 KBS
011 300 KBS lOt 250 KBS 1 I I RESERVED
1..1 ST STATE OPERATION STARTED - ABSOLUTE ADDRESS 40192 IDRIVE AI & 93 !DRIVE B) PRESENT CYLINDER NUMBER - ABSOLUTE ADDRESS 40194 (DRIVE AI .. 95 IDRIVE B)
5-24 DISKETTE (01/10/86)
~, ".--..,.,
IBM Paraonal Computar- MACRO Aa.a_blar- Var-siQn 2.00 OSKETTE -- 01110/86 DISKETTE ADAPTER BIOS
1-'
01-10-86
215 21.
2" 218 219
220 22\ ZeZ
223 224
225 226 221 228 229 230 231 232 233 234 235 23. 237 238 239
240
2" 2.2
2"2"
2.5 2·· 2.7
22'.8'
250 251 252 253 25. 255 25. 257 258
259 260 261 262 263 264 265 266 267
268 269 270
27 t 272 273
274 275 276 277
218 279 280 281 282
228.3'
2.S 2.0 287
288 289
290 29,
292 293
29'
229'5.
291 298 299 300 30 I 302
303 304 305
306 307 308 309 310 31 t 312 3 t 3 314
315
316 317 318 319
320 321 322
323 32. 325 32. 327
328
0000 7 0001 7 0002? 0003 0004 0005 0006 0001 0008 0009? OOOA? OOOB? OOOC? OOOD
007F :: 0080
0000
0000 0000 01 0001 0000 E 0003 82 0004 0000 E 0006 02 0001 0000 E 0009 03 OOOA 0000 E OOOC 84 0000 0000 E OOOF 04 0010 0000 E :: 0012 :: 0006
0012 0012 FB 0013 55 0014 57 0015 52 0016 53 0017 51 0018 8B EC
OOIA IE OOIB 56 00 I C E8 0000 E OOIF 80 FC 19 0022 12 02 0024 B4 14 0026 0026 80 FC 0 t 0029 76 OC 002B 80 FC 08 002E H 07 0030 80 FA 03 0033 76 02 0035 B4 14 0037 0037 8A CC 0039 32 ED 0038 DO EI 0030 BB 0060 R 0040 03 D9 0042 8A E6 0044 32 F6 0046 8B FO 0048 8B FA 004A 8A 26 0041 R 004E C6 06 0041 R 00
PAGE
MD STRUC 10m-SPEC 1 MO-SPEC2 MO-OFF TIM MD-BYT-SEC
MO-SEC-TRK MO-GAP
MD-DTL
MD-GAP3 MO-FIL BYT
MD-HD Til.,
Me-STft TIM MD-MAX-TRK Me-RATE
MO:STRUC
STRUC DB DB DB
DB DB
DB DB
DB DB
DB DB DB DB ENDS
I SRT=D. HO UNLOAO.. OF - 1ST SPECIFY BYTE I HO LOAD= t, MOOE ..OMA - 2ND SF'EC I FY BYTE I WAIT TIME AFTER OPERATION TILL MOTOR OFF
I 512 BYTES I SECTOR I EaT i LAST SECTOR ON TRACK)
I GAP LENGTH
I DTL. I GAP LENGTH FOR FORMAT I FILL BYTE FOR FORMAT I HEAD SEtTLE T I ME (101 I LL I SECONDS I I MOTOR START TIME (1/8 SECONDS)
I MAX. TRACK NUMBER I DATA TRANSFER RATE
BIT70FF BI T70N
EOU
7FH
EQU
80H
PUBL I C DISK INT I
PUBL IC
PUBLIC
~!~~i~~~~~6~~
PUBLIC
PUBL I C RESOLTS
PUBLIC SEEK
EXTRN
EXTRN EXTRN EXTRN
EXTRN EXTRN EXTRN ExTRN
EXTRN
DDSINEAR
DISK BASEINEAR
WAITF,NEAR
1040 TBLI tNEAR
MD-TBL2:NEAR
MO-TBL3INEAR
MD-TBL4 I NEAR
MO-TBl5;NEAR
MD:TBL61 NEAR
CODE
SEGMENT BYTE PUeL I C
ASSUME CS ;CODE.OS I DATA, ES I DATA
-- --- ; ~ ---- - - - - - - - -- ------------- - - -- - - ------------------ -------
;
DRIVE TYPE TABLE
1--- - - - - - - - - - --- - - - - - - - --- - - --- -.-- ------ - ---- - - ----- - -- - - - - - - --
DR TYPE
lABEL BYTE
-
DB
01
I DRIVE TYPE, MEDIA TABLE
OW
OFFSET MD TBll
DB
02+BIT10N
OW
OFFSET hiD TBL2
DB
02
OW
OFFSET 1160 TBl3
DB
03
OW
OFFSET MD TBl"
DB
04+BIT70N
ow
OFFSET 1040 TBL5
DB
04
DR TYPE E
OW
OFFSET hiD 1BLE>
4
-
I END OF' TABLE
oR:CNT -
EQU
I DR_TYPE_E-DR_TYPE I 13 J NUMBER OF ORIVE TYPES
DISKETTE 10 1 5TI
PUSH PUSH PUSH PUSH PUSH
MOY
PUSH
PUSH
CALL
CMP
OB
MDY
OK FUNCI
-
CMP
OBE
e"p
OZ cop
OBE
"DY
"OY XDR SHL
MOY
AOD MOY XOR MDY
MOY
MOY MOy
PROC
FAR
BP
01
ox
BX CX BP,SP
Os
S I
DDS
AH, (FNC TAE-FNC TAB) /2
OK FUNC-
-
AH-;-14H
AH,I OK oRV
AH-;-8 OK Dftv
DL-;-3 OK DRV AH-;-I4H
CL.AH
CH.CH
CL,t
BX.OFFSET FNC TAB
BX,CX
-
AH,DH
DH.OH
SI,AX
Ol,oX
AH,OoSKETTE STATUS
ODSKETTE_STATUS.O
:»> ENTRY POINT FOR ORG OEC59H
I NTERRUPTS BACK ON
USER REG I STER
USER REG I STER
HEAD ' . DR I 'IE · OR USER REG I STER
BUFFER OFFSET PARAMETER OR REGISTER
TRACK '-SECTOR · OR USER REGISTER
BP
..> PARAMETER LIST DEP. ON AH
1 : 8P] .. SECTOR ·
:~:~I ~~~~~R' OFFSET
FOR RETURN OF DR I VE PARAMETERS 1
CLf[BP] · BITS 7&6 HI BITS OF MAX CYL BITS 0-5 NAX SECTORSfTRACK
: ~~a~:~1 ~~;S!7~!T; ~F NAX CYL.
BITS 3-0 = VALID CMOS TYPE
~~~I:~:!I :~ DRIVES INSTALLED
OHI BP+5 .. MAX HEAD.
01 J BP+6 = OFFSET TO DISK BASE
BUFFER SEGMENT PARN OR USER REG I STER
USER REG I STERS SEGMENT OF BIOS DATA AREA TO OS CHECK FOR > LARGEST FLINCT 1ON
FUNCTION OK REPLACE WITH KNOWN INVALID FUNCTION
RESET OR STATUS? IF RESET OR STATUS DRIVE ALWAYS OK ; READ DRIVE PARNS ? I F SO DR I 'IE CHECKED lATER DRIVES 0.1.2 AND 3 OK IF 0 OR I THEN .JUMP REPLACE WITH KNOWN INVALID FUNCTION
= CL FUNCT I ON = CX FUNCT I ON
FUNCTION TINES 2 LOAD START OF FUNCT ION TABLE ADD OFFSET INTO TABLE .> ROUTINE AX · HEAD ' , ' OF SECTORS OR DAse TYPE OX .. DRIVE' S I · HEAD ' , ' OF SECTORS OR OASo TYPE 01 · DRIVE. LOAD STATUS TO AH FOR STATUS FUNCTION INITIALIZE FOR ALL OTHERS
THROUCHOUT THE DISKETTE BIOS, THE FOLLOWING INFORMATION 15 CONTAINED IN THE FOLLOWING MEMORY LOCATIONS AND REGISTERS. NOT ALL DISKETTE BIOS
FUNCTIONS REQUIRE ALL OF THESE PARANETER5.
01
I DRIVE.
DISKETIE (01/10/86) 5-25
IBM Pl!Il"'l!Ional ComputeI"' MACRO AssembleI"' V.I"'S10n 2.00 OSKETTE -- 01/10/8& 0 I SKETTE ADAPTER 8 I OS
1-4 01-10-86
32. 330 331 332 333 334 335 33. 331 338 33. 340 3"'1 342 3"'3 3"'4 ).45
346 341 346
349 350 351 352 353 354 355 356 357 358 359
360 361 362
3&3 364 365 366 361 368
369 370 311 372 313 374
315 376 377 378 379 380 381 382 383 384 385 366
387 368
389 390 391
392
393 394 395 396
397 398 399 400 40 t
402 403 404 405 406 401
408 409 410 411 412
413 414 415
416 417
418 -419 420 421 422 423 424 425 426' 421 428 429 430
431 432
433 -434
-435 436 -431 438 43. 440 441 442
0053 2E: FF 17
0056 5E 0057 IF .0058 59 00i9 58 005A SA 0058 5F 005C 50 0050 CA 0002
0060 0092 R 0062 OOEA R 0064 00F6 R 0066 0 I 02 R 0068 010E R OO&A 011A R 006C 01 7D R 006E 0 t 7D R 0070 0187 R 0072 0110 R 0074 0110 R 001& 0[70 R 0018 0170 R 007A 0110 R 007C 0[70 R 007E 0170 R 0080 0110 R 00820170 R 0084 0 [70 R 008& ot7o R 0086 0110 R 006A 021C R OOSC 0280 R 008E 02E5 R 0090 0340 R : 0092 0092
0092 0092 BA 03F2 0095 FA 0096 AD 003F R 0099 24 3F
0098 DO co
0090 DO CO 009F DO CO
OOA 1 00 co
00A3 OC 08 00A5 EE 00A6 C6 06 003E R 00 OOAB EB 00 OOAo OC 04 OOAF EE 0080 F8 OOB I E8 OABA R 00B4 12 20 00B6 89 OOCO
00B9 00B9 51 OOBA 86 00E2 R OOBo 50 OOBE B4 08 OOCO E8 09FO R 00C3 58 OOC4 E8 OAE2 R 00C7 59 00C8 72 [9
OOCA 3A OE 0042 R OOCE 75 13 0000 FE C I 0002 80 F9 C3 0005 7& E2
0007 0001 E8 030 I R DaDA OOOA E8 0832 R 0000 88 DE OODF 8A C3 OOEI C3
00E2 00E2 59 00E3 00E3 80 OE 00E8 EB Fa OOEA
0041
R 20
SI-HI : HEAD"
SI-LOW : , OF SECTORS OR OASO TYPE FOR FORMAT
ES
: BUFFER SEGMENT
[BP)
: SECTOR'
I:~:H I TRACK'
~ BUFFER OFFSET
ACROSS CALLS TO SUBROUTINES THE CARRY FLAG (CY:I], WHERE INDICATED IN
SUBROUT I NE PROlOGUES, REPRESENTS AN EXCEPTION RETURN (NORMALLY AN ERROR
CONDITION]. IN MOST CASES, WHEN CY = I, _OSKETTE STATUS CONTAINS THE
SPEC I F I C ERROR CODE.
(AH) = 4IOSKETTE STATUS
CALL
WORD PTR CS: 18X)
CALL THE REQUESTED FUNCT ION
POP
5 I
POP
OS
POP
CX
POP
BX
POP
OX
POP
01
POP
BP
RET
2
RESTORE AL.L. REGI STERS ; THROW AWAY SAVED FLAGS
~~~-~~B-~;------~~;~-~~;~~----------------~~-:-~~;-;~;~~--------
-
OW
OW
OW
OW
OW
OW
OW
OW
ow
DISK-STATUS
0 I SK-READ OISK-WRITE 0 [SK-VERF 0 I SK-FORMAT
FNC ERR FNC-ERR 0 I SK PAR~S FNC ERR
AH = 01; STATUS
AH = 02 I READ
AH = 031 WRITE
AH = 041 VER I FY
AH = 051 FORMAT
AH = 06; INVALID
AH = 07; INVALlD
AH = 08, READ DR I VE PARAMETERS
AH :: 091 INVALID
OW
FNC-ERR
AH .. OA, INVALlO
OW
FNC-ERR
OW
FNC-ERR
OW
FNC-ERR
AH = OB; INVALID
AH = OC, INVALID
AH = 00; INVAL.lo
OW
FNC-ERR
OW
FNC-ERR
AH : OEI INVALID
= AH OFI INVALID
OW
FNC-ERR
ow
FNC-ERR
OW
FNC-ERR
ow
FNC-ERR
ow
FNC-ERR
AH .. la, AH .. III
= AH 121 = AH 131 = AH 141
INVALID
INVALID
INVALID
INVALID
INVALID
OW
ow
DW
OW FNC TAE EQU
DISK TYPE DISK-CHA.NGE FORMAT SET SET ~E5IA , -
AH: 15;
= AH = 161
AH 171 AH = 161 END
READ DASO TYPE
CHANGE STATUS
SET OASO TYPE
SET MEDIA TYPE
DISKETTE 10 I ENDP 1- - - -- - -::" --::"--- -
; 01 SK RESET
;
- RESET THE DISKETTE SYSTEM.
,
-- -: - - - -: : ON EXITI
b~~~-;~;~~---
~~~~~~~:=:~ ~~~~ ~ ~ ~:~:::~ -:~ ~~~: ~~ ~~:~~~~ ~~
PRQe
NEAR
-
MOV
CLI
MOV
AND
ROL
ROL
ROL
ROL
OR
OU1
MOV
JMP
OR
OUT
ST I
CALL
JC
MOV
DX,03F2H
AL,_MOTOR STATUS AL,OOIIIIIIB AL,I AI.., ! AL,I AL,I AL,OOOOIOOOB OX,AL. 4ISEEK STATUS,O '+2 AL.,OOOOOIOOB oX,AL
WAIT INT OR ERR CX-;-IIOOOOOOB
ADAPTER CONTROL PORT NO INTERRUPTS
GET 0 I G IT AI.. OUTPUT REGI STER REFLECT! ON
a KEEP SELECTED AND ~OTOR ON I TS
MOTOR VALUE TO HIGH NIBBLE
DRIVE SELECT TO LOW NIBBL.E
TURN ON I NTERRUPT ENABLE RESET THE ADAPTER SET RECALIBRATE REQUIRED ON WAIT FOR I/O TURN OFF RESET BIT RESET THE ADAPTER ENABLE THE INTERRUPTS WAIT FOR THE INTERRUPT I F ERROR. RETURN IT CL. = EXPECTED _NEC_STATUS
AL.L.
DRIVES
NXT DRV:
-
PUSH
MOV
PUSH
MOV
CALL.
POP
CALL
POP
JC
CMP
JNZ
INC
CMP
JBE
CX
AX,OFFSET DR POP ERR
AX
-
AH,08H
NEC OUTPUT AX -
RESULTS
CX DR ERR
CL-;-4INEC STATUS DR ERR CL
CL,II0000118 NXT_ORV
SA VE FOR CALL LOAD NEC_OUTPUT ERROR ADDRESS
; SENSE I NTERRUPT STATUS COMMAND
I THROW AWAY ERROR RETURN 1 READ I N THE RESULTS I RESTORE AFTER CALL ; ERROR RETURN I TEST FOR DRIVE READY TRANSITION ; EVERYTHING OK I NEXT EXPECTED 4INEC STATUS
ALL POSSIBLE DRIVES CL.EAREO FALL THRU IF 110001008 OR >
SEND SPEC I FY CO~MANO TO NEC J1,
RESBAC:
CALL MOV MOV
RET
DR POP ERR:
-
- POP
OR JMP DISK_RESET
SETUP END 8X,SI
AL,BL.
VARIOUS CLEANUPS GET SAVED AL TO BL PUT BACK FOR RETURN
CX
I CLEAR STACK
I 4IDSKETTE STATUS,BAD NEC I SET ERROR CODE
SHORT RESBAC ENDP
-
I RETURN FROM RESET
DISK STATUS
;
- 0 I SKETTE STATUS.
; ON ENTRY:
AH = STATUS OF PREVIOUS OPERATION
5-26 DISKETTE (01/10/86)
IBM P ... sonal Compute .. MACRO Assemble.. V.... ion 2.00
DSKETTE -- a I /1 a18E:> 0 r SKETTE ADAPTER; 810S
'-5
0[-10-86
443 444 445 HE:> 447 448 449
450 451 452
453 454
455 45. 451
450
"9
44..0,
OOEA OOEA 88 2E:> 0041 R OOEE E8 0832 R OOFI 88 DE 00F3 8A C4 OOF5 C3 aOFE:>
4.2 4.3 4.4 4.5 466 00F6 461 00F6 80 26 003F R IF
468 OOFS B8 E646 469 OOFE E8 0483 R 410 0101 C3 411 0 I 02 472
473 414 415 47. 411 470 479 480 481 482 483 484
485 0102 486 0102 88 C54A 481 0105 80 OE 003F R 80 466 OIOA E8 04B3 R 489 0100 C3
490 OIOE 491 492 493 494 495
49. 497 498 49. 500 501
502 503 504 OIOE 505 OIOE 80 26 003F R 7F 506 a I 13 B8 E642 5010116E804B3R 508 0 I 19 C3 509 a I IA 510 511
512 513 514 515 51. 511 510 519
520 521 522 523
524 525 011A 526 OIIA E8 0404 R 521 0110 E8 05AO R
528 0120 80 OE 003F R 80 529 0125 F6 06 D08F R 01 530 012A 14 05
531 012C E8 05FS R 532 a12F 12 41 533 0131
534 0131 E8 0658 R 535 0134 14 06 53E:> 0136 E8 0301 R 537 0139 E8 0631 R 538 013C 539 013C BO 4A 540 013E E8 0668 R 541 0141 12 2F 542 0143 84 40
543 0 I 45 E8 06CB R 544 0148 12 28 545 014A 88 0112 R 546 0140 50 547 014E B2 03 548 0150 E8 08FE R 549 0153 E8 09Fa R 550 0156 B2 04 551 0158 E8 08FE R
552 015B Ell 09FO R 553 015E B2 01 554 0160 E8 08FE R 555 0163 E8 09FO R 556 0 I 66 B2 08
- -- -------------- ; ON EXIT:
: -----------
---t-lO-S-K--E-TT-E---S-T-A-T-U-S-.--CY
REFLECT
------- -
-
STATUS
----
OF
OPERATION
DISK STATUS
-
MOV
CALL
"OV
PROC
NEAR
"DSKETTE STATUS,AH
SETUP ENO
8X,SI-
PUT BACK FOR SETUP END VAR I DUS CL.EANUPS GET SAVED AL. TO BL
"OV
AL.,AH
STORE STATUS IN AL
RET
DISK_STATUS
ENDP
;------------- ----- ----- ---------
------ ---------------------- --
= DISK READ - DISKETTE READ.
ON ENTRY;
01
SI-HI
SI-L.OW
= DRIVE If = HEAD If = If OF SECTORS
I(~~:~I ES BP)
:: BUFFER SEGMENT = SECTOR If
= TRACK If
= BUFFER OFFSET
;; -O-N--E--X-I-T :
DISK READ
-
AND
"OV CALL
RET
DISK_READ
tlD~~:~~:=: ~ ~ ~~:.: _:~ _~:~~::~ _:: ~~~: _~~_~~:~~!: ~~_:
PROC
NEAR
tlMOTOR STATUS,OlllllllB
AX , OE646H
RD_WR_VF
I INDICATE A READ OPERATION , AX = NEC COMMAND, OMA COMMAND C COMMON READ/WRITE/VERIFY
ENDP
DISK WRITE
- DISKETTE WRITE.
ON ENTRY:
01
= DRIVE If
SI-HI = HEAD If
SI-LOW ES
I[BP] BP+ I] BP+2]
'" It OF SECTORS
== BUFFER SEGMENT SECTOR.
= TRACK.
= BUFFER OFFSET
b ------ ---- ---------------------- -------------- ON EXIT; ~ ~~ -;~ ~;~
"DSKETTE_STATUS, CY REFLECT STATUScOF OPERATION I
;;~~
~~~~
-
MOV
OR
CALL
RET
01 SK_WR I TE
AX, aC54AH
I AX = NEC COMMAND, DMA COMMAND
flMOTOR STATUS,IOOOOOOOB I INDICATE WRITE OPERATION
RD_WR_VF
I COMMON READ/WR I TE/VER I FY
ENDP
01 SK VERF
- DISKETTE VERIFY.
ON ENTRY I
01
= DRIVE If
S I -H I "HEAD'
S 1-LOW = If OF SECTOR 5
ES
" BUFFER SEGMENT
[BP]
'" SECTOR If
':~:~I ~ ~~~~~R'OFFSET
~~ -:~ ~ ~: ------~~:~:~!:::"~!~!~:.:-~~ -~:~~:~~ -:~~~~~-~~-~~:~~ ~ ~~~-:
01 SK VERF
PROC
NEAR
-
AND
flMOTOR STATUS,OIIII'118 J INDICATE A READ OPERATION
MOV
AX , OE642H
; AX = NEC COMMAND, DMA COMMAND
CAL.L
RD_WR_ VF
I COMMON READ/WR ITE/VER I FY
RET
DISK VERF
ENDP
1---=-----------------------------------------------------------
; DISK FORMAT
I
;
- 0 I SKETTE FORMAT.
I ON ENTRY:
01
= DRIVE If
51-HI '" HEAD If
51-LOW = · OF SECTORS
E5 [BP]
'" BUFFER SEGMENT = SECTOR If
[:::~I ~ ~~~~~R IfOFFSET
tlDISK POINTER POINTS TO THE PARAMETER TABLE OF
-
THIS DRIVE
6 - ---- - ---- ------------------------------------ ON EXIT: ~;~ ;~~;~;
tlOSKETTE_STATUS, CY REFLECT STATUS OF OPERATION I
;~~~
~~~;
-
CALL
CAL.L.
~~ST
,JZ CALL ,JC NO CHG CHECK; - - CALL
JZ CAL.L CALL
XLAT NEW FMT TNIT
:~~Tg~'f~~~6~~L. I 00000008
NO CHG CHECK MED CHANGE FM_DON
C TRANSLATE STATE TO PRESENT ARCH. ; ESTABL.ISH STATE IF UNESTA8L1SHED
~~~+C~~T~~~~~R O~~~~T I ON
CHECK MEO I A CHANGE AND RESET I F SO MEDIA CHANGED, SKIP
CHK LASTRATE
FM iR
SEND SPEC
SEND::::RATE
ZF=! ATTEMPT RATE IS SAME AS LAST RATE YES, SK I P SPEC' FY CONMAND SEND SPEC I FY COMMANO TO NEC SEND OATA RATE TO CONTROLLER
"OV CALL JC OOV
CALL JC OOV PUSH OOV CALL CAL.L
"OV CAL.L. CALL MOV
CALL CALL
"OV
AL,04AH
OMA SETUP
FM DON
AH:-04DH
NEC INIT
FM DON
AX:-OFFSET FM OON
AX
-
DL,3
GET PARM
NEC-OUTPUT
DL,4
GET PARM
NEC-OUTPUT DLI~
GET PARM
NEC-OUTPUT
DL,!
WILL WRITE TO THE OISKETTE SET UP THE DMA RETURN WITH ERROR I ESTABL.I SH THE FORMAT COMMAND I INITIALIZE THE NEC
I L.OAD ERROR ADDRESS ; PUSH NEC OUT ERROR RETURN I BYTES I SE-e:TOR VALUE TO NEC
I SECTORS/TRACK VALUE TO NEC
I GAP L.ENGTH VALUE TO NEC
FILLER BYTE TO NEC
DISKETTE (01/10/86) 5-27
IBM Per~on.1 Computer MACRO A~s.mbler
Vers,on 2.00
OSKETTE -- 01/10/86 DISKETTE ADAPTER 8105
1-6 01-10-86
557 0168 E8 08FE R 558 0168 E8 09FO R 559 016E 58 560 016F E8 0121 R 561 0172 562 0172 E6 0432 R 563 0115 E8 Otl32 R 564 0 I 78 8B DE 565 017A 8A C3 566 01 7C C3 567 0110 5b6 5b9
.,.570
.,.571
572
575 576
577 57t1 579
580 581 562 563 56.
56' 56b 561 566 569 590 591 592 593 59. 595 59b 597 596 599 bOO bOI b02 b03 bO. 605
606 601 b06 b09 blO 611 612 613 614
bl5 616
617 616 619 620
621 6ZZ 623 624 625
626 621 628 629 630 631
632 633 634
635 636 637 638
639 640 641 642 643
·6·4·4
646 641 648 649
650 651 652 653 654
655 ..6 6.7 658 659 660
661 662
66663 '
..5 ..6
667 668 669 610
0170 0170 tlB C6 017F B4 01 0181 88 26 0041 R 0185 F9 0186 C3 0187
0187 018781 FF 0080 018B 72 06
018088 C6 018F B4 01 0191 F9 0192 C3
0193 0193 E8 0404 R 0196 C7 46 OZ 0000 019B AI 0010 R 019E Z4 CI 0 I AO DO E8 0lA2 13 lC 0lA4 00 CO 01 A6 DO CO 0 I A8 00 CO 0 I AA FE CO OIAC 88 46 04 OlAF F6 06 008F R 0 I B4 75 03 01 B6 E9 0256 R 01B9 0lB9 83 FF' 01 OIBC 77 66 OIBE C6 46 05 01 0lC2 E8 08CF R 0lC5 12 16 OICl OA CO 0lC9 14 12 0 I CB E8 03B I R OICE 72 00 0100 88 46 02 0103 2EI 8A 4F 04 0107 2E: 8A 6F OB 010B EB 32
0100 0100 8A AS 0090 R OIEI F6 C4 10 0lE4 74 3E
0lE6 0lE6 80 E4 CO 01 E9 80 Fe 80 alEC 75 54
OIEE BO 01 0 I FO E8 038 I R 0lF3 ZEI 8A 4F 04 0lF7 ZEI 8A 6F OB 0 I FB F6 85 0090 R a I 0200 74 00
0202 0202 BO 04 0204 E8 03B I R 0207 2E: 8A 4F 04
CALL CALL POP CALL
GET PARM NEC-OUTPUT AX -
NEC_TERM
THROW AWAY ERROR TERMINATE, RECEIVE STATUS. ETC.
CALL CALL
"OV
XLAT OLO SETUP END BX.SI
TRANSLATE STATE TO COMPAT I BLE MODE VAR I OUS CLEANUPS GET SAVED AL TO BL
"OV RET
AL,BL
PUT BACK FOR RETURN
DISK FORMAT
ENDP
I - - -::-- - - - - - - - - - - ------- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - -
; FNC ERR
I
;
- INVALID FUNCTION REQUESTED OR INVALID DRIVE;
I
SET BAD COMMAND IN STATUS.
- - ---- -------- ------------- - ON EXIT:
~~~ ~;~ ~~~~
ClOSKETTE_STATUS. CY REFLECT STATUS OF OPERATION I
~~~~
~~~ ~~ ~ ~ ;~~~; ~ ~ ~~~~~;T
-
MOV
AX,SI
RESTORE AL
MOV
AH,BAD CMD
SET BAD COMMAN;I ERROR
MOV
ClOSKETTE_STATUS.AH
STORE IN DATA AREA
STC
SET CARRY INDICATING ERROR
RET
F; N-C-_-E-R-R--E-N-O-P-- - -- - - - - - - ------ --------- - - - - ---- - -- - - --------- -----
; 01 SK PARMS
;
- READ OR I VE PARAMETERS.
= ; ON ENTRYI
;
01 DRIVE #
; ON EXIT:
CLI [BP]
= BITS 7 .. 6 HIGH 2 BITS OF MAX CYLINDER
BITS 0-5 MAX SECTORSITRACK
~~n~~:~1 = LOW 8 BITS OF MAX CYLINDER =BITS7-4.0
BITS 3-0 = VALID CMOS DRIVE TYPE
BH/ [8P+3]
OO HL /I I BBPP++451 011 BP+6
· 0
= , DRIVES INSTALLED = MAX HEAD # = OFFSET OF MEDIA/DRIVE PARAMETER
TABLE
ES
== SEGMENT OF MEDIA/DRIVE PARAMETER TABLE 0
NOTE: THE ABOVE INFORMATION IS STORED IN THE USERS STACK AT THE LOCATIONS WHERE THE MAIN ROUTINE WILL POP THEM INTO THE APPROPRIATE REGISTERS BEFORE RETURNING TO THE I CALLER.
; CHECK FOR F I XED MEO I A TYPE REQUEST , CONTINUE IF NOT REQUEST FALL THROUGH
F I XED 01 SK REQUEST FALL THROUGH ERROR
NOV NOV STC RET
RESTORE AL WITH CALLERS VALUE SET BAD COMMAND ERROR IN (AH) SET ERROR RETURN CODE
DISK P2;
-
CALL
"OV NOV
AND SHR JNC ROL ROL
ROL
INC
"OV TEST
JNZ
J"P
OPI CONTI
-
CMP
JA
"OV CALL
JC
OR
Jl CALL JC NOV
"OV "OV
J"P
XLAT NEW WORO-PTR [BP+2] ,0 AX, ClEQU I P FLAG
AL,II000001B AL,I NON ORV
AL,T AL,I AL,l
AL [BP+4j,AL ClHF CNTRL, DUAL OPI-CONT
OET::::PARMS
01,1 NON DRVI
BYTE PTR[BP+5),1 CMOS TYPE CHK EST
AL,AL CHI( EST
DR TYPE CHECK CH< EST-
[BP+2] ,AL
CL,CSI!B'I·MO_SEC_TRK
CH,CSI 8X .1I1D MAX TRK
SHORT TO_CX -
-
TRANSLATE STATE TO PRESENT ARCH. DRIVE TYPE. 0 LOAD EQU I PMENT FLAG FOR · 0 I SKETTES KEEP DISKETTE DRIVE BITS ARE THERE ANY ORIVES INSTALLED? NC-->NO DRIVES, ZERO PARAMETERS ROTATE TO ORIGINAL POSITION ROTATE BITS 6 AND 1 TO 0 AND I
CONVERT TO RELATIVE 1 STORE NUMBER OF OR I VES CHECK CONTROLLER 1.0. CONT I NUE WITH USUAL PARMS CHECK RETURN TH I S CONTROLLERS PARMS
CHECK FOR VALID ORIVE DRIVE INVALID MAx I MUM HEAD NUMBER = 1 RETURN DR I VE TYPE IN AL ON CMOS BAD CHECK ESTABL I SHED TEST FOR NO OR 1VE TYPE JUMP IF SO RTN CSsBX · MEDIA/DRIVE PARAM TBL I TYPE NOT IN TABLE IPOSSIBLE BAD CMOS) ; STORE VALID CMOS DRIVE TYPE I GET SECTOR/TRACK I GET MAX. TRACK NUMBER I CMOS GOOD, USE CMOS
CHK EST:
-
MOV
TEST
JZ
AH,ClDSK STATE[OI] AH ,MED OET NON_DRVI
I LOAD STATE FOR THIS DRIVE I CHECK FOR EStABLISHED STATE : CMOS BADl INVALID AND UNESTA8LISHEO
USE EST;
-
AND
C"P JNE
AH,RATE MSK AH,RATE-Z50 USE_EST~
I SOLATE STATE RATE 250 ? NO, GO CHECK OTHER RATE
;--- DATA RATE IS 250 KBS, TRY 360 KB TA8LE FIRST
NOV
CALL NOV NOV
TEST JZ
AL,OI
; DRIVE TYPE 1 (360KB)
DR TYPE CHECK
g~:g~: f:~1 :~g-~~~-i~~
I RTN CS:BX · MEDIA/DRIVE PARAM TBL
; GET SECTORITRACK GET MAX. TRACK NUMBER
ClaSK STATEIOIT,TRt< CAPA I 80 TRACK ?
STo_Ex
-
I MUST BE 360K8 DR I VE
IT IS HIGH DATA RATE/80 TRACK DRIVE
PARM HDR 80T,
-
MOV
CALL NOV
AL,O'"
reX] DR TYPE CHECK
CL7cs,
.MD_SEC_TRK
DRIVE TYPE 4 RTN CSIBX = MEDIA/DRIVE PARAM TBL GET SECTOR/TRACK
5-28 DISKETTE (01/10/86)
IBM Personal Computer MACRO Assembler Vers_on 2.00 DSKETTE -- 01/10/86 DISKETTE ADAPTER BIOS
'-1
0' -, 0-86
671 020B 2E: 8A 6F 08 612 673 020F
674 020F 89 4E 00 675 0212
676 0212 89 5E 06 677 0215 8C C8 678 0217 8E CO 619 680 0219 681 0219 E8 0432 R
682 021C 33 CO 683 021E F8 684 021 F C3 685
686 681 688 0220 689 0220 C6 46 04 00 690 691 0224 692 0224 81 FF 0080 693 0228 72 09 69.
695
696 697 022A
698 022A E8 0432 R 699 0220 8B C6
700 022F 84 0 I
701 0231 F9
702 0232 C3 103
704 '1233 705 0233 33 CO 706 0235 89 46 00 707 0238 88 66 05
708 023B 89 46 06 709 023E 8E CO
710 0240 EB 07
111
112
113 714 0242 715 0242 BO 02
716 0244 E8 03Bl R 7 I 7 0247 2E: 8A 4F 04
718 024B 2E I 8A 6F OB
719 024F 80 FC 40 720 0252 74 BB
721 0254 E8 AC 722 0256
723 0256 83 FF 03 724 0259 77 08
725 025B Bl 09 726 0250 F6 85 0090 R 01 727 0262 80 0 I 728 0264 85 27 729 0266 74 04
730 0268 BO 03 731 026A 85 4F
732 026C 733 026C 88 46 02 734 026F C6 46 03 00
735 0273 C6 46 05 01 736 0277 E8 03Bl R 737 027A EB 93
138 739 027C 140 14. 142
143
144 , 745
146 141 748 027C 749 027C F6 06 008F R 0 I 750 0281 74 22 751 0283 E8 0404 R
752 0286 8A 85 0090 R 753 028A OA CO 754 028C 74 13 755 028E B4 01
756 0290 A8 01 757 0292 74 02 758 0294 B4 02 159 760 0296
761 0296 50 762 0297 E8 0432 R 763 029A 58
764 029B 765 0298 F8 766 029C 8B DE 767 029E 8A C3
768 02AO C3 769 02A 1
770 02A 1 32 E4 771 02A3 E8 Fl 772 02A5 773 02A5 AI 0010 R 774 02A8 DO E8 775 02AA 73 F5 776 02AC B4 01 177 02AE EB EB
778 0280 119
180
18' 182
183
18'
"oy
I GET MAX. TRACK NUM8ER
STO_CX: "oy
ES_OII
"Oy "Oy "Oy
DP_OUT:
CALL XOR CLC RET
[BP] ,CX
[BP+6] ,BX AX,CS ES,AX
XLAT OLD AX,AX
1 SAVE I N STACK FOR RETURN
ADDRESS OF MEDIA/DRIVE PARM TABLE
SEGMENT MEDIA/DRIVE PARAMETER TABLE ES I S SEGMENT OF TABLE
TRANSLATE STATE TO COMPATIBLE MODE CLEAR
1- - - - - NO DR I 'IE PRE SENT HANDLER
NON ORV:
-
1040'1
8YTE PTR [8P+4],O
1 CLEAR NUMBER OF OR I VES
NON DRVI:
-
CMP
"8
CHECK FOR FIXED MEDIA TYPE REQUEST CONTINUE IF NOT REQUEST FALL THROUGH
1----- FIXED DISK REQUEST FALL THROUGH ERROR
FD REQ ERR:
-
- CALL
"OY "OY
'TC RET
XLAT OLD AX,sT AH,8AO_CMO
ELSE TRANSLATE TO COMPATIBLE MODE
RESTORE AL
SET BAD COMMAND ERROR
SET ERROR RETURN CODE
NON ORV2:
-
XOR
"oy "oy
"Oy "Oy
""P
IAX,AX BP] ,AX
BP+5I,AH 8P+6 ,AX ES,AX SHORT OP_OUT
CLEAR PARMS I F NO DR I VES OR TRACKS, SECTORS/TRACK" 0 HEAD = 0
OFFSET TO 01 SK BASE" 0
ES I S SEGMENT OF TABLE
CMOS
BAD
;--- DATA RATE IS EITHER 300 KBS OR 500 KBS, TRY 1.21048 TA8LE FIRST
USE EST2:
-
1040'1
CALL
"OY "Oy
C"P
""P"E
DET PARMS:
-
CMP
"A
"oy
TEST
"OY "Oy
"Z
"oy
"OY
SET TYPI:
-
1040'1
"OY
"OY CALL
""P
AL,02
DR TYPE CHECK
g~:g~: I~~I :~g-;~~-+=~
AH,RATE 300 -
STO CX -
SHOAT PARM_HDR_80T
DRIVE TYPE 2 (1.2MB) RTN CSIBX = MEDIA/DRIVE PARAM TBL
GET SECTOR / TRACK
GET MAX. TRACK NUMBER RATE 300 ? MUST BE 1.2MB DRIVE ELSE, HIGH DATA RATE/80 TRACK DRIVE
01,3
NON DRV2
CL,9
.DSK STATE[DI],TRK CAPA
AL,I-
CH,39
SET TYPI
AL,3
CH,79
REQUEST FOR FIXED DISK?
YES-->DRIVE NUMBER INVALID
IS DRIVE 80 TRACKS?(RELATIVE ZERO) SET CMOS TYPE 1
NUM8ER OF TRACKS (RELATIVE ZERO)
IF ZERO TYPE =1
SET CMOS TYPE 3
NUMBER OF TRACKS (RELATIVE ZERO)
1 STORE TYPE
MAX I MUM HEAD NUMBER " I
ADDRESS OF DISK
BASE
GO SET TRKS/SEC,CYL,ESIBX AND EXIT
;-~~~; - ~;;~- - ----- - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - -- - - - - - - - - -----
I
- THIS ROUTINE RETURriS THE TYPE OF MEDIA INSTALLED.
1 ON ENTRYI
01 = DRIVE.
: ON EXIT:
AH = DRIVE TYPE, CY=O
I
1- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
01 SK TYPE
PROC
NEAR
-
TEST
.HF CNTRL,DUAL
1 CHECK CONTROLLER 1.0.
,JZ
NO CHNG
CALL
XLAT NEW
TRANSLATE STATE TO PRESENT ARCH.
1040'1
AL,.5sK STATE[DI)
GET PRESENT STATE INFORMATION
OR
AL,AL-
CHECK FOR NO DR I 'IE
,JZ
NO DRV
1040'1
AH-;-NOCHGLN
NO CHANGE LINE FOR 40 TRACK DR I 'IE
TEST
AL, TRK CAPA
IS THIS DRIVE AN 80 TRACK DRIVE?
,JZ
DT BACK
IF NO ,JUMP
1040'1
AH-;-CHGLN
CHANGE LINE FOR 80 TRACK OR I 'IE
DT BACK I
-
PUSH
CALL
POP
DISK TYPE EXI
- cCc
"oy
"OY RET
AX XLAT OLD
AX
8X,SI AL.8L
SAVE RETURN VALUE
TRANSLATE STATE TO COMPATIBLE MODE RESTORE RETURN VALUE EXIT DISK TYPE FUNCTION
NO ERROR
GET SAVED AL TO BL
PUT BACK FOR RETURN
XOR
""P NO CHNG:
AH,AH SHORT DT_BACK
1 NO OR I 'IE PRESENT OR UNKNOWN
-
1040'1
AX,.EQUIP FLAG
'HR
AL,1
LOAD EQU I PMENT FLAG FOR · 0 I SKETTES SH I FT DR I VES PRESENT BI T I NTO CARRY
"NC
NO DRV
NO DRIVE IN SYSTEM
"OY
AH-;-,
DISKETTE NO CHANGE LINE AVAILABLE
DISK_TYPE_EX
""P DISK_TYPE ENDP
------ ---- ;
------ -----------
-
-
-
-
-
-
-
-
-
-
-----------------------
---
; 0 I SK CHANGE
;
- THIS ROUTINE RETURNS THE STATE OF THE DISK CHANGE LINE. I
ON ENTRY I
01 = DRIVE.
DISKETTE (01/10/86) 5-29
IBM Person.' Comput..r MACRO Assembler Version 2.00 DSKETTE -- 0f/,0/86 DISKETTE ADAPTER 8105
1-.
01- t 0-86
7··
7··
7.7
7.'7 · · 02BO
790 02BO F6 06 008F R 01
791 0285 15 03
792 02B1 E9 0110 R
793 02BA
7·· 02BA E8 0404 R
7·· 02BD 8A 85 0090 R
7 ·· 02CI OA CO
7'7 02C3 74 19
7 ·· 02C5 A8 01
7·· 02C7 74 05
800
801 02C9 E8 OB21 R
802 O~CC 14 05
~ 02CE C6 06 0041 R 06
80.
..00..80.
.07
0203 E8 0432 R 0206 E8 0832 R 0209 8B DE 020B 8A C3
8 I 0 0200 C3
.".'2 020E
.',813 020E 80 DE 0041 R 80 02E3 EB EE
." 02E5
....,,,..."
· 20 · 21 822
.23
...·2.
.2..27 ..22.. 02E5
.30 02E5 E8 0404 R
831 .32 833
......333...".....,..3'0'
02E8 56
02E9 8B Cb
02EB 32 E4
02EO 8B FO 02EF 80 A5 0090 R OF 02F4 4E
02F5 75 01
02Fl 80 80 0090 R 90 02FC EB 3E
02FE 02FE F6 06 008F R 01
8.3 0303 14 OA
......8········
·· 7
.50
0305 E8 05F5 R
0308 80 3E 0041 R 80
0300 14 20
030F 4E 0310 75 07 0312 80 80 0090 R
8" 0311 EB 23
.·'·3·8.2
0319 0319 4E
···.55
..··.·5···7··0,
8.2 8.3
......··5
031A 15 01
03TC 80 80 0090 R 10
0321 EB 19
0323 0323 4E
0324 15 20
0326 FE> 85 0090 R 04 032B 14 09
0320 80 50
032F F6 85 0090 R 02
.,.··.·7···0··7
8"
872
8"
0334 75 02
0336
0336 eo 90
0338
0338 08 85 0090 R
....7777"5...
033C 033C E8 0432 R 033F E8 0832 R 0342 5B 0343 8A C3
··0 0345 C3
881
··2 0346
·· 3 0346 CE> 06 0041 R 01
88.
········ 7
034B EB EF 0340
..······,··0
··2
...8.3
8··" · ····· 7
I ON EXIT:
= AH .OSKETTE STATUS
00 - DISK CHANGE LINE INACTIvE. CY = 0
06 - DISK CHANGE L[NE ACTIVE, CY = 1
~ ~~; - ~~~~G~ - - - - - ~~~~ - - - - ~~~~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
DCI:
TEST ..INZ ..IMP
CALL NOV OR JZ TEST JZ
.HF CNTRL.DUAL DC' FNC_ERR
XLAT NEW
:t::~SK_STATE[DII
DC NON AL-;TRK CAPA SET! T -
I TEST CONTROLLER 1.0.
ERROR FOR TH I SKI NO OF CONTROLLER
TRANSLATE STATE TO PRESENT ARCH, GET MEDIA STATE INFORMATION DRIVE PRESENT? JUMP IF NO OR [VE 80 TRACK DR I VE ? I F SO · CHECK CHANGE LINE
DCO:
CALL JZ
READ DSKCHNG FINIS
GO CHECK STATE OF DISK CHANGE LINE CHANGE LINE NOT ACTI VE
SETIT: "OY
.OSKETTE_STATUS .MED I A_CHANGE
I INDICATE MEDIA REMOVED
FINIS:
CALL CALL
"OY "OY RET
XL AT OLD SETUi5 END BX,SI
AL,BL
TRANSLATE STATE TO COMPAT[BLE MODE VARIOUS CLEANUPS GET SAVED AL TO BL PUT BACK FOR RETURN
~C_NON I OR JNP
01 SK_CHANGE
OOSKETTE STATUS,TIME OUT
SHORT FINIS
ENOP
I SET TI MEOUT. NO DR I VE
; ------------------- ---- ----------- ------------------ -----------
; FORMAT SET
I
THIS ROUTINE IS USED TO ESTABLISH THE TYPE OF
;
MEDIA TO BE USED FOR THE FOLLOWING FORMAT OPERATION ·
;
; ON ENTRY:
S I LOW = DASD TYPE FOR FORMAT
I
01
=DRIVE ·
ON EXIT:
~~;;~~~;~;-
- CALL PUSH NaY XOR NaY AND DEC JNZ DR J"P
.DSKETTE STATUS REFLECTS STATUS
AH = .DSR"ETTE STATUS
CY :: 1 IF ERROR
PROC
NEAR
XLAT NEW
I TRANSLATE STATE TO PRESENT ARCH.
SI -
I SAVE DASe TYPE
AX,S1 AH,AH
I AH '" 1 , AL '" DASD TYPE
= I AH · 0 · AL DASD TYPE
SI,AX
I SI = DAse TYPE
.DSI'(_STATE[DI J ,NOT MED_DET+DBL_STEP+RATE_MSK
; CLEAR STATE
SI
I CHECK FOR 320/360K MEDIA & DRIVE
NOT 320
I BYPASS I F NOT
CtDSK_STATE[DII,NED_DET+RATE_250 ; SET TO 320/360
SHORT SO
NOT_320:
TEST
JZ CALL
e"p
JZ
CtHF CNTRL,DUAL
S3
MED CHANGE
I
.OSKETTE STATUS. TIME OUT
SO
-
-
I
TEST CONTROLLER 1.0.
CHECK FOR TI ME_OUT IF TIME OUT TELL CALLER
S3:
DEC
SI
I CHECI'( FOR 3201360K IN 1.2M DRIVE
JNZ
NOT 320 12
I BYPASS I F NOT
OR
;~~~'i'S~~TE[DII'MED_OET+DBL_STEP+RATE_300 I SET STATE
JNP
NOT 320 12:
-
-DEC
JNZ
DR
J"P
SI
I CHECK FOR 1.2M MEDIA IN 1.2114 DRIVE
NOT 12
I BYPASS I F NOT
.OSK STATE[DI] ,MED OET+RATE 500 I SET STATE VARIA8LE
SHORT so
- ; RETURN TO CALLER
NOT_'2: DEC JNZ
TEST JZ NaY TEST JNZ
51 FS_ERR
J .DSK_STATE [0 I .DRV_DET
ASSUME AL,MED DET+RATE 300
~~~~T~T~TE[DII'FMT_CAPA
CHECK FOR SET DASD TYPE 04 BAD COMMAND EXIT IF NOT VALID TYPE
OR[VE DETERMINED? IF STILL NOT DETERMINED ASSUME
MULTIPLE FORMAT CAPABILITY ? IF 1.2 M THEN DATA RATE 300
ASSUME,
NOV
I SET UP
OR [T INI
- - OR
so:
CALL CALL POP "OY RET
.DSK_STATE[DI) ,AL
XLAT OLD SETUP END BX AL,BL
I OR IN THE CORRECT STATE
TRANSLATE STATE TO COMPATIBLE VARIOUS CLEANUPS GET SAVED AL TO BL PUT BACK FOR RETURN
MODE
"OY JNP
CtOSKETTE STATUS.BAO CMD 1 UNKNOWN STATE.BAD COMMAND
SHORT SO-
FORMAT_SET
ENOP
; -------------------- ----- ---------------------- ------- ---------
; SET MEDIA
;
- THIS ROUTINE SETS THE TYPE OF MEDIA AND OATA RATE
;
TO BE USED FOR THE FOLLOWING FORMAT OPERATION ·
; ON ENTRY;
I~:! 1) ~ i~~~~R 'pER TRACK
01 ON EXIT:
= DRIVE'
.DSKETTE STATUS REFLECTS STATUS IF NO ERRORs
5-30 DISIG[11nE(Ol/lO/86)
IBM Personal Computer MACRO Assembler Version 2.00 OSKETTE -- 01/10/8& DISKETTE ADAPTER 8105
1-9 ai-la-56
·.0·0·
'01 .02 903
.0..04
'05
907 905 909 910 911 912 913 914 915 916 917 91a 919 920 921 922 923 924 925
926 927 92a 929 930 93 \ 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947
'9445.
950
'51 '52
..53
.54
''55.5,. ,'·'55.·,.0'
0340 0340 E5 0404 R 0350 33 08 035280 1E 01 21 0356 75 08 0358 F& 55 0090 R 01 035074 1& 035F B3 03
0361 EB 12 0363 036383 06
0365 eo 7E 00 OF
0369 74 OA 03&8 B3 12 03&0 80 7E 00 12 0311 74 02 0373 83 OC 0375 0375 2E: 58 9F 000 I R
LE 037A 2E: 8A 41 04 031E 2E: 8A 67 OB 0382 39 46 00 0385 75 23 0357 2E: 8A 47 OC 038B 3C 40 0380 75 02 035F OC 20 039. 0391 89 5E 06 0394 OC 10 039& 50 AS 0090 R OF
0398 05 85 0090 R 039F 8C C5
03AI 5E CO 03A3 03A3 E5 0432 R 03A6 E8 0832 R
03A9 C3 03AA 03AA C6 06 0041 R OC 03AF EB F2
0381
··2 963 964
965 966
967 968
969 970 971
972 973 974
975 97& 977 978 979 950
...981
'9.532
0381 0381 50
03B2 51 0383 33 08
0385 99 000& 0388
0385 2E: eA A7 0000 R 0380 3A C4 038F 74 05
03CI 83 C3 03 03C4 E2 F2 03C6 F9
03C7 E9 05 03C9 03C9 2EI 88 9F 0001 R 03CE 03CE 59 03CF 55 0300 C3
0301
·····5
961 .66 96. 990 991
992 0301
993 030 I B5 03E8 R 994 0304 50 995 0305 84 03 996 0307 E8 09FO R 997 030A 2A 02 998 030C E8 08FE R 999 03DF E8 09FO R 1000 03E2 82 01 1001 03E4 E8 05FE R 1002 03E7 E8 09FO R 1003 03EA 58 1004 03EB 1005 03EB C3 100& 03EC 1007 1008 1009 1010
101 I
AH CY
= =
a 0
= ES SEGMENT OF MEDIA/DRIVE PARAMETER TABLE
DII[BP+61 = OFFSET OF MEOlA/DRIVE PARAMETER TABLE
IF ERROR I
= AH = OOSKETTE STATUS
CY I
1--- - --- - - - -- - - - -- ------- - - - ---------- -------------------------
SET MED IA
PRoe
NEAR
-
CALL
XL AT NEW
I TRANSL.ATE STATE TO PRESENT ARCH.
XOR Ct.lP
8X,BX BYTE PTR (BP+'l,39
= I ZERO I NDEX PO INTER
I MAX. TRACK 40 ?
JNE
TBL CHK I
TEST
OoSK STATE[OIJ,TRK CAPA I 50 TRACK DRIVE?
JZ
MD FNO
-
I POINT TO TABLE ENTRY,
MOV
BL73
, POINT TO TABLE ENTRY 2
...IMP
SHORT MD FNO
TBL CHKII
-
-
MOV
Ct.F
BL,6 BYTE PTR (BPI,15
PO I NT TO TABLE ENTRY 3
SECTORS/TRACK = 15 ?
...IE
1040 FND
MOV
BL718
POINT TO TABLE ENTRY &
CMP
BYTE PTR [BPi. 18
SECTORSITRACK IE 15 ?
JE
MD FND
MOV
BL712
I PO I NT TO TABLE ENTRY 4
MD_FNDI
"OV
BX,CStWORD PTR OR_TYPE[BX+l]
I 01 = MEDIA/DRIVE PARAMETER ~AB
"OV "OV COP JNE MOV
CMP JNE
OR MD_SET:
"OV OR AND OR MOV
"OV SM_RTNI
CALL CALL RE1
ER - RTNI MOv
JMP SET_MED IA
:~:~~: ~:~I :=g-~;~-i=~
(BPI.AX
--
ER RTN ·
AL7CSI(BX).MO RATE
AL,RATE 300 -
NO SET
AL70BL_STEP
I GET SECTOR /TRACK I GET MAX. TRACK · I MATCH? I NOT SUPPORTED I GET RATE
I OOUBLE STEP REQUIRED FOR RATE 300
[BP+6I,8X
I SAVE TABLE POINTER IN STACK
I AL,MED DET
I SET MESIA ESTABLISHED
:g;~-~r:i~~g: :~~T MEO_O~T;~~L!~!~~+RATE-MSK I CLEAR STATE
AX,CS ES, AX
I SEGMENT MEDIA/DRIVE PARAMETER TABLE ; ES I S SEGMENT OF TABLE
XLAT OLD SETUP_END
I TRANSLATE STATE TO COMPATIBLE NODE I VARIOUS CLEANUPS
ClOSKETTE STATUS,MED NOT FND
SM RTN -
-
ENII?
I ERROR, NED I A TYPE NOT FOUND
;---------------------------------------------------------------
; OR TYPE CHECK
;
-
CHECK IF THE GIVEN DRIVE TYPE IN REGISTER (AL.I
;
IS SUPPORTED IN BIOS DRIVE TYPE TABL.E
ON ENTRY:
AL. = DRIVE TYPE
ON EXITI
CS = SEGNENT OF MEDIA/DRIVE PARAMETER TABLE (CODE)
= C'I' 0 DR I VE TYPE SUPPORTED
BX = OFFSET TO MEDIA/DRIVE PARAMETER TABLE
= CY 1 OR I VE TYPE NOT SUPPORTED
- --- -------- --- ----------- REG I STERS ALTERED: ax
~~ - ~;;~ -~~~;; - - -;~~~---- ~~;~ - - - -- - - -
-
-
-
-PUSH
AX
PUSH
XOR
MOV
TYPE CHK;
-
MOV
eMP
JE
ADD
LOOP
STC
JMP
OR TYPE VALID:
-
-MOV
TYPE RTN:
-
POP
POP
RET
DR_TYPE_CHECK
CX BX,BX CX ,DR_CNT
AH,CSIOR TYPElBX) AL ,AH OR TYPE VAL I 0 Bx73 TYPE_CHK
BX = I NDEX TO DR TYPE TABLE CX = LOOP COl.NT
; GET DR I VE TYPE I OR I VE TYPE MATCH? I YES. RETURN WITH CARRY RESET I CHECK NEXT OR I VE TYPE
I DRIVE TYPE NOT FOUND IN TABLE
BX,CS;WORD PTR OR_TYPE[BX+I)
ex
AX
ENDP
I BX IE MEDIA TABLE
; - - ----- -- - ------- -- -------- --- ------- ------------------------ --
; SEND SPEC
;
- SEND TME SPEC I FY COMMAND TO CONTROLLER US I NG DATA FROM
;
THE DRIVE PARAMETER TABLE POINTED BY ClOISK POINTER
; ON ENTRY:
ODISK POINTER = DRIVE PARAMETER TA§LE
I ON EXIT 1
NONE
; REG
;----
I
-
-S-TE- R- S--A--LT-E--R-E-D-:-
AX
--
------
-
---
-
---
-
---
-
-
-----
-
--
-------------
1
SEND SPEC
PRDC
NEAR
-
MOV
AX,OFFSET SPECBAC
LOAD ERROR ADDRESS
PUSH
AX
PUSH NEC OUT ERROR RETURN
MOV
AM,03M
SPEC I FY COMMAND
CALL
NEC OUTPUT
OUTPUT THE COMMAND
SUB
OL ,DL
FIRST SPEC I FY BYTE
CAL.L
GET PARhI
GET PARAMETER TO AH
CAL.L
NEC-OUTPUT
OUTPUT THE COMMAND
MOV
OL.T
SECOND SPEC I FY BYTE
CALL
GET PARM
GET PAR AMETER TO AH
CALL POP
NEC-OUTPUT AX
I OUTPUT THE COMMANO I POP ERROR RETURN
SPECBACI
RET
SEND_SPEC
ENOP
SEND SPEC 1040
- SEND THE SPECIFY COMMAND TO CONTROLLER USING DATA FROM THE NEOlA/DRIVE PARAMETER TABLE POINTED BY (CSI8)(1
DISKETTE (01/10/86) 5-31
IBM P",.sona' Co.put",. MACRO A ····bl.r V",.s,on 2.00 DSKETTE -- 01/10/6b DISKETTE ACAPTER BIOS
1-10 01-10-86
1012 1013 1014
1015 1016 03EC
1017 03EC Be 0403 R 10Ie 03EF 50 10 I 9 03FO B4 03
1020 03F2 E8 09FO R
1021 03F5 2E: eA 27 1022 03F8 E6 09FO R
1023 03F8 2E: 8A 67 01 1024 03FF E6 09FO R 1025 0402 58 102b 0403 1027 0403 C3 1026 0404 1029 1030 1031 1032
1033 1034 1035
1036 0404
1037 0404 F6 06 OOeF R 01 1038 0409 74 22 1039 0408 63 FF 01 1040 040E 17 10
1041 0410 80 eo 0090 R 00
1042 0415 74 11
1043 0417 6B CF 1044 0419 DO El
1045 0418 00 El 1046 0410 AO OOeF R 1041 0420 02 C8
1048 0422 24 07 1049 0424 80 A5 0090 R F8 1050 0429 06 65 0090 R 1051 0420 1052 0420 C3 1053 1054 042E
1055 042E E8 082B R 105b 0431 C3
1057 1058 0432 1059 1060
lObi 1062
IOb3 1064 1065
10b6 0432 1067 0432 F6 06 OOeF R 01 1068 0437 74 79 1069 0439 83 FF 01 1070 043C 77 74
1071 043E eo BD 0090 R 00 1072 0443 74 60 1073
1074
1075
1076 0445 88 CF 1077 0447 DO EI 107e 0449 DO EI 1079 0448 B4 02 loeo 0440 02 CC
106 I 044F 64 2b ooeF R 1082 0453 75 Ib 1083
1064
1085
loeb 0455 84 07 1087 0457 02 CC 10ee 0459 F6 04
1089 0458 20 2b ooeF R 1090 1091 1092
1093 045F 8A 85 0090 R 1094 04b3 24 07 1095 0465 02 C8 109b 0467 08 06 ooaF R 1097 10ge
1099 1100 046B 1101 046B eA AS 0090 R 1 102 046F eA FC 11030471 80 E4 CO
11040474 eo FC 00 110504771410
1106 0479 BO 01 1107 047B 60 FC 40 I 108 041E 75 1b 11090480 F6 C1 20 I I 10 0483 15 10 1111 1 I 12 0485
I I 13 0485 BO 07 11140481 EB 20 1115 1 I 16 0469 I I 17 0469 Ee oeeF R 1 I 18 048C 12 F1 1 I 19 048E 3C 02
1 120 0490 15 F3 112104928002
I 122 0494 EB OC 1123
1124 0496 11250496 BO 00
I ON ENTRY;
CS:BX = MEDIA/DRIVE PARAMETER TABLE
; ON EXIT:
NONE
-;;EC - --------------- ----- ; REG I STERS ALTERED: AX .CX, OX
;E~~
~~ ----;~~c---- ~E~~----------------
-
MOV
AX.OFFSET SPEC ES8AC
LOAD ERROR ADDRESS
PUSH
AX
-
PUSH NEC OUT ERROR RETURN
MOV
AH,03H
SPECIFY COMMAND
CALL
NEC OUTPUT
OUTPUT THE COMMAND
MOV
AH.CS:[BX].MO_SPECI
GET 1ST SPECIFY BYTE
CALL
NEC OUTPUT
OUTPUT THE COMMAND
MOV
AH.CS:(BX).MO_SPEC2
GET SECOND SPECIFY BYTE
CALL
NEC OUTPUT
OUTPUT THE COMMAND
POP
AX -
POP ERROR RETURN
SPEC ESBAC:
-
RET
----------- SEND_SPEC_MD
;
ENDP
I XLAT NEW
I
- TRANSLATES DISKETTE STATE LOCATIONS FROM COMPATl8LE
;
MODE TO NEW ARCH I TECTURE.
;
----- I ON ENTRY:
~~~~-~E;
01: ---;;~~
---- DRIVE ~E~;
------------------------------------
-
TEST
.JZ
CMP
.JA
3~P
XN_OUT:
MOV SHL SHL MOV ROR AND
~~O
RET
OHF CNTRL,DUAL
TEST CONTROLLER 1.0.
XN OUT
DI-;-1
VALID DRIVE?
XN OUT
~~~~E~TATE(DI] I 0
IF INVALID BACK NO DRIVE? IF NO DRIVE ATTEMPT DETERMINE
CX-;-O I
CX =: DR I VE NUMBER
CLII
CL = SHIFT COUNT, A_O, B;;.-4
CL,I
AL.OHF CNTRL
I DRIVE INFORMATION
AL.CL -
, TO LOW NIBBLE
AL,DRV DET+FMT CAPA+TRK CAPA
: KEEP DRIVE BITS
:g;~:;+~~~(g: E~~T DRV_~;T~~~!T~A6~~~~K~~~~~
CALL RET
TR Y TO DETERM [NE
XLAT OLD - TRANSLATES DISKETTE STATE LOCATIONS FROM NEW ARCHITECTURE TO COMPATIBLE MODE.
ON--E-N--T-R-Y-: ------01---: -D--R-IV-E---------------------------------------
XLAT OLD
PROC
NEAR
-
TEST
ClHF CNTRL, DUAL
; TEST CONTROLLER j .0.
oZ
XO OUT
C"P
01-;-1
oA
xo OUT
VALID DRIVE? IF INVALID BACK
CMP
OOSK STATE[OI],O
NO DRIVE?
ol
XO_OUT
IF NO DRIVE TRANSLATE DONE
TEST
"OV SHL SHL OOV ROR TEST oNl
FOR SAVED DRIVE
CX,OI CL,l CL,l
AH,FMT CAPA AH,CL ClHF CNTRL. AH SAVE_SET
INFORMATION
ALREADY SET
= CX DR I VE NUMBER
= CL SHIFT COUNT. A=O, B:4
LOAD MULTI DATA RATE BIT MASK
ROTATE BY MASK
MULTI-DATA RATE DETERMINED? IF SO, NO NEED TO RE-SAVE
ERASE DRIVE BITS IN ClHF_CNTRL FOR THIS DRIVE
OOV
ROR NOT ANa
~~:~~V_DET +FMT_CAPA+ TRK_;A~~ X MA~K M~gK K~~PKEEP
AH ClHF _CNTRL.AH
; TRANSLATE MASK
, KEEP BITS FROM OTHER DRIVE INTACT
ACCESS CURRENT DRIVE BITS AND STORE IN OHF_CNTRL
NOV AND ROR
OR
J AL.OOSK STATEIOI
; ACCESS STATE
AL.OR\! DET+FMT CAPA+TRK CAPA
I KEEP
AL.CL -
-
- ; FIX FOR THIS
OHF _CNTRL,AL
I UPDATE SAVED
DRIVE DRIVE
DRIVE
B[TS STATE
TRANSLATE TO COMPATIBILITY MODE
SAVE SET:
-
MOV
MOV
AND
eMP
Jl
MOV
COP
JNl
TEST
JNl
~~::~SK_STATEIDI ]
AH,RATE MSK AH.RATE-500 CHK HDR-eOT AL,h43Dla AH.RATE 300 CHK 250
~~;.~g~i'STEP
ACCESS STATE TO BH FOR LATER KEEP ONLY RATE RATE 500 ? YES 1.211.2 OR HIGH DATA RATE 80 TRK AL = 360 IN 1.2 UNESTABLISHED RATE 300 ? NO, 360/360 .120/120 YES, DOU8LE STEP? YES, MUST BE 360 IN 1.2
UNKNOt
OOV JMP
AL.MED UNK SHORT AL_SET
; 'NONE OF THE ABOVE' : PROCESS COMPLETE
CHK HDR 80T;
-
-CALL
Je eMP
JNE
"OV
o"P
CMOS TYPE UNKNO AL.02 UNKNO AL,M1DIU SHORT TST _OET
RETURN DR I VE TYPE I N I ALI
ERROR, SET · NONE OF THE ABOVE'
1.2MB DRIVE? NO, GO SET 'NONE OF THE ABOVE'
AL;;. 1.2 IN 1.2 UNESTABLISHED
CHK 250:
-
MDV
AL.M3D3U
AL = 360 IN 360 UNEST ABL I SHED
5-32 DISI(E11nE(Ol/lO/86)
IBM Per~on.1 Computer MACRO A~~emb t.r
Vera i on 2.00
DSKETTE -- 01/10/66 DISKETTE ADAPTER 810S
1-11 01-10-66
1126 0496 60 FC 60 1127 0498 75 E6
1126 0490 F6 C7 01 '129 04AO 75 E3 1130 1131 04A2 1132 04A2 F6 C7 10 1133 04A5 7402 1134 04A7 0403 1135 1136 04A9 1137 04A9 60 A5 0090 R F6 1 136 04AE 06 85 0090 R 1 139 0482
1140 0482 C3 11410483 1142 1143 1144 1145 1146 1147 1146 1149 1150 1151 1152 1 153 0483 1 154 0483 50 1 155 0484 E8 0404 R 1156 0487 E8 0561 R 1157 048A 56 1158 1159 0488 1160 0488 F6 06 008F R 01 1161 04CO 74 OA 1162 04C2 50 1163 04C3 E6 05F5 R 1164 04C6 56 1165 04C7 73 03 1 166 04C9 E9 0552 R 1167 04CC 1166 04CC 50 1169 1 170 04CD 6A 85 0090 R I 171 040 I 60 E6 CO I 172 I 173 0404 E6 08CF R 11740407 OA CO 11750409742F 1176 0408 E6 0381 R 1177 04DE 72 2A 1178 1179 1180
1161 04EO 57 I 182 04E 1 33 08 1163 04E3 89 0006 1164 04E6 1185 04E6 2E: 8A A7 0000 R 1 186 04E8 80 E4 7F 1187 04EE 3A C4 1188 04FO 75 08 1189 04F2 1190 04F2 2E: 688F 0001 R 119104F7 1192 04F7 2E: 3A 75 OC 1193 04F8 74 10 1194 04FD 1195 04FD 83 C3 03 I 196 0500 E2 E4 1 197 0502 C6 06 0041 R FF 1198 0507 5F I 199 0508 E8 3F 1200 1201 1202 1203 050A 1204 050A 88 0000 E 1205 0500 F6 65 0090 R 0 I
1206 0512 74 09 1207 0514 88 0000 E 12080517 E8 04 90 1209 1210 1211 1212 051A 1213 051A 88 OF 1214 051C 5F 12150510 1216
1217
1216 12190510 E8 03EC R 1220 0520 E6 0656 R
1221 0523 74 03 1222 0525 E8 0637 R 1223 0526 1224 0526 53 1225 0529 E8 064C R 1226 052C 58 1227 0520 72 IA 1226 052F 56 1229 0530 50 1230 0531 53 1231 0532 E8 0666 R 1232 0535 58 1233 0536 56 12340537 72 IF
1235 0539 50 1236 053A 53 1237 0538 E8 06C8 R 1236 053E 58
COP
JNZ TEST JNZ
TST DET:
-
TEST
JZ
ADD
AH,RATE 250 UNKNO 8H, TRK CAPA UNKND -
8H,MED DET AL SET AL-;-3
RATE 250 7
IF SO FALL THRU 80 TRACK CAPA81LITY ? IF SO ,JUMP, FALL THRU TEST DET
DETERMINED? I F NOT THEN SET MAKE DETERM I NED/ESTA8L I SHED
AND OR
RET XLAT_OLD
ENDP
; - ---- ----- ------------------------------ --- ------- -------------
;RDWRVF
,I
I
-
-COMMON READ, WRITE AND VERIFY, MAIN LOOP FOR STATE RETRIES.
I ON ENTRY I
, I
AH I READ/WRITE/VERIFY NEC PARAMETER AL I READ/WRITE/VERIFY oMA PARAMETER
-- - - ------------------ I ON EXIT:
ClDSKETTE_STATUS, CY REFLECT STATUS OF OPERATION I
~~ -;~ -~; - - - - - - ;~~~ - - - - ~~~~ -- - -- - - - - - -
-- - - -
- - PUSH CALL CALL POP
AX XLAT NEW SETUP STATE AX -
SAVE DMA, NEC PARAMETERS TRANSLATE STATE TO PRESENT ARCH. INITIALIZE START AND END RATE RESTORE READ/WRITE/VERIFY
DO AGAINI
-
TEST
JZ
PUSH
CALL POP
JNC
RWV:
J"P
PUSH
ClHF CNTRL, DUAL RWV AX MED CHANGE AX RWV RWV_END
AX
I TEST CONTROLLER 1.0. SAVE READ/WRITE/VERIFY PARAMETER MED I A CHANGE AND RESET I F CHANGED RESTORE READ/WRITE/VERIFY
, SAVE READ/WRITE/VERIFY PARAMETER
"OV AND
g~:~~~~:~~~TE[DI)
GET RATE STATE OF THIS DRIVE KEEP ONLY RATE
CALL OR JZ CALL
JC
CMOS TYPE AL,AC RWV ASSUME
DR TYPE CHECK RWV_ASSOME
RETURN DRIVE TYPE IN ,AL) TEST FOR NO DR t VE
ASSUME TYPE, USE MAX TRACK
RTN CS,8X = MEDIA/DRIVE PARAM T8L
TYPE NOT IN TA8LE ASSUME DEFAULT
SEARCH FOR MED I A/DR I VE PARAMETER TA8LE
PUSH
XOR
"OV RWV DR SEARCH:
- - MOV
AND
COP
JNE
RWV DR FND: - - MDV
RWV MD SEARCH: - - CMP
JE
RWV NXT MOl
-
-ADD
LOOP
"OV POP
J"P
01 8X,8X CX,DR_CNT
, SAVE DRIVE" , 8X .. I NDEX TO DR TYPE TA8LE , CX .. LOOP COUNT
:~:~i ~~~F~YPE[8X)
AL,AH RWV_NXT_MD
, GET OR I VE TYPE I MASK OUT MS8 I DRIVE TYPE MATCH? I NO, CHECK NEXT DR I VE TYPE
01 ,WORD PTR CSIDR_TYPE[8X+I) 101 .. MEDIA/DRIVE PARAMETER TA8LE
~~v~~~~~~~ .MD_RATE
MATCH ? YES. GO GET 1ST SPEC I FY 8YTE
8X,3
RWV DR SEARCH
ClDSKETTE STATUS,OFFH
01
-
SHORT CHK_RET
I CHECK NEXT DR I VE TYPE
FORCE I T TO RETRY RESTORE DR I VE , GO RETRY
;--- ASSUME PRIMARY DRIVE IS INSTALLED AS SHIPPED
RWV ASSUME:
-
MOV
TEST
JZ
"OV
J"P
8X, OFFSET MD T8L'
ClDSK STATE[DT], TRK CAP A
RWV 'ijD FNDI
-
8X ,OFFSET MD T8L3
RWV_MD_FNDI -
PO I NT TO 40 TK 250 K8S TEST FOR 80 TRACK MUST 8E 40 TRACK PO I NT TO 60 TK 500 K8S GO SET SPEC I FY PARAMETERS
;--- CS;8X POINTS TO MEDIA/DRIVE PARAMETER TA8LE
RWV Mo FND: - - MOV
POP RWV_MD_FNDI :
8X,DI 01
= I 8X MEDIA/DRIVE PARAMETER TA8LE
I RESTORE DR I VE ,
SEND THE SPEC I FY COMMAND TO THE CONTROLLER
CALL
CALL
JZ
CALL
RWV D8L:
-
PUSH
CALL
POP
JC
POP
PUSH
PUSH
CALL
POP
POP
JC
PUSH
PUSH
CALL
POP
SEND SPEC MD
CHK CASTRATE RWV-D8L SEND_RATE
ex SETUP D8L ex
CHK RET AX AX ex DMA SETUP ex -
AX RWV 8AC AX ex NEC INIT ex -
ZF= 1 ATTEMPT RATE I S SAME AS LAST RATE YES, SKIP SEND RATE COMMAND SEND DATA RATE TO NEC
SAVE MED I AlDR I VE PARAM ADDRESS CHECK FOR DOUBLE STEP RESTORE ADDRESS ERROR FROM READ 10, POSS 18LE RETRY RESTORE NEC,DMA COMMAND SAVE NEC COMMAND SAVE MEDIA/DRIVE PAR AM ADDRESS SET UP THE DMA RESTORE ADDRESS RESTORE NEC COMMAND CHECK FOR DMA 80UNDARY ERROR SAVE NEC COMMAND SAVE MEDIA/DRIVE PARAM ADDRESS INITIALIZE NEC RESTORE ADDRESS
DISKETTE (01/10/86) 5-33
IBh4 Per50nel Computer h4ACRO Assembl.,. Version 2.00 DSKETTE -- 01/10/86 DISKETTE ADAPTER 8105
1239 053F' 12 08
1240 0541 £8 06Fl R 1241 0544 12 03
1242 0546 ES 0721 R 1243 1244 0549 1245 0549 E8 078E R 1246 054C 58
1241 0540 13 03 1248 054F E9 0488 R 1249
12'50 0552 12'51 0'5'52 E8 0118 R 12'52 0555 E8 0805 R 12'53
1254 05'58 1255 0'5'58 50 1256 0559 E8 0432 R
1257 055C 58 1258 0550 E8 0832 R 12'59 0560 C3 1260 0561 1261 1262
1263 1264 0561 1265 0561 F'6 06 008F R 01
1266 0566 74 31 1261 0568 F6 85 0090 R 10 1268 0560 15 30 1269 056F 88 4080 1210 0512 F6 85 0090 R 04
1211 0511 74 OC 1212 051980 00 1213 0518 F6 85 0090 R 02 1214 0580 75 03 1215 0582 88 8080 1216 1211 0585 1218 0585 80 A5 0090 R IF
1219 058A 08 A5 0090 R 1280 058E 80 26 008B R F3 1208 1 0593 DO C8
12082 0595 DO C8 1283 0591 DO C8 1284 0599 DO C8 1285 0598 08 06 0088 R 1286 059F 1281 059F C3 1288 05AO
1289 12'90 12'91 12'92 05AO 12'93 05AO F6 06 008F R 01 1294 05A5 14 49
1295 05Al F6 85 0090 R 10 1296 05AC 15 42 1291 05AE E8 08CF R
1298 0581 12 3£ 1299 0583 FE C8 1300 0585 18 3A 1301 0587 8A A5 0090 R 1302 05B8 80 E4 OF
1303 058E OA CO 1304 05CO 15 05 1305 05C2 80 CC 90 1306 05C5 EB 25 1307 1308 05Cl 1309 05C7 FE C8 1310 05C9 15 05 131 1 O'5CS 80 CC 10 1312 OSCE E8 IC 1313
13140500 13150500 FE C8 1316050215 OF 1311 0504 F6 C4 04 13180507 14 10 13190509 F6 C4 02
1320 05DC 14 OB 1321 05DE 80 CC 50 1322 05El E8 09 1323 05E3
1324 05E3 FE C8 1325 OSE5 15 OA 1326 05El EB E2 1321 05E9
1328 05E9 80 CC 90 1329 05EC
1330 05EC 88 A5 0090 R 1331 05FO 1332 05FO C3 1~33 05FI 1334 05Fl 32 E4 1335 05F3 ES F7 1336 05F5 1331 1338 1339 1340
1341 1342 1343 1344 1345 05F5
1346 05F5 F6 06 008F R 01 1347 05FA 74 31 1348 05FC E8 OB2 I R 1349 05FF 14 34
1350 0601 80 AS 0090 R EF 1351 1352
JC CALL JC CALL
CHK RET:
-
CALL
POP
JNC
JMP
RWV ENOl
-
CALL
CALL
RWY BAC:
-
PUSH
CALL POP
CALL
RET RD_WR_YF
CHK RET RWV-COh4 CHK-RET NEC:TERh4
RETRY AX RWY END DO_AGAIN
DSTATE NUM_TRANS
AX XLAT OLD AX SETUP_END
ENDP
I F ERROR DO NOT SEND MORE COMMANDS OP CODE COh4MON TO READ/WRITE/VERIFY I F ERROR DO NOT SEND MORE COMMANDS TERh4INATE, GET STATUS, ETC.
CHECK FOR, SETUP RETRY RESTORE READ/WR ITE/VER I FY PARAMETER
CY = 0 NO RETRY
CY ,. 1 MEANS RETRY
= ESTABLISH STATE IF SUCCESSFUL
AL NUh4BER TRANSFERRED
BAD Dh4A ERROR ENTRY SAVE NUM8ER TRANSFERRED TRANSLATE STATE TO COMPATIBLE h40DE RESTORE NUMBER TRANSFERRED VAR IOUS CLEANUPS
~~;~;-;;~;~--
TEST
JZ TEST JNZ MOV TEST JZ MOV TEST JNZ MOV
PRDC
NEAR
ttHF CNTRL, DUAL ..JIC
TEST CONTROLLER I. D ·
J ttDSK_STATE[DI ,hlED_DET
MEO I A DETERh4l NED ?
JIC AX,RATE 300·H+RATE 250
NO STATES IF DETERh4lNED
AH = START RATE, AL = END RATE
ttDSK_STATE[DI J ,DR(::DET
DRIVE 1
AX SET
DO NOT KNOW OR I VE
AL7RATE 500
I SET UP FOR 1.2 101 END RATE
ttDSK STATE[DI).FMT CAPA I 1.2 M ?
AX SE'T
-
I ..JUh4P WITH FIXED END RATE
AX:RATE_250·X
= I START & END RATE 250 FOR 360 DR IVE
AND OR
I :g~~-~iN~lg: :~~T RATE_~S~;~~LF'~~~~ +OT~~~ OFF THE RATE
AND
ttLASTRATE,NOT STRT MSK ; ERASE LAST TO TRY RATE BITS
ROR
AL,I
- ; TO OPERATION LAST RATE LOCATION
ROR
AL, I
ROR
AL, I
ROR
AL,I
OR
IlILASTRATE.AL
; LAST RATE
..JIC:
RET
SETUP_STATE
ENOP
;--;~;~~~ ~;~ -~;;~;~ ~;~-;~ ~ ~~-~;-~~~;;~~~ ~ ;~~~-~;-;~~M~;-;~ ~~ ~ ---
-- ;~~ - ~ ~ ~~--- - - -;~~~----~~~; --------------------- --------------
-
jiST
~7F O~~TRL,DUAL
I TEST CONTROLLER 1.0.
TEST ..JNZ CALL ..JC DEC ..JS MOV
~~D
..JNZ OR JMP
CtDSK_STATE[DI J ,h4ED_DET
IS MEDI A ESTAaL! SHED
F lOUT
I F SO RETURN
CMOS TYPE
RETURN DR I VE TYPE IN AL
CL DRY
ERROR I N CMOS ASSUME NO DR I VE
AL-
h4AKE ZERO ORIGIN
CL DRY AH-:-ttDSK STATE[DI J
= NO DRIVE IF AL 0
I AH CURRENT STATE
~~:~~T MEO_DET+OBL STEP+7A~~E~~KFOR 360 I CLEAR
N 360 AH,MED_DET+RATE_250 SHORT SKP_STATE
I IF 360 WILL BE 0 I ESTABLISH MEDIA I SKIP OTHER STATE PROCESSING
DEC JNZ
FI RATE;OR
-
..IMP
AL N 12
AH,MED DET+RATE 500 SHORT SKP_STATE-
1.2 114 DRIVE ..JUMP IF NOT
SET FORMAT RATE SKIP OTHER STATE PROCESSING
DEC JNZ TEST
JZ TEST
JZ OR JMP
AL N 120
AR,DRY DET I SNT 12
AH. FNT CAPA ISNT 12 AH,MED DET+FtATE 300 SHORT SKP_STATE-
CHECK FOR TYPE 3 ..JUMP IF NOT IS DRIVE DETERMINED TREAT AS NON 1.2 DRIVE IS 1.2M ..JUMP IF NOT RATE 300
CONTINUE
DEC
JNZ
JMP
ISNT 12:
-
OR
SKP STATEI
-
MOV
AL CL DRY SHORT FI_RATE
AH.MED_DET +RATE_250
ttDSK_STATE[DII,AH
CHECK FOR TYPE 4 NO DRIVE. CMDS BAD
; MUST BE RATE 250 I STORE AWAY
RET
XOR
AH,AH
CLEAR STATE
..JMP
SHORT SKP STATE
SAVE IT
F; M --T-_-I-N-I-T----- ---E ---N - -D --P ----------- - - - --------------------- - - ----
; MEO CHANGE
I
- CHECKS FOR MEDIA CHANGE, RESETS h4EDIA CHANGE,
, ;
CHECK S MED I A CHANGE AGA IN.
ON EXIT:
CY = 1 MEANS MEDI A CHANGE OR T J MEOUT
- -- --- --- -- ------ --- - -- --- CtOSKETTE STATUS · ERROR CODE
~~ ~~~~~~-- - - ;~~~ -~~~~ -
- ---------
- - - - -
-
TEST
ttloF' CNTRL,DUAL
..JZ
OK2
I TEST CONTROLLER 1.0.
CALL
READ DSKCHNG
I READ DISK CHANGE LINE STATE
..JZ AND
MC OUT
I BYPASS HANDLING DISK CHANGE LINE
CtOSK_STATE[DIJ.NOT h4ED_DET
1 CLEAR STATE FOR THIS DRIVE
THIS SEQUENCE ENSURES WHENEYER A DISKETTE IS CHANGED THAT
5-34 DISKETTE (01/10/86)
IBM Person. I Computer NACRO Assembler Version 2.00 DSKETTE -- 01/10/86 DISKETTE ADAPTER BIOS
1-13 01-10-86
1353 1354
1355 1356 0606 68 CF 135706088001
1356 060A 02 EO 1359 060C F6 DO 1360 060E FA 1361 060F 20 06 003F R 1362 0613 F8 13630614 E8 0913 R
1364 1365
1366 13670617 E8 0092 R 1366 061A 85 01 1369 061C E8 OA14 R 1370 06 rF 32 ED 1371 0621 E6 OA14 R 1372 0624 C6 06 0041 R 06 1373 1374 0629 E8 0821 R 1375 062C 74 05
1376 1377 062E C6 06 0041 R 80 1378
1379 0633 F9 1380 0634 C3
1381 0635 1382 0635 F8
1363 0636 C3 1384 0637 1385 1386 1387 1388 1389 1390 1391
1392 0637 1393 0637 F6 06 008F R 01 1394 063C 74 19
1395 063E 50
1396 063F 60 26 0088 R 3F
1397 0644 8A 85 0090 R
1398 0648 24 CO
1399 064A 08 06 0088 R
1400 064E DO CO
1401 0650 DO CO
1402 0652 8A 03F7
1403 0655 EE
1404 0656 58
1405 0657
1406 0657 C3
1407 0658
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419 0658
1420 0656 50
1421 0659 81. 26 0088 R
1422 0650 8A 85 0090 R
1423 0661 25 COCO
1424 0664 3A C4
1425
1426 0666 56
1427 0667 C3
1426 0666
1429
ON THE NEXT OPERATION THE REQUIRED MOTOR START UP TINE WILL 8E WAITED. (DRIVE MOTOR MAY GO OFF UPON DOOR OPENING).
MOV MOV SHL NOT
eLi
AND
STI CALL
CX,OI AL,I AL.,CL. AL
.MOTOR_STATUS, AL
MOTOR_ON
,CL=DRIVE. ; MOTOR ON BIT MASK I TO APPROPR I ATE POS I TI ON I KEEP AL.L. BUT MOTOR ON I NO INTERRUPTS I TURN MOTOR OFF INDICATOR I I NTERRUPTS ENABLED I TURN MOTOR ON
TH I S SEQUENCE OF SEEKS I S USED TO RESET 0 I SKETTE CHANGE SIGNAL
CAL.L MOV CAL.L. XOR CAL.L MOV
0 I SK RESET
I RESET NEC
CH,oTH
· MOVE TO CYL.INOER
SEEK
1 I SSUE SEEK
CH I CH
I MOVE TO CYL I NDER
SEEK
I 1SSUE SEEK
.DSKETTE_STATUS,MEDIA_CHANGE
I STORE IN
1 0 STATUS
OK I: OK4:
CALL
"Z
MOV
READ DSKCHNG OK2 -
CHECK MED I A CHANGED AGA I N I F ACT I 'IE, NO DISKETTE, TI MEOUT
ClDSKETTE_STATUS.TlME_DUTI TIMEOUT IF DRIVE EMPTY
OK2: MC_OUT;
STe RET
eLe
I MED I A CHANGED I SET CY I NO MEDIA CHANGED, CLEAR CY
RET
MED_CHANGE
ENDP
1------------ -----
I SEND RATE
I
- SENDS DATA RATE COMMAND TO NEC
I ON ENTRY;
01::: ORIVE #
; ON EXIT;
NONE
;I -R--E-G-IS-T-E-R-S---A-L-TE--R-E-D-; --N-O-N-E--------------------------------------- 1
SEND RATE
-
TEST
JZ
PUSH
AND
MOV
PROC
NEAR
.HF CNTRL.,DUAL.
C S-OUT
AX -
ClLASTRATE,NOT SEND MSK
AL.ClOSK_STATE[DI] -
I I TEST CONTROLLER 1.0.
SAVE REG. EL.SE CLEAR LAST RATE ATTEMPTED GET RATE STATE OF THIS DRIVE
AND OR ROL.
AL ,SEND MSK .L.ASTRA'FE, AL. AL,I
KEEP ONL.Y RATE BITS SAVE NEW RATE FOR NEXT CHECK NOVE TO BIT OUTPUT POS I T IONS
ROL
MOV
OUT
POP
C S OUT:
--
RET
AL., I DX , 03F7H DX,AL. AX
OUTPUT NEW DATA RATE RESTORE REG.
SEND_RATE
ENDP
CHK LASTRATE - CHEC,"" PREV IOUS DATA RATE SENT TO THE CONTROLLER.
ON ENTRY;
01 ::: DRIVE" ON EXIT:
ZF ::: 1 DATA RATE I S THE SAME AS LAST RATE SENT TO NEC I ZF "0 OAT A RATE ISO I FFERENT FROM LAST RATE
------ -- --- ------ ---------- -- ------- REG I STERS AL.TERED: NONE
~~K -~~~T~~T~----;~~~----~~~~
-
PUSH
MOV
MOV
AND
CNP
POP
RET
CHK_LASTRATE
AX AH.ClLASTRATE AL.,ClDSK STATEIOi) AX,SEND-MSK-X AL I AH -
ENOF
I SAVE REG
; GET L.AST DATA RATE SELECTED I GET RATE STATE OF THIS DRIVE I KEEP ONLY RATE BITS OF 80TH I COMPARE TO PREY I OUSL. Y TR I ED I ZF · I RATE IS THE SANE I RESTORE REG.
DISKETIE (01/10/86) 5-35
IBM Person. I Computer MACRO Aase",bler Veraion 2.00 DSKETTE -- 01/10/86 DISKETTE ADAPTER 8105
'-14 01-10-86
1430 1431 1432
1433 1434 1435 1436
1437
1438 1439
1440 01b66
1441 01b1b6 FA 1442 01b1b9 E6 OC 1443 OIbIbB ED 00 1444 01b1b0 EO. OB
1445 066F 3C ... 2 1446 0671 75 04 1447 0673 33 CO 1446 0675 EB 15 1449 01b77 1450 0677 8C CO 1451 0679 01 CO 1452 067B 01 CO 1453 0670 01 CO 1454 01b7F 01 CO 1~55 066\ 8A E8 1456 01b63 24 FO 1457 0665 03 46 02 1456 0688 73 02 1459 068A FE C5 1460 01b8C 1461 068C 50
1462 0680 E6 04 I ~63 01b8F EB 00
1464 0691 8A C4 1465 01b93 E6 04 I ~66 0695 8A C5 1467 0697 EB 00 1468 0699 24 OF 1469 069B E6 61 1470 I,PI
1472 1~73 0690 88 C6 1474 069F 86 C4 1475 06AI 2A CO 1476 06A3 01 E8 1477 06A5 SO 1478 06A6 B2 03 1479 06A8 E8 08FE R
1480 06A8 6A CC 1481 06Ao 58 1482 06AE 03 EO
1483 06BO 48 1484 0681 50
1485 0682 E6 OS 1486 0684 EB 00 1487 0686 8A C4 1488 0688 E6 05 1489 068A FB 1490 068B 59
1491 06BC 58 1492 0680 03 C 1 1493 068F BO 02 1494 06CI E6 OA 1495
1496 06C3 73 as
1491 06C5 e6 06 0041 R 09 1498 1499 06CA 1500 06CA C3 1501 06C8
1502 1503 1504
1505 1506 1507 1508 1509 1510 1511 1512 OIbCB
1513 06C8 50 1514 ObCC E8 0913 R 1515 1516 1511 1518 06CF 8A 6E 01 1519 0602 E8 OAI4 R 1520 0605 58 1521 0606 72 18
1522 0608 88 06FO R 1523 0608 53 1524 1525 1526 1527 060C E8 09FO R
1528 OIbOF 88 Cib 1529 06EI 88 OF 1530 06E3 DO E4 1531 06E5 00 E4
1532 06El 80 E4 04 1533 OIbEA OA E3 1534 06EC E8 09FO R 1535 06EF 58 1536 06FO 1537 06FO C3 1538 06FI 1539 1540 1541 1542
1543
- - ,-PAG-E----- -- ---- --- - - - --------- - --------------- ---- - - -------- ~--
, OMA SETUP
I
I
- THIS ROUTINE SETS UP THE OMA FOR REAO/WRITE/VERIFY
;
OPERATIONS.
; ON ENTRY I
AL = OMA COMMAND
I
,, -O-N--E--X-IT--I ----- -_-O-S-K-E--TT-E-=S- -TA--TU--S-, --C-Y --R-E-FL-E-C-T---S-TA--TU--S--OF---O-P-E-R-A-T-IO--N- I
OMA SETUP
PROC
NEAR
-
eLI
OUT .!MP
DMA+12.AL 1+2
DISABLE INTERRUPTS ~URING DMA SET-UP SET THE FIRST/LAST F/F WAIT FOR I/O
OUT
OMA+ II,AL
OUTPUT THE MODE BYTE
C"P JNE
AL,42H NOT VERF
OMA VER I FY COMMAND NO
XOR
AX,AX
START ADDRESS
J"P NOT VERFI
SHORT .)33
-
MOV
AX,ES
ROL
AXil
GET THE ES VALUE ROTATE LEFT
ROL ROL
AX,I AX, ,
ROL
AX.I
.J33:
"OV ANa AOO
JNC INC
CH,AL
AL,' IIIOOOOB
J"AX,IBP+2]
CH
I GET HIGHEST NIBBLE OF ES TO CH ZERO THE LOW N 18BLE FROM SEGMENT TEST FOR CARRY FROM ADDITION
I CARRY MEANS HIGH 4 81TS MUST BE INC
PUSH
AX
I SAVE START ADDRESS
OUT
DMA+4,AL
OUTPUT LOW ADDRESS
J"P NOV
1+2 AL,AH
WAIT FOR I/O
OUT
DMA+4IAL
OUTPUT HIGH ADDRESS
NOV
ALICH
GET HIGH 4 81TS
J"P AND
1+2 AL,OOOOlll18
1/0 WAIT STATE
OUT
081H,AL
I OUTPUT HIGH 4 81TS TO PAGE REGISTER
DETERM I NE COUNT
MOV XCHG SUB SHR PUSH
"DV CA,-,NOV POP SHL DEC PUSH OUT
J"P NOV
OUT STI POP PDP AOO
"DV OUT
AX,SI AL,AH AL,AL AX, ,
AX DL,3 GET PA.RM CL.AH AX AX,CL AX AX oMA+5,AL 1+2 AL,AH DhlA+5,AL
CX AX AX,CX AL,2 Dh4A+l0,AL
I AL "' , OF SECTORS
I AH I: , OF SECTORS
I AL · 0, AX · , OF SECTORS I AX '" , SECTORS · 128 I SAVE' OF SECTORS· 128
I GET BYTESISECTOR PARAMETER
25.
I
I I
SHIFT COUNT (01:128,
AX = , OF SECTORS ·
I =256 ETC) 128
I SH I FT BY PARAMETER VALUE
I-I FOR DMA VALUE
I SAVE COUNT VALUE I LOW BYTE OF COUNT I WAIT FOR I/O
HIGH BYTE OF COUNT RE-ENA8LE INTERRUPTS RECOVER COUNT VALUE RECOVER ADDRESS VALUE ADO, TEST FOR 64K OVERFLOW MODE FOR 8237 INITIALIZE THE OISKETTE CHANNEL
JNC MOV
NO BAD
t CHECK FOR ERROR
.OSKETTE_S T ATUS. DMA_BOUNDARY
I SET ERROR
RET
I CY SET BY A80VE I F ERROR
oh4A_SETUP
ENOP
1-------- - - ----- - - - --------- - - - - --------------------------------
I NEC INIT
I
;
- THIS ROUTINE SEEKS TO THE REQUESTED TRACK AND
I
INITIALIZES THE NEC FOR THE READ/WRlTE/vERIFY/FORhiAT
OPERAT ION.
ON ENTRY:
AH I NEC COMMANO TO 8E PERFORMED
-:::: ::: ::::::: ON EXITs
.OSKETTE_STATUS. CY REFLECT STATUS OF OPERATION I
~~~~;~;;::::----:~~~-- --~~;~------------~ - -
- - - - --
CALL
MOTOR_ON
, TURN MOTOR ON FOR SPECIFIC DRIVE
1----- 00 THE SEEK OPERATION
NOV
CALL POP JC NOV PUSH
CH, IBP+ I]
SEEK
AX
ER I
BX";"OFFSET ER I
8X
-
I CH = TRACK'
I MOVE TO CORRECT TRACK
I RECOVER COMMAND
I ERROR ON SEEK
I LOAD ERROR AODRESS
t PUSH NEC_OUT ERROR RETURN
SEND OUT THE PARAMETERS TO THE CONTROLLER
CALL MOV
MOV
SAL SAL ANa OR CALL POP
NEC OUTPUT AX,!'I 8X,ol AH,I AH, ,
AH,OOOOO I OOB AH,BL
NaExC- OUTPUT
I OUTPUT THE OPERATION COMMAND
AH ,. HEAO ,
BL · DRIVE'
MOVE IT TO BIT 2
ISOLATE THAT 81T
OR I N THE DR I VE NUMBER
FALL THRU CY SET IF ERROR
THROW AWAY ERROR RETURN
RET
- ---- NEC_INIT
; ----
-
-
-
--
--E- N- D- P---
-
------
-
--
-
---------
---
-
-
-
-
----- --- ------
; RWV COM
, I
;
- THIS ROUTINE SENDS PARAMETERS TO THE NEC SPECIFIC
TO THE READ/WRITE/VERIFY OPERATIONS.
5-36 DIS~11nE(Ol/10/86)
IBM Personal Computer MACRO Assembler VersIon 2.00 DSKETTE -- 01/10/66 DISKETTE ADAPTER BIOS
1544 1545 1546
1541 06Fl 1548 06F 1 86 0126 R 1549 06F4 50
1550 06F5 8A 66 01 1551 06F8 E8 09FO R
1552 06FB 8B C6 1553 06FD E8 09FO R 1554 0700 8A 66 00
1555 0703 E8 09FO R 1556 0706 82 03 1557 0708 E8 06FE R 1558 070B E8 09FO R 1559 070E B2 04 1560 0110 Ee 06FE R
1561 0113 E8 09FO R 1562 0116 2E: 8A 61 05 1563011A 15&4 011A E6 09FO R 15&5011082 06 1566 011F E8 08FE R 1561 0122 E6 09FO R
1568 0125 58 1569 0126
1510 0126 C3 1571 0727 1572 1573 ISH 1575
1576 15n 1578 1579
1580 0127 1581 1582 1583 1584 0727 56 1585 0125 EB OABA R 1586 0728 9C 1587 072C EB OAE2 R 1588 012F 72 41
1589 0731 90 1590 0732 72 3C \591 1592
1593 159.... 0734 FC 1595 0735 BE 0042 R 1596 0738 AC
\597 0739 24 CO 1598 0738 74 33 1599 0730 3C 40
1600 073F 75 29 1601 1602 1603
1604 0141 AC
1605 0142 DO EO 1606 0744 B4 04 1601 0146 72 24 1608 0748 00 EO
1609 074A 00 EO 1610 074C B4 10 1611 074E 72 lC 1612 0750 DO EO
1613 0152 B4 06 1614 0154 72 16 1615 0156 DO EO 1616 0758 DO EO
1611075A8.... 04 1618 07SC 12 OE 1619 075E DO EO 1620 0160 84 03 1621 0762 12 08 1622 0164 DO EO
1623 0166 84 02 1624 0168 72 02
1625
1626 1627 076A
1628 016A B4 20 1629 016C 1630 016C 06 26 0041 R
1631 0770
1632 0770 80 3E 0041 R 01 1633 On5 FS 1634 On6 5E
1635 On7 C3 1636
1637 0116 1638 0118 90
1639 0119 EB F5 1640 0718 1641 1642 1643
1644 0718
1645 071B F6 06 008F R 01 1646 0180 14 3B 16.... 1 0182 80 3E 0041 R 00 1648 0181 75 34 1649 0789 80 80 0090 R 10 1650 018E F6 85 0090 R 04
1651 0193 15 28 1652 0195 8A 85 0090 R
1653 0799 24 CO 1654 0198 3C 80 16550190 15 19
1&5& 1&51
; ON ENTRY:
CS:BX = ADDRESS OF MEDIA/DRIVE PARAMETER TABLE
;
:
----- ONEXIT:
-----
-
-
---- --------- --- IIOSKETTE_STATUS, CV REFLECT
------------ -
-
-
S-T-A-T-U-S---O-F--O-P-E-R-A-T-I-ON-
-
RWV COM PROC
NEAR
-
MOV
AX. OFFSET ER 2
LOAD ERROR AoORESS
PUSH
AX
-
PUSH NEC OUT ERROR RETURN
MOV
AH, [8P+ 1 ]
OUTPUT TRACK ·
CALL
NEC OUTPUT
MOV
AX,SI
I OUTPUT HEAD ·
CALL
NEC OUTPUT
MOV
AH, T8P]
I OUTPUT SECTOR ·
CALL
NEC OUTPUT
MOV
DL,3
I BYTES I SECTOR PARAIETER FROM BLOCK
CALL
GET PARM
I · TO THE NEC
C"'LL
NEC-OUTPUT
I OUTPUT TO CONTROLLER
MOV
oL,4
I EOT PARAMETER FROM BLOCK
CALL
GET PARM
I · TO THE NEC
CALL
NEC-OUTPUT
I OUTPUT TO CONTROLLER
MOV
AH,eS: IBX}.ND_GAP
I GET GAP LENGTH
R15:
CALL
NEC OUTPUT
"OV CALL
oL,i GET PARM
DTL PARAMETER FROIro4 8LOCK TO THE NEC
CALL
NEC-OUTPUT
OUTPUT TO CONTROLLER
POP
AX -
THROW AWAY ERROR EX IT
RET
R;W--V-_C-O-M---EN-D--P----------------------------------------------------
; NEC TERN - THIS ROUTINE WAITS FOR THE OPERATION THEN ACCEPTS THE STATUS FROM THE NEC FOR THE READ/WRITE/VERIFY/
FORMAT OPERATION.
ON EXIT,
IIOSI(ETTE STATUS. CY REFLECT STATUS OF OPERATION I
I - - - ---- --- - - - - - - - - - - - - -::-- - - - - --------- - - - - - - - - - - - - - - - - -- -- -----
N E C _ TERM
PROC
NEAR
LET THE OPERATION HAFPEN
PUSH CALL PUSHF CALL ,JC POPF ,JC
S I WAIT_INT
RESULTS SET_END_POP
SET_END
SAVE HEAD " · OF SECTORS WAIT FOR THE INTERRUPT I GET THE NEC STATUS
I LOOK FOR ERROR
CHECK THE RESULTS RETURNED BY THE CONTROLLER
CLD
MOV
LODS AND
JZ
e"p
JNZ
S I ,OFFSET IINEC STATUS .NEC STATUS AL,1To000008 SET END
AL, '0 I OOOOOOB
JI.
SET THE CORRECT 0 I RECT I ON POINT TO STATUS FIELD GET STO TEST FOR NORMAL TERMINATION
TEST FOR ABNORMAL TERMI NAT I ON NOT ABNORMAL. BAD NEC
A8NORMAL TERMINATION, FINO OUT WHY
LODS SAL NOV JC SAL SAL
"OV JC SAL MDV JC SAL SAL NOV JC SAL NOV JC SAL MOV JC
IINEC STATUS AL,I-
AH,RECORD NOT FNO
..119
--
AL,I
AL,I
AH,BAO CRC
,J19
-
AL, I
AH,8AD OMA
..119
AL,I
AL, I
AH,RECORo NOT FNo
..119
-
AL,I
AH,WRITE PROTECT
JI9
AL.I
AH,8Ao ADDR MARK
..119 -
I GET STI
I TEST FOR EaT FOUND
I TEST FOR oMA OVERRUN
I TEST FOR RECORD NOT FOUND
TEST FOR WRITE_PROTECT
TEST MISSING ADDRESS MARl(
.J18:
NEC MUST HAVE FAILED
..119:
MOV
SET_ENO: OR
C"P CMC
POP
RET
AH,8AO_NEC
IIDSKETTE_STATUS ....H 1I0SKETTE_STATUS.I 51
SET ERROR CONO I T I ON
RESTORE HEAD ii, , OF SECTORS
SET END POP:
-POPF
J"P
SHORT SET END
NEC_TERM - - -- - - -E-N-D--P------ --- - - - -- -- - - - -------------------- - - --
- ------------------- -- ; DSTATE:
ESTABLISH STATE UPON SUCCESSFUL OPER...TION.
~ ~~~~~--;~~~ ----~~~~---- ---- - - ----- - - - - - - -
TEST JZ
CMP JNZ
~~ST
JNZ MOV AND
eMP ,JNE
IIHF CNTRL,DUAL SETBAC
1I0SKETTE STATUS.O SET8AC-
:g~~3~:i~lg:J:~~e:g~~
SETBAC
J AL,lIoSK SHTElOI
AL,RATE-MSK
AL.RATE-250 M_'2-
1 TEST CONTROLLER 1.0.
CHECK FOR ERROR
I F ERROR JUMP
I NO ERROR, MARK MEDI'" "'S DETERMINED
1 OR I VE DETERM I NED
? I IF DETERMINED NO TRY TO DETERMINE I LOAD STATE I I(EEP ONLY RATE I R ...TE 250 ? t NO MUST 8E 1.2M OR HI DATA RATE 80 TRK
CHECK FOR HIGH DATA RATE 80 TRACK
DISKETTE (01/10/86) 5-37
IBM Pe,.sonal COPllpute,. MACRO Assemble,. Ve,.s,Qn 2.00 DSKETTE -- 01/10/66 DISKETTE ADAPTER BIOS
1-16 01- 10-86
1656 1659 019F E8 08CF R 1660 01A2 12 14 1&61 01A4 3C 02 1662 01A6 14 10 1&63 01A8 3C 04 \664 OUA 14 OC 1&65 OlAC 1666 01AC 80 A5 0090 R FD
1661 018 I 80 80 0090 R 04
1668 0186 E8 as
1669 1610 0188
1611 61188 80 60 0090 R 06 1&12 1&1301BO 1614 0180 C3 1615 01SE
1616 1671 1618 1619 1680 1681
1682 1683 018E
1684 018E 80 3E 0041 R 00 1685 01C3 14 3E 1686 01C5 80 3E 0041 R 80 1681 01CA 14 37 1b88 OlCC 8A A5 0090 R 1689 0100 Fb C4 10 1690 0103 15 2E 1691 0705 80 E4 CO 1692 070e 8A 2E 008B R
1693 OTDC 00 C5 1694 alOE 00 C5 1695 OlEO DO C5 1696 01E2 DO C5
1691 01E4 80 E5 CO 1698 01El 3A EC 1699 01E9 14 18 1100 110 I 1102 1703 1704
1105 1106 01EB 80 FC 01 1101 01EE DO DC
110e 01FO eo E4 co
1109 01F3 eo A5 0090 R IF 1110 01F8 08 A5 0090 R
1111 01FC C6 Ob 0041 R 00 1712 0801 F9 1713 0802 C3 1714 IllS 0803
1116 0603 F8 1111 0604 C3 11180805 1119 1120
1121
1722 1723 1724 1725 1126 1721 1128 1129
1130 0805 1131 0805 32 CO 1732 0801 80 3E 0041 R 00 1733 080C 75 23
1734 080E B2 04 1135 0810 E8 08FE R 113608138A IE 0041 R 1731 0817 8B CE 1738 0819 3A 2E 0046 R 17390810 75 OB 1140 1141 081F 8A 2E 0045 R 1142 0823 3A 6E 01 1143 0826 14 04 11.4.4 ! 145 0828 02 DC 1146 082A 1141 082A 02 DC 1748 082C 11.49 082C 2A 5E 00 1150 082F 8A C3 1'751 1152 0831 1153 0831 C3 1154 0632 1155 1156 1151 1758 1159
1160 1161 1162 0832
1163 0832 82 02 1164 0834 50 1165 0635 E8 08FE R 11&& 0838 88 26 0040 R 1161 083C 58 1168 0830 8A 26 1169 08.41 OA E4 1110 0843 14 02
'11 I 0845 32 CO
CALL JC CMP JE CMP .JE
AND OR .IN.
CMOS TYPE M 12-
AL.2 N 12 A[.4
""_12
RETURN DRIVE TYPE IN IALl CIro40S BAD ASSUME DEF AUL T
TYPE 2 DRIVE? YES-->ASSUME MULTI FORIro4AT CAPABILITY TYPE 4 DRIVE?
YES-->ASSUME MULTI FORMAT CAPABILITY
:g~~-~~:~~m:) :~~~ 6~i-C~P~ARK DR :V~U~~T~~~I~~~MAT CAPABILITY
SHORT SETBAC
-
I BACK
OR
SETBAC I
RET
:-OS TATE ~~T~;
--END-P-----------------
-------------
-------------------
----
DETERMINES WHETHER A RETRY IS NECESSARY. IF RETRY IS
REQUIRED THEN STATE INFORMATION IS UPDATED FOR RETRY.
I I ON EXIT;
= CY I FOR RETRY, CY " 0 FOR NO RETRY
PROC
CMP .JZ CMP
JZ NOV TEST .JNZ AND NOV ROL ROL ROL ROL AND
CMP
.JE
NEAR
_OSKETTE STATUS,O
NO RETRY-
·
~gs~~~~~_STATUS, TIME_OUT
GET STATUS SUCCESSFUL
I IF
OF OPERAT I ON OPERATION TIME OUT NO RETRY
AH~_DSK STATE(O I) AH,Iro4ED liET
NO RETRY AH~RATE MSK CH,.LASTRATE
CH.I CH,I CH, I CH,I CH.RATE MSK CH,AH -
NO_RETRY
GET MEDIA STATE OF DRIVE
ESTABLISHED/DETERMINED? IF ESTABLISHED STATE THEN I SOLATE RATE GET START OPERATION STATE TO CORRESPONDING BITS
TRUE
ERROR
ISOLATE RATE BITS ALL RATES TRIED I F YES, THEN TRUE ERROR
SETUF' STATE INDICATOR FOR RETRY ATTEMPT TO NEXT RATE OOOOOOOOB 15001 -> 10000000B 1250) 10000000B 12501 -> 010000008 (3001 OIOOOOOOB (3001 -> 000000008 15001
CMP
AH.RATE 500 .. !
I SET CY FOR RATE 500
RCR
AH,I -
I TO NEXT STATE
AND
AH,RATE MSK
I KEEP ONLY RATE BITS
AND
_aSK STATE[DI) · NOT RATE MSK+OBL STEP
I RATE, DBL STEP OFF
OR NOV
:g~~;~;~T~4~~ls~~
-: ~~~~T5~T~~~SR~6~ RETRY
STe
-
I SET CARRY FOR RETRY
RET
I RETRY RETURN
NO RETRY;
-
CLC
RET
R1E-T-R-Y----E-N-D-P----------
CLEAR CARRY NO RETRY NO RETRY RETURN
; NUM TRANS
1
- THIS ROUTINE CALCULATES THE NUMBER OF SECTORS THAT
; ,
WERE ACTUALLY TRANSFERRED TO/FROM THE DISKETTE.
ON ENTRY;
(BP .. I J " TRACK
SI-HI · HEAD
[BP)
= START SECTOR
---- -------- -- ------------- -- ------ ; ON EX' T:
~~-;;~~~
AL " NUM8ER ACTUALLY TRANSFERRED ---~~~~----~E~~----
-
XOR
AL, AL
CMP
_DSKETTE STATUS,O
..JNZ MOV
NT OUT DL~4
CALL
GET PARM
MOV
BL,'iNEC STATUS .. 5
MOV
CX,SI -
CMP
CH,_NEC STATUS+.4
..INZ
OIF_HO -
CLEAR FOR ERROR
CHECK FOR ERROR 'F ERROR 0 TRANSFERRED SECTORS/TRACK OFFSET TO DL AH " SECTORS/TRACK GET ENDING SECTOR CH " HEAD. STARTED GET HEAD ENDED UP ON IF ON SAME HEAD, THEN NO AO..JUST
MOV CMP JZ
CH,.NEC STATUS+3 CH, (BP.!) SAME_TRK
GET TRACK ENDED UP ON I SIT ASKED FOR TRACK J F SAME TRACK NO INCREASE
ADD
BL,AH
· ADO SECTORS/TRACK
AOD
SAIro4E TRKI
-
SUB
NOV
BL.AH
BL, (BP) AL,BL
I ADO SECTORS/TRACK
1 SUBTRACT START FROM END I TO AL
NT_OUT:
RET
- ----------------- NUIro4 TRANS
- ; -_':'- ---
ENDP
-- ----------- - - - ----------------- ---
SETUP END
-RESTORES .MOTOR COUNT TO PARAMETER PROVIDED IN TABLE
ON EXI~~D LOADS .OSKETTE_STATUS TO AH, AND SETS CV.
---- ~ET~P
- ---- --- AH ··OSKETTE
~~D
~;o~
_
ST
ATUS. ~E;~
-C-V--R--E-FL-E-C--T--ST--A
T-U-S---OF--O--P-E-R-A-T-IO-N----
--
- MOV PUSH CALL 1ro40V POP ~~v
..JZ XOR
DL.2
AX
GET PARM
.MOTOR COUNT. AH
AX
-
:~::~SKETTE_STATUS
NUN ERR AL,AL
I GET THE 1ro40TQR WAIT PARAMETER I SAVE NUMBER TRANSFERRED
STORE UPON RETURN RESTORE NUt.4BER TRANSFERRED GET STATUS OF OPERATION CHECK FOR ERROR NO ERROR CLEAR NUIro4BER RETURNED
5-38 DISKEITE (01/10/86)
IBM Personal Computer MACRO Assembler Version 2.00 OSKETTE -- 01/10/86 DISKETTE ADAPTER 8105
1-11 01-10-86
1112 1113 0841 1114084180 FC 01 1115 084A F5 1116 0848 C3 1111 084C 1118
1119 1180 1181 1182 1183 1184 1185 084C 1186 084C F6 06 008F R 01 1181 0851 14 65 1188 0853 8A A5 0090 R 1189 0851 F6 C4 10 1190 085A 15 5C 1191 1192 1193
1194 085C C6 06 003E R 00 11950861 E8 0913 R 1196 0864 85 00 1191 0866 E8 OA14 R 1198 0869 E8 088A R 1199 086C 12 35 1800 1801 1802 1803 086E 89 0450 1804 0811 F6 85 0090 R 01 1805 0816 14 02 1806 0818 81 AO 1801 1808 1809 1810 1811 1812 081A 1813 081A 51 1814 0818 C6 06 0041 R 00 1815 0880 33 CO 1816 0882 00 EO 181108840000 1818 0886 DO DO 1819 0888 00 00 1820 088A 50 1821 0888 E8 OAI4 R 1822 088E 58 1823 088F 08 F8 1824 0891 E8 088A R 1825 0894 9C 1826 0895 81 El 00F8 1821 0899 90 1828 089A 59 1829 0898 13 08 1830 0890 FE C5 1831 089F 3A E9 1832 08Al 15 01 1833 1834 1835 1836 08A3
1831 08A3 F9 1838 08A4 C3 1839 1840 08A5 1841 08A5 8A OE 0045 R 1842 08A9 88 80 0094 R
1843 08AO 00 EO 1844 08AF 3A E9 1845 0881 14 05 1846 0883 80 80 0090 R 20 1841 1848 0888 1849 0888 F8 1850 0889 C3 1851 088A 1852 1853 1854 1855 1856 1851 1858 1859 1860 088A 1861 088A 88 08CE R 1862 0880 50 1863 088E 84 4A
1864 08CO E8 09FO R 1865 08C3 88 Cl 1866 08C5 8A EO 1861 08Cl E8 09FO R 1868 08CA E8 0121 R 1869 08CO 58 1810 08CE 1811 08CE C3 1812 08CF 1813 1814 1815 1816 1811 1818 1819 1880 1881 08CF 1882 08CF AO 00 lOR 1883 0802 24 C 1
1884 0804 00 E8
1885 0806 13 20
NUN ERR:
-
CMP
AH,I
I SET THE CARRY FLAG TO INDICATE
CMC
I SUCCESS OR FAILURE
RET
----- SETUP_END
; ----
-
-
-
-
-
-
-ENOP
- --
---
-
-
-
-
-
-
-
---
-------
-
-
-
----
------
-
-
-
-
--
-----
; SETUP 08L
;
-CHECK OOUBLE STEP.
; ON ENTRY:
01 = DRIVE
,I
;
-O-N-
-
EX
--
IT
---
:
-
-----
-CY
-
-
= --
I
-
-M-E-A-N-S--E-R-R-O-R-
--
-
-
--
------------------
------I
SETUP OBL
PROC
NEAR
- TEST
ClHF CNTRL,OUAL
I TEST CONTROLLER 1.0 ·
..JZ
~~~T
NO D8L
:~::~~KD~iATE[OI]
I NO DOUBLE STEPPING REQUIRED I ACCESS STATE , ESTABLISHEO STATE?
..JNZ
NO_OBL-
, IF ESTA8L1SHEO THEN DOUBLE DONE
; - - - - - CHECK FOR TRACK 0 TO SPEED UP ACKNOWLEDGE OF UNFORMATTED 0 I SKETTE
;-----
MOV CALL MOV CALL CALL
"C
ClSEEK STATUS,O MOTOR-ON CH,O
SEEK REAO 10 SO_ERR
SET RECALI8RATE REQUIRED ON ALL DRIVES ENSURE MOTOR ST AY ON LOAD TRACK 0 SEEK TO TRACK 0
READ 10 FUNCTION I F ERROR NO TRACK 0
INITIALIZE START AND MAX TRACKS (TIMES 2 FOR BOTH HEADS)
MOV
TEST ..JZ MOV
CX, 0450H
ClOSK STATE[OI], TRK CAPA
CNT ~K
-
CL, OAOH
I START, MAX TRACKS
1 TEST FOR 80 TRACK CAPABILITY 1 I F NOT COUNT I S SETUP , MAX I MUM TRACK 1.2MB
ATTEMPT READ 10 OF ALL TRACKS, ALL HEADS UNTIL SUCCESS, UPON SUCCESS.
MUST SEE IF ASKED FOR TRACK IN SINGLE STEP MODE = TRACK 10 READ 1 IF NOT
THEN SET 00U8LE STEP ON.
CNT_OK:
PUSH MOV
XOR SHR RCL
RCL RCL PUSH CALL POP OR CALL PUSHF ANO POPF POP
"NC INC CMP
"NZ
CX OOSKETTE STATUS,O AX,AX CH, I AL,' AL,I AL.I AX SEEK AX OI,AX REAO_IO
0[,11111011B
CX 00 CHK CH CH,CL CNT_OK
SAVE TRACK, COUNT CLEAR STATUS, EXPECT ERRORS CLEAR AX HALVE TRACK, CY .. HEAD
AX = HEAD IN CORRECT 81T
SAVE HEAO SEEK TO TRACK
= RESTORE HEAD
01 HEAD OR'ED DRIVE READ 10 HEAD 0 SAVE RETURN FROM READ 10 TURN OFF HEAD I 81T RESTORE ERROR RETURN RESTORE COUNT IF OK, ASKED. RETURNED TRACK? INC FOR NEXT TRACK I REACHED MAX I MUM YET I CONTINUE TILL ALL TRIED
FALL THRU, REAO 10 FAILED FOR ALL TRACKS
STC RET
SET CARRY FOR ERROR SETUP_ OBL ERROR EX I T
MOV MOV SHR CMP
"Z
OR
CL,ClNEC STATUS+3 ClOSK TRK[DI] .CL CH,I
CH,CL NO OBL ClOSK_STATE[OI] ,DBL_STEP
LOAD RETURNED TRACK STORE TRACK NUMBER HALVE TRACK I SIT THE SAME AS ASKED FOR TRACK I F SAME THEN NO DOUBLE STEP TURN ON DOUBLE STEP REQUIRED
CLC
1 CLEAR ERROR FLAG
RET
,-SETUP_OBL -------
-
-
-----E-N- O- P-
-
-
-
-
--
-
--
-----------
---
--
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
----
, READ /0
I
,
- READ 10 FUNCTION.
; ON ENTRY:
01 = BIT 2 '" HEADI BITS 1.0 = DRIVE
; ON EXIT:
01 s BIT 2 IS RESET, 81TS 1,0. DRIVE
; ;
-
-
-
-
--
-----
-
-
-
-
------ ClOSKETTE
-
-::-
-S-T-A-TU- -S-, -C-Y--R-E-F-L-E-C-T---ST-A-T-U-S---OF--O--P-E-R-A-T-iO-N-
-I
READ 10 PROC
NEAR
-
MOV
AX, OFFSET ER 3
1 MOVE NEC OUTPUT ERROR ADDRESS
PUSH
AX
MOV
AH,4AH
READ 10 COMMAND
CALL
NEC OUTPUT
TO CONTROLLER
MOV
AX,DI
DRIVE' TO AH, HEAD 0
MOV
AH,AL
CALL
NEC OUTPUT
TO CONTROLLER
CALL POP
NEC-TERM AX
.AIT FOR OPERATION, GET STATUS THROW AWAY ERROR ADDRESS
RET
---- REAO_IO
; --
-
ENOP
----
-
-
-----
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
---
----
------
----------
--
; CMOS TYPE
,
- RETURNS DISKETTE TYPE FROM CMOS
: ON ENTRY:
01 = DRIVE.
I
; ON t~~;
-E~;X;I~T-: ------A;~L~~=-T-Y-P-~E~; ~~CY--R-E--FL-E-C-T-S--S-T-A-T-U-S-------
-------------
-
MOV
AND
SHR
..JNC
AL,8YTE PTR ClEQUIP FLAG
AL,110000018
-
AL,I
TYP_ZERO
LOAD EQUIPMENT FLAG FOR. DISKETTES
KEEP DISKETTE DRIVE 81TS
ARE THERE ANY DRIVES INSTALLED?
NC-->NO DR I VES TYPE ZERO
DIS~11nE(Ol/10/86) 5-39
IBM P."llgn.l Comput.e .. MACRO Alllle",ble,. Ve .. !!,gn 2.00 DSKETTE -- 01/10/86 DISKETTE ADAPTER BIOS
1-18 01-10-66
1886 0608 DO CO
1887 OSoA DO CO T S88 080C 00 CO 1889 OSOE 32 E.
1890 OSEO 38 C7 1891 08E2 72 ,.
1692 OBE. F6 06 008F R 0' 1893 06E9 75 10 169. 08EB F6 65 0090 R 0 I 1695 06FO BO 01 IB96 OBF2 H 06 1697 OaF. BO 03 1898 08F6 E8 02 1899 08F8
1900 OBF8 32 CO 1901 08FA 1902 08FA C3 1903 08FB 190. 08FB F9 1905 08FC EB FC 1906 oaFE 1907 1908 1909
1910 1911 1912 1913 1914
1915 1916 1917 1918 1919
1920 oaFE 1921 oaFE IE 1922 08FF 56
1923 0900 2B CO 1924 0902 8E 06 1925 0904 87 03 1926 0906 2A FF
1927 1928 0906 C5 36 0078 R
1929 090C 8A 20 1930 090E 67 03
1931 0910 5E 1932 091 \ IF
1933 0912 C3
1934 1935 0913 1936 1937
1938 1939 19.0 19.1 19.2 1943 194.
1945 1946 1947
1948 1949
1950 1951
1952 1953
195. 1955 i956 0913 1957 091353 1958 0914 E6 095E R 19590917 72 43 1960 0919 E8 0432 R 1961 091C B8 90Fo 1962 091F CO 15
1963 0921 9C 196. 0922 E8 0.0. R 1965 0925 90 1966 0926 73 05 1967 0925 E8 095E R 1968 092B 72 2F 1969
'970 0920
1971 0920 B2 OA 1972 092F E8 OBFE R 1973 0932 8A C4 197. 0934 32 E4 1975 0936 3C 08 1916 0938 73 02
19l1 093A 80 06 1978 1979 1980
1961 093C 50 1962 0930 BA F424
1963 09.0 F7 E2 1964 0942 6B CA
1985 094. 6B DO 1986 0946 Fe 1987 0947 01 02 1986 0949 01 0 I 1989 0948 84 86 1990 0940 CO 15
1991 094F 56 1992 0950 73 OA 1993
1994 1995 1996 0952
1997 0952 89 20SE 1996 0955 Ee 0000 E 1999 0956 FE C8
R"'
AL,t
ROTATE TO ORIGINAL POSITION
ROL
AL,t
ROTATE BITS 6 AND 7 TO 0 ANO I
ROL
AL, I
XOR
AH,AH
I AX::NUM8ER OF DRIVES
C"P
AX,ol
I S DR I 'IE REQUE STED PRE SENT
oC
TEST oNZ TEST
TYP ZERO
~~~=CNTRL, DUAL
C-->REQUESTED DRIVE NOT PRESENT TEST CONTROLLER 1.0.
J, .DSK_STATE[DI TRK_CAPA I TEST FOR 80 TRACKS
"OV
AL, I
, DRIVE TYPE HAS 40 TRACKS
oZ
CRI
"OV
AL,3
I DRIVE TYPE HAS 80 TRACKS
O"P
SHORT CR 1
TYP ZERO:
-
XOR
AL.AL
DR[VE TYPE 0
CRI:
EX[T W[TH AL=TYPE ACCORDING TO TRACKS
RET
CR2:
STC
..JMP
CRI
, EXIT WITH CARRY IF DUAL CARD
C; M- -O-S-_-TY- P-E-----
-
-
-
--ENDP
--
-
---------
----
-
---
-
-
-
-
-----
-
-
-
-
-
-
-
-
-
-
-
------
GET PARM
- THIS ROUTiNE FETCHES THE INDEXED POINTER FROM THE
D[SI'\ 8ASE BLOCK POINTED TO 8Y THE DATA VARIABLE
.0 I si( PO INTER. A BYTE FROM THAT TABLE I S THEN MOVED
INTO AH, THE INDEX OF THAT BYTE BEINC THE PARAMETER
IN DL.
ON ENTRY:
DL :: 1NOEX OF BYTE TO BE FETCHED
ON EXIT;
AH " THAT BYTE FROM BLOCK
b~~ -;;~~--------A;~L~,D~H--D-E-S~TER;O~-Y-ED--
------------- -------------- -----
-
PUSH
OS
PUSH
S I
SU8
AX,AX
o , 810S DATA AREA
MOV
OS,AX
XCHC SUB
DX,BX BH.BH
= BL '" INDEX
8X
INDEX
ASSUME OS: A8S0
LOS
SI ,ClDISK POINTER
J PO I NT TO BLOCK
MOV
AH,[SI+SX]
I GET THE WORD
XCHG
OX .BX
I RESTORE BX
POP
SI
POP
OS
RET
ASSUME DS:OATA
GET PARM
ENOP
1--::"----- - - - ---------- -- - - - - ----------- --------------- - - -- - -- - - --------
MOTOR ON
I
-TURN MOTOR ON AND WAIT FOR h40TOR START UP TIME. THE ClMOTOR COUNTI
IS REPLACED WITH A SUFFICIENTLY HIGH NUMBER 10FFHI TO ENSURE
THAT THE MOTOR DOES NOT CO OFF DURING THE OPERATION. IF THE
MOTOR NEEDED TO BE TURNED ON, THE MULTITASKING HOOK FUNCTION
IAX=90FoH. INT 15H) IS CALLED TEL.LING THE OPERATING SYSTEM
THAT THE BIOS IS ABOUT TO WAIT FOR MOTOR START UP. IF THIS
FUNCTION RETURNS WITH CY .. I, IT MEANS THAT THE MINIMUM WAIT
HAS BEEN COMPLETED. AT TH I 5 PO I NT A CHECK I S MADE TO ENSURE
THAT THE MOTOR WASN'T TURNED OFF BY THE TIMER. IF THE HOOK 010 I
NOT WAIT. THE WAIT FUNCTION (AH::086HJ IS CALLED TO WAiT THE
PRESCRIBED AMOUNT OF TIME. IF THE CARRY FLAG IS SET ON RETURN.
IT MEANS THAT THE FUNCTION IS IN USE AND 010 NOT PERFORM THE
WAIT. A TIMER 1 WAIT LOOP WILL THEN DO THE WAIT.
ON ENTRY I
01 :: DRIVE'
- -- -- -- ---- ---- - ----------- ----- ON EXIT:
AX,CX.DX DESTROYED
- - ~~~~~ ~~ - - - - ;~~~ ----~~;~ - - - - -
-
----- ---
-
- PUSH CALL. ,JC
CALL MOV INT PUSHF CALL
POPF ..JNC CALL. ,JC
BX
SAVE REC.
TURN ON
TURN ON MOTOR
MOT IS ON
iF CY::1 NO WAIT
XLAT OLD
TRANSLATE STATE TO COMPATIBLE MODE
AX,090FDH
LOAD WAIT CODE & TYPE
15H
TELL OPERATING SYSTEM ABOUT TO DO WAIT
SAVE CY FOR TEST
XLAT_NEW
I TRANSLATE STATE TO PRESENT ARCH.
1 RESTORE CY FOR TEST
M WAI T , BYPASS LOOP I F OF SYSTEM HANDLED IA I T
TURN ON
I CHECK AGA I N I F MOTOR ON
MOT_IS_ON
; IF NO WAIT MEANS IT [S ON
"OV CALL MOV XOR CMP JAE
"OV
oL.IO tiET PARM
AL,AH AH,AH
AL,a OP2 AL,8
I CET THE MOTOR .AIT PARAMETER
= AL ";MOTOR WA I T PARAMETER
AX MOTOR WA I T PARAMETER SEE IF AT LEAST A SECOND IS SPECIFIED IF YES. CONTINUE ONE SECOND WA I T FOR MOTOR START UP
;----- AX CONTAINS NUMBER OF 1/8 SECONDS 1125000 MICROSECONDS) TO WAIT
GP2:
PUSH
"OV
"UL "OV "OV CLC RCL RCL MOV INT
POP oNC
AX DX.625QO DX CX,DX DX.AX
oX.1 CX.l AH,86H 15H AX MOT_iS_ON
SAVE IAIT PARAMETER
LOAD LARGEST POSSIBLE MULTIPLIER MULTIPLY BY HALF OF WHAT'S NECESSARY CX :: HltiH WORD CX.OX :: 1/2 · I t OF MICROSECONoSI CLEAR CARRY FOR ROTATE
DOUBLE LOW WORD. CY CONTAINS OVERFLOW DOUBLE HI, INCLUDING LOW WORD OVERFLOW LOAD WA I T CODE PERFORM WA I T RESTORE WAIT PARAMETER CY MEANS WA I T COULD NOT BE DONE
FOLLOW ING LOOPS REQU I REO WHEN RTC WA I T FUNCTION I S ALREADY I N USE
,J13:
MOV
CALL DEC
CX.6286
WAITF AL
WAIT FOR 1/8 SECOND PER (AL) COUNT FOR 1/6 SECOND AT 15.065731 US GO TO FIXED WAIT ROUTlNE DECREMENT TIME VALUE
5-40 DISKETTE (01/10/86)
IBM Personal Cornput.r MACRO Aaa.lllbler Veraoon 2.00 DSKETTE -- 01/10/86 DISKETTE ADAPTER 810S
1-19 01-10-86
2000 095A 75 F& 2001
2002 095C 2003 095C 58 2004 0950 C3 2005 095£ 2006 2007
2008 2009 2010
2011 2012
2013 2014 2015 2016 095E 2011 095E 88 OF 2018 0960 8A C8 2019 0962 DO C3 2020 0964 DO C3
2021 0966 00 C3 2022 0968 DO C3 2023 096A FA 2024 0969 C6 06 0040 R FF 2025 0970 AO 003F R
202& 0913 24 30 2027 0975 84 01 2028 0977 02 E4 2029 2030 2031 20::12 2033 2034 0919 3A C3 2035 0918 75 06
2036 0970 84 26 003F R 2037 0981 15 31 2038
2039 098:3 2040 0983 OA E3 2041 0985 8A 3E 003F R
2042 0989 80 E7 OF 2043 098C 80 26 003F R CO 2044 0991 08 26 003F R
2045 0995 AO 003F R 2046 0998 8A 08 2047 099A 80 E3 OF 2048 0990 F8
2049 099E 24 3F 2050 09AO DO CO 2051 09A2 DO CO 2052 09A4 DO CO 2053 09A6 DO CO 2054 09A8 OC OC 2055 09AA BA 03F2
2056 09AO EE 2051 09AE 3A DF 2058 0980 74 02 2059 0982 F8 2060 099:3 C3 2061
2062 09B4 2063 99B4 F9 2064 0985 FB
2065 0986 C:3 2066 0981
2067 2068 2069 2070 2071
2072 2073 2074
2075 0981 2016 0981 B2 09 2077 0989 E8 08FE R 2078 098C F6 06 003F R 80 2079 09Cl 14 09 2080 09C3 80 FC OF 2081 09C& 13 08 2062 09C8 84 OF 208:3 09CA E8 04 2084 09CC
2085 09CC OA E4 2086 09CE 14 IF 2087 2088 2089 2090 0900
2091 0900 6A C4 2092 0902 32 E4 2093 09D4 50
2094 09D5 8A 03E8 2095 09D8 F7 E2 2096 09DA 88 CA 2097 090C 88 DO 2098 09DE 84 86 2099 09EO CD 15
2100 09E2 58 2101 09E3 73 OA 2102
210309E5 2104 09E5 89 0042 2105 09E8 E8 0000 E 2 I 06 09EB FE C8
2107 09EO 75 F6 2108 09EF 2109 09EF C3
211009FO 2111 2112
2113
JNZ
, ARE WE DONE YET
MOT IS ON: - - POP
RET MOTOR_ON
8X ENDP
r RESTORE REG.
1- - - - - - ----------- ------------.-------------------- - - - - - - - - -----
; TURN ON
,
, I
- TURN MOTOR ON AND RETURN WAIT STATE.
,; ON ENTRYl
01 " DRIVE II
; ON EXIT:
CY " 0 MEANS WAIT REQUIRED
;
CY " I MEANS NO WA I T REQU I RED
l
AX,9X,CX,DX DESTROYED
I
I - - - - - - - - - - - - - - - - ---- - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - .--------- - - -
TURN ON PROC
NEAR
-
MOV
MOV
ROL
8X,Ol CL.8L 8L,I
BX = DRIVE II CL = DRIVE II BL = OR I VE SELECT
ROL
8L.1
ROL
BL,I
ROL
BL.I
eLi
NO INTERRUPTS WHILE DETERh4lNING STATUS
MOV MOV
:~~!~~'i'g~u~i A~~~H
ENSURE h40TOR STAYS ON FOR OPERATION GET 0 I G I TAL OUTPUT REG I STER REFLECT I ON
AND
AL, 00 I 100008
KEEP ONLY DRIVE SELECT BITS
MDV
AH, I
h4ASK FOR DETERM I N I NG MOTOR 8 [T
SHL
AH,CL
AH · MOTOR ON, A=OOOOOOOI, 8=00000010
AL " DRIVE SELECT FROM .NOTOR STATUS
BL " DRIVE SELECT DESIRED
AH = h40TOR ON MASK DES I REO
CMP
JNZ TEST JNZ
AL,BL TURN IT ON AH,.QOTOR STATUS NO_h40T_WATT
REQUESTED DR I VE ALREADY SELECTED ? I F NOT SELECTED JUMP TEST MOTOR ON 81 T
JUMP I F MOTOR ON AND SELECTED
TURN_IT ON, -OR
MDV
AND AND DR
MDV MDv AND
STI AND ROL RDL ROL ROL OR MOV
OUT eMP
JZ
eLe
RET
AH,8L
AH · OR I VE SELECT AND h40TOR ON
:~:~~gb~~T~~ATUS
SAVE COPY OF .MOTOR STATUS BEFORE KEEP ONL Y 1.40TOR B I T1
:=gig=-~~:i~~:!~ OOOOOOB
CLEAR OUT OR I VE SELECT AND h40TORS OR IN OFII VE SELECTED
AL,Clh40'fOR STATUS
BL,AL
BL,ooeOIIII!
J GET DIGITAL OUTPUT REGISTER REFLECTION
: ~~~~h4g~~~-~6~6~SB~~~ER. 8H=BEFORE
J ENABLE INTERRUPTS AGA I N
AL,OOIII I I 19
I STRIP AWAY UNWANTED 81TS
AL, I
J PUT BITS IN DESIRED POSITIONS
AL, I
AL, I
AL, !
AL,OOOOIIOOB
NO RESET, ENABLE Dh4A1INTERRUPT
DX,03F2H
SELECT OR I VE AND TURN ON MOTOR
DX,AL
BL,9H
NEW MOTOR TURNED ON ?
NO_MOT_WAIT
NO WAIT REQUIRED IF JUST SELECT
SET CARRY MEANING WAIT
NO h40T WAiT;
-
- STC
SET NO WAIT REQUIRED
ST I RET
I NTERRUPTS BACK ON
TURN_ON ENDP
J -------- ------------- - - - - - -- -- --- ------------- ------------- --- I HD WAIT
; -
WAIT FOR HEAD SETTLE Tlh4E.
I ; ON ENTRY:
01 I DRIVE II
I
- ,; --O-N
-
-EXITl
-- --
----
-
-
-A-X-,B-X--,C-X--,D-X--D- E-S-T-R-O-Y-E--D-
--
-
-
-
---
---
-----
---------
I
HO WAIT
-
MOV
CALL
TEST JZ CI.4P
JAE
MOV
....IMP ISNT WRITE:
- OR
JZ
PROC
NEAR
OL,9
; PO I NT TO HEAD SETTLE PARAMETER
GET PARh4
I GET PARAMETER
.MoToR STATUS,10000000B I SEE IF A WRITE OPERATION
ISNT WRITE
AH · .-g
I I F NOT, 00 NOT ENFORCE ANY VALUES , IS WAIT 15 h4lLLISECONDS OR GREATER?
00 WAT
I I F THERE DO NOT ENFORCE
AH715
I HEAD SETTLE 1141 N I h4UM
SHORT DO_WAT
I 00 WAIT OPERATION
AH,AH HW_OONE
I CHECK FOR WA I T TO BE ZERO
r IF NOT WRITE AND 0 THEN EXIT
;----- AH CONTAINS NUh4BER OF h4lLLlSECONDS TO WAIT
MOV XOR PUSH .OV MUL MOV MOV MOV
'NT PDP JNe
AL,AM
AH,AH AX OX.IOOO OX CX,DX OX,AX AH,86M 15H AX HW_DONE
; AL · , h4lLLISECONDS
AX = II h4lLLISECONDS SAVE MEAD SETTLE PAAAlIo4ETER SET UP FOR I.4ULTIPLY TO MICROSECONDS
OX, AX = II 1141 CROSECONDS
CX, AX = II 1141 CROSECONOS CX,DX '" II MICROSECONDS LOAD WA I T CODE PERF'ORh4 WA I T
RESTORE HEAD SETTLE PARAMETER CHECK FOR EVENT IA IT ACTI VE
J29:
1 MILL I SECOND LOOP
.OV
CX,66
COUNT AT 15.065731 US PER COUNT
CALL
IA ITF
DELAY FOR I MILL I SECONO
DEC
AL
DECREMENT THE COUNT
"NZ
J29
DO AL MILLISECOND, OF Tlh4ES
HI DONE:
-
RET
- - --HD_WAiT
; ---
-
-
-
-
-
---
-
E-N-O-P---
-------------
--
----
--
-
-----------------
-
-
; NEC OUTPUT
;
- TH I S ROUT I NE SENDS A 8YTE TO THE NEC CONTROLLER AFTER
DISKETTE (01/10/86) 5-41
IBh4 P."~on.1 Comput.,. h4ACRO A~~.,"bl.,.
V.,..;on 2.00
DSKETTE -- 01/10/156 DISKETTE ADAPTER BIOS
1-20 01-10-86
211. 2115 2116 2117 2118 2119 2120 2121 2122 2123 212.
2125 2126 2121 2128 2129 213009FO 2131 09FO 53
2132 09Fl 8A 03F. 2133 09F. B3 02 213. 09F6 33 C9 2135 2136 09F8 EC 2137 09F9 24 CO
2138 09FB 3C 80 2139 09FD 14 OF
2140 09FF E2 F7 2141
2142 OAOI FE CB 21.3 OA03 75 F3 214. 2145 2146
21.7 OA05 80 OE 00.1 R 80 2148
21.9 OAOA 58 2150
2151 OA08 58 2152 OAOC F9 2153 OAOD C3 215. 2155 2156 2151 OA.OE 8A C4
2158 OA10 42 2159 OAII EE 2160 2161 OAI2 5B 2162 OAI3 C3 2163 OAI. 2164 2165 2166
2161 2168 2169 2170 2171 2172 2173 217. 2115 2116 21110A1. 2178 OAI. 8B OF 2119 OAI6 BA OA1B R 2180 OAI9 52 2181 OAIA 80 01
2182 OAIC 86 CB 2183 OA1E 02 CO 2184 OA20 86 CB 2185 OA22 84 06 003E R 2186 OA26 15 21 2181 2188 OA28 08 06 003E R 2189 OA2C E8 OA 1C R 2190 OA2F 13 OA 2191 2192 2193 219. OA31 C6 06 0041 R 00 2195 OA36 E8 OA 7C R 2196 OA39 12 3F 2197 2198 OA3B
2199 OA3B 83 FF 01 2200 OA3E 17 21 220 I OA.O C6 85 009. R 00 2202 OA.5 OA ED 2203 OA.7 H 2C 2204 2205 2206 2207 OA49
2208 OA49 83 FF 01 2209 OA4C 71 13 2210 OA4E F6 85 0090 R 20 2211 OA53 74 02
2212 OA55 DO E5 2213
221. OA51 3A AD 009. R 2215 OA58 HID 2216 2217 OA5D 88 AD 009. R 2218 OA61 2219 OA61 51 2220 OA62 B. OF 2221 OA64 E8 09FO R 2222 0,A67 88 OF 2223 OA69 8A E3 222. OA6B E8 09FO R 2225 OA6E 58 2226 OA6F E8 09FO R 2227 OA 12 E8 OA93 R
TEST I NG FOR CORRECT DIRECT I ON AND CONTROLLER READY THIS ,
ROUTINE WILL TIh4E OUT IF THE BYTE IS NOT ACCEPTED WITHINI
A REASONABLE Ah40UNT OF TIME, SETTING THE DISKETTE STATUS,
ON COMPLETION.
,
ON ENTRY:
AH = BYTE TO BE OUTPUT
ON EXIT,
CY · 0 SUCCES S
CY = I FAILURE -- DISKETTE STATUS UPDATED
I F A FA I LURE HAS OCCURRED, THE RETURN IS h4ADE
ONE LEVEL HIGHER THAN THE CALLER OF NEC OUTPUT.
THIS REh40VES THE REQUIREMENT OF TESTING-AFTER
EVERY CALL OF NEC OUTPUT.
~EC
- ---- AX,eX,DX DESTROYED
~~~;~~ ------;~~C
~E~~
----------------
--
------------------
-
PUSH
BX
MOV
DX,03F4H
h40V
BL. 2
XOR
CX, CX
SAVE REG. STATUS PORT HIGH ORDER COUNTER COUNT FOR TIME OUT
J23:
IN AND
C"P JZ LOOP
AL,DX
AL,' 1000000B AL. 10000000B J2J J23
GET STATUS KEEP STATUS AND DIRECTION STATUS 1 AND DIRECTION 0 ? STATUS AND DIRECTION OK
CONT I NUE TI LL CX EXHAUSTED
DEC JNZ
BL J23
FALL THRU TO ERROR RETURN
= a DECREMENT COUNTER
REPEAT TILL DELAY FINISHED. CX
OR
OOSKETTE_STATUS, TIME_OUT
PDP
8X
I RESTORE REG.
POP
AX
STC
RET
DISCARD THE RETURN ADDRESS INDICATE ERROR TO CALLER
1----- DIRECTION AND STATUS OKI OUTPUT BYTE
J27:
"OV INC
OUT
AL.AH OX DX,AL
I GET BYTE TO OUTPUT
= , DATA PORT STATUS PORT", I
I OUTPUT THE BYTE
POP RET NEe_OUTPUT
BX ENDP
I RESTORE REC.
I CY = 0 FROM TEST INSTRUCTION
SEEK
THIS ROUTINE WILL MOVE THE HEAD ON THE NAMED DRIVE TO THE NAMED TRACK. I F THE OfU VE HAS NOT BEEN ACCESSED I SINCE THE DRIVE RESET COMMAND WAS ISSUED, THE DRIVE WILL BE RECALIBRATEO.
I ON ENTRY:
= DI DRIVE II
I
I I ON EXIT:
CH = TRACK II
,
9DSKETTE STATUS, CY REFLECT STATUS OF OPERATION.,
---- - -- ---------- ----- I
~EE~
AX.BX,cx7ox DESTROYED ;~~C ~ ~E~;-
MOV MOV PUSH
NOV XCHG ROL XCHG TEST JNZ
aX,ol
OX,OFFSET NEC ERR
ox
-
AL.I
CL.Bt...
AL.CL
CL,BL
AL,OSEEK STATUS
J28A
-
= ax = DRIVE II
I LOAD RETURN ADDRESS I ON STACK FOR NEC_OUTPUT ERROR I ESTABLISH "'ASK FOR RECALIBRATE TEST I GET DRIVE VALUE INTO CL ; SHIFT MASK BY THE DR I VE VALUE
I RECOVER TRACK VALUE I TEST FOR RECALIBRATE REQUIRED
I JUMP IF RECALIBRATE NOT REQUIRED
OR CALL JNC
ClSEEK STATUS.AL RECAL-
AFT _RECAL
TURN ON THE NO RECALIBRATE BIT IN FLAG RECAL I BRA TE OR I VE RECAL I BRATE DONE
ISSUE RECA.LIBRATE FOR 80 TRACI( D'SKETTES
"OV CALL
JC
ClOSKETTE STATUS,O RECAL RB
; CLEAR OUT INVALID STATUS ; RECALIBRATE DRIVE I IF RECALIBRATE FAILS TWICE THEN ERROR
- C"" AFT RECALl JA "OV OR
JZ
01,1 R8 ODSK_TRK[Dll,O CH.CH DO_WAIT
I IF REQUEST FOR DRIVE )0 2 I DO SEEK EVERY TIME I SAVE NEW CYLINDER AS PRESENT POSITION
I CHECK FOR SEEK TO TRACK 0
I HEAD SETTLE, CY = 0 I F JUMP
DR IVE IS IN SYNCHRONIZATION W'TH CONTROLLER, SEEK TO TRACK
J28A:
C"P JA TEST
JZ SHL
01,1 R6 ClOSK_STATE[DI] .DBL_STEP RJ CH, I
"'E IF REQUEST FOR DRIVE )0 2
DO SEEK EVERY T I CHECK FOR DOUBLE STEP REQU I REO SINGLE STEP REQUIRED BYPASS DOUBLE
DOUBLE NUh4BER OF STEP TO T At<;E
R7 :
C"P
eH.ODSK_TRKrOI]
JE
RB
MOV
OOSK_TRK[DI).CH
R8:
PUSH
CX
MOV
AH.OFH
CALL MOV
NEC OUTPUT
ex.ol
MOV
AH,BL
CALL
NEC_OUTPUT
POP
AX
CALL
NEC OUTPUT
CALL
CHK::::STAT_2
SEE I F ALREADY AT THE DES I RED TRACK IF YES. 00 NOT NEED TO SEEK
I SAVE NEW CYLINDER AS PRESENT POSITION
SAVE CYL 1NOER II SEEK COMMAND TO NEC
,8X=DRIVE' , OUTPUT DR I VE NUMBER
; RESTORE CYL I NDER II FOR NEC OUTPUT
, ENDING INTERRUPT AND SENSE STATUS
r"'\
5-42 DISKETfE (01/10/86)
IBM Person.1 Computer MACRO Asselllbler VerSIon 2.00 OSKETTE -- 01/10/86 DISKETTE ADAPTER BIOS
1-21 01-10-86
2228 2229 2230 2231 OA15 2232 OA 75 9C 2233 OA76 E8 0987 R 2234 OA79 90 2235 OA1A 2236 OA7A 58 2237 OA78 2238 OA78 C3 2239 OA7C 2240 2241 2242 2243 2244 2245 2246 2247 2248 OA 7C 2249 OA7C 51 2250 OA 10 B8 OA91 R 225 I OA80 50 2252 OA81 B4 07 2253 OA83 E8 09FO R 2254 OA86 88 OF 2255 OA88 8A E3 2256 OA8A E8 09FO R 2257 OA80 E8 OA93 R 2258 OA90 58 2259 OA91 2260 OA91 59 2261 OA92 C3 2262 OA93 2263 2264 2265 2266 2267 2268 2269 2210 2211 2272 OA93 2273 OA93 88 OA81 R 2274 OA96 50 2275 OA97 E8 OA8A R 2276 OA9A 72 14 2277 OA9C 84 08 2278 OA9E E8 09FO R 2279 OAA 1 E8 OAE2 R 2280 OAA4 72 OA 2281 OAA6 AO 0042 R 2282 OAA9 24 60 2283 OAA8 3C 60 2284 OAAD 74 03 2285 OAAF F8 2286 OA80 2281 OABO 58 2288 OA81 2289 OAB I C3 2290 2291 OA82 2292 OAB2 80 OE 0041 R 40 2293 OA87 F9 2294 OA88 EB F6 2295 OABA 2296 2297 2298 2299 2:300 2301 2302 2303 2304 OA8A 2305 OA8A FS 2306 OASS F8 2301 OABC B8 9001 2308 OA8F CD 15 2309 OACI 72 11 2:310 2311 OAC:3 B3 04 2312 OAC5 33 C9 2313 OAC7 2:314 OAC7 F6 06 003E R 80 2315 OACC 75 OC 2316 OACE E2 F1 2317 OADO FE C8 2318 OA02 75 F3 2319 2320 OAD4 80 OE 0041 R 80 2321 OA09 F9 2322 OADA 2323 OADA 9C 2324 OAOB BO 26 OO:3E R 7F 2325 OAEO 90 2326 OAE 1 C3 2327 OAE2 2328 2329 2330 2331 2332 2333 2334 2335 2336 OAE2 2337 OAE2 57 2338 OAE3 BF 0042 R 2339 OAE6 B3 07 2340 OAE8 8A 03F4 2341
;----- WAIT FOR HEAD SETTLE
DO WAIT:
-
PUSHF
SAVE STATUS
CALL
HD_WA I T
WAIT FOR HEAD SETTLE TIME
POPF
RESTORE STATUS
RS:
POP
, CLEAR ERROR RETURN FROM NEC_OUTPUT
NEC ERR:
-
RET
I RETURN TO CALLER
- S; E-E-K-----
--ENDP
--
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
----
--
----------
---------
-
-
-
-
-
-
--
,; RECAL
;
RECALl8RATE DRIVE
; ON ENTRY
= 01
DRIVE II
ON EXIT:
-
-
--C-Y---R--E-F-LE--C-T-S--ST-A-T-U-S-
-
OF
--
---- OPERATION.
---- ---
-----------
----
RECAL PROC
NEAR
PUSH
CX
MDV
AX. OFFSET RC BACK
; LOAD NEC_OUTPUT ERROR
PUSH
AX
MDV
AH.07H
RECALIBRATE COMMAND
CALL
NEC OUTPUT
MOV
BX.OI
IBX=ORIVE#
MOV
AH,BL
CALL
NEC OUTPUT
I OUTPUT THE DR I VE NUMBER
CALL POP
CHK-STAT 2
AX -
-
I GET THE INTERRUPT Alii) SENSE INT STATUS I THROW AWAY ERROR
RC BACK:
-
POP
RET
- - R:E-C--A-L---E--N-DP-- ------------- --------------------- --------- -- ----
CHK STAT 2
- THIS ROUTINE HANDLES THE INTERRUPT RECEIVED AFTER
RECALIBRATE, SEEK. OR RESET TO THE ADAPTER. THE
INTERRUPT IS WAITED FOR, THE INTERRUPT STATUS SENSED, AND THE RESULT RETURNED TO THE CALLER.
, ,
; ON EXIT:
.DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION. I
~~~-;T~~-;------P~~C----~~;~-------------------------------------
-
MOV
PUSH
CALL ..JC
MOV
CALL
CALL
..JC
MOV
AND
CMP
.JZ
CLe
.J34:
POP
CS BACK:
-
RET
AX,OFFSET CS BACK
AX
WAIT INT ..J34 -
AH,08H NEC OUTPUT RESUL TS
.J34
AL, .NEC ST ATUS
AL, 0 1 100000B AL,01100000B
.J:35
AX
I LOAD NEC_OUTPUT ERROR ADDRESS
IA I T FOR THE INTERRUPT I F ERROR, RETURN I T SENSE I NTERRUPT STATUS COMMAIII)
I READ I N THE RESULTS
GET THE FIRST STATUS BYTE [SOLATE THE B[TS TEST FOR CORRECT VALUE [F ERROR, GO MARK [T GOOD RETURN
I THROW AWAY ERROR RETURN
..J351
OR
ClOSKETTE STATUS,BAO SEEK
STC
-
-
I ERROR RETURN CODE
.JMP
SHORT .J34
C1H-K-_-S-T-A-T-_-2-------E-N-D--P-------------------------------- -------- ----
1 IAIT INT
t
- THIS ROUTINE WAITS FOR AN INTERRLPT TO OCCUR A TIME OUT I
ROUTINE TAKES PLACE DURING THE WAIT, SO THAT AN ERROR
MAY BE RETURNED IF THE DRIVE IS NOT READY.
,
i ON EXIT:
ClOSKETTE_STATUS, CY REFLECT STATUS OF OPERATION. I
~;~;-~~~--------;~~C----~~;~-------------------------------------
-
ST[
CLC
MOV
r NT
.JC
AX,09001H 15H .J36A
TURN ON INTERRUPTS, .JUST IN CASE CLEAR TIMEOUT INDICATOR LOAO WAIT CODE AND TYPE PERFORM OTHER FUNCT rON BYPASS TIMING LOOP IF TIMEOUT DONE
.J36:
MOV XOR
TEST "NZ LOOP DEC "NZ
.J36A:
OR
STe
.J31 :
PUSHF
AND
POPF
RET
WAIT INT
BL,4 CX,CX
CLEAR THE COUNTERS FOR 2 SECOND WA I T
oSEEK _STATUS, I NT_FLAG
"37 "3. BL J3.
I TEST FOR INTERRUPT OCCURR I NG
COUNT DOWN WHILE WAITING SECOND LEVEL COUNTER
- .OSKETTE STATUS, T I ME_OUT
I NOTH I NG HAPPENED
ERROR RETURN
.SEEK_STATUS.NOT ENOP
I SAVE CURRENT CARRY
[NT FLAG
I TURN OFF INTERRUPT FLAG
-
I RECOVER CARRY
; GOOD RETURN CODE
RESULTS
t
THIS ROUTINE WILL READ ANYTHING THAT THE NEC CONTROLLER I
RETURNS FOLLOW I NG AN INTERRUPT.
,
ON EXIT:
.DSKETTE STATUS. CY REFLECT STATUS OF OPERATION.:
~~~~~~s-;~~~
----AX, 8 ~~;;
X--, C-X---;-D-X--D-E-S-T-R-O-Y--ED-----
--
--
-------------------
I
PUSH MOV MoV
MOV
01
01 ,OFFSET ClNEe STATUS
BL,7
-
DX,03F4H
POINTER TO DATA AREA MAX STATUS 8YTES STATUS PORT
DISKETTE (01/10/86) 5-43
IBN PersorHiI Computer MACRO Assembler Venpon 2.00 DSKETTE - 01/10166 DISKETTE ADAPTER BIOS
1-22 01-10-86
2342 2343 2344 OAEB B7 02
2345 OAEO 33 C9 2346 OAEF
2347 OAEF EC 2346 OAFO 24 CO
2349 OAF2 3C CO 2350 OAF4 74 DE
2351 OAF6 E2 Fl
23S2 2353 OAF6 FE CF 2354 OAFA 75 F3
2355 2356 OAFC 80 DE 0041 R 80 2351 0801 F9
2358 OB02 EB I B 2359 2360 2361
2362 OB04 2363 OB04 42 2364 OB05 EC 2365 OB06 88 05 2366 OB08 41 2367
2366 OB09 B9 0002 2369 OBOe E8 0000 E
2370 080F 4A 2311 OBIO Ee 2312 OBII A8 [0 2373 OB13 74 OA 2374 2375 OB15 FE C8
2376 OBll 15 02 2377 OBI9 80 DE 0041 R 20 2378 OBIE F9 2379 2380
2381 2382 OBIF
2383 OB1F 5F 2384 OB20 C3 2385 0821
2386 2381
2388 2389 2390 2391
2392 2393
2394 2395 2396 2397 0821
2398 0821 E8 0913 R 2399 0824 BA 03F7 2400 OB27 EC
2401 OB28 A6 80 2402 OB2A C3 2403 082B 2404 2405 2406
2407 2408 2409 2410 24110B2B
2412 OB2B E8 0913 R 2413 OB2E E8 OA7C R 2414 OB31 12 3E 2415 OB33 B5 30 2416 OB35 E8 OAI4 R 2417 OB38 72 37
2418 OB3A B5 OB 2419 083C
2420 083C FE CO 2421 OB3E 78 26 2422 OB40 51 2423 OB41 E8 OAI4 R
2424 OB44 12 2C 2425 0846 88 0811 R 2426 OB49 50 2427 OB4A B4 04 2428 OB4C E8 09FO R 2429 084F 8B C7
2430 0851 I5A EO 2431 OBsa E8 09FO R
2432 085& E6 OAE2 R 2433 0859 56 2434 OBSA 59
2435 OBSB F6 06 0042 RIO 2436 OB60 14 DA 2431 OB62 OA ED
2438 0864 74 06 2439 2440 2441
2442 0866 2443 0866 80 80 0090 R 94 2444 OB68 C3 2445 2446 086C
2447 OB6C 80 80 0090 R 01 2448 OB71 2449 OB71 C3
2450 2451 0812 2452 OB72. 59 2453 0873 C3 2454 2455 0874
WA I T FOR REQUEST FOR MASTER
RIO: Ja91
MOV XOR
IN ANa CMP "Z LOOP
BH t 2 CX.CX
AL.DX AL, 11 OOOOOOB AL,l 1000000B
"42
"39
HIGH ORDER COUNTER
COUNTER WAIT FOR MASTER GET STATUS
, KEEP ONLY STATUS AND DIRECTION
STATUS I AN~ 0 I RECTI ON 0 STATUS AND DIRECTION OK LOOP TILL TIMEOUT
OEC JNZ
BH J3.
DECREMENT HIGH ORDER COUNTER REPEAT TILL DELAY DONE
; -----
OR STC JMP
.DSKETTE_STATUS t TIME_OUT
I SET ERROR RETURN
SHORT POPRES
I POP REG I STERS AND RETURN
READ IN THE STATUS
J421
INC IN MOV
INC
OX
ALtDX
[01 J,AL
01
POINT AT DATA PORT GET THE DATA STORE THE BYTE I NCREMENT THE PO INTER
MOV CALL OEC IN TEST
"Z
CX,2 WAITF OX AL,DX AL. 000 I OOOOB POPRES
MINIMUM 12 MICROSECONDS FOR NEC WAIT 15 TO 30 MICROSECONDS
POINT AT STATUS PORT GET STATUS TEST FOR NEC STILL BUSY RESULTS DONE ?
DEC
"NZ OR STC
BL RIO .OSKETTE_STATUS ,BAO_NEC
DECREMENT THE STATUS COUNTER GO BACK FOR MORE TOO MANY STATUS BYTES SET ERROR FLAG
RESULT OPERAT I ON I S DONE
POPRES;
POP
01
RET
I RETURN WITH CARRY SET
- ---- RESULTS
; --
-E-N-O-P-------
-----
---
-
-
--
-
-
-
---
---
--- -------------- -------
READ DSKCHNG
I
- READS THE STATE OF THE DISK CHANGE LINE.
ON ENTRY:
01 = DRIVE.
ON EXIT:
01 z: DRIVE'
ZF = 0 : DISK CHANG~ LlPE INACTIVE
ZF = 1 I DISK CHANGE LINE ACTIVE
~~~~
-~;~~~~~
---
---- ---- ------ AX.CX,DX DESTROYED
-;~~~
~~~R
-------------------------
-
-
CALL
MOTOR ON
I TURN ON THE MOTOR I F OFF
MOV
DX.OarlH
I ADDRESS DIGITAL INPUT REGISTER
IN
AL,DX
I INPUT DIGITAL INPUT REGISTER
TEST
AL.DSK_CHG
I CHECK FOR DISK CHANGE LINE ACTIVE
RET
I RETURN TO CALLER WITH ZERO FL.AG SET
R1E-A--D=-DS-K-C-H-N-G---- -E-N-D-P------------- --- --------------------------- --
1 DRIVE DET
1
, I
I
-DETERMINES WHETHER DRIVE IS 80 OR 40 TRACKS AND UPDATES STATE INFORMATION ACCORDINGLY.
I 6~
- ---- ON ENTRY:
~;~ ~~;
01 = DRIVE.
---;~~~-- ~ ~ ~~~~
------------------------------------
- CAL.L. CALL JC
~~~L
JC MOV SK_GIN: DEC
"S PUSH CALL
"C
MOV PUSH MOV CALL
MDV
MOV CALL CALL POP POP TEST
"Z
OR
"Z
NOTOR ON RECAL.DO BAC
~~~~RK_SLAP
DO BAC CH7QU I ET_SEEK+ I
CH IS 40 CX
SEEK
POP BAC
AX, OFFSET DO BAC
AX
~~c S~~~~O~RV_ST
AX.DI AH,AL NEC OUTPUT RESUL TS
AX CX ONEC STATUS,HOME SK GIN CH7cH
IS_60
TURN ON MOTOR I F NOT ALREADY ON RECALIBRATE DRIVE ASSUME NO DR I VE PRESENT
SEEK TO TRACK 48
ERROR NO DR I VE
SEEK TO TRACK 10
DECREMENT TO NEXT TRACK END LOOP IF CYL I NDER COUNT NEGAT I VE SAVE TRACK
POP AND RETURN
LOAD NEC OUTPUT ERROR ADDRESS
SENSE DRIVE STATUS COMMAND BYTE OUTPUT TO NEC
AL = DRIVE
AH " DRIVE
OUTPUT TO NEC
GO GET STATUS
THROW AWAY ERROR ADORESS
RESTORE TRACK
TRACK 0 ?
GO TILL TRACK 0
IS HOME AT TRACK 0 ?
MUST BE 80 TRACK DR I VE
DRIVE IS A 3601 SET DRIVE TO DETERMINEDI
SET MEDIA TO DETERMINED AT RATE 250.
OR
RET
OR
RET
POP BACs
-
POP
RET
J. OOSK_STATE[DI TRK_CAPA I SETUP 80 TRACK CAPABILITY
CX
I THROW AWAY
5-44 DISKETTE (01/10/86)
IBM Pep"sonal Computep" MACRO A ·· e ...blep" Vep"Slon 2.00 DSKETTE -- 01/10/86 DISKETTE ADAPTER 8105
1-23 01-10-86
2456 2457 2458 2459 2460 2461 2462 0874 2463 0874 F8 2464 0875 50 2465 0876 IE 2466 OB77 E8 0000 E 2467 087A 80 OE 003E R 80 2468 OB7F 1F 2469 .OB80 80 20 2470 0882 E6 20 2471 OB84 B8 9101 2472 OB87 CD 15 2473 OB89 58 2474 OB8A CF 2475 OB8B 2476 2477 2478 2479 2480 2481 088B 2482 OB88 50 2483 OB8C 53 2484 OB8D 51 2485 OB8E 52 2486 OB8F 57 2487 OB90 56 2488 OB91 IE 2489 0892 E8 0000 E 2490 OB95 80 OE OOAO R 01 2491 OB9A C7 06 0090 R 0000 2492 08AO 80 26 0088 R 33 2493 08A5 80 OE 008B R CO 2494 OBAA C6 06 003E R 00 2495 08AF C6 06 0040 R 00 2496 OB84 C6 06 003F R 00 2497 0889 C6 06 0041 R 00 2498 088E AO 0010 R 2499 OBC 1 DO CO 2500 OBC3 DO CO 2501 08C5 24 03 2502 08C7 32 E4 2503 08C9 33 FF 2504 OBCB BE 00 I 0 2505 ,OBCE 2506 OBCE F6 06 008F R 01 2507 OB03 75 05 2508 OB05 C6 85 0090 R 94 2509 OBOA 2510 OBOA 50 251 1 OBOB E8 OB2B R 2512 OBOE E8 0432 R 2513 OBEI 23360042 R 2514 OBE5 58 2515 08E6 47 2516 OBE7 3B F8 2517 OBE9 76 E3 2518 OBEB 2519 OSEB C6 06 003E R 00 2520 OBFO 80 26 OOAO R FE 2521 08FS E8 0832 R 2522 08F8 72 05 2523 OSFA OB F6 2524 OBFC 75 01 2525 OBFE F9 2526 08FF 2527 OBFF 1F 2528 acoo 5E 2529 OCO 1 5F 2530 OC02 SA 2531 OC03 59 2532 OC04 5B 2533 OC05 58 2534 OC06 C3 2535 OC07 2536 OC07 2537
1------------------------------ --- ------ ----------------- --- ----
, DISK INT
I
- THIS ROUTINE HANDLES THE DISKETTE INTERRUPT.
I
,
; ON EXITI
THE INTERRUPT FLAC; [S SET IN ClSEEK STATUS.
I
I - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- --- --- - ':'- - - - - - - --- -- -
DISK INT 1
PROC
FAR
; ENTRY POINT FOR ORG OEF57H
- STI
I RE-ENASLE INTERRUPTS
PUSH
AX
I SAVE WORK REG I STEFl:
PUSH
OS
I SA V~ REG I ST~RS
CAll
DDS
I SETUP DATA ADDRESSING
~~p
~~EEK_STATUS, INTflAG : ~~~~O~~ ~~~~R~~~T OCCURRED
MOV
AL. EO I
I END OF I NTERRUPT MARKER
OUT MOV
INTAOO,Al
AX, 091 a I 101
; INTERRUPT CONTROL PORT I NTERRUPT POST CODE AND TYPE
INT
15H
GO PERFORM OTHER TASK
POP
AX
RECOVER REGISTER
1RET
RETURN FROM INTERRUPT
: -; -- - DISK INT_l
ENDP
- - ~~~~~~~ ~~~~;
-
- - - - - - - - -- - - ------
-
-
-
-
--
-----------
THIS ROUTINE DOES A PRELIMINARY CHECK TO SEE WHAT TYPE I
- -- -- -- ------------------------ --------- ;
OF Dl SKETTE DRIVES ARE ATTACHED TO THE SYSTEM.
~s~~~~~-~~~~; ;~~~--
~~~R
-PUSH
AX
; SAVE REGISTERS
PUSH
BX
PUSH
CX
PUSH
OX
PUSH
01
PUSH
S I
PUSH
DS
CALL OR
~~~
DDS
I POINT DATA SEGMENT TO BIOS DATA AREA
ClRTC WAI T FLAG. a 1
I NO RTC WA IT. FORCE USE OF LOOP
:~~~~~~~E~~~~-~~~~EM~K+S~N6N~~~AL:Z~L~!~T;iART & SEND
OR
ClLASTRATE,SEND MSK-
I INITIALIZE SENT TO IMPOSSIBLE
MOV
ClSEEK STATUS,O-
I INDICATE RECALIBRATE NEEDED
MOV MOv
ClMOTOR COUNT,O ClMOTOR-STATUS,O
I INITIALIZE MOTOR COUNT I INITIALIZE DRIVES TO OFF STATE
MOV
ClDSKETTE STATUS,O
I NO ERRORS
MOV
AL,BYTE PTR ClEQUIP FLAG I GET EQUIPMENT STATUS
ROL
AL,I
-
I SHIFT BITS 7,6 TO 1,0
ROL
AL,I
AND
AL,3
, MASK DRIVE BITS
XOR
AH,AH
, AX=NUMSER OF DRIVES{RELATIVE ZERO)
XOR
01,01
, DI=INITIAL DRIVE TO 8E ESTABLISHED
MOV
SI,HOME
I S I =HOME MASK FOR ALL DR I VES
SUPO:
TEST
;~~TCNTRL,DUAL
I TEST CONTROLLER TYPE
JNZ
SUP1 :
"OV
ClDSK_STATE[DI] ,DRV_DET+MED_DET+RATE_250
PUSH
AX
SAVE DRIVE COUNT
CALL
DRIVE DET
DETERMINE DRIVE
CALL
XLAT OLD
TRANSLATE STATE TO COMPATI8LE MODE
AND POP
SI,.ORo PTR .NEC STATUS
AX
-
AND ClNEC STATUS WITH HOME MASK RESTORE I5RIVE COUNT
'Ne eMP JNA
01 DI,AX SUPO
POINT TO NEXT DRIVE I REPEAT FOR EACH DR I VE
SUP21
MOV AND CALL
Je
ClSEEK STATUS.O
~~~~pW~~~_FLAG, OFEH
HOME I5K
FORCE RECAL I BRATE ALLOW FOR RTC WA I T VAR I OUS CLEANUPS EX[T WITH CY FLAG FROM
SETUP
END
DR
Sl,sT
TEST HOME INDICATORS FOR ALL-DRIVES
JNZ
HOME_OK
5Te
I ERROR-->HOME INDICATOR BAD
HOME OK 1
-
POP
OS
I RESTORE CAllERS RES I STERS
POP
51
POP
01
POP
OX
POP
ex
POP
BX
PDP
AX
RET
DSKETTE SETUP ENOP
CODE -ENDS
END
DISKETTE (01/10/86) 5-45
IBM Peri5on.1 Computer MACRO A ·· embler Version 2.00 KEYBRD --- 01/10/86 KEYBOARD ADAPTER BIOS
I-I 01-10-56
I 2 3 4
I.·S
··7
"12
I.13
I. IS
I17.
19 20 21 22 23 24
225. 227.
29 30 31 32 33
3' 3S 3.
337.
.,.30'
'2
..·4·3
·4 · ·
47
4' 50 51 52 53 54 55
5.5.
57
.,59
60
..······23·····7
70 71 72 73
74 75
76 77 18 0000 19 0000 FB 80 0001 IE 81 0002 53 82 0003 51 83 0004 E5 0000 E 84 0001 OA E4 85 0009 74 26 86 OOOB FE CC 81 0000 74 37 88 OOOF FE CC 89 00111464 90 0013 80 EC 03 91 0016 74 64 92 00 I 8 80 EC DB 93 OOIB 74 DC 94 0010 FE CC ~5 OOIF 74 11. 96 0021 FE CC 97 0023 14 39 95 0025 99 0025 59 100 0026 5B 101 0021 IF 102 0025 CF 103
104 105
106 0029 E5 009E R 101 002C E5 0001 R 108 002F EB F4
10' liD 0031E5009ER 111 0034 E5 OODC R 112003172F5 113 0039 EB EA 114
PAGE 118,121
TITLE KEYBRD - - - 0 I /10 /56 KEYBOARD ADAPTER B I OS
; ---- I NT 16 - - - - - - - - - ----------------------- ----- - - - - - - - - - - - - ----------
I KEYBOARD 110
I
;
THESE ROUTINES PROVIDE KEYBOARD SUPPORT
,; INPUT (AHI =0 READ THE NEXT ASC I I CHARACTER STRUCK FROM THE KEYBOARD I
RETURN THE RESULT IN (ALI, SCAN CODE IN (AH)
(AH) .1 SET TI-£ I FLAG TO INDICATE IF AN ASCII CHARACTER IS
AVAILABLE TO BE READ.
IIFI=I -- NO CODE AVAILABLE
IIFI=O - CODE IS AVAILABLE
JF IF = 0, THE NEXT CHARACTER I N THE BUFFER TO BE READ
I SIN AX. AND THE ENTRY REMA I NS I N THE BUFFER
RETURN THE CURRENT SHIFT STATUS IN AL RECiISTER
THE BIT SETTINGS FOR THIS CODE ARE INDICATED IN THE
THE EQUATES FOR OKB FLACi
(AH) =5 PLACE ASCII CHARACTERISCAN CODE COMBINATION IN KEYBOARD
BUFFER AS IF STRUCK FROM KEYBOARD
ENTRY: EXIT:
ICLI = ASCII CHARACTER
{CHI " SCAN CODE
= (ALI = OOH SUCCESSFUL OPERATION
(AL I = 01 H = UNSUCCESSFUL - BUFFER FULL
{AHI" 1OH EXTENDED READ INTERFACE FOR THE ENHANCED KEYBOARD IAH)"IIH EXTENDED ASCII STATUS FOR THE ENHANCED KEYBOARD.
OTHERWISE SAME AS FUNCTION AH" I IAHI,,12H RETURN THE EXTENDED SHIFT STATUS IN AX REGISTER
AL " BITS FROM OKB FLAG, AH = BITS FOR LEFT AND RIGHT CTL ANO ALT KEYS FROM OKB_FLAG_I AND .KB_FLAG_3
EXITI
1-7-1-6-1-5-1-4-1-3-1-2-1-1-101
AH REGISTER
I I I I I I I I I I I I
1
L:::::: ~~~~ ~~~~~~~T~E~H:~/~~~Ei;EgEPRESSED
I I I I L:::::::::: ~:g~i ~~~~~~~T~E~H:;TD~~~Ei~EgEPRESSED
I I !_:::::::::::::: ~~~O~~C~O~~YK~~ ~~p~~:~~~SED
1 .----------------- CAPS LOCK KEY IS DEPRESSED ,------------------- SYSTEM KEY IS DEPRESSED
--- 11--16--1-5 -1-4 -1-3-12- 11101
AL REGI STER
1 II
I I
I I
I I
1 ,----- RIGHT SHIFT KEY
IS DEPRESSED
I 1 I 1 ,------- LEFT SHIFT KEY I S DEPRESSED
1 1 I · --------- CONTROL SHIFT KEY I S DEPRESSED
I 1 · ----------- ALTERNATE SHIFT KEY I S DEPRESSED I .------------- SCROLL LOCK STATE HAS BEEN TOGGLED
1 · --------------- NUM LOCK STATE HAS BEEN TOGGLED
I .----------------- CAPS LOCK STATE HAS BEEN TOGGLED
.------------------- INSERT STATE IS ACTIVE
OUTPUT
AS NOTED ABOVE. ONLY AX AND FLAGS CHANGED
; ;
--------A-L-L--O-T-H-E-R--R-E-G-I-S-TE-R-S--
P-R-E-S-E-R-V-E-D------------------------------------
EXTRN EXTRN EXTRN
ODS INEAR RESETINEAR BEEPINEAR
PUBLIC KEYBOARD 10 I
PUBLIC KB_INT_'-
.LlST
CODE
SEGMENT BYTE
PUBL I C
ASSUME CS:COOE,DSIDATA
KEYBOARO 10 I PROC
FAR
5TI
PUSH PUSH PUSH CALL
OS ex
cx
DDS
OR JZ DEC JZ DEC JZ
AH,AH
K I AH K2 AH K3
SUB
AH.3
JZ SUB JZ
K500 AH,OBH KIE
DEC JZ DEC JZ
AH K2E AH K3E
KID EXITI
-
POP
PDP
.XCX
PDP
OS
IRET
INTERRUPTS BACK ON
SAVE CURRENT OS
SAVE BX TEMPORARILY
ESTABLISH POINTER TO DATA
AH"O
ASCII READ
AH=I
ASCII STATUS
AH.. 2
SHIFT_STATUS
AH,,5
KEYBOARD WR I TE
AH=10
EXTENDED ASC I I READ
AH"II -
EXTENDED ASCII STATUS
AH=12 -
EXTENDED_ SH I FT_ STATUS
REGION
RECOVER REG I STER RECOVER SEGMENT
a I NVAL I COMMAND
ASCII CHARACTER
KIE:
CALL CALL
J"P
KIS KID E XLAT K IO::::EilT
GET A CHARACTER FROM THE BUFFER I EXTENDED I ROUTINE TO XLATE FOR EXTENDED CALLS GIVE IT TO THE CALLER
KI:
CALL CALL JC
J"P
KIS KID S XLAT K I KID_EXIT
GET A CHARACTER FROM THE BUFFER
ROUTINE TO XLATE FOR STANDARD CALLS
CARRY SET MEANS THROW CODE AWAY
5-46 KEYBOARD (01/10/86)
IBM Pe ... sonal Compute ... MACRO Al5l5e...bler Version 2.00 KEYBRO --- 0 I f I 0/86 KEYBOARD ADAPTER B]OS
, -2 01-10-86
I11I5.
I 17 003B E8 00C4 R 118 003£ 74 18 11900409C 120 0041 E8 0001 R
1210044EBII
'22 123 0046 E8 00C4 R 124 0049 74 00 125 004B 9C 126 004C E8 OODC R 127 004F 73 00 128 0051 90 129 0052 E8 009E R 130 0055 EB EF
'"132 0057 90
133 oose 59
134 0059 5B 135 005A IF 136 005B CA 0002
11'3"3"'
140 005E 141 005E 8A 20 0018 R 142 0002 80 E4 04 143 0065 BIOS 144 0007 02 E4
\ 45 0009 AD 00 I 8 R 140 OOoC 24 73 147 006E OA EO 148 0070 .1.0 0096 R 149 0073 24 OC
150 0075 OA EO
1510077A00017R 152 007A EB A9 ,53
IS'
155 150 007C
157 007C 56 158 0070 FA
159 007E 88 IE OOIC R 160 0082 8B F3
161 0084 E8 0114 R 162 0087 3B IE 001A R 163 0088 74 OB 164 0080 89 OC 165 008F 89 IE OOIC R 166 0093 2A CO
167 0095 E8 03 90 168 0096 109 0098 BO 01
170 009,A. 171 009,., FB
172 009B 5E
17''73 009C EB 87
! 75 009E
ASCII STATUS
K2E:
CALL .JZ PUSHF CALL .JMP
K2S K2B
KID E XLAT SHoifT-K2A
I TEST FOR CHARACTER IN 8UFFER iEXTENDED) I RETURN IF BUFFER EIo4PTY I SAVE ZF FROM TEST I ROUT I NE TO XLATE FOR EXTENDED CALLS I GIVE IT TO THE CALLER
K2,
CALL
K2S
.JZ
K2B
PUSHF
CALL .JNC
KID 5 XL AT K2A -
POPF
CALL
K 15
..JMP
K2
TEST FOR CHARACTER IN BUFFER RETURN I F BUFFER EMPTY SAVE ZF FROM TEST ROUTINE TO XLATE FOR STANDARD CALLS CARRY CLEAR MEANS PASS VALID CODE
INVALID CODE FOR THIS TYPE OF CALL THROW THE CHARACTER AWAY CO LOOK FOR NEXT CHAR I I F ANY
K2AI K2BI
POPF
POP
CX
POP
BX
POP
OS
RET
2
I RESTORE IF FROM TEST
RECOVER REG I STER RECOVER SEGMENT THROW AWAY FLAGS
SH I FT STATUS
K3E: K3:
MOV AND MoV
SHL MOV ANO OR NOV AND OR MOV
JMP
AHoOKB FLAG I AHoSYS-SHIFT CL o 5 -
AH,CL AL I OKB FLAG 1 AL , 011To0118 AH,AL ALoOKB FLAG 3 AL,OOOOIIOOB
AH,AL AL,OKB FLAG K [O_EXTT
GET THE EXTENDED SHIFT STATUS FLAGS GET SYSTEM SHIFT KEY STATUS MASK ALL BUT SYS KEY BIT SH I FT THE SYSTEM KEY BIT OVER TO
BIT 7 POSITION GET SHIFT STATES BACK
~~~~~N~~~ ~~~;:~~:~6oe7~~DT~i~T~H AND
GET RIGHT CTL AND AL T El....IMINATE LC EO AND LC EI OR THE SHIFT-FLAGS TOGi!THER GET THE SHIFT STATUS FLAGS RETURN TO CALLER
INS_SHIFT
; ------ WR I TE TO KEYBOARD BUFFER
K500 :
K5021 K5041
PUSH CLI NOV MOV CALL CNP JE NOV MOV SUB JMe
MOV
51
BX,[IIBUFFER TAll....11 GET THE "IN TO· POINTER TO THE BUFFER
SI,BX
-
I SAVE A COPY IN CASE BUFFER NOT FULL
K4
: BUMP THE PO I NTER TO SEE 'F BUFFER I S FULL
~~;,1"BUFFER_HEAD~ I ~~'sL _T7~F~~~F~~L~~~R~~NE~~O=E STORE THI S1
[SI]oCX
I NO - PUT THE ASClliSCAN CODE INTO BUFFER
[.SUFFER_TAIL] ,ex, ADJUST" IN TO" POINTER TO REFLECT CHANGE
AL,AL
; TELL CALLER THAT OPERATION .AS SUCCESSFUL
K504
I SUB INSTRUCTION ALSO RESETS CARRY FLAG
AL,OIH
I BUFFER FULL INDICATION
RETURN TO CALLER WITH STATUS IN AL
KEYBOARD (01/10/86) 5-47
ISM Per-sonill COlllput ... r- MACRO Assembler- V.r-sion 2.00 KEYBRD --- Ol/lO/!!6 KEYBOARD ADAPTER BIOS
11. 1I11T.
119 180 lei
182 183 164 165
166 167 166 169
190 191
192 193 194
195 196 191
'"I ··
200 201 202 203 204 205 206 207 206
209 210 211 212 213 214
215 216 217 216
219
220 221 222 223 224
225 226 227 226 229 230 231 232 233
234 235 236
237 236 239 240 241
242 243 244 245 24. 247 246 249 250
251 252 253 254 255 256
257 258
259
009E 009E 8B IE OOIA R 00A23B IE OOIC R 00Af, 75 05
OOAe Be 9002 OOAB CD 15 00 AD OOAo F8 OOAE 90 OOAF FA 0080 es IE 001A R 0084 3S IE OOIC R 00B6 74 F3 OOSA 8B 07 OOSC E8 0114 R OOBF 89 IE OOIA R 00C3 C3 00C4
00C4 00C4 FA 00C5 88 1E 001 A R 00C9 3B 1E 001 C R OOCO 88 01 OOCF FS 0000 C3 0001
0001 0001 3C Fa 0003 75 06 0005 OA E4 0007 H 02 0009 32 CO 0008 0008 C3
OODC OOOC- 60 FC EO OOoF 75 12 OOE 1 3C 00 00E3 H 09 00E5 3C OA 00E7 74 05 00E9 B4 35 OOEB EB 23 90 OOEE B4 I C OOFO EB 1E 90
00F3 60 FC 64 00F6 77 I A
OOF! 3C FO OQFA 15 07 OOFC OA E4 OOFE T4 10 0100 EB 10 90
0103 3C EO 0105 75 09 0107 OA E4 01091405 010B 32 CO
0100 EB a I 90
0110
a I 10 F8 at 1 I C3
0112 0112 F9 0113 C3
PAGE ,------ READ THE KEY TO FIGURE OUT WHAT TO DO -----------------------
KIS
PRoe MOv eMP
JNE
NEAR
BX, ClSUFFER HEAD I GET PO I NTER TO HEAD OF BUFFER
BX.ClBUFFER-TA1L I TEST END OF BUFFER
KIT
-
; IF ANYTH I NG I N BUFFER oONT DO INTERRUPT
KIT: KI S
MOV INT
STI Nap eLI MOV eMp JE MOV CALL NOV RET ENDP
AX.09002H 15"
BX ,.BUFFER HEAD
8X, .8UFFER-TAl L
KIT
AX, [BX]
K4
ClSUFFER_HEAo.BX
MOVE IN WAIT CODE & TYPE PERFORM OTHER FUNCT ION
ASCII READ I NTERRUPTS BACK ON OUR I NG LOOP ALLOW AN I NTERRUPT TO OCCUR I NTERRUPTS BACK OFF
GET POINTER TO HEAD OF BUFFER TEST END OF BUFFER LOOP UNT 1L SONETH JNG I N BUFFER GET SCAN CODE AND ASC I I CODE MOVE POINTER TO NEXT POSITION STORE VALUE IN VARIABLE RETURN
;------ READ THE KEY TO SEE IF ONE IS PRESENT -----------------------
K2S K2S
PRDC eLI MOV eMp MOV STI RET ENoP
NEAR
BX ,.SUFFER HEAD SX,.BUFFER-TAIL AX, [BX] -
I NTERRUPTS OFF GET HEAD PO INTER
IF EQUAL (z= 1 J THEN NOTH I NG THERE
I NTERRUPTS BACK ON RETURN
;------ ROUTINE TO TRANSLATE SCAN CODE PAIRS FOR EXTENDED CALLS
1'1;10 E XLAT: - - CNP
JNE
OR JZ
XOR 1'1;10 E RETt
- - RET
AL, OF'Oh KID E RET AH, AH-
1'1;10 E RET AL.AL-
IS IT ONE OF THE FILL-INa? NO, PASS IT ON AH = 0 I S SPEC I AL CASE PASS TH I S ON UNCHANGED OTHERW I SE SET AL = 0
GO 8ACI'I;
;------ ROUTINE TO TRANSLATE SCAN CODE PAIRS FOR STANDARD CALLS
Kia_S_XLATt eMp
JNE eMP
JE eMP
JE NOV
JNP
- Kia S 1: NOV JNP
AH,OEOh KID S2 AL ,CDh 1'1; 10 SI
AL,CAh 1'1;10 51
AH,35h K I'd USE AH.TCI-! 1'1; 10_USE
I S IT KEYPAD ENTER OR I 1 NO, CONTINUE KEYPAD ENTER CODE 1 YES, NASSAGE A BIT
CTRL KEYPAD ENTER CODE? YES, NASSAGE THE SAME NO, MUST BE KEYPAD I
GIVE TO CALLER CONVERT TO CONPAT 18LE OUTPUT
GIvE TO CALLER
K10_S2t eMp JA
AH,84h I'I;IO_DIS
lSI T ONE OF THE EXTENDED ONES 1 YES. THROW AWAY AND GET ANOTHER CHAR
eMp JNE OR JZ JMP
AL.OFOh KID S3 AH.AH K 10 USE KIO:DIS
IS IT ONE OF THE FILL-INa?
NO, TRY LAST TEST
a AH ·
IS SPECIAL CASE
PASS THI S ON UNCHANGED
THROW AWAY THE REST
- Kia S3:
eNP JNE OR JZ XOR JNP
AL,OEOh KID USE AH.AH KID USE A~.AL K I O_USE
IS IT AN EXTENSION OF A PREVIOUS NO, MUST BE A STANDARD CODE AH = 0 I S SPEC I AL CA5E .JUMPIFAH=O CONVERT TO COMPATIBLE OUTPUT PASS IT ON TO CALLER
ONE?
KID_USE: eLe RET
KID_DIS: STe RET
CLEAR CARRY TO INDICATE CiOOO CODE RETURN
I SET CARRY TO INDICATE DISCARD CODE ; RETURN
5-48 KEYBOARD (01/10/86)
IBM P ..... sonal COlllput ..... MACRO Aaa.'"bl..... V.,..lon 2.00 KEYBRQ --- 01/10/86 KEYBOARD ADAPTER BIOS
1-'
01-10-86
260
2.,
2.2
2.3
26.
2.S 0114 266 0114 '3 2.7 0115 .3 2··
2.' 270 271
0116 3B IE 0082 R 0111.1204 011C 8B IE 0080 R
272 273 274
0120 C3 0121
275
27. 277
27' 27' 2.0
0121
0121 SO 0122 S3
2" 2'2 283
0123 5 I 0124 52 0125 56
2 ·· 2.S 2 ·· 2.7 2··
0126 51 0127 IE 0128 06 0129 FC 0121. E8 0000 E
2.' 0120 E4 60 2.0 012F 93
2" 2.2
2'3 2 ··
2 ·· 0130 E4 61
2 ' . 0132 81. EO 2.7 0134 OC 80
2'. 0136 E6 61 299 0138 86 EO
300 0131. E6 61
301 Ol3C FB 302 0130 93 303
30' 30.
30. 013E B4 4F
307 0140 F9
30.
30' 310 311 312
0141 CD "
0143 12 03 0145 E9 02CA R
313 0148
31' 0148 81. EO 31.
31.
311
31. 0141. 3C FF
31' OI04C 75 03 320 014E E9 05040 R
321
322 0151 OE 323 0152 07
32' 0153 8A 3£ 0096 R 32S
32. 0157
327 0157 3C EO
32. 0159 15 01
32' 330
331
015B 80 DE 0096 R 12 0160 EB 09
332 0162
333 0162 3C El
33' 33S 33.
01604 15 08
" 0166 80 OE 0096 R
a I 6B E9 02CF R
337 33. o 16E 339 016E 24 7F
340 0110 F6 C7 02
341 0113 74 OC
3'2
3'3 0175 B9 0002 3" 0118 BF 0555 R 3'S Ol7B F21 AE
3'. 0110 75 54 3'7 011F EB 3D
3"
3" 018' 3SO 0181 F6 C1 0 I
3" 0184 14 I.
3'2 3.3 0186 B9 00004
3.' 3" 3··
0189 BF 0553 R 018C F21 AE 018E 704 DB
3'7 3 ·· 0190 3C 045
3'9 360 3.,
0192 75 2A 0194 F6 C4 80 0197 15 25
3.2 0199 E9 03FF R
PAGE
I - -- - -- - - - - - - - - - - - - - - - - - - ------- - -- - - - - ---- - - - - - - -- - - - - --- - - - - - - -- - - -
-- ,
;
-
-
-
-
----IN-C-R-E-M- -EN--T--BU--F-FE--R-
-- --- POINTER
--
----- ROUTINE
---
-
---
---------- -- ------- ----
K'
PRoe
NEAR
INC
8X
INC
8X
; MOVE TO NEXT WORD 1N LIST
CMP
BX, _BUFFER END
J8
K5
-
MDV
BX,"BUFFER_START
KK5. :
RET ENOP
AT END OF BUFFER? NO, CONTINl.E YES, RESET TO BUFFER BEGINNING
: - - - - - KEYBOARD I NTERRl.PT ROUT I NE
KB INT 1 PROC
-
- PUSH
PUSH PUSH
PUSH PUSH
PUSH
PUSH
PUSH
CLD
CALL
IN
XCHG
FAR AX 8X CX OX 51 01 OS ES
DDS AL,KB DATA BX, AX-
I SAVE THE STI UNTIL AFTER KEYBOARD RESET
FORWARD DIRECTION SET UP ADORE SSING TO OAT A SEGMENT READ I N THE CHARACTER I SAVE IT
;----- RESET THE SHIFT REGISTER ON THE PLANAR IF ENABLED, OR DO NOTHING IF ;----- IT IS DISABLED
IN MDV
DR OUT XCHG OUT
STI
XCHG
AL,KB CTL AH,ALAL,80H
~~-;~~L,AL
KB_CTL,AL
AX,BX
GET THE CONTROL PORl SAVE VALUE RESET BIT FOR KEYBOARD
GET BACK OR I G I NAL CONTROL KB HAS BEEN RESET
I RESTORE DATAl N
;----- SYSTEM HOOK INT 15H - FUNCTION 04FH ION HARDWARE INTERRUPT LEVEL 9H)
MDV STC INT
JC J"P
AH,04FH
ISH
KB INT PC K26
I SYSTEM INTERCEPT - KEY CODE FUNCTION I SET Ch I (IN CASE OF IRET) I CASSETTE CALL (AL). KEY SCAN CODE I RETURNS eh I FOR INVALID FUNCTION I CONTINUE IF CARRY FLAG SET ((ALI.CODE) ; EXIT IF SYSTEM HANDLED SCAN CODE
I EX I T HANDLES HARDWARE EO I AND ENABLE
AH,AL
1 SAVE SCAN CODE IN AH ALSO
;------ TEST FOR OVERRUN SCAN CODE FROM KEYBOARD
CMP
JNZ JMP
K16:
PUSH POP NOV
TEST EO I
-
CMP
JNE OR
JMP
AL,OFFH KI. K.2
CS ES 8H,_KS_FLAG_3
AL,Me EO
TEST El
_KB FLAG 3,LC EO+KSX SHORT ExTT_K -
I IS THI S AN OVERRUN CHAR 1 NO, TEST FOR SHIFT KEY 1 BUFFER_FULL_BEEP
ESTABLISH ADDRESS OF TABLES LOAD FLAGS FOR TEST I NG
IS THIS THE GENERAL MARKER CODE?
SET FLAG 81 T. SET KBX, AND THROW AWAY THIS CODE
TEST E1 t
-
CMP
JNE
OR
EXIT_K: .JMP
He AL,Me El
NOT
_KB-FLAG 3 , LC EI +KBX
K2&A
-
-
IS THIS THE PAUSE KEY?
SET FLAG, PAUSE KEY MARKER CODE THROW AWAY THIS COOE
NOT_HC:
ANa TEST JZ
AL,07FH BH,LC EO NOT_Li:_EO
TURN OFF THE BREAK BIT
WAS LAST CODE THE EO MARKER CODE?
.JUMP IF NOT
NOV
MOV REPNE JNE
JMP
CX,2 01 ,OFFSET K6+6 SCASB KI6A SHORT KI6B
I LENGTH OF SEARCH I IS THIS A SHIFT KEY? I CHECK IT I NO, CONT 1NUE KEY PROCESS I NG I YES, THROW AWAY, RESET FLAG
NOT LC EO:
- - TEST
JZ
BH,LC EI T_SYS::::KEY
I WAS LAST CODE THE E I MARKER CODE]
I .JUMP IF NOT
MOV MOV REPNE .J£
CMP JNE TEST JNZ J ...
CX,04 01 ,OFFSET K6+4 SCASB EXIT_K
AL,NUM KEY K168 AH,80H K 16B K39P
I LENGTH OF SEARCH IS THIS AN ALT, eTL, OR SHIFT? CHECK IT THROW AWAY I F SO
1SIT THE PAUSE KEY? NO, THROW AWAY & RESET FLAG YES, IS IT THE BREAK OF THE KEY? I YES, THROW THIS AWAY, TOO I NO, THI SIS THE REAL PAUSE STATE
KEYBOARD (01/10/86) 5-49
18... Per-sana I Computer- "'ACRO Ass.Mbler Version 2.00 KEY8RD --- 01/10/56 KEY80ARD ADAPTER 810S
1-5 01-10-86
3.3 3··
3.5 366 a I 9C
361 a I 9C 3C 54
368 0 I 9E 15 33 3··
370 OIAO F6 C4 80
371 0\A3 15 lC 372
373 0lA5 F6 06 0018 R 04
374 O'AA 15 12 315
316 OIAC 80 OE 0018 R 04
311 0181 80 20
318 0183 E6 20 319
380 381 352
0 I 85 a8 8500 0198 F8
a I B9 CD 15
383 OIBB E9 0204 R 364
385 OIBE E9 02CA R
36' 381 OICl 80 26 0018 R FB
388 389 390
01C6 BO 20
a I C8 E6 20
391 0 tCA B8 850 I 392 oleo F8
393 01CE CD 15
a 394 I 00 E9 0204 R
3'5
3" 3.7
398 0 I 03 8A IE 00 I 7 R
399 0101 BF 054F R
400 a I OA 89 0006 90 401 aIDE F21 AE
402 OlEO 8A C4
403 0lE2 14 03
404 0lE4 E9 02B6 R
.05
'4007'
408 0lE7 81 EF 0550 R
409 OIEB 2E: 8A A5 0557 R 410 01FO Bl 02
4110lF2A880 412 0lF4 14 03
413 0lF6 EB 6E 90
.14
415
41.
4110lF980FCI0
418 OIFC 13 21
41 ·
· 20 421
422 olFE 05 26 0017 R
423 0202 F6 C4 OC 424 0205 15 03
425 0201 E9 02CA R
426 020A F6 Cl 02
421 0200 14 01
426 020F 08 26 0096 R
429 0213 E9 02CA R
430 0216 02 EC
431 021808260018 R
432 021 C E9 02GA R 433
434
435
436 021 F
431 021F F6 C3 04
438 0222 74 03
439 0224 E9 0286 R
440 0227 3C 52
441 0229 15 21
442 0228 F6 C3 08
443 022E 74 03
444 0230 E9 0296 R 445 0233 F6 C7 02
446 0236 15 14
4,47 0238 F6 C3 20
448 0238 15 OA
449 0230 F6 C3 03
450 0240 14 OA
451 0242
","52 0242 8A EO
453 0244 EB 70 90
.54 455 456
0247 F6 C3 03 024A 14 F6
457
458 024C
459 024C 64 26 0018 R
460 0250 14 03
461 0252 E8 16 90
462 025508260018 R
463 0259 30 26 00 I 7 R
'1464 0250 3C 52
...465
466 467 4.6
025F 15 69 0261 8A EO 0263 E8 18 90
.70 471 472 473 414
415 476
0266 0266 80 FC 0269 F6 04 0268 73 43
0260 20 26 0017 R 0271 80 FC F8
PAGE ,------ TEST FOR SYSTE'" KEY
T SY5 KEY:
-
- C"'P
JNE
AL, SYS KEY KI6A
I S IT THE SYSTE'" KEY? CONT I NUE I F NOT
TEST JNZ
AH,080H K16C
CHECK IF TH I S A BREAK CODE OONT TOUCH SYSTE'" INDICATOR IF TRUE
TEST JNZ
SEE IF IN SYSTEM KEY HELD DOWN IF YES. DONT PROCESS SYSTE... INDICATOR
K 1681 KI6C:
DR MOV OUT
MOV 5TI INT JMP
JMP
ANa MOV OUT
MOV 5T1 INT JMP
ClKB FLAG I,SYS SHIFT
AL,EOI -
020H,AL
AX,0850aH
I.H .27
INDICATE SYSTE... KEY DEPRESSED END OF INTERRUPT CO"''''ANO SEND CO"'MAND TO INTERRUPT CONTROL PORT I NTERRUPT-RETURN-NO-EO t FUNCTION VALUE FOR ...AKE OF SYSTE'" KEY "'AKE SURE I NTERRUPTS ENABLED USER INTERRUPT END PROCESS I NG
'2'
I IGNORE SYSTE... KEY
OK8 FLAG I ,NOT AL,EOI 020H, AL
AX,0850lH
ISH K27
SYS SHIFT,
-
I
I
I
I
;
I
,
TURN OFF SHIFT KEY HELD DOWN END OF INTERRUPT CO......AND
SEND CO......AND TO INTERRUPT CONTROL PORT INTERRUPT-RETURN-NO-EOI FUNCTION VALUE FOR BREAK OF SYSTE'" KEY
...AKE SURE INTERRUPTS ENABLED USER INTERRUPT IGNORE SYSTE'" KEY
;------ TEST FOR SHIFT KEYS
K 16A:
MOV MOV MOV REPNE MOV JE JMP
BL.OKB FLAG 01 ,OFFSET K6 CX ,K6L SCASB
.A1L7,AH
'25
;------ SHIFT KEY FOUND
PUT STATE FLAGS IN 8L
SHIFT KEY TABLE LENGTH LOOK THROUGH THE TA8LE FOR A ...ATCH RECOVER SCAN CODE
,JU"'P I F MATCH FOUND I F NO "'ATCH, THEN SH I FT NOT FOUND
SUB
"OV MOV TEST JZ JMP
DI.OFFSET K6+ 1 AH,CSIK7(DIJ CL,2 AL,80H K! 7C K23
AD,JUST PTR TO SCAN COOE NTCH GET ...ASK INTO AH SET UP COUNT FOR FLAG SH I FTS TEST FOR KEY 8REAK
,JU"'P I F BREAK
:------ SHIFT "'AKE FOUND, DETER... ,NE SET OR TOGGLE
K 17C:
C ... P JAE
AH, SCROLL SH I FT
K18
;------ PLAIN SHIFT KEY, SET SHIFT ON
; I F SCROLL SH I FT OR A80VE, TOGGLE KEY
K170: KI1El
DR TEST JNZ JMP TEST
JZ OR
J"P SHR OR JMP
OKB FLAG,AH
AH,CTL SHIFT+ALT SHIFT
'2,K 110 -
BH,LC EO
KI7E -
OKB FLAG 3, AH
K26-
-
AH,CL
ClKB FLAG 1, AH
K26-
TURN ON SHIFT BIT IS IT ALT OR CTRL?
YES, "'ORE FLAGS TO SET NO, INTERRUPT RETURN IS TH I S ONE OF-THE NEW KEYS?
NO, .JU...P SET BITS FOR RIGHT CTRL, ALT 1NTERRUPT RETURN ...OVE FLAG-BITS TWO POSITIONS
SET BITS FOR LEFT CTRL, ALT INTERRUPT_RETURN
,------ TOGGLED SHIFT KEY, TEST FOR 1ST "'AKE OR NOT
K18: KI8A:
K188: K19: K20:
TEST JZ JMP eMP JNE TEST JZ JMP TEST JNZ TEST JNZ TEST JZ
MOV JMP
- 8L,CTL SHIFT
KI8A
,,I SH 1FT-TOGGLE CHECK CTL SHIFT STATE .JU"'P IF NOT CTL STATE
.2.
I ,JU"'P IF CTL STATE
AL.INS_KEY
; CHECK FOR INSERT KEY
'22
I JU",P IF NOT INSERT KEY
BL.ALT SHIFT
.K2I58B -
BH,LC_EO K22
,I CHECK FOR ALTERNATE SHIFT
¢I ,JU...P IF NOT ALTERNATE SHIFT ,Ju"'p IF ALTERNATE SH I FT
,I IS THIS THE NEW INSERT KEY? YES, THIS ONE'S NEVER A '0'
BL,NUM STATE
; CHECK FOR BASE STATE
- K21
I .JUMP IF NUM LOCK 15 ON
BL ,LEFT SH I FT +R I GHT_SH I FT ; TEST FOR SHIFT STATE
- , .22
JUMP IF BASE STATE
AH,AL '2.
I PUT SCAN CODE BACK INTO AH I NUMERAL ·0" , STNDRO. PROCESS ING
K21:
TEST JZ
, BL,LEFT_SH tFT .. R I GHT_SH I FT I ""GHT BE NU"'ERIC
.20
IS NUMERIC, STD. PROC.
K22: K22A:
TEST
JZ JMP OR XOR eMP JNE MOV JMP
AH,OKB FLAG I
K22A -
K2,
OKB FLAG I, AH
OKB-FLAG-;- AH
AL, INS KEy Kii!6 -
AH,AL .26
SHIFT TOGGLE KEY HITI PROCESS IT I S KEY ALREADY DEPRESSED
JU...P I F KEY ALREADY DEPRESSED INDICATE THAT THE KEY IS DEPRESSED TOGGLE THE SHIFT STATE TEST FOR 'ST ...AKE OF INSERT KEY JU"'P I F NOT I NSERT KEY SCAN CODE IN BOTH HALVES OF AX FLAGS UPDATED, PROC. FOR BUFFER
;-- --- BREAK SHIFT FOUND
K23:
eMP NOT JAE
AND eMP
AH, SCROLL SH I FT
'A2H .
oK9 FLAG. AH
AH,ROT CTL_SHIFT
BREAK-SH 1FT-FOUND IS THIS A TOGGLE KEY? INVERT ...ASK
YE S, HANDLE BREAK TOGGLE TURN OFF SHIFT BIT IS THIS ALT OR CTL?
5-50 KEYBOARD (01/10/86)
IBM Personill Computer MACRO Assembler Version 2.00 KEYBRD --- 01/10/86 KEYBOARD ADAPTER BIOS
1-.
OI-10-8b
411
476 479
480 481 482 483 484 485 486 487 488 489 490 491 492 4.3 494
495
44 ·.·,
4.6 -499
500
501 502 503 504
505 506 507 508 5.9 51. 511 512 5 I3 514 515 Sib 51 7 518 519
52. 521 522
523 524 525 52b 527 528 529 530 531 532 533 534 535
53b 537
538 53.
0214 11 26
0276 F6 C7 02 0279 14 Ob 0278 20 26 0096 R 027F EB 06 0281 02 Fe 028320260018 R 0287 8A EO 0289 AO 0096 R Q28C 02 E8 028E OA 06 0018 R 0292 02 EO 0294 24 OC 02960806 0017 R 029A 8A C4
029C 3C 88 029E 75 2A
02AO AO 0019 R 02A3 84 00 02A5 88260019 R 02A9 3C 00 02A8 74 10 02AD E9 0519 R
02BO 02BO 20 2b 0018 R 0284 EB 14
OlBb 0286 3C 80 02B8 73 10 02BA Fb Ob 0018 R 08 02BF 14 IC 02C I 3C 45 02C3 14 OS 02C5 80 26 0018 R F7
02eA 02CA 80 2b 009b R FC
02CF
02CF FA
0200 BO 20
0202 E6 20
0204
0204
0205 IF
020b 5F
0207 5E
0206 5A
0209 59
02DA 5B
0208 56
020C CF
JA
1<230
; NO. ALL DONE
K23A: K238:
TEST
JZ AND JMP
SAR AND MOV MOV SHR OR SHL AND OR MOV
BH,LC EO
K23A -
OKB FLAG 3, AH
SHORT 1<238
AH,CL
oKB FLAG I, AH
AH,AL -
AL,OKB FLAG 3
AL,CL -
-
AL,OKB FLAG I
AL,CL -
-
:~B A~~A~~ !~T+CTL_SHI FT
AL,AH
2ND ALT OR CTL? NO, HANDLE NORMALL Y RESET BI T FOR R (CHT AL T OR CTL CONT I NUE
MOVE THE MASK B (T TWO POS I T IONS RESET BIT FOR LEF;r AL T OR CTL SAVE SCAN CODE GET RIGHT ALT & CTRL FLAGS MOVE TO 81TS I & 0 PUT I N LEFT ALT & CTL FLAGS MOVE 8ACK TO 8 J is 3 & 2 F I L TER OUT OTHER GARBAGE PUT RESULT IN THE REAL FLAGS RECOVER SAVED SCAN CODE
K230:
CMP JNE
; IS THIS ALTERNATE SHIFT RELEASE I INTERRUPT_RETURN
;------ ALTERNATE SHIFT KEY RELEASED, GET THE VALUE INTO BUFFER
MOV MOV MOV CMP JE JMP
- AL,ttAL T INPUT
AH,O
OALT_INPUT,AH
AL,O
<2. <61
SCAN CODE OF 0 ZERO OUT THE F (ELD
WAS THE INPUT" 01 I NTERRUPT RETURN IT WASN'T7 SO PUT IN BUFFER
K24:
AND JMP
OK8 FLAG I, AH SHORT K26
BREAK-TOGGLE INDICATE NO LONGER DEPRESSED INTERRUPT_RETURN
;------ TEST FOR HOLD STATE
AL, AH · SCAN CODE
1<25:
NO-SHIF"T-FOUND
CMP
AL,80H
TEST FOR BREAK KEY
JAE
K2.
NOTH I NG FOR BREAK CHARS FROM HERE ON
TEST
~~:_FLAG_l ,HOLD_STATE
ARE WE IN HOLD STATE
JZ
BRANCH AROUND TEST I F NOT
CMP
AL,NUM KEY
JE AND
~~~JL~G_I'NOT HOLD STAT~ CAN'T ~N~;~LgF~NT~~MR~~g'\TATE BIT
1<2b:
AND
OKB_FLAG_3,NOT LC_EO+LC_EI
RESET LAST CHAR H.C. FLAG
K2bA:
CLI MOV OUT
AL,EOI Q20H. AL
( NTERRUPT-RETURN TURN OFF INTERRUPTS END OF INTERRUPT COMMAND SEND COMMAND TO I NTERRUPT CONTROL PORT
1<27:
POP
ES
POP POP POP
0os'
51
POP
OX
POP
CX
POP
BX
POP
AX
IRET
INTERRUPT-RETURN-NO-EO I RESTORE REG I STERS
RETURN, INTERRUPTS BACK ON WITH FLAG CHANGE
KEYBOARD (01/10/86) 5-51
IBM PerlSonal Computer MACRO Assembler Version 2.00 KEYBRo --- 01/10/66 KEY80ARo ADAPTER BIDS
,-1
01-10-86
5<0
541 5.2 543 0200
544 545 5··
0200 3C 58 020F 11 E9
541 02EI F"6 C3 08 548 02E4 14 OC
5" 550 02E6 Fb Cl 10
551 552 553 554 555 55. 551 55. 55. 5bO 561 562 5b3
02E9 14 OA
02EB Fb Ob 0016 R 04 02FO 14 03 02F2 E9 03CC R
02F5 02F5 F6 C3 04 02F8 14 31 02FA 3C 53
5b4 02FC 15 33 5b5
5 ·· 561
568 02FE Cl 06 0012 R 1234 569 0304151 26 009b R 0010
510 511
512 513
030A E9 0000 E OlOo
514 515 51b 511 518
OlOo 52 4F 50 51 4B 0312 4C 40 41 48 49
0311 10 11 1213 14 15 0310 16 11 18 19 IE IF
519 580 581
0323 20 21 22 23 24 25 0329 26 2C 20 2E 2F 30 032F 31 32
5.2
55..3'
585 0331 586 0331 3C 39 581 0333 15 05 588 0335 BO 20
589 0331 E9 0500 R 590 033A
591 033A 3C OF
592 033C 15 Ob 593 OJJE B8 A500
594 595 596 591 598 599
034 I E9 0500 R 0344 0344 3C 4A 034b 14 19 0348 3C 4E 034A 74 75
.00
bO' b02 b03 b04 b05 b06 bOT b08 b09
034C 034C 8F 0300 R 034F 89 OOOA 0352 F21 AE 0354 75 18 0356 F6 Cl 02 0359 15 bB
b 10 035B 8 I EF 030E R 611 035F AO 0019 R
612 OJ62 84 OA
613 0364 F6 E4
..,,..
614
615
bib bl1
0366 OJ Cl 03615 A2 0019 R 0368 E9 02CA R
620 b21 622 623
.2.624
.25
b21 62e 629 630 631 632 633 634 .35 .3· · 31 638 639 640 641 642 643 644
··s
646 641 648 649 b50 b51 b52 653
036E Ol6E C6 06 0019 R 00 0313 89 OOIA 0316 F2/ AE 0318 14 42
037A 037A 3C 02 031C 12 43 031E lC 00 0380 11 05 0382 80 C4 16 0385 EB 35
0381 0381 3C 51 0389 72 09 0388 3C 58 0380 17 05 038F 80 C4 34 0392 EB 28
0394 F6 Cl 02 0391 14 18 0399 3C IC 0398 15 06 0390 B8 A600 03AO E9 0500 R 03A3 3C 53 03A5 14 1F
PAGE
1------ NOT IN HOLD STATE
K26:
e"p JA
AL,88 .2b
AL, AH = SCAN COOE (ALL MAKES)
NO-HOLD-STATE TEST FOR OUT-OF-RANGE SCAN CODES
IGNORE IF OUT-OF-RANGE
TEST JZ
- 8L,ALT SHIFT
K28A
ARE WE IN ALTERNATE SHIFT?
,JUMP 1F NOT ALTERNATE
1(28A:
TEST JZ
TEST JZ JMP
BH,K8X .29
.2.ClKB_FLAG_1,5'1'5_ SHIFT
.3.
I IS THIS THE ENHANCED KEYBOARD?
NO, AL T STATE IS REAL
YES, IS SYSREQ KEY DOWN?
NO, ALT STATE IS REAL
YES, THIS IS PHONY ALT STATE
DUE TO PRESSING SYSREQ
;------ TEST FOR RESET KEY SEQUENCE {CTL ALT DELI
K29:
TEST JZ eMP JNE
8L,CTL SHIFT K31
AL.DEL KEY K31
I TEST-RESET
I ARE WE IN CONTROL SHIFT ALSO?
I NO RESET
; SHTFT STATE IS THERE, TEST KEY
; NO_RESET, IGNORE
;------ CTL-AL T-DEL HAS BEEN FOUND, DO 110 CLEANUP
MOV AND ,JMP
.RESET FLAG,' 234H
; SET FLAG FOR RESET FUNCT I ON
WORD PTR ClK8 FLAG 3,K8X ; CLEAR ALL FLAG BITS EXCEPT K8X
RESET
-
, ,JUMP TO POWER ON 0 I AGNOST I CS
; -----1(30
--
ALT-INPUT-TABLE LABEL 8YTE
DB
82,19,80,81,15
08
16,11,11,12,13
SUPER-SHIFT-TABLE
DB
16,11,18,19,20.21
08
22.23,24,25,30.31
08
32,33.34,35,36,31
08
38,44,45,46,41,48
08
49,50
10 NUMBERS ON KEYPAD ; A-Z TYPEWRITER CHARS
;------ IN ALTERNATE SHIFT, RESET NOT FOUND
K311 K3111 1(312:
eMP JNE MOV JMP
e"p JNE MOV JMP
COP JE eMP JE
..,AL,S7
K311
AL, '
AL,IS
Kll2
AX,OASOOh
.51
AL,14
K318
AL,18
K37B
; ------ LOOK FOR KEY PAC ENTRY
NO-RESET TEST FOR SPACE KEY NOT THERE
SET SPACE CHAR 8UFFER_F I LL
TEST FOR TAB KEY NOT THERE SET SPECIAL CODE BUFFER_FILL
FOR
ALT-TAB
TEST FOR KEYPAD GO PROCESS TEST FOR KEYPAD -+ GO PROCESS
K321 K32A:
MOV MOV REPNE JNE TEST JNZ SUB MOV NOV MUL AOO MOV JNP
01 ,OFFSET K30 CX,IO
.S3C3ASB
BH,LC_EO K37e ol,OFFSET K30-+1 AL, ClAL T INPUT AH,IO AH AX,DI
ClALT_'NPUT,AL .2b
;------ LOOK FOR SUPERSHIFT ENTRY
ALT-KEY-PAD ALT-I NPUT-TA8LE LOOK FOR ENTRY US I NG KEYPAD LOOK FOR MA TCH NO AL T KEYPAD IS-THIS ONE OF THE NEW KEYS?
YES, ,JUMP. NOT NUMPAD KEY
01 NOW HAS ENTRY VALUE
GET THE CURRENT BYTE
MULTIPLY BY 10
ADD IN THE LATEST ENTRY
STORE I T AWAY
THROW AWAY THAT KEYSTROKE
K33:
MOV MOV REPNE JE
ClALT _INPUT ,0
CX.26
SCAS8
Kl7A
NO-AL T-KEYPAD ZERO ANY PREVIOUS ENTRY INTO INPUT I OI,ES ALREADY POINTING I LOOK FOR MATCH IN ALPHABET I MATCH FOUND. GO FILL THE BUFFER
;------ LOOK FOR TOP ROW OF ALTERNATE SHIFT
K341
eMP JB
e"p JA ADD JMP
AL,2
.3.K318
AL,I3
AH,I18 SHORT K31A
; ALT-TOP-ROW ; KEY WITH' I' ON IT I NOT ONE OF INTERESTING KEYS ; IS IT IN THE REGION ; AL T -FUNCT I ON I CONVERT PSEUDO SCAN CODE TO RANGE I GO FILL THE BUFFER
;------ TRANSLATE ALTERNATE SHIFT PSEUDO SCAN CODES
K35: K3SAI 1(3SB:
eMP JB eMP JA ADD JMP
TEST JZ eMP JNE MOV JMP eMP JE
AL,FII_M K35A AL.FI2_M K35A AH,S2 SHORT K3lA
BH,LC EO K37
AL.28 K358 AX, OA600~ .51 AL,63 K31C
ALT-FUNCTION
IS IT FII?
NO, BRANCH
IS IT F12?
NO, BRANCH CONVERT TO PSEUDO SCAN CODE GO FILL THE BUFFER
DO WE HAVE ONE OF' THE NEW KEYS? NO, JUMP
TEST FOR KEYPAD ENTER NOT THERE SPEC I AL CODE BUFFER FILL TEST FOR DELETE KEY HANDLE WITH OTHER EDIT KEYS
5-52 KEYBOARD (01/10/86)
IBN Peraonal Computer NACRO A·· elllbler Vers,o" 2.00 KEYBRD --- 0' /1 0/86 KEY80ARD ADAPTER B I OS
1-'
01-10-86
654 655 656 651 656 659 660
·6·6·I
663 664 6.5 666
6·6··1
669 670 611 612 613 674 675 676 677 678 679 680
..681
·6·8·2
········7
6ee 689 690 691
.9_692
693
695 696 697 698 699 100 701 70. 70. 704 105 106 701 108 109 710
7711.1
11. 11_
115 116 717 71e 719 720 721 722 7Z3 724 7.5 72. 727 728 729 130 731 132 133 134 135 73. 737 73. 739 740 741 742 743 744 145 746 741 746 149 150 151 752
,,,1...5..3
757 758 159 160 761 762 763 164 165
7 ··
7'7
03A1 3C 35 03A9 75 CO 03A8 88 A400 03AE E9 0500 R
0381 3C 3B 0383 12 OC 0385 3C 44
03B7 11 82 0389 80 C4 2D
038C 80 00 0·38E E9 050D A
03C I 80 FO 03C3 E9 050D A
03C6 04 50 03C8 8A EO 03CA E8 Fa
03CC
03CC F6 C3 04 03CF 15 03 0301 E9 0454 A
03D4 3C 46 0306 75 1£ 03D8 F6 C1 10 0308 74 05 0300 F6 C1 02 03EO 74 14
03E2 88 IE 001A R 03E6 89 IE OOIC R 03EA C6 06 0011 R 80 03EF CD IB 03F 1 28 CO 03F3 E9 0500 A
03F6 03F6 F6 C1 10 03F9 15 25 03FB 3C 45 03FD 75 21 03FF 80 OE 0016 R 06 1)404 BO 20 0406 E6 20
0408 80 3£ 0049 R 01 0400 74 01 040F BA 0308 0412 AO 0065 R 0415 EE 0416 0416 F6 06 0018 A 08 0418 15 F9 0410 E9 0204 R
0420 0420 3C 31 0422 75 10 0424 F6 C7 10 0421 74 05 0429 F6 C7 02 042C 14 20 042E B8 7200 0431 E9 0500 R
0434 0434 3C OF 0436 74 16 0438 3C 35 043A 75 08 043C F6 C1 02 043F 74 06 0441 88 9500 0444 E9 0500 R
0447 B8 055F R 044A 3C 3B 044C 12 51 044E BB 055F R 0451 E9 04FC R
0454 3C 31 0456 75 1F 0458 F6 C1 10 045B 74 07 0450 F6 C7 02 0460 75 07 0462 EB 34 0464 F6 C3 03 0467 74 ZF
e"p
JNE NOV
J"P
K31 :
e"p
J8
co·
JA ADD
AL,53 K32A AX,OA400., K51
AL,59 K37B AL,68
K32A AH o45
; TEST FOR KEYPAD / ; NOT THERE, NO OTHER EO SPECIALS I SPEC I AL CODE I BUFFER FILL
TEST FOR IN TABLE AL T-CONTINUE IN KEYPAD REGION? OR NUMLOCK 0 SCAOlLOCK?
IF so, IGNOAE
CONVEAT TO PSEUDO SCAN CODE
K37A:
OOV JO ·
ALoO K51
I ASC I I CODE OF ZERO I PUT IT] N THE BUFFER
K37B:
OOV JO,
AltOFO., K57
I USE SPEC I AL ASC]] COOE I PUT I TIN THE BUFFER
K31C:
ADD NOV
J"P
AL,80 AH,AL K37A
CONVERT SCAN CODE (EDIT KEYS) {SCAN CODE NOT IN AH FOR INSERT) PUT I TIN THE BUFFER
NOT IN ALTERNATE SHIFT
K38:
TEST JNZ
JO'
BLoCTL_ SHIFT
K38A K._
NOT-ALT-SHIFT
BL STI LL HAS SH I FT FLAGS ARE WE I N CONTROL SH I FT?
I YES 0 START PROCESS ING I NOT-CTl-SHIFT
1------ CONTROL SHIFT, TEST SPECIAL CHARACTERS
;------ TEST FOR BREAK
K38Ar
co.
JNE TEST
JZ TEST JZ
AL 0 SCROLL_KEY K39 BH,KBX K38B
BH,LC_EO K,9
K38B:
NOV NOV NOV
INT SU8 JO'
BX ,.eUFFER HEAD .sUFFER T ATL, ex .B I os_eR"EAK , 80H
18H AX,AX K57
TEST FOR BREAK JUMP, NO-BREAK IS THIS THE ENHANCED KEYBOARD?
NO, BREAK IS VALID YES, WAS LAST CODE AN EO?
NO-BREAK, TEST FOR PAUSE
RESET BUFFER TO EMPTY
TURN ON BIOS BREAK B]T BREAK I NTERROPT VECTOR PUT OUT OUt.4t.4Y CHARACTER BUFFER_FILL
,-------- TEST FOR PAUSE
K39; K39P:
TEST
JNZ
co.
JNE OR NOV
OUT
BH,KBX K41
AL,NUM KEY K41 -
.KB FLAG' ,HOLD STATE
AL,EOI -
-
020H,AL
NO-BREAK
IS TH I S THE ENHANCED KEYBOARD? YES. THEN TH I SCAN' T BE PAUSE LOOK FOR PAUSE KEY NO-PAUSE TURN ON THE HOLD FLAG END OF I NTERRUPT TO CONTROL PORT ALLOW FURTHER KEYSTROKE INTS
---- DURING PAUSE INTERVAL, TURN CRT BACK ON
e"p
JE OOV OOV OUT
TEST JNZ JO.
lteRT MODE,7
K40 -
OX ,03D8H
AL ,.CAT t.40DE SET
DX,AL -
-
IIKB FLAG I ,HOLD STATE
K40-
-
K27
IS TH I S BLACK AND WH I TE CARD YES, NOTHING TO DO PORT FOR COLOR CARD GET THE VALUE OF THE CURRENT MODE SET THE CRT MODE, SO THAT CRT IS ON PAUSE-LOOP
LOOP UNT I L FLAG TURNED OFF INTERRUPT_RETURN_NO_EO I
= ------ TEST SPEC I AL CASE KEY 55
K41 : K4IA:
CM. JNE TEST
JZ TEST JZ MOV
JOP
AL,55 K4, BH,KBX K41 A
~~2~C_EO
AX,114·Z56 K51
NO-PAUSE TEST FOR ·/PRTSC KEY NOT-KEY-55
IS TH I S THE ENHANCED KEYBOAAD? NO, CTL-PRTSC IS VALID
YES, WAS LAST CODE AN EO? NO, TRANSLATE TO A FUNCTION
START/STOP PRINTINC SWITCH BUFFER_F I LL
;------ SET UP TO TRANSLATE CONTROL SHIFT
K42;
K42A: K42B:
co.
JE eM. JNE TEST JZ MOV
J"P
NOV
C"P J8 NOV
J"P
AL,I5 K42B AL,53 K42A BH,LC_EO K42A AX,9500., K51
BX,DFFSET K8 AL,59 K45F BX, OFFSET K8 K.4
NOT-KEY-5S IS IT THE TAB KEY?
YES, XL ATE TO FUNCTION CODE IS iT THE / KEY?
NO, NO MORE SPECIAL CASES YES, IS IT fROM THE KEYPAD?
NO, JUST TRANSLATE YES, SPEC I AL CODE FOR TH I S ONE BUFFER FILL
SET UP TO TRANSLATE CTl ] SIT I N CHARACTER TABLE?
YES, GO TRANSLATE CHAA SET UP TO TRANSLATE CTL
NO, CO TRANSLATE_SCAN
;------ NOT IN CONTROL SHIFT
K44; K44A:
CMP
JNE TEST JZ TEST JNZ
JNP
TEST
JZ
AL,55
PR I NT SCREEN KEY?
K45
NOT-PRINT-SCREEN
BH, KBX
I IS TH I S ENHANCED KEYBOARD?
K44A
I NO, TEST FOR SHIFT STATE
BH,LC EO
I YES, lAST CODE A t.4ARKER?
K44B -
I YES, IS PR I NT SCREEN
SHORT K45C
J NO, XLATE TO ~." CHARACTER
BL,LEFT SHIFT+RICHT SHIFT INOT 101 K80, SHIFT KEY DOWN?
K45C -
-
I NO, XLATE TO · _. CHARACTER
ISSUE INTERRUPT TO PEAFORM PAINT SCREEN FUNCTION
KEYBOARD (01/10/86) 5-53
IBM Person. I Computer MACRO Assembler VerSiort 2.00 KEYBRD --- 01/10/86 KEYBOARD ADAPTER BIOS
1-'
01-10-86
168 0469 BO 20
769 0468 E6 20
770 0460 CD 05
eo 111 0-46F
26 0096 R FC
772 0-474 E9 020-4 R
7771713..
176 0477
171 0417 3C 3A
178 0479 77 2C
71'
7130 ,0478 3C 35
781 0470 75 05
782 047F F6 C7 02
" .783 0482 75 1-4
185 0484 89 001A 786 0487 8F 0317 R
787 048A F2/ AE
788 048C 75 05
76.
790 0-48E F6 C3 -40
791 0-491 75 OA
192 0493 F6 C3 03
793 0496 15 OA
7" 795 0-498 88 0587 R
796 0-498 E8 50
797 0-490
798 0-490 F6 C3 03
799 04AO 75 F6
800 04A2 BB 060F R
80 I 04A5 EB 46
60.
603
60.
805 0-4A 7
806 0-4A1 3C 44
807 0-4A9 17 02
808 0-4A8 E8 36 609
6' 0
8" 81.
813 0-4AD
814 04AO 3C 53
815 04AF 77 2C
61.
8" 818 0-481 3C 4A
819 0483 14 EO
820 0485 3C 4E
821 0487 74 E9
822 04B9 F6 C7 02
8"823 048C 15 OA
825 0-48E F6 C3 20
826 04CI 75 13
827 04C3 F6 C3 03
828 0-4C6 75 13
829 830
831 04C8 3C -4C
832 04CA 15 05
833 04CC 80 FO
834 04CE EB 3D 90
835 0401 BB 0587 R
836 0404 EB 26
.37
838
839 0406 F6 C3 03
840 0409 75 EO
841 04DB EB C5
6··
886""'3
846 0400
847 0400 3C 56
848 040F 75 02
849 04El E8 80
...886"".0
6'3 854 855
04E3 F6 C3 03 04E6 74 EO
857
685.8'
6.0 6. ,
862 863 864
865 866 861
886.8'
670 8" 872 873 874 875 876
871 878 879 .80
86'
04E8 88 060F R 04E8 EB OF
04EO
0-4EO FE ce
04EF 2E: 07 04F I F6 06 0096 R 02 0-4F6 74 15 04F8 B4 EO 04FA EB 11
04FC 04FC FE C8 04FE 2E 1 07 0500 8A EO 0502 80 00 0504 F"6 06 0096 R 02 0509 14 02 0508 BO EO
K448:
MOV OUT INT ANa JM.
AL, EO I
, END OF CURRENT INTERRUPT
020H, AL
I SO FURTHER TH I NGS CAN HAPPEN
5H
; ISSUE PR I NT SCREEN INTERRUPT
~~~_FLAG_3.NOT LC_EO+LC_~ 1b~E:~C~U~li~~G~ ~~7G~CCURR ING
;------ HANDLE THE IN-CORE KEYS
K451
CM. J'
'4.AL.58
NOT-PR INT-SCREEN TEST FOR I N-CQRE AREA -JUMP IF NOT
CM. JNE TEST JNZ
AL,53 K45A
BH,LC EO K45C
IS THIS THE ~/w KEY? NO, JUMP
WAS LAST CODE THE MARKER? YES, TRANSLATE TO CHARACTER
K45A:
MOV MOV REPNE JNE
CX,26
01 ,OFFSET K30+10 SCASB 1'(-45B
LENGTH OF SEARCH
POINT TO TABLE OF A-Z IS TH I S A LETTER KEY?
NO, SYMBOL KEY
CHARS
K45B:
K-45CI K450:
K45EI K45F:
TEST JNZ TEST JNZ
MOV JM.
TEST JNZ MOV JM.
~;5gAPS_STATE
: ~~~TW~O~ NS~~~S_LOCK?
BL,LEFT SHIFT+RIGHT SHIFT I ARE WE IN SHIFT STATE?
K45E -
-
t YES. UPPERCASE
I NO, LOWERCASE
BX,OFFSET KIO
, TRANSLATE TO LOWERCASE LETTERS
SHORT K56
, ALMOST-CAPS-STATE
~~52EFT_SHI FT+R I GHT_SHIF; ~Hr~T~' T~~P S~~~TO~NCA~~O~TATE
8X, OFFSET K I 1 SHORT K56
I TRANSLATE TO UppERCASE LETTERS
;-----K-46 :
TEST
CMP JA JMP
FOR KEYS
AL,68 K47 SHORT
FI K53
FlO
NOT I N-CORE AREA TEST FOR FI - FlO JUMP IF NOT YES, GO DO FN KEY
PROCESS
;------ HANDLE THE NUMERIC PAD KEYS
K-41:
CMP JA
I NOT FI - FlO I TEST FOR NUMPAD KEYS
, .JUMP IF NOT
;-----K481
KEYPAD CMP JE CMP .JE TEST JNZ
KEYS, MUST
AL.74 K45E
AL. 78 K45E SH,LC EO K49 -
TEST
NUM
LOCK
FOR DETERMINATION
; SPECIAL CASE FOR MINUS ; GO TRANSLATE I SPEC I AL CASE FOR PLUS I GO TRANSLATE ; IS THIS ONE OF THE NEW KEYS? I YES, TRANSLATE TO 8ASE STATE
TEST JNZ TEST JNZ
1--- -- BASE CASE FOR KEYPAD
K491
CMP
AL,76
JNE
K49A
MOV
AL,OFOh
JMP
K57
K49AI MOV
BX,OFFSET Kl0
JMP
SHORT K64
SPECIAL CASE FOR BASE STATE 5 CONT I NUE I F NOT KEYPAD 5 SPEC I AL A SC I I CODE BUFFER FILL
8ASE CASE TABLE
CONVERT TO PSEUDO SCAN
1------
K501
K511
MIGHT TEST JNZ JMP
8E NUM LOCK, TEST SHIFT STATUS
BL,LEFT SHIFT+R1GHT SHIFT
,ALMOST-NUM-STATE
K49
-
-
I SHIFTED TEMP OUT OF NUM
SHORT K45E
; REALLY_NUM_STATE
STATE
; ------ TEST FOR THE NEW KEY ON WT KEY80ARDS
K52 ~
CM. JNE JM.
AL,86 .53 SHORT K458
NOT A NUMPAO KEY IS IT THE NEW WT -JUMP IF NOT HANDLE WITH REST
KEY? OF' LETTER
KEYS
1------ MUST BE FII OR F12
K53:
TEST JZ
I Fl - FlO COME HERE, TOO
BL,LEFT SHIFT+RIGHT SHIFT ITEST SHIFT STATE
K49
-
-
I JUMP, LOWERCASE PSEUDO SC' S
MOV JM.
8X.OFFSET K 11 SHORT K64
UPPER CASE PSEUDO SCAN CODES TRANSLATE_SCAN
;---- TRANSLATE THE CHARACTER
K56:
DEC XLAT TEST JZ MOV
JM.
AL CS:KII ~~~_FLAG_3.LC_EO
AH,MC EO SHORT-K51
TRANSLATE-CHAR CONVERT OR I GIN
CONVERT THE SCAN CODE TO ASC I I IS THIS A NEW I'(EY?
NO, GO FILL BUFFER I YES, PUT SpEC I AL MARKER IN AH I PUT I T I NTO THE BUFFER
1------ TRANSLATE SCAN FOR PSEUDO SCAN COOES
K64:
DEC XLAT MOV MOV
TEST JZ MOV
AL C5;K8 AH,AL AL,O ~~~J·LAG_3. LC_EO
AL.MC_EO
I TRANSLATE-SCAN-ORGO , CONVERT ORIGIN I CTL TABLE SCAN I PUT VALUE INTO AH I ZERO ASC I I CODE I IS THIS A NEW KEY? I NO, GO FILL 8UFFER I YES, PUT SPECIAL MARKER IN AL
;------ PUT CHARACTER INTO BUFFER
5-54 KEYBOARD (01/10/86)
IBh! Per~ona! Computer MACRO A~~emb!er
Ver~,on 2.00
KEYBRo - - - 0 I / 10/86 KEYBOARD ADAPTER B I OS
1-10 01-10-86
882 883 88-4 885 886 881 888 889 890 891 892 893 89-4 895 896 891 898 899 900 901 902 903 904 905 906 907 908 909 910 91 I 912 913 914 915 916 911 918
0500 0500 3C FF 050F 7-4 05 0511 80 FC FF 051-4 15 03
0516 0516 E9 02CA R
0519 0519 FA 051A 8B IE OOIC R 051E 8B F3 0520 E8 011-4 R 0523 3B IE 001A R 0521 1-4 11 0529 89 0-4 052B 89 IE 001C R 052F BO 20 0531 E6 20 0533 B8 9102 0536 CO 15 0538 80 26 0096 R FC 0530 E9 0204 R
0540 0540 BO 20 0542 E6 20 0544 B9 02A6 0541 B3 04 0549 E8 0000 E 054C E9 0204 R
054F
K51 :
e"p
JE
e"p
JNE
AL,-I K59 AH,-I
K61
BUFFER-F I LL
IS THIS AN IGNORE CHAR
YES, DO NOTHING WITH IT
LOOK FOR - I PSEUOO SCAN
NEAR_ INTERRUPT_RETURN
K59:
J"P
K26
NEAR-I NTERRUPT"-RETURN
INTERRUPT_RETURN
K61:
eLI
"OV "OV CALL
e"p
JE
"OV "OV "OV OUT
"OV INT ANO
J"P
TURN OFF INTERRUPTS
BX, .BUFFER TAl L
GET THE ENO PO I NTER TO THE BUFFER
SI,BX
-
SAVE THE VALUE
K4
ADVANCE THE TAIL
BX, .BUFFER HEAD
HAS THE BUFFER WRAPPEO AROUND
K62
-
BUFFER FULL BEEP
(SI] ,AX
STORE THE VALUE
.BUFFER TAIL,BX
I MOVE THE POINTER UP
AL. EO I -
I END OF I NTERRUPT COMMAND
020H, AL
I SEND COMMAND TO I NTERRUPT CONTROL PORT
AX,09102H
I MOVE IN POST CODE .. TYPE
15H
I PERFORM OTHER FUNCT I ON
~~~JLAG_3.NOT LC_EO+LC_~IINT~R~~~~~R~~G~NCHAR H.C. FLAG
-- BUFFER I S FULL SOUND THE BEEPER
K62:
"OV OUT
"OV "OV CALL
J"P
AL,EOI
INTAOO,AL ex ,618 BL,4
BEEP K21
I ENABLE JNTERRUPT CONTROLLER CH I P
I
I DIVISOR FOR 1160 HZ
I SHORT BEEP COUNT (1/16 + 1/64 DELAY)
I GO TO COMMON BEEP HANDLER
I EXIT
KEYBOARD (01/10/86) 5-55
IBM Pa,.lIonal Computa,. MACRO A55ambla,. Var" on 2,00 KEYBRO --- 01/10/86 KEYBOARD ADAPTER BIOS
1-1 I
oI -I 0-86
.19
'20 .21 .22
.23
9''2226'' 054F
921 054F 52
928 0550 3A 45 46 35 10
929 0555 2A 36
930 : 0008
931
932
933 0551
934 0557 60 935 0558 40 20 10 08 04
936 0550 02 0 I
'37 936
939 940 055F 941 055F 18 FF 00 FF FF FF
942 0565 IE FF FF FF FF IF
9043 056B FF 1F 94 t I 11 05
944 0511 12 14 19 15 09 OF
945 0511 10 18 10 OA FF 01
946 0510 13 04 06 01 08 OA
9041 948 949 950
0563 08 OC FF FF FF FF 0589 I C I A 18 03 16 02 058F OE 00 FF FF FF FF 0595 96 FF 20 FF
951
952 0599 5E 5F 60 61 62 63
953 059F 64 65 66 61 FF FF
954 05A5 11 80 84 8E 13 8F
955 05A8 14 90 15 9 t 16 92
956 0581 93 FF FF FF 89 8A
957
956
959 OS81
'160 05S1 IB 31 32 33 34 35 '161 058D 36 31 38 39 30 20 '162 05C3 30 08 09 11 11 65
963 05C9 12 14 19 15 69 6F
964 05CF 10 58 50 00 FF 61 965 0505 13 64 66 61 68 6A
966 0508 68 6C 38 21 60 FF
961 968 969 970
05Et 5C 1A 18 63 16 62 05E1 6E 60 2C 2E 2F 05EC FF 2A FF 20 FF
971
972 05FI 38 3C 30 3E 3F 973 05F6 40 41 42 43 44
974 05F8 FF FF
975 976
911 05Fo
918 05FO 41 48 49 FF 48 FF
919 0603 40 FF 4F 50 5 I 52
980 0609 53
981 060A FF FF 5C 85 86
962
963
96. 985 060F
986 060F 18 2 I 40 23 24 25
981 0615 5E 26 2A 28 29 5F
988 0618 28 08 00 51 51 45 989 0621 52 54 59 55 49 4F
990 0627 50 78 70 00 FF 41
991 0620 53 44 46 41 48 4A
992 0633 48 4C 3A 22 1E FF
993 0639 7C 5A 55 43 56 42
994 063F 4E 40 3C 3E 3F
995 0644 FF 2A FF 20 FF
99.
997
998 0649
999 0649 54 55 56 57 58
1000 064E 59 5A 5B 5C 50
100 I 0653 FF FF
1002
1003
1004 0655
1005 0655 31 38 39 20 34 35
1006
362831 32 33 30
1001
2E
1008 0662 FF FF 1C 81 88
1009 0661
1010
PAGE
; ---
-
-
-
--
-
-
-
-
---
-
---
-
-
------
--
--------------
-
-
-
-
-
-
-
-
-
---------
-
-
-----
:
KEY IDENTIFICATION SCAN TABLES
i-------------- TA8LE OF SHIFT KEYS AND h4ASK VALUES ---------------
;------ KEY_TABLE
K6
LABEL BYTE
g:DB
I NS KEY
; I NSERT KEY
~~~~_~~~ :~y~H~E~E~CROLL-KEY ,AL1JEY ,CTL_KEY
K6L
EQU
'-K6-
; ------ h4ASK TABLE
K 7
LABEL 8YTE
DB
INS SHIFT
; INSERT MODE SHIFT
DB
CAPS SH1FT,NUM SHIFT,SCROLL SHIFT,AL.T SHIFT,CTL. SHIFT
DB
LEFT:::'SHIFT,R1GHT_SHIFT
-
-
,---------------------- TABL.ES FOR CTRL. CASE ----------------------
<6
L.ABEL BYTE
J-------- CHARACTERS --------
08
27,-',00.-1,-1,-1
Ese, 1,2,3,4,5
DB
30,-1,-1,-1,-1,31
6,7,8,9,0,
08
-',127,148,17,23,5
BIo."p, Tab, Q, W. E
08
18,20,25,21,09,15
08
16,27,29,10,-1,01
IR,T,Y,U,J,O
I P, (,1, Enter, Ctrl, A
08
19,04,06,07,08,10
I S, 0, F, G, H, .J
08
11,12, -1, -I ,-I.-I
08
28,26,24,03,22,02
I K, L, I. " " LS ... ,f't
; i, Z, X, C, V, B
08
! 4,13.-1,-1 ,-1,-1
08
150. -I,' '.-1
: N, 104 . . . " I, RS""ft ; -, Alt., Space, CL.
;--------- FUNCTIONS --------
DB
94,95.96,97,98.99
I FI - F6
DB
100,101,102,103,-1,-1; F7 - FlO, NL., SL
08
119,141,132,142,115,143; Homa, Up, PgUp, -, Laf't, Pad5
DB
116,144,117,145,118,146; Right, +, End, Down, PgOn, Ins
08
141,-1,-1,-1,137.'38
I Oat, Sy5Req. Undef, WT, FII. FI2
;---------------------- TABLES FOR L.OWER CASE ---------------------
<I 0
L.ABEL. BYTE
08
21,'12345'
08
'61890- ,
08
':' ,08,09, 'qwe'
08 08
:~ (r~ :~~H, - , , ' A'
08
08
:~~~~~A:_,
08
'\, xcvb'
08
'nm,. J'
08
- I,'·', -I,'
LETTERS, Return, Ctr!
I LETTERS, L S"'I ft
R Sh,ft,"', Alt., Space, CL.
i ------ LC TABLE SCAN
DB
59,60,61,62,63
DB
64.65,66,67,68
DB
-1,-1
8ASE STATE OF FI - FlO NL. SL.
; ------ KEYPAD TABLE
K15
LABEL. BYTE
DB
11,12,73,-1,15,-1
08
71,-1,79,80,81,82
DB
83
DB
-',-1,'\',133,134
BASE STATE OF KEYPAD KEYS SysRq, Undaf, WT, F11. FI2
------------------- TABLES FOR UPPER CASE
<II
LABEL BYTE
08
27,'j@#,X'
08
'1\&- (I '
08
'+',08~00, 'QWE'
08
'RTYUIO'
08
'PII',ODH,-t,'A'
08
· SDFGHJ'
08
'KL; "I",J', - I
08
'jZXCVB'
D8
'NM<>? ·
08
I L.ETTERS, Return. Ctr I
LETTERS, L Sh I ft.
R Shoft,"', Alt, Space, CL
; -----K 12
UC TABLE SCAN
L.ABEL BYTE
DB
84,85,86,87.88
DB
89,90,91,9Z,93
DB
-1,-1
SHIFTED STATE OF FI - FlO NL, SL
;------ NUM STATE TABLE
K 1 4
LABEL BYTE
DB
'189-456+1230,'
NUML.OCK STATE OF KEYPAD KEYS
CODE END
08 ENOS
-I, -1. 'j'. 135,136
I SysRq, Undef'. WT, Fll, FI2
5-56 KEYBOARD (01/10/86)
IBM p.,.sonal Compute,. t.!ACRO Assembl.,. Ve,.sion 2.00 PRT ------ 01110/66 PRINTER ADAPTER BIOS
1-1 0'-'0-86
1
.·Z
3
5
0000
7 6 9 10 11 1Z 13
,,..15
17 16
19 ZO ZI ZZ Z3
Z' ZZ5.
Z7 Z6 Z9
30 31
3Z 33
34
335.
37 36
.,.309
..'Z
'·3·
· 5
· 7
.'96
50 0000
51
52 0000 FB
53 0001 52
54 0002 53
55 0003 63 FA 03
56 0006 11 25
57
56 0006 6A F6
.,59
60
OOOA IE OOOB E8 0000 E
62 OOOE 56 63 OOOF 8B F2 64 0011 8A 9C 0076 R 65 001501 E6 66 001 7 8B 94 0006 R 61 OOlB 5E 66 OOIC IF .9 10 0010 OB 02 11 00 IF 14 OC 7Z 13 0021 OA E4 14 0023 14 00
75 16 0025 FE CC 11 0021 14 4B
76 79 0029 FE CC 80 002B 14 39 61
82 0020
6.63 0020 84 29
85 002F 66 002F 5B 61 0030 5A 68 0031 CF 60 90 91
9Z 93 0032 94 0032 EE 95 0033 42
PACiE "6,'21
TITLE PRT ------ 01/10/66 .LIST
PRINTER ADAPTER BIOS
CODE
SECiMENT BYTE PUBL I C
PUBLIC PRINTER_IO_'
EXTRN DDS I NEAR
INT 17 H ----------------------------------------------------------------
PRINTER 10
I
TH I S ROUT I NE PROV I DES COMt.!UN I CAT I ON WITH THE PR INTER
INPUT
'AHI = OOH
PRINT THE CHARACTER IN (ALI
ON RETURN, (AH) = , I F CHARACTER NOT PR I NTED (TIt.!E OUT)
OTHER BITS SET AS ON NORMAL STATUS CALL
(AH),. OIH INITIALIZE THE PRINTER PORT
RETURNS WITH (AH) SET WITH PRINTER STATUS
IAH) = 02H READ THE PRINTER STATUS INTO IAHl
1
6
5
4
3
2-1
0
I
I
I
I
I
I
I
I
I
I
I
I I · TfME OUT
I UNUSED
I
I
I
I
I
I
I I
I
I I
I I
I
I
I_
1/0 ERROR
1I - , s SELECTED
I
I
1- ' = OUT OF PAPER
I
1- ' = ACKNOWLEOCiE
I I " NOT BUSY
(DXI = PRINTER TO BE USED (0,1,21 CORRESPONOINCi TO ACTUAL VALUES
IN .PRINTER BASE AREA DATA AREA .PRINTER BASE CONTAINS THE BASE ADDRESS OF THE PRINTER CAROlS) AVAILABLE ILOCATED-AT BECiINNINCi OF DATA SECiMENT, 408H ABSOLUTE, 3 WORDS)
DATA AREA .PRINT TIM OUT (BYTEl MAY BE CHANCiE TO CAUSE DIFFERENT Tlt.!E OUT WAITS. DEFAULT=20
RECiI STERS
IAHI IS MODIFIED WITH STATUS INFORMATION ALL OTHER S UNCHANCiED
ASSUt.!E CS ICODE ,OS IDATA
- PR INTER 10_ 1
ST1 PUSH PUSH CMP .)A
PROC
FAR
DX BX
DX,03H B10
MOV PUSH CALL
BH,AL DS DDS
PUSH MOV MOV SHL
"OV POP POP ASSUt.!E OR .)Z
51 Sl,oX BL,OPR INT_TlM_OUT[S I] SI,I DX,.PR INTER_BASE[SI] 51 DS OS:NOTHINCi
OX,OX B10
OR
AH,AH
.)Z
B30
DEC .)Z
AH B60
DEC .)Z
AH BOO
BIO:
MOV
AH,029H
B20:
POP
BX
POP
DX
IRET
ENTRY PO I NT FOR ORCi OEF02H
I NTERRUPTS BACK ON
SAVE WORt<. RECiISTERS
CHECK FOR PR I NTER NUMBER VAL I 0 0 - 3
ERROR EX I T I F OUT OF RANCiE
SAVE CHARACTER TO BE PRINTED
SAVE ·SECit.!ENT
AOoRESS DATA SECiMENT
SAVE WORK POINTER RECiISTER
CiET PR INTER PARAt.!ETER
LOAD TIMEOUT VALUE
WORD OFFSET INTO TABLE INTO lSI)
CiET BASE ADDRESS FOR PR I NTER CARD
RECOVER CALLERS (S I I RECi I STER
AND IDS) SECiMENT RECiISTER
TEST OX ,. ZERO, INDICATINCi NO PRINTER
EXIT, NO PRINTER ADAPTER AT OFFSET
TEST FOR (AH) = OOH
PR I NT CHARACTER IN (AL)
TEST FOR IAHI .. OlH , INITIALIZE PRINTER
,TEST FOR I AH). 02H
CiET PRINTER STATUS
I RETURN ERROR BITS FOR INVALID CALLS
RETURN RECOVER RECi I STERS RETURN TO CALLINCi PROCiRAM IAH). STATUS
;----- PRINT THE CHARACTER IN (ALI
B30:
OUT INC
DX,AL DX
OUTPUT CHARACTER TO DATA PORT
POINT TO STATUS PORT
PRINTER (01/10/86) 5-57
19M Personal Comput.er MACRO Assembler VerSion 2.00 PRT ------ 01/10/8& PRINTER ADAPTER BIOS
1-2 01-10-8&
9b 97 98 99
100 101 102
103 10. 10. 10& 101 108 109 110 11 I 112 113 114
115 11& 117 118 119 120
121 122 123 124 125
12& '21 128 129 130 t3 t
132 133 134 135
13& 137 138 139 140 141 142
,1.4.3
I ·· I ·· 147 148 149 150 151 152 153 154 155
156 157 158
1,.509
161
162 163
164 165 166 167 168 169 170 111 112 113 174
115 17. 111 178 179 180
0034 EC 0035 EC 003& A8 80 0038 15 05
003A 98 90FE 0030 CO 15
003F 003F 51 004029 C9 0042 0042 EC 0043 8A EO 0045 A8 80 0047 15 OF
0049 E2 F1
0049 FE C9 0040 15 F3
004F 59 0050 80 CC 01
0053 80 E4 F9 005& E8 15
0058 0058 59 0059 BO 00 0059 42 005C FA 0050 EE 005E E8 GO
0060 90 OC 0062 EE 00&3 FB 0064 4A 0065 4A
0066 0066 42 0067 EC 00&8 EC 0069 24 Fe 006B 8A EO 0060 0060 8A C 7 006F 80 F4 48 0012 EB B9
0014 0074 42 0075 42 0076 BO 08 0078 EE 0019 98 03E8 001C 007C 48 0010 15 FO
001F 90 OC 0081 EE 0082 4A 0083 4A 0084 EB EO
0086
0086
----- PAGE
;
CHECK FOR PR INTER BUSY
IN IN TEST
.JNZ
AL,OX AL,OX AL,80H
940
[NT 15 H -- DEVICE BUSY
MOV INT
AX, 90FEH 15H
WAIT BUSY
B40: 945:
PUSH SUB
IN MOV TEST JNZ
CX CX,CX
AL,OX AH,AL AL,80H 950
LOOP
B45
DEC .JNZ
BL B45
POP OR AND .JMP
CX AH,I AH,OF9H SHORT 910
B501
POP
MOV INC CLI OUT .JMP
CX AL,OOH OX
OX,AL 1+2
NOV OUT 5T1 OEC DEC
AL,OCH OX,AL
OX OX
B60: 810 :
PRINTER STATUS
INC IN IN AND MOV
MOV XOR .JMP
OX AL,OX AL,OX AL oOF8H AHoAL
AL o8H AH,48H 820
INITIALIZE THE PRINTER PORT
980 : B90:
INC INC MOV OUT MOV
DEC .JNZ
OX OX AL,8 OX,AL AX,IOOO
AX 890
.OV
OUT OEC OEC J.P
AL ,OCH OX,AL OX OX ··0
PRINTER_IO_I
ENOP
CODE END
ENDS
; PRE-CHARGE +BUSY LINE IF FLOATING GET STATUS PORT VALUE I S THE PR INTER CURRENTLY 9U SY SKIP SYSTEM DEVICE BUSY CALL IF NOT
FUNCTION 90 PRINTER 10 SYSTEM CALL
SAVE CALLERS (CX) REGISTER 1NNER LOOP {&4K I
GET STATUS STATUS TO IAHI ALSO IS THE PRINTER CURRENTLY BUSY GO TO OUTPUT STROBE
LOOP 1F NOT
DECREMENT OUTER LOOP COUNT MAKE ANOTHER PASS I F NOT ZERO
RESTORE (CX) WITH CALLERS VALUE
SET ERROR FLAG TURN OFF THE UNUSEO BITS RETURN WITH ERROR FLAG SET
SEND STROBE PULSE RESTORE (CX) WITH CALLERS VALUE SET THE STROBE LOW (BIT ON) OUTPUT STROBE TO CONTROL PORT PREVENT INTERRUPT PULSE STRETCHING OUTPUT STROBE BI T ,. I ua < 5us
a I / OELA Y TO ALLOW FOR LINE LOAD I NG
ANO FOR CORRECT PULSE WIDTH SET THE -STROBE HIGH
I NTERRUPTS BACK ON AD.JUST BACK TO BASE ADDRESS
FOR STATUS ROUTINE EXIT
PO 1NT TO CONTROL PORT PRE-CHARGE +BUSY LINE IF FLOATING GET PRIN7ER STATUS HARDWARE BITS TURN OFF UNUSED BITS SAVE
RECOVER CHARACTER I NTO I AL I REG I STER FLIP A COUPLE OF BITS IN STATUS RETURN FROM ROUTINE WITH STATUS IN AH
POINT TO OUTPUT PORT
SET INIT LINE LOW
I AD.JUST FOR INITIALIZATiON DELAY LOOP
DECREMENT DELAY COUNTER LOOP FOR RESET TO TAKE
NO INTERRUPTS. NON AUTO LF 0 SET DEFAULT INITIAL OUTPUTS AD.JUST BACK TO BASE ADDRESS
FOR STATUS ROUTINE EXIT EXIT THROUGH STATUS ROUTINE
I NIT HIGH
5-58 PRINTER (01/10/86)
IBM Pe.-sonal COlllpvte.- MACRO Assltlllbl · .- Ve'-5ion 2.00 RS232 ---- 01/10/56 COMMUNICATIONS BIOS (RS232)
I-I 01-10-8&
. 0000
9 10 11 12 13
1" 5 I. 17 18 19 20 21 22 23 24 25 2. 21 2. 29 30 31 32
333.
35 3. 31
3'
.309
41 .2
'43.
·· ·5 ··4··1
50 51 52 53 5. 55
,.5.
5 )
.,59
.0
......2
.·3·
· 5
,
··
10 11 12
,.13
14
7.
77 18 79 80 81 82 83 84 85 8& 81 88 89 90 91 92 93 94 95 9& 97 98 99 '00 101 102 103 , 04 , 05 106 101 108 109 110 1 II 112 113 '14
0000 0000 FB
0001 IE 0002 52 0003 56 0004 51 0005 51
0006 53 0007 83 FA 03 OOOA 71 24 OOOC 88 F2 OOOE 58 FA 0010 Dl E6 0012 E8 0000' E 0015 88 94 0000 R
00' 9 08 02 0018 14 13 00 I 0 OA E4
OOIF 14 18 0021 FE CC 0023 14 48 0025 FE CC
0021 14 10 0029 0029 FE CC
0028 75 03 0020 E9 008B R 0030
0030 84 80 0032 0032 58
0033 59 0034 SF 0035 5E 0036 SA 0037 IF
0038 CF
PAGE 118,121
TITLE RS232 ---- 01/10/86 COMMUNICATIONS BIOS .L[ST
CODE
SEGMENT BYTE PUBLIC
lRS232)
PUBLIC EXTRN EXTRN
RS232 10 1 AI: NEAR DDS: NEAR
·
1NT 14 H ---------------- - --------------------------- ----------------- ____ _
;RS232 10
- THIS ROUTINE PROVIDES BYTE STREAM 1/0 TO THE COMMUNICATIONS
PORT ACCORD I NG TO THE PARAMETERS I
= (AHI OOH INITIALIZE THE COMMUNICATIONS PORT
(AU HAS PARAMETERS FOR INITIALIZATION
1
·
----- BAUD
000 - 110 001 - 150 DID - 300 011 - &00 100 - 1200 101 - 2400 110 - 4800
1 1 1 - 9600
ON RETURN,
5 RATE --
CONDITIONS
4
,
-PARITY--
XO - NONE 01 - ODD I I - EVEN
SET AS IN CALL
2 STOPBIT
° -I - 2I
TO COMMO
1
0
I
--WORD LENGTH--I
10 - 1 BITS I I - 8 BITS
STATUS lAH.03H)
= (AH) 01 H
[AH) = 02H (AHI = 03H
SEND THE CHARACTER I N I AL) OVER THE COMMO LINE (AL) REGISTER IS PRESERVED
ON EXIT, BIT 1 OF AH IS SET IF THE ROUTINE WAS UNABLE TO TO TRANSMIT THE BYTE OF DATA OVER THE LINE.
IF BIT 1 OF AH IS NOT SET, THE REMAINDER OF [AHI I S SET AS IN A STATUS REQUEST,
REFLECTING THE CURRENT STATUS OF THE LINE. RECE I VE A CHARACTER IN (AL) FROM COMMQ LINE BEFORE
RETURNING TO CALLER ON EXIT, (AHI HAS THE CURRENT LINE STATUS, AS SET BY THE
THE STATUS ROUTINE, EXCEPT THAT THE ONLY BITS LEFT ON AFiE THE ERROR B[TS (1,4,3,2,1) IF [AH) HAS BIT 1 ON (TIME OUTI THE REMAINING
BITS AFiE NOT PREDICTABLE. THUS, (AH) IS NON ZERO ONLY WHEN AN ERROR OCCURRED · RETURN THE COMMO PORT STATUS IN lAX) (AHI CONTAINS THE LINE CONTROL STATUS
= BIT 1 TIME OUT
BIT to .:. TRANSMIT SHIFT REGISTER EMPTY
= BIT 5 TRANSMIT HOLDING REGISTER EMPTY = 81 T 4 BREAK DETECT
81T 3 = FRAMING ERROR
BIT 2 · PARITY ERROR BIT I · OVERRUN ERROR
BIT 0 = DATA READY
(ALI CONTAINS THE MODEM STATUS BIT 7 · RECEIVE LINE SIGNAL DETECT
BIT & · RING INDICATOR
BIT 5 = DATA SET READY
BI T 4 " CLEAR TO SEND
81T 3 = DELTA RECEIVE LINE SIGNAL DETECT
BI T 2 " TRA I LI NG EDGE RING DETECTOR BIT 1 z DELTA DATA SET READY
81T 0 '" DELTA CLEAR TO SEND
= PARAMETER INDICATING WHICH RS232 CARD [0,1 ALLOWED)
DATA AREA ORS232 BASE CONTA I NS THE BASE ADDRESS OF THE 8250 ON THE CARD
LOCATION 400H CONTAINS UP TO 4 RS232 ADDRESSES FlOSSIBLE
,
DATA AREA LABEL IIRS232 TIM OUT [BYTE) CONTAINS OUTER LOOP COUNT
,
VALUE FOR TIMEOUT (DEFAULTi I I
,OUTPUT
I
AX MODIFIED ACCORDING TO PARAMETERS OF CALL
;
ALL OTHERS UNCHANGED
ASSUME CS:CODE,DSIDATA
- RS232 10 I STI PUSH PUSH
PUSH PUSH PUSH
PUSH
C"P JA MOV
"OV SHL CALL
"OV OR JZ OR JZ DEC JZ DEC
PROC
FAR
OS OX S I 01 CX
ex
oX,03H
"E S 1,0)( OI,OX 51,1 DDS DX,ORS232_BASE[SI) DX,OX A3E
AH.AH A. AH A5 AH AI2
I NTERRUPT5 BACK ON SAVE SEGMENT
CHECK FOR ADAFTER NUMBER VAL I 0 ERROR EXIT IF OUT OF RANGE RS232 VALUE TO 151) AND TO (01) (~OR TIMEOUTS)
WORD OFFSET
0- 3
GET BASE ADDRESS TEST FOR 0 8ASE ADDRESS RETURN TEST FOR (AHI" OOH COMMO INITIALIZATION
TEST FOR (AHI" OIH SENO (ALI
TEST FOR (AHI = 02H
RECEIVE INTO [ALI
A3E:
A3:
DEC JNZ J"P
"OV
PDP POP PDP PDP POP PDP IRET
AH "E AI.
AH,080H
BX CX 01 S I
ox
OS
TEST FOR (AH)" 03H ERROR I F BAD COMMAND
COMMUNICATION STATUS I SET ERROR RETURN CODE
I RETURN FROM
RS232
I RETURN TO CALLER, NO ACT I ON
RS232 (01/10/86) 5-59
IBM P .... ~o.,ill COlllpute ... MACRO A~selllbla,.
Varsio., 2.00
RS232 ---- 01/10186 COMMUNICATIONS BIOS (RS2321
, -2 01-10-86
".
'"
' "118 0039
1 19 0039 8A EO
120 0038 83 C2 03
121 003E 80 80
122 0040 EE
'"'24 '"126 0041 8A 04
127 004381 04
128 0045 02 C2
129 0047 81 E2 0 DOE
130 0048 8F 0000 E
131 004E 03 FA
132 0050 88 94 0000 R
133 0054 42
134 0055 2EI 8A 45 01
135 0059 EE
136 005A 4A
137 0058 90
138 005C 2E = 8A 05
139 005F EE
140 0060 83 C2 03
141 0063 8A C4
142 0065 24 IF
143 0067 EE
144 0068 4A
145 0069 4A
146 006A 90
147 006880 00
148 0060 EE
149 006E E8 48
,", 50
"2
153 0070
154 0070 50
155 0071 83 C2 04
156 0074 80 03
157 0076 EE
158 0077 42
159 0078 42
160 0079 87 30
161 0078 E8 OOCA R
162 007E 74 08
163 0080
164 0080 59
..165
166 167
,168
0081 8A Cl 0083 0083 80 CC 80 0086 E8 AA
170 0088 171 00884A 172 0089
173 0089 87 20 174 0088 E8 OOCA R 175 008E 75 FO 176 0090
177 0090 83 EA 05 178 0093 59 179 0094 8A Cl
,...,180 0096 EE
,.2181 0097 EB 99 ,
185 186 187 188 189 190 191 192
193 194 195 196
197 198
199 200 201 202 203 204 205 206 207 20. 20. 210
211 212 213 214 215 216
217
0099 0099 83 C2 04 009C 80 01 009E EE 009F 42 OOAO 42 OOA 1 00A1 87 20 00A3 E8 OOCA R 00A6 75 08 00A6 00A8 4A 00A9 00A9 87 01 00A8 E8 OOCA R OOAE 75 03 OOBO 0080 80 E4 IE
0083 88 94 0000 R 0087 EC 0088 E9 0032 R
008B 0088 88 94 0000 R 008F 83 C2 05 00C2 EC 00C3 8A EO DOCS 42 00C6 EC 00C7 E9 0032 R
...PAGE
INITIALIZE THE COMMUNICATIONS PORT
MOV ADO MOV OUT
AH,AL OX,3 AL ,80H OX,AL
SAVE INITIALIZATION PARAMETERS IN (AHI PO I NT TO 8250 CONTROL REG I STER
I SET OLAB= I
DETERMINE BAUD RATE DIVISOR
MOV MOV
ROL AND MOV ADO MOV INC MOV
OUT DEC NOP MOV
OUT ADO MOV AND
OUT DEC DEC NDP MOV
OUT JMP
DL,AH CL,4 DL,CL OX ,OEH OJ ,OFFSET AI OI,OX
OoxX, flRS232 BASE [S I)
AL,CS:[Olj+l OX,AL Ox
AL,CS:[Dlj OX,AL OX,3 AL,AH AL,OIFH OX,AL
ox ox
AL,O OX,AL SHORT A 18
I GET PARAMETERS TO (DLJ
I SOLATE THEM BASE OF TABLE PUT INTO INDEX REGISTER POINT TO HIGH ORDER OF DIVISOR
I GET HIGH ORDER OF DIVISOR I SET ms OF D JV I SOR TO 0
I I/O DELAY I GET LOW ORDER OF 011/ I SOR , SET LOW OF DII/ISOR
GET PARAMETERS BACK STR I P OFF THE BAUD 81 TS LINE CONTROL TO S 81TS
I/O OELAY
I NTERRUPT ENABLES ALL OFF COM_STATUS
A'.
AT.
A8 :
SEND CHARACTER 1N (AL lOVER COMMa LINE
PUSH ADD MOV OUT INC INC MOV CALL JE
POP MOV
OR JMP
AX
DX,4
AL,3
OX,AL
.ox
ox
BH,30H
WAIT- FOR
STATUS
cx
..AL,CL
AH,SOH
SAVE CHAR TO SEND MODEM CONTROL REG I STER OTR AND RTS DATA TERMINAL READY. REQUEST TO SEND MODEM STATUS REGI STER
DATA SET READY & CLEAR TO SEND ARE 80TH TRUE YES. READY TO TRANSM I T CHAR
RELOAD DATA BYTE
INDICATE TIME OUT
RETURN
A9: A I 0: All:
,-----
DEC
MDV CALL JNZ
SUB POP MOV OUT JMP
ox
BH,20H
WAIT FOR STATUS
A7 -
ox,s
CX AL,CL OX,AL A3
I CLEAR TO SEND
I LINE STArus REG I STER
I WAIT SEND I IS TRANSM I TTER READY I TEST FOR TRANSMITTER READY ; RETURN WITH TIME OUT SET
; OUT CHAR ; DATA PORT
I RECOI/ER IN CX TEMPORAR I L Y I MOllE CHAR TO AL FOR OUT. STATUS IN AH ; OUTPUT CHARACTER ; RETURN
RECEIIiE CHARACTER FROM COMMa LINE
A12:
AI3, AI51 A17:
ADO MOV OUT INC INC
MOV CALL JNZ
DEC
MOV CALL JNZ
AND
OX,4 AL,I DX,AL
ox ox
BH,20H
A. WAIT FOR STATUS
ox
BH, I
WA I T FOR STATUS
A8 -
AH,OOOll110B
; MODEM CONTROL REG I STER
I OA T A TERM I NAL READY
MODEM STATUS REGISTER
WAIT DSR DATA-SET READY TEST FOR DSR RETURN WITH ERROR WAIT DSR END LINE-STATus REGISTER WAIT RECV RECETvE BUFFER FULL TEST FOR RECE I VE BUFFER FULL SET T I ME OUT ERROR GET CHAR TEST FOR ERROR COND I T IONS ON RECE I liE
MOV IN JMP
QX,flRS232 BASE[SIj
AL,OX
-
A3
DATA PORT GET CHARACTER FROM LINE RETURN
COMMO PORT STATUS ROUTiNE
A 18:
MOV ADO IN MOV INC IN
DX,flRS232_BASE[S I j OX,5 AL,DX
AH,AL
ox
AL,OX A3
CONTROL PORT GET LINE CONTROL STATUS PUT IN (AH) FOR RETURN
POINT TO MODEM STATUS REGI STER
GET MODEM CONTROL ST ATUS RETURN
5-60 RS232 (01/10/86)
~
IBM Personel Computer MACRO Assembler VerSion 2.00 RS232 ---- 01/10/86 COMMUNICATIONS 810S IRS232)
1-3
o 1-10-8f>
21' 219
220
221
222
223
224
225
22.
221
22. OOCA
229
230 OOCA 81. 90 001C R
231 OOCE
232 233 23' 235
OOCE 28 C9 0000 0000 EC 0001 81. EO
23. 0003 22 C7
231 0005 31. C7
23. 0007 74 08 239
2.0 0009 E2 F5
2"
2'2 0008 FE C8
2.3 0000 15 EF
2"
2.5 OODF 01. FF
24. OOEI 241 00E1 C3
24.
249 00E2
250
251 00E2 252
253 00E2 254
PAGE
WAIT FOR STATUS ROUTINE
iENTRY: IBH)" STATUS BIT IS) TO LOOK FOR I
~ ;EX I T
lOX)" ADDRESS OF STATUS REG ZERO FLAG ON " STATUS FOUND
ZERO FLAG OFF " TIMEOUT.
IAH)" LAST STATUS READ
WFSO: WFSI:
MOV
SUB
IN MOV ANa CMP
"E
LOOP
8L,IIRS232_TIM_OUT[OIJ
CX,CX
AL.OX AH.AL AL,BH AL.BH WFS_END
WFSI
OEC
"NZ
OR
WFS END:
-
RET
BL WFSO
8H,8H
WAIT_FOR_STATUS ENDP
RS232_10_'
ENOP
CODE
ENOS
ENO
I LOAD OUTER LOOP COUNT
GET STATUS MOVE TO IAH) ISOLATE BITS TO TEST EXACTLY" TO MASK RETURN WITH ZERO FLAG ON I TRY AGA IN
I DECREMENT LOOP COUNTER
I SET ZERO FLAG OFF
RS232 (01/10/86) 5-61
IBM Peraona' COftlputer M.... CRO .... aaelllbler Version 2.00 VIDEO ---- Ol/lOIBb VIDEO DISPL.... Y BIOS
I-I 01-10-B6
I
2
· 3
0000
5
b
· 7
9
10
II
12
13
1" 5 Ib 11 I. 19 20
21 22 23 24 25
2b 27 2. 29 .0 31 32 33 3. 35
3b
··37
,9
'0 41
'2
·'3·
· 5
.b .7 .B
.,.9
'0
.·2·
5' 55 5b 57 5B 59
bO bl
b2
b' b' b5 bb b7 b. b9
70 71 72 73 74 75 7b 77 7. 79 BO
.B2I
··.Bb··.
B7 BB B9 90
91 92 9. 9. 95 9b
97
·'B·
100
101
102 10.
10' 10. lOb 107 lOB 109 110 III liZ
""''
F ....GE liB, 121
TITLE VIDEO ---- 01/10/86 VIDEO DISPL.... Y BIOS
.LI5T
CODE
SEGMENT BYTE PUBL I C
PUBLIC PUBL I C PUBLIC PUBLIC
PUBLIC
PUBLIC PUBL I C
PUBLIC PUBL I C
PUBLIC PUBLIC PUBL 1C PUBLIC PUBLIC PUBLIC PUBLIC PUBLIC
ACT DISP P ....GE
RE....5 .. c CURRENT
RE .... D-CURSOR RE .... D-DOT
RE .... D-LFEN
SCROLL DOWN SCROLL-UP
SET COLOR SET-CPOS
SET-CTYPE SET-MODE
WR I TE .... C CURRENT WRITE-C CURRENT WRITE-DCh WRITE-TTY VIDEO-IO I VIDEO::::STATE
PUBl I C PUBLIC PUBL IC
PUBL I C PUBL I C PUBL I C PUBL I C PUBl I C
PUBL I C PUBL I C PUBL I C
PUBLIC PUBLIC PUBL I C PUBLIC PUBLIC PUBl I C PUBL I C PUBLIC
PUBLIC
SET MODE SET-CTYPE SET-CPOS
RE ....5 CURSOR
RE ....O-LPEN
ACT 151 SP P ....GE
SCROLL UP SCROLL-DOWN
RE .... D ....C CURRENT
WR I TE ....C CURRENT WR I TE-C CURRENT
SET COLOR WRITE DOT RE ....o DOT WRITE TTY V I D E O - S T .... T E
V IDEO-RETURN VIDEO-RETURN VIDEO-RETURN
WRITE:STRING
EXTRN EXTRN EXTRN EXTRN
EXTRN EXTRN
BEEP:NE .... R CRT CHAR GENINE ....R ooSTNEAR-
M51WORD M6.BYTE M7;BYTE
SPE .... KER BEEP ROUTINE
CH....R....CTER GENER ....TOR GR .... PHICS HBLE LOAD (OS) WITH D.... H SEGMENT SELECTOR REGEN BUFFER LENGTH HBLE COLUMNS PER MODE T .... BLE MODE SET VALUE PER MODE TABLE
INT 10 H ----------- -------------------- _________________________________ _
VIDEO 10 -THESE ROUTINES PROVIDE THE CRT DISPLAY INTERFACE THE FOLLOWING FUNCTIONS ARE PROVIDED:
(AH): OOH
IAH): OIH [AH): 02H IAHI: 03H IAH): 04H (AH): OSH (AH)" ObH (AH)" 07H
SET MODE (ALI CONTAINS MODE VALUE
( .... Ll : OOH 40X25 BW MODE (POWER ON DEFAULT I
(AU = 01 H 40X25 COLOR
[ALl : 02H 80X25 BW
[AL) : 03H 80X25 COLOR
GRAPH I CS MODES (AL I : 04H 320X200 COLOR
(ALI: 05H 320X200 BW MODE
(ALI : ObH 640X200 BW MODE
(ALI: 07H BOX25 MONOCHROME [USED INTERNAL TO VIDEO ONLY) .. .... NOTES -BW MODES OPERATE SAME AS COLOR MODES. BUT COLOR
BURST I S NOT ENABLED
-CURSOR IS NOT DISPLAYED IN GRAPHICS MODE SET CURSOR TYPE
(CHI
BITS 4-0 : START LINE FOR CURSOR
... HARDWARE WILL ALWAYS CAUSE BLINK
.... SETTING BIT 5 OR b WILL CAUSE ERRATIC BLINKING
OR NO CURSOR AT .... LL
ICLI '" BITS 4-0 '" END LINE FOR CURSOR SET CURSOR POS I T I ON
(DH,DLl .. ROW,COLUMN [OOH.OOHI [S UPPER LEFT
(BH I := PAGE NUMBER (MUST BE OOH FOR GRAPH I CS MODES I READ CURSOR POSITION
IBH) '" PAGE NUMBER (MUST BE OOH FOR GRAPHICS MODES)
ON EXIT IOH,DlI := ROW.COLUMN OF CURRENT CURSOR
I CH, CL I : CURSOR MODE CURRENTLY SET READ liGHT PEN POSITION
ON EXIT:
(AH) .. OOH -- LIGHT PEN SWITCH NOT DOWNINOT TRIGGERED
IAH) : OIH -- VALID LIGHT PEN VALUE IN REGISTERS
IDH,DLJ " ROW,COLUMN OF CHARACTER LP POSITION
ICHI '" RASTER LINE [0-1991
(BX) " PIXEL COLUMN [0-319,6391
SELECT ACTIVE DISPLAY PAGE !VALID ONLY FOR ALPHA MODES)
(ALI: NEW PAGE VALUE (0-7 FOR MODES 0&1, 0-3 FOR MODES 2&31 SCROLL ACTIVE PAGE UP
(ALI" NUMBER OF LINES, I LINES BLANKED AT BOTTOM OF WINDOW) t
IAL) : OOH MEANS BLANK ENTIRE WINDOW
= ICH,CLI : ROW.COLUMN OF UPPER LEFT CORNER OF SCROLL
(DH,DLI ROI,COLUr,lN OF LOWER RIGHT CORNER OF SCROLL
ISHI : ATTRIBUTE TO BE USED ON BLANK LINE SCROLL ACTIVE PAGE DOWN
(ALI", NUMBER OF LINES. INPUT LINES BLANKED AT TOP OF' WINDOW
{ALI", OOH MEANS BLANK ENTIRE WINDOW
(CH,CLI " ROW,COLUMN OF UPPER LEFT CORNER OF SCROLL (DH,DL) " ROW,COLUMN OF lOWER RIGHT CORNER OF SCROLL (BH) : ATTRIBUTE TO BE USED ON BLANK LINE
CHARACTER HANDL I NG ROUT I NES
(AH): OBH (AHI: 09H
READ ATTRIBUTE/CHARACTER AT CURRENT CURSOR POSITION
IBH) · DISPLAY PAGE (VALID FOR ALPHA MODES ONLYI
= ON EXITI
I .... L) CHAR READ
( .... H) '" ATTRIBUTE OF CHARACTER READ ( ....LPHA MODES ONLY) WRITE ATTRIBUTE/CH ....RACTER AT CURRENT CURSOR pOSITION
IBHI = DISpLAY PAGE (VALID FOR ALPHA MODES ONLY)
5-62 VIDEO (01/10/86)
IBt.4 Pe,.sonal Compute,. t.4ACRO Assembler Version 2.00 VIDEO ---- 0J/10/6E> VIDEO DISPLAY BIOS
II.
116
117
118
119 120
121 122
12'
124 125 126 127 128 129 130
1' 3"2
13' 134 135 136 137 138 139 140
'"142
14'
11444'
146
141
148 149 ISO
' "1S2 ,I.S4'
IS'
' "1S7
1S8
1S9
lOa
..1'"62
,,1' "6 '
1' "6.
169 170
1' "72
173
' "175 ' "177
178
179
180
181 182
183 184
18. 186 187 188 189 190 191 192
1'99''
..19'
'96
197
,198
200 201 202 203 204 20. 206 207
206 209
210 211 212 213 214 215 216 217 216 219
220 221 222 223 224 225 226
221 22.
0000 005F R 00(l2 014E> R 0004 0161 R 0006 016F R 0008 0765 R OOOA OIAE> R OOOC 020F R OOOE 02AO R 0010 02FF R 0012 035C R 0014 036E R 0016 0lC6 R 00160450 R OOIA 043F R OOIC 06FE R 001E 01EE R 0020 0130 R 0022 0130 R 0024 0130 R 0026 0388 R
'" 0026
= I CX) '" COUNT OF CHARACTERS TO WR I TE
IALI
CHAR TO WRITE
I
IBL) '" ATTRIBUTE OF CHARACTER IALPHA) /COLOR OF CHAR IGRAPHICS)
SEE NOTE ON WRITE DOT FOR BIT 7 OF BL · I.
= IAHI" OAH WRITE CHARACTER ONLY AT CURRENT CURSOR POSITION
IBH)
DISPLAY PAGE (VALlO FOR ALPHA MODES ONLY)
ICX) " COUNT OF CHARACTERS TO WRITE
IALI '" CHAR TO WRITE
NOTE: USE FUNCTION (AHI", 09H IN GRAPHICS MODES
FOR READ/WRITE CHARACTER INTERFACE WHILE IN GRAPHICS MODE. THE
CHARACTERS ARE FORMED FROM A CHARACTER GENERATOR IMAGE
MAINTAINED IN THE SYSTEM ROM. ONLY THE 1ST 128 CHARS
ARE CONTAINED THERE. TO REAO/WRITE THE SECOND 128 CHARS.
THE USER MUST INITIALIZE THE POINTER AT INTERRUPT IFH
ILOCATION 0001CH) TO POINT TO THE IK BYTE TABLE CONTAINING
THE CODE POINTS FOR THE SECONO 126 CHARS (128-2551.
FOR WRITE CHARACTER INTERFACE IN GRAPHICS MODE, THE REPLICATION FACTOR
CONTAINED IN ICX) ON ENTRY WILL PRODUCE VALID RESULTS ONLY
FOR CHARACTERS CONTAINED ON THE SAME ROW. CONTINUATION TO
SUCCEED I NG LINES W[LL NOT PRODUCE CORRECTLY.
GRAPH I CS I NTERF ACE
I AH): OSH
(AHI: OCH IAH)" OOH
SET COLOR PALETTE
IBH) = PALETTE COLOR 10 BEING SET to-121) JBL) = COLOR VALUE TO BE USED WITH THAT COLOR 10
NOTE: FOR THE CURRENT COLOR CARD. TH I S ENTRY PO I NT HAS
t.4EANING ONLY FOR 320X200 GRAPHICS.
COLOR 10 = 0 SELECTS THE BACKGROUND COLOR {O-15) COLOR I D = I SELECTS THE PALETTE TO BE USED,
a " GREEN! I) /RED{2) /YELLOWt31
I II CYANlll/t.4AGENTA(Z) /WHITE{3)
IN 40XZ5 OR 80X25 ALPHA MODES. THE VALUE SET FOR
PALETTE COLOR a INDICATES THE BORDER COLOR
TO BE USED {VALUES 0-31. WHERE 16-31 SELECT
WRITE ~OT
THE HIGH I NTENS I TY BACKGROUND SET.
lOX J " ROW NUMBER
I CX I " COLUMN NUMBER
(AL) = COLOR VALUE
IF BIT 1 OF AL " I, THEN THE COLOR VALUE IS EXCLUSIVE
ORed WITH THE CURRENT CONTENTS OF THE DOT
READ DOT
lOX) " ROW NUMBER
(CX) " COLUMN NUMBER
{AL I RETURNS THE DOT READ
ASC I I TELETYPE ROUT I NE FOR OUTPUT
lAH): OEH
WRITE TELETYPE TO ACTIVE PAGE
tAL) = CHAR TO WRITE (BL I = FOREGROUND COLOR I N GRAPH I CS MODE
NOTE -- SCREEN WIDTH IS CONTROLLED BY PREVIOUS MODE SET
IAHI: OFH CURRENT VIDEO STATE
RETURNS THE CURRENT VIDEO STATE
IAL) = t.400E CURRENTLY SET { SEE {AHI" OOH FOR EXPLANATION) {AH I = NUMBER OF CHARACTER COLUMNS ON SCREEN IBH) = CURRENT ACTIVE DISPLAY PAGE
(AH)" 10H RESERVED
IAHI= llH RESERVED
I AH I : 12H RESERVED
IAHI" 13H WRITE STRING
ES;BP - POINTER TO STRING TO BE WRITTEN
CX
- LENGTH OF CHARACTER STRING TO WRITTEN
OX
- CURSOR POSITION FOR STRING TO BE WRITTEN
BH
- PAGE NUMBER
(AL): OOH WR I TE CHARACTER STR I NG
BL
- ATTRIBUTE
STR I NG I S <CHAR, CHAR, ··· · CHAR>
CUR SOR NOT MOVED
(AL): OlH WRITE CHARACTER STRING AND t.40VE CURSOR
BL
- ATTRIBUTE
STRING IS <CHAR,CHAR, ··· ,CHAR>
CURSOR I S MOVED
(AL): 02H WRITE CHARACTER AND ATTRIBUTE STRING
(VALID FOR ALPHA MODES ONLY)
STRING IS <CHAR,ATTR,CHAR.ATTR ·· ,CHAR,ATTR>
CUR SOR I S NOT MOVED
I AL 1" 03H WR I TE CHARACTER AND ATTRIBUTE STR ING AND MOVE CURSOR
I VAL I 0 FOR ALPHA MOOES ONL Y)
STRING IS <CHAR,ATTR,CHAR,ATTR ·· ,CHAR,ATTR>
CURSOR I S MOVED
NOTEI CARRIAGE RETURN, LINE FEED. BACKSPACE, AND BELL ARE
TREATED AS COMMANOS RATHER THAN PRINTABLE CHARACTERS. I
BX.CX,DX,SI,DI,BP,SP,DS,ES,SS PRESERVED DURING CALLS EXCEPT FOR BX,CX,OX RETURN VALUES ON FUNCTIONS 03H,04H,ODH AND ODH. ON ALL CALLS AX IS MODIFIED.
.'L
ASSUt.4E CSICODE.DSIDATA.ESINOTHING
DW
DW DW DW DW DW DW DW DW DW
ow ow ow ow ow ow ow ow ow
DW
EOU
OFFSET OFFSET
OFFSET OFFSET OFFSET OFFSET
OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET
OFFSET OFFSET OFFSET 1-t.41
SET MODE
,
SET-CTYPE
SET-CPOS
REA" CURSOR READ-LPEN
ACT 1:51 SP PAGE
SCROLL uP"
SCROLL-DOWN
READ A'E CURRENT
WR I TE AE CURRENT
WR I TE-C EURRENT
SET COLOR WRITE ~OT
READ DOT
WRITE TTY
VIDEO-STATE
V IDEO-RETURN
V IDEO-RETURN
V IDEO-RETURN
WR I TE:=STR I NG
TABLE OF
RESERVED RESERVED RESERVED CASE 13H.
ROUTINES WITHIN VIDEO WRITE STRING
1/0
VIDEO (01/10/86) 5-63
IBM Personlll Computer MACRO Assembler VerSiOn Z.OO VIDEO ---- 01/10/86 VIDEO DISPLAY 8105
1-3 01- (0-86
229 0026 230 0028 F8
23 ( 0029 FC 232 002A 80 FC 233 0020 73 2F 234 235 002F 06 23b 0030 (E 237 0031 52 236 0032 5 I 239 0033 53
240 0034 56 24 I 0035 57 242 0036 55 243 0037 8E ---- R
244 003A 8E DE 245 003C 68 FO
246 003E AD 0010 R 247 0041 24 30 246 0043 3C 30
249 0045 8F 8600 250 0048 75 03 251 004A SF 8000 252 0040
253 0040 6E C7 254 004F 6A C4
255 0051 96 256 0052 01 EO 257 0054 96
2.8 259 0055 6A 26 .0049 R 2.0 261 0059 2E: FF A4 0000 R 2.2 263 005E 264 DOSE CF 265 005F 2·· 2.? 2.8 2.9 210 211 272 273 274 215 21. 277 276 279 005F 280 005F 8A 0304 281 006288 3E 0010 R
282 0066 81 E7 0030 283 006A 83 FF 30
284 0060 75 06 285 006F 80 07 286 0071 82 84
287 0073 E8 00 258 0075
259 0075 3C 07 290 0017 72 09 291 0079 80 00 292 007B 83 FF 20 293 007E 74 02
294 0080 80 02 295 0082
296 0082 A2 0049 R 297 0085 89 16 0063 R 298 0089 C6 06 0084 R 18 299 008E IE 300 008F 50 30 I 0090 98
302 0091 88 FO
303 0093 2E: 8A 84 0000 E 304 0098 A2 0065 R 305 009B 24 37
306 0090 52 307 009E 83 C2 04 306 OOAI EE 309 00A2 SA
310 311 00A3 2B DB 312 00A5 5E DB 313 00A7 C5 IE 0074 R
31< 3(5 OOAB 58 316 OOAC 890010 3 (7 OOAF 3C 02
318 OOBI 72 OE 319 0083 03 09
32.0 0085 3C 04 321 0081 72 08
322 00B9 03 09 323 00B8 3C 07 324 OOBD 72 02
325 OOBF 03 09 32.
327
328
329 OOC 1
330 OOC I 50
331 00C2 8B 47
332 00C5 86 EO
333 00C7 1E
33' 335 00C6 Ee 0000 E
336 OOCB A3 0060 R
337
338 OOCE IF
339 OOCF 32 E4
340
341
342
VIDEO 10 1 - STI
CLD
C"P JN8
PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH "DV ODV ODV
"DV AND C"P ODV JNE ODV M2:
MOV MOV C8W SAL XCHG
MOV
PROC
NEAR
AH.M1L/2
"4
ENTRY PO [NT FOR ORG OF065H INTERRUPTS BACK ON
SET 0 I RECT I ON FORWARD TEST FOR WITHIN TABLE RANGE BRANCH TO EXIT IF NOT A VALID COMMAND
ES
OS
I SAVE WORK AND PARAMETER REG I STERS
OX
CX
8X
51
01
8P
51.DATA
PO I NT OS: TO DATA SEGMENT
DS,51
SI.AX
SAVE COMMAND/DATA INTO lSi) REGISTER
AL. BYTE PTR .EQU I P FLAG
AL , 30H
-
AL , 30H
GET THE EQUIPMENT FLAG VIDEO BITS 1SOLATE CRT SW J TCHES IS SETT ING FOR MONOCHROME CARD?
Dl,OB8aaH
GET SEGMENT FOR COLOR CARD
"2 Ol,aBooaH
SKIP IF NOT MONOCHROME CARD ELSE GET SEGMENT FOR MONOCHROME CARD
ES,DI AL.AH
AX.I SI.AX
AH ··CRT_MODE
SET UP TO POINT AT VIDEO MEMORY AREAS PLACE COMMAND IN LOW BYTE OF (AX) ANO FORM BYTE OFFSET WITH COMMAND TIMES 2 FOR WORD TABLE LOOKUP MOVE OFFSET INTO LOOK UP REGISTER (SI)
AND RESTORE COMMAND/DATA INTO lAX) MOVE CURRENT MODE INTO (AH) REGISTER
..IMP
WORD PTR CS: [S I +OFFSET M I J
, GO TO SELECTED FUNCT I ON
;
COMMAND NOT VAL I D
I DO NOTHING IF NOT IN VALID RANGE
; -- - - - - - - ---- - --E-N-D--P-- ----- - -------------- -------------
; SET MODE
;
- THIS ROUTINE INITIALIZES THE ATTACHMENT TO
THE SELECTED MODE. THE SCREEN I S BLANKED. ; INPUT
;
~EQUIP FLAG BITS 5-4 :II MODEIWIDTH
;
1 1-:: t.40NOCHROME j FORCES MODE 7)
,
01 .:: COLOR ADAPTER 401(25 (MODE 0 DEFAULT)
;
10 · COLOR ADAPTER 601(25 lMODE 2 DEFAULT)
;
I AL) = COLOR MODE REQUESTED (RANGE 0 - 6 I
OUTPUT
NONE
;~~ - ~~~~ - - - - - - - - ;~~~ - - - - ~E~~ - - - - - - - - - - -- - - - - - - - - - - - - - - - -
Mec! 1016:
MOV MOV AND Ct.4P JNE MOV MOV JMP
OX. 03D4H DI,.EQUIP FLAG DI,30H D I. 30H M8C AL,7 DL,aB4H SHORT 1048
C"P
"8 MOV
cop
JE OOV
AL.7 O. ALtO DI,20H 06 AL.2
OOV
~OV
OOV
PUSH PUSH
ceo
OOV
OOV
~OV
AND
PUSH ADO OU7 POP ASSUME
SU8
"OV LOS ASSUME POP OOV
COP JC ADD
e"p
JC
ADO
C"P JC ADO
.CRT MODE I AL OADDR_6845,DX .ROWS.25-1 OS AX
SI,AX AL,es: (51 + OFFSET "7] ~CRT _MODE_SET. AL AL,037H OX OX,4 DX,AL OX OS IA8S0 BX,BX DS.BX BX.OPARt.4_PTR DS:CODE AX CX.16 AL ,2
"9 BX.CX AL,4 09 BX,CX AL,7
"9
BX.CX
ADDRESS OF COLOR CARD GET EQUIPMENT FLAGS SETTING ISOLATE CRT SWITCHES IS BW CARD I NSTALLED AS PR I MARY SK I P AND CHECK I F COLOR ELSE INDICATE INTERNAL BW CARD MODE SET ADDRESS OF BW (MONOCHROME) CARD CONT I NUE WITH FORCED MODE 7
CHECK FOR VAL I 0 COLOR t.40DES 0-6 CaNT I NUE IF 8ELOW MODE 1 FORCE DEFAULT 401(25 BW MODE CHECK FOR OEQUIP FLAG AT 60x25 BW CONTiNUE WITH t.405E 0 IF NOT ELSE FORCE MODE 2
SAVE MODE IN GLOBAL VARIABLE SAVE ADDRESS OF BASE INITIALIZE DEFAULT ROW COUNT OF 25 SAVE POINTER TO DATA SEGMENT SAVE MODE NUMBER 1AL) CLEAR HIGH BYTE OF' MODE SET TABLE POINTER, INDEXED 8Y MODE GET THE MODE SET VALUE FROM TABLE SAVE THE MODE SET VALUE VIDEo OFF. SAVE HIGH RESOLUTION BIT SAVE OUTPUT PORT VALUE POINT TO CONTROL REGl STER RESET VIDEO TO OFF TO SUPPRESS ROLLING BACK TO BASE REG I STER
SET UP FOR ABSO SEGMENT ESTABLISH VECTOR TABLE ADDRESSING GET POINTER TO VIDEO PARMS
RECOVER NODE NUMBER I N I AL) LENGTH OF EACH ROW OF TABLE DE TERM I NE WH I CH ONE TO USE MODE [S 0 OR I NEXT ROW OF INITIALIZATION TABLE
MOOEIS20R3 MOVE TO GRAPHICS ROW OF INIT_TABLE
MODE IS 4.5, OR 6 MOVE TO BW CARD ROW OF INIT_TABLE
8X POINTS TO CORRECT ROW OF INITIALIZATION TABLE
t.49:
PUSH
AX
"OV XCHG
AX.[BX+IOJ AH,AL
PUSH
OS
ASSUME OS:DATA
CALL
DDS
MOV
.CURSOR t.40DE. AX
ASSUME DS:cODE-
POP
OS
XOR
AH,AH
; OUT INIT J SAVE NODE IN (All
r GET THE CURSOR MODE FROM THE TABLE
I PUT CURSOR MODE IN CORRECT POSITION ; SAVE TABLE SEGMENT PO INTER
POINT OS TO DATA SECMENT PLACE INTO BIOS DATA SAVE AREA
RESTORE THE TABLE SEGMENT POINTER AH IS REGISTER NUt.4BER DURING LOOP
LOOP THROUGH TABLE, OUTPUTTING REGISTER AODRESS, THEN VALUE FROM TABLE
5-64 VIDEO (01/10/86)
ISM Personal Computer MACRO Assembler Version 2.00 VIDEO ---- 01/10/8& VIDEO DISPLAY SIOS
1-'
01-10-86
343
3" 3'5 3·· 3.7 346 340 350 351 352 353
35' 355 35. 357 356 359
33..0,
3.2 3.3 3 ·· 3.5 3·· 3.7 3·· 3.0 370 371 372 373 37. 375 37. 377 378 379 380 381 3.2 3.3
36' 365 386 387 388 360 300 391 392 393 394 395 396 397 398 399 400 .01 .02
'03 404 405 40& 407 408 409
..,,..410
.4,121
"3
'15
417
.4,106
'20 421 422
'23 42.
.'225.
427 426
'20 430 431 432
''333'
435 43& 437 438 439 440 441 .42 443 444 445 44& 447 448 449 450 451 452 453 454 455 456
0001 0001 8A C4 0003 EE 0004 42 0005 FE C4 0007 8A 07 0009 EE OODA 43 0008 4A OODC E2 F3 OODE 58 OOOF IF
OOEO 33 FF 00E2 89 3E 004E R 00E6 C6 06 0062 R 00 OOEB B9 2000 OOEE 3C 04 OOFO 72 OA 00F2 3C 07 00F4 74 04 OOF& 33 CO 00F8 EB 05 OOFA OOFA 85 08 OOFC OOFC 88 0720 OOFF OOFF F3/ A8
0101 88 1& 00&3 R 010583 C2 04 0108 AO 00&5 R 0108 EE
OlOC 2E: 8A 84 0000 E 011198 0112 A3 004A R
011581 E& OOOE 0119 2E: 88840000 E OIIE A3 004C R 0121 89 0008 0124 8F 0050 R 0127 IE 0128 07 0129 33 CO 0128 F3/ A8
0120 42 012E 80 30 0 I 30 80 3E 0049 R 0& 0135 7502 013780 3F 0139 0139 EE 01 3A A2 00&& R
0130 0130 50
o13E 5F o13F 5E
0140 58 0141 0141 59 0142 5A 0143 IF 0144 07 0145 CF 0146
0146 0146 84 OA 0148 89 OE 0060 R 014C E8 0151 R 0141=" EB EC
0151 0151 88 16 0063 R 0155 8A C4 0157 EE 0158 42 0159 8A C5 015B EE 0 15C 4A 0150 8A C4 01 SF FE CO 01&1 EE 01&2 42 0 I &3 8A C 1
10110:
MOV OUT INC [NC MOV OUT [NC
DEC LOOP POP POP ASSUME
AL,AH OX,AL OX AH AL, [BXJ DX,AL BX OX M[O
AX OS OS:DATA
I INITIALIZATION LOOP I GET 6845 RECi I STER NUMBER
1 POINT TO DATA PORT 1 NEXT RECi I STER VALUE 1 GET TABLE VALUE lOUT TO CHIP 1 NEXT IN TABLE 1 BACK TO PO INTER RECi I STER 1 DO THE WHOLE TABLE 1 CiET MODE BACK INTO {AL I 1 RECOVER SECiMENT VALUE
FILL RECiEN AREA WITH BLANK
Mil: 10112: 10113:
XOR MOV MOV MOV CMP JC CMP JE XOR JMP
MOV
MOV
REP
01,01 (tCRT_START ,0 I (tACT I VE_PACiE. 0 CX,8192 AL,4 MI2 AL,7 Mil AX,AX SHORT 10413
CH,08H
AX, ' +7-H
STOSW
SET UP PO I NTER FOR RECiEN START ADDRESS SAVED IN CiLOBAL SET PACiE VALUE NUMBER OF WORDS I N COLOR CARD TEST FOR CiRAPH I CS NO GRAPHICS INIT TEST FOR BW-CARO
BW CARD INIT FILL FOR CiRAPHICS MODE
CLEAR BUFFER BW CARO INIT BUFFER SIZE ON BW CARD (20481 NO GRAPHICS INIT FILL CHAR FOR ALPHA + ATTR I 8UTE I CLEAR BUFFER I FILL THE RECiEN BUFFER WITH BLANK S
ENABLE V IDEO AND CORRECT PORT SETT I NG
MOV
ADD MOV OUT
OX ,(tAOOR 6845
OX,4
AL, (tCRT MODE SET
DX,AL -
1 PREPARE TO OUTPUT TO V IDEO ENABLE PORT 1 PO I NT TO THE MODE CONTROL RECi I STER I GET THE MODE SET VALUE 1 SET V IDEO ENA8LE PORT
;----- OETERMINE NUM8ER OF COLUMNS, 80TH FOR ENTIRE DISPLAY ANO THE NUM8ER TO 8E USEO FOR TTY I NTERFACE
; -----
MOV
CBW MOV
AL,CS: [SI + OFFSET M6J (tCRT_COLS,AX
SET CURSOR POS I TI ONS
CiET NUM8ER OF COLUMNS ON TH I S SCREEN CLEAR HI CiH BYTE I NIT I AL I ZE NUM8ER OF COLUMNS COUNT
AND MOV MOV MOV
MOV
PUSH POP XOR REP
SI,OOOEH
AX,CS: [SI + OFFSET M5J
(tCRT LEN, AX
CX,8-
01 ,OFFSET (tCURSOR POSN
OS
ES
AX,AX
STOSW
WORO OFFSET I NTO CLEAR LENCiTH TA8LE LENCiTH TO CLEAR SAVE LENCiTH OF CRT -- NOT USEO FOR BW CLEAR ALL CURSOR POS I T IONS
ESTA8L I SH SECiMENT ADDRESSINCi
1 FILL WITH ZEROES
SET UP OVERSCAN RECiISTER
10114:
INC MOV CMP JNZ MOV
OUT MOV
OX AL,30H (tCRT MODE.& 10414 AL,3FH
DX,AL (tCRT_PALETTE. AL
SET OVERSCAN PORT TO A DEFAULT 30H VALUE FOR ALL MODES EXCEPT 640X200 SEE I F THE MODE IS 640X200 8W I F NOT 640X200, THEN CiO TO RECiULAR IF [T [5 640X200, THEN PUT IN 3FH
OUTPUT THE CORRECT VALUE TO 309 PORT SAVE THE VALUE FOR FUTURE USE
NORMAL RETURN FROM ALL V IDEO RETURNS
VIOEO_RETURN:
POP
BP
POP
D[
POP
51
POP
BX
10115:
POP
CX
I V I DEO_RETURN_C
POP
OX
POP
OS
POP
ES
RECOVER SECiMENTS
IRET
ALL DONE
SET_MODE
; ---------
-
-
-
-
-
-E-N-D-P-----
-------
--------------------
; SET CTYPE
;
- TH I S ROUTI NE SETS THE CURSOR VALUE
; INPUT
;
,CX) HAS CURSOR VALUE CH-START LINE, CL-STOP LINE
I OUTPUT
; ~~;
- NONE
~;~;~ - - -
-
-
--;~~~
-
-
-
-
~~;~
-
-
-
-
-
-
-
-
-
-
--------------
-
MOV
AH. 10
MOV
(tCURSOR MOOE.CX
CALL
104 16
-
JMP
VIDEO_RETURN
1 6845 RECi 1STER FOR CURSOR SET I SAVE IN DATA AREA 1 OUTPUT CX REG I STER
1----- THIS ROUTINE OUTPUTS THE CX REGISTER TO THE 6845 RECiISTERS NAMED IN 'AHI
10416:
MOV MOV OUT
INC MDV
OUT DEC MOV
INC OUT
INC MOV
OX, (tAOOR &845 AL,AH -
DX.AL OX
AL.CH OX,AL
OX AL,AH AL DX,AL OX AL,CL
ADDRESS RECi I STER CiET VALUE RECi I STER SET DATA RECiISTER DATA
POINT TO OTHER DATA REGISTER SET FOR SECOND REGISTER
1 SECOND DATA VALUE
VIDEO (01/10/86) 5-65
IBIoi Personal Co",puter MACRO Asse",bler Version 2.00 VIDEO ---- 01/10/86 VIDEO DISPLAY 8105
'-5 01-10-66
..451
456 459
, ·· 0
0165 EE 0166 C3 0167
,·.·32
...··· ...'.7
.70 411 0161
472 0167 8A C7 413 0169 95
474 016A 01 EO 475 016C 96 476 0160 89 94 0050 R
471 0 III 35 3E 0062 R 478 0175 75 05 479 0171 88 C2 480 0119 E5 017E R 481 OITC
482 a 11C EB 6F
···463 a I 7E ·····5
467 017E
456 ailE E8 0200 R 489 a lSI 88 C8 490 0163 03 OE 004E R 491 0181 01 F9
492 018984 OE
......493 018S E8 0151 R
494 Ol8E C3 495 Ol8F
,.7
,'9
500 50 ,
502 503
50' 505 506 018F 507 018F 8A OF
506 0191 32 FF 509 0193 01 E3 510 01955891 0050 R 51 1 0199 68 OE 0060 R 512 019050 513 019E 5F
514 019F 5E 515 OIAO 58 516 OIAI 56 517 01A258
515 0lA3 IF 519 0lA401
520 0lA5 CF 521 0lA6 522 523
52' 52' 52. 527 52.
52' 530 531 0lA6
532 0lA6 A2 0062 R 533 01A9 98 534 OIAA 50 535 0lA8 FT 26 004C R 536 OlAF A3 004E R 537 0182 88 C5
535 0184 01 F9 539 0186 B4 OC
540 0lB8 E5 0151 R 541 018S 58
542 018C 01 E3 543 OIBE 68 67 0050 R 544 0lC2 E5 OITE R
545 0lC5 E9 0130 R 546 OICS 5.7 5··
5"
550 55 ,
552 .53 55. 555 55.
·5·5·7
55'
55..0,
5.2 563 olce
564 olce 68 16 0063 R 565 OICC 63 C2 05
566 01 CF AO 0066 R 567 0102 OA FF
5.'568 0104 75 DE
570
OUT _ET
SET_CTYPE
OX,AL ENoP
I ALL DONE
; --- -- - - - -- - - - ------------ -- -------------- -
; SET CPOS
;
- TH I S ROUT I NE SETS THE CURRENT CURSOR POS I T I ON TO THE
;
NEW X-V VALUES PASSED
; INPUT
;
OX - ROW,COLUIoiN OF NEW CURSOR
BH - DISPLAY PAGE OF CURSOR
OUTPUT
- ---------- ----- CURSOR IS SET AT 6845 IF DISPLAY PAGE IS CURRENT DISPLAY
~E~ ~;~;--------;~~~----~E;~--
Mil:
1oi0V
caw
SAL XCHG ~~~
,JNZ IoiOV C...LL
AL,BH
; MOVE PAGE NUIoiBER TO WORK REGISTER
I CONVERT PAGE TO WORD VALUE
AX,I
I WORD OFFSET
AX,SI
I USE INDEX REGISTER
!~~;~~~s~rG:~~~SOR_POSNI,DX
; SAVE THE POINTER
Ioi 17
-
AX,DX
Ioi 18
V IDEO RETURN ENOP
SET CPOS RETURN GET-ROW/COLUIoiN TO "'X CURSOR SET SET_CPOS_RETURN
SET CURSOR POSITION, ...X H... S ROWICOLUMN FOR CURSOR
"I.
PROC
NE ... R
C...LL
POS I TI ON
DETERIoiINE LOCATION IN REGEN BUFFER
"OV
CX,AX
AOO
CX,tlCRT ST ...RT
ADO I N THE START ADDRESS FOR TH I S PAGE
5A_
CX,I -
DIVIDE BY 2 FOR CH...R ONLY COUNT
"OV CALL
",."'H,14
REGISTER NUM8ER FOR CURSOR OUTPUT THE V...LUE TO THE 6645
RET
"; '-8-
-
-
--
-- ENDP
----
-
---- ----------------------- ----------
; READ CURSOR
;
- THIS ROUTINE READS THE CURRENT CURSOR V...LUE FROM THE
;
6845, FORIoi",TS IT, ...ND SENDS IT B...CK TO THE C...LLER
; INPUT
8H - P...GE OF CURSOR OUTPUT
ox - ROW. COLUMN OF THE CURRENT CURSOR POSITION CX - CURRENT CURSOR IoiOoE
~~;~-~~~;~~-----;R~C----~~ ~~ ----- ----------
-
MOV
BL.BH
XOR
BH,BH
S...L
BX, 1
I WORD OFFSET
1oi0V
OX, (eX+OFFSET _CURSOR_POSN)
IoiOV
CX ,ttCURSOR MODE
PDP
8P
POP
OJ
POP
S I
POP
ex
POP
... X
I 0 I SC",RO S...VED CX AND ox
POP
... X
POP
as
POP
ES
IRET
:-READ_CURSOR ~~;-~;;;-;;~E
-E-N-D-P----------
----------
---------
I
- THTs ROUTINE SETS THE ACTIVE DISPLAY P...GE, ALLOWING
I
THE FULL USE OF THE IoiEMORY SET ASIDE FOR THE VIDEO ",TT"'CHIoiENT
; INPUT
;
AL H... S THE NEW ACT I VE 01 SPLA Y PAGE
; OUTPUT
I
THE 6845 IS RESET TO DISPLAY TH...T PAGE
1-------------- - - - - --------------------- - - ----
",CT a I SP PAGE
-
~~~
PROC
NE ... R
ttACT I VE_P...GE, ...L
; S",VE ACTl VE PAGE V...LUE
I CONVERT (AL) TO WORD
PUSH
AX
I S",VE PAGE VALUE
MUL 1oi0V
WORD PTR _CRT LEN .CRT_START ....X-
I DISPLAY PAGE TIIoiES REGEN LENGTH
I S",VE START ADDRESS FOR LATER
MOV
CX,AX
I ST...RT ADDRESS TO CX
S ...R
CX,!
I DIVIDE BY 2 FOR 6645 HANDLING
1oi0V C... L L
"'H,le 1oi16
I 6845 REGI STER FOR START ADORESS
POP
ex
I RECOVER PAGE VALUE
SAL
eX,1
I -2 FOR WORD OFFSET
MOV
AX, (BX + OFFSET _CURSOR POSN] I GET CURSOR FOR THIS PAGE
C"'LL
Ioile
-; SET THE CURSOR POS I T 1ON
,JMP
V IOEO RETURN
";,C- T-_-0--I -SP-_-P-.-..-G-E----E-N-D--P- ------ --------- --- - ----
; SET COLOR
;
THIS ROUTINE WILL EST...BLISH THE B"'CKGROUND COLOR, THE OVERSC...N COLOR,
;
AND THE FOREGROUND COLOR SET FOR MEDIUIoi RESOLUTION GRAPHICS
; INPUT
;
ISH) HAS COLOR 10
;
IF BH=O, THE B",CKGROUNO COLOR V"'LUE IS SET
;
FROM THE LOW BITS OF BL 10-31)
IF 8H= 1, THE PALETTE SELECT I ON 1S Ioi"'DE
S ... SED ON THE LOW BI T OF BLI
= o GREEN, RED, YELLOW FOR COLORS 1,2,3
I = 8LUE, CYAN. MAGENT", FOR COLORS 1,2,3
IBLl H"'S THE COLOR VALUE TO BE USED OUTPUT
- ------ ----- ------------- THE COLOR SELECT I ON IS UPD...TEO
~~~ ~~~~~
-;R~~---- ~~~~
-
IoiOV
ADD
IoiOV
OR
,JNZ
oX .....DOR 6845
OX, 5
-
AL.tteRT P...LETTE
8H,8H -
1oi20
110 PORT FOR PALETTE
OVERSC...N PORT
GET THE CURRENT PALETTE IS THI SCaLaR 01
OUTpUT COLOR I
VALUE
;----- H...NDLE COLOR 0 SY SETTING THE 8ACKGROUND COLOR
5-66 VIDEO (01/10/86)
IBM Personal Computer MACRO Assembler Version 2.00 VIDEO ---- 01/10/66 VIDEO DISPLAY BIOS
1-.
01-10-66
511 512 513 514
515 516 511 518 519
55..0,
582 583
58~
585 586 581 588 5.9 590 591 592
59' 59. 595 596 591 598 599 600 60t 602 603 604 605
..00..."
0106 2~ EO 0108 80 E3 IF OIOB OA C3 0100 0100 EE 0 IDE A2 0066 R OIEI E9 0130 R
01E4 0 1E~ 2~ OF 0lE6 DO EB 0 I E8 13 F3 0 I EA OC 20 OIEC EB EF 0 I EE
0 lEE 0 lEE 8A 26 004A R 01F2 AO 00~9 R 01 F5 8A 3E 0062 R 0lF9 50 OIFA 5F OIFB 5E OIFC 59 01FO E9 0141 R 0200
.09
....11',"210,
6t5 0200 616 0200 53 611 0201 93 618 0202 AO 004A R 619 0205 F6 E1 620 0201 32 FF 621 0209 03 C3 622 020B OlEO 623 0200 5B 62~ 020E C3 625 020F
..22...21
.,......2''""029 .,..'5 .,.."
.'9
·· 0
.".'2 020F
.....,.'5 020F E8 02EA R 021280 FC 04
.... 0215 12 08 , 0211 80 FC 01
...'9 021A 1~ 03 02lC E9 04AC R
.50 021F
.51 021F 53
.52
..55.'.55 .5..51 .5..59
··0
..,··2 ...........,,··5
0220 88 C 1
0222 E8 025C R 0225 14 31
0221 03 FO
0229 8A E6
022B 2A E3
0220 0220 E6 0290 R
0230 03 F5
0232 03 FO
0234 FE CC 0236 15 F5 0238
0238 58
0239 BO 20
0238 023B E8 02A6 R
··9
. ".11
........,,,,,,""259...··0
.......,,
··2
023E 03 FO
02~0 FE CB
0242 15 F1
0244 0244 E8 0000 E 0241 80 3E 00~9 R 01
024C 14 01 024E AO 0065 R
0251 BA 0308
0254 EE
0255 0255 E9 0130 R 0258
0256 8A DE 025A EB DC
025C
10419: ; -----
AND AND OR
OUT
""O"PV
AL,OEOH BL,OIFH AL,BL
OX,AL "CRT PALETTE, AL VIDEO_RETURN
TURN OFF LOW 5 BITS OF CURRENT TURN OFF HIGH 3 BITS OF INPUT VALUE PUT VALUE INTO REGISTER OUTPUT THE PALETTE OUTPUT COLOR SELECT I ON TO 309 PORT SAVE THE COLOR VALUE
HANDLE COLOR I BY SELECT I NG THE PALETTE TO BE USED
104201
AND
AL,ODFH
TURN OFF PALETTE SELECT BIT
SHR
BL,I
TEST THE LOW ORDER BIT OF BL
JNC
10419
ALREADY DONE
OR
AL,20H
TURN ON PALETTE SELECT BIT
JMP
10419
GO DO IT
S;E-T-_-C-O-L-O-R--------E-N-O-P------------------------------
; VIDEO STATE
; RETURNS THE CURRENT VIDEO STATE IN AX
; AH:;: NUMBER OF COLUMNS ON THE SCREEN
; AL:;: CURRENT V IDEO MODE
; BH:;: CURRENT ACT I VE PAGE
~~ ~~~- ~~~~~- ----;;~~--- -~~~; ---------------- -----
- MOV MOV
~g~
AH,BYTE PTR "CRT COLS
AL, "CRT MODE
-
~~' "ACTIVE_PAGE
GET NUMBER OF COLUMNS
CURRENT MODE
~~60;~=R~~~ I ~~~~~E PAGE
POP
01
POP
SI
POP
CX
01 SCARD SAVED BX
JMP
104 15
RETURN TO CALLER
V;-ID-E-O--_S-T-A--T-E------E-N-D-P--------------------
; POSITION
;
THIS SERVICE ROUTINE CALCULATES THE REGEN BUFFER ADDRESS
I
OF A CHARACTER I N THE ALPHA MODE
; INPUT
;
AX :;: ROW, COLUMN POSITION
; OUTPUT
-- --- ---- ;
AX " OFFSET OF CHAR POSITION IN REGEN BUFFER
~~~ ~; ~ ~~ - - - - - - ;;~~ - ~~~; - - --- - --
PUSH
BX
SAVE REGISTER
XCHG
BX,AX
SAVE ROW/COLUNM POSITION IN (BX)
MOV
AL, BYTE PTR "CRT COLS
GET COLUMNS PER ROW COUNT
MUL
BH
-
OETERM I NE BYTES TO ROW
XOR
BH,BH
ADD
AX,BX
ADD I N COLUMN VALUE
SAL
AX, I
· 2 FOR ATTRIBUTE BYTES
POP
BX
RET
P;O--S-IT-I-O-N---------E-N--D-P----------------------
; SCROLL UP
;
TH I S ROUT I NE MOVES A BLOCK OF CHARACTERS UP
;
ON THE SCREEN
; INPUT
, (AH) " CURRENT CRT MODE
, (AL) " NUMBER OF ROWS TO SCROLL
, ICX) :;: ROW/COLUMN OF UPPER LEFT CORNER
, lOX) :;: ROW/COLUMN OF LOWER RIGHT CORNER
, IBH) :;: ATTRIBUTE TO BE USED ON BLANKED LINE
, (OS) :;: DATA SEGMENT
, (ES) :: REGEN BUFFER SEGMENT
, OUTPUT
,;------------------------------------------ NONE - - THE REGEN BUFFER I S MOD I F I ED
ASSUME OS: DATA, ES I DATA
SCROLL_UP
PROC
NEAR
CALL
C"P "C C"P "E ""P
Nl ; PUSH
"OV CALL
"Z ADO "OV SUB N2: CALL ADO ADO DEC "NZ N3: POP "OV N4; CALL ADO DEC
"NZ N5:
CALL
C"P "E "OV "OV OUT N6:
""P
N1:
"OV
""P SCROLL_UP
TEST_LINE_COUNT
AH,~
NI AH,1 NI
GRAPHICS_UP
BX AX,CX SCROLL_POS I T I ON N1 SI,AX AH,OH AH,BL
NIO SI,BP DI,BP AH N2
AX AL, '
Nil DI,BP BL N'
ODS "CRT_MODE, 1 N. AL, "CRT_ MODE_SET DX,03D8H DX,AL
V IDEO_RETURN
BL,DH N'
ENOP
TEST FOR GRAPH I CS MODE HANDLE SEPARATELY TEST FOR BW CARD
UP CONT INUE SAVE FILL ATTRI8UTE IN 8H UPPER LEFT POSITION DO SETUP FOR SCROLL 8LANK FIELD FROM ADDRESS · ROWS IN 8LOCK · ROWS TO 8E MOVED ROW LOOP MOVE ONE ROW
PO I NT TO NEXT LI NE IN BLOCK COUNT OF LINES TO MOVE ROW LOOP CLEAR ENTRY RECOVER ATTR I BUTE IN AH FILL WITH BLANKS CLEAR LOOP CLEAR-THE ROW POINT TO NEXT LINE COUNTER OF LINES TO SCROLL CLEAR LOOP SCROLL_END
I S TH I S THE BLACK AND WH I TE CARD IF SO, SK I P THE MODE RESET GET THE VALUE OF THE MODE SET ALWAYS SET COLOR CARD PORT
1 V IDEO_RET_HERE
BLANK FIELD
GET ROW COUNT
GO CLEAR THAT AREA
VIDEO (01/10/86) 5-67
IBM P.".onel COlllpute,. MACRO Asselllb I.,. V.,.. I on 2.00 VIDEO ---- 01/10/86 VIDEO DISPLAY 810S
········7
688 689 690 691 692 693 694 695 696 697 696 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 7 I 7 718 719 120 721 722 723 724 725
7'. 7.7 728 129 130 731 732 733 134 735 136 737 738 139 740 741 742 743
,..,..744
745
7.7
,.9
775.0'
7 ·· 7.3 7 ·· 755
7 ·· 7.7 7·· 759 7.0 76. 762 763 164 165 766 767 768 769 770 111 112 113 774 775 77& 777 778 779 780 181 782 783 764 785 78& 767 786 789 790 791 792 793 794 795 79b
025C 025C E8 0200 R 025F 03 06 004E R 0263 5B F5 0265 8B FO 0267 2B 01 0269 FE C6 026B FE C2 0260 32 EO 026F 8B 2E 004A R 0273 03 ED 0275 AO 004A R 0278 F6 E3 027A 03 CO 021C 50 0210 AO 0049 R 0280 06 0281 IF 0282 3C 02 0284 12 13 0286 3C 03 0288 11 OF
028A 52 028B BA 030A 028E 028E EC 028F A8 08 0291 74 FB 0293 BO 25 0295 B2 08 0297 EE 0298 5A 0299 0299 58 029A OA 08 029C C3 0290
0290 0290 8A CA 029F 56 02AO 57 02AI F3J A5 02A3 5F 02A4 5E 02A5 C3 02A6
02A6 02A6 8A CA 02A8 57 02A9 F'31 AB 02AB SF 02AC C3 02AD
02AO 02AD FD OUE E5 02EA R 02B I 80 FC 04 02B4 72 08 0286 80 FC 07 02B9 74 03 02BB E9 0503 R 02BE 028£ 53 02BF 8B C2 02CI E8 025C R 02C4 74 20 02e6 28 FO 02C8 8A E6 02CA 2A E3 02CC 02CC E8 0290 R 02CF 2B F5 0201 2B FD 0203 FE CC 0205 75 F5 0207 0207 58 0206 80 20 020A 020A E8 02A6 R 0200 2B FD 020F FE CB 02EI 15 F7 02E3 E9 0244 R 02E6 02E6 8A DE 02E8 E8 ED 02EA
: ----- HANDLE COMMON SCROLL SET UP HERE
SCROLL POS I T I ON PROC
NEAR
- CALL
POSITION
ADD
AX, etCRT START
1010'1
OI,AX
MOV
SI,AX
SUB
OX,CX
INC
OH
INC
DL
XOR
CH.CH
~g~
:~:~RT_COLS
MOV MUL
ADD PUSH ~~~H
AL,BYTE PTR .CRT COLS
BL
AX,AX
AX
~~. etCRT_MODE
POP
OS
CMP
AL,2
J8
N9
CMP
AL,3
;----- JA
N9
PUSH
MOV
ox
OX.3DAH
N8:
'N
AL,DX
TEST
"Z
N.AL,RVRT
MOV
AL,25H
MOV
OUT
POP
DL,008H DX,AL
ox
N9:
POP
OR
BL,BL
RET
SCROLL_POS 1T 1ON ENDP
1----NIO
N.O
MOVE ROW
PROC- NEAR
MOV PUSH
CL.oL 51
PUSH
01
REP
MOVSW
POP
01
POP
51
RET
ENDP
CONVERT TO REGEN POINTER OFFSET OF ACT I 'IE PAGE TO ADDRESS FOR SCROLL FROM ADDRESS FOR SCROLL OX · 'ROWS, .COLS I N BLOCK
INCREMENT FOR 0 ORIGIN SET HIGH BYTE OF COUNT TO ZERO GET NUMBER OF COLUMNS IN DISPLAY TIMES 2 FOR ATTRIBUTE BYTE GET CHARACTERS PER LINE COUNT DETERM 1NE OFFSET TO FROM ADDRESS -2 FOR ATTRIBUTE SYTE SAVE LINE COUNT GET CURRENT MODE ESTABLISH ADDRESSING TO REGEN BUFFER
FOR SOTH POINTERS TEST FOR COLOR CARD SPEC I AL CASES HERE HAVE TO HANDLE 80X25 SEPARATELY
1 80X25 COLOR CARD SCROLL
GUARANTEED TO BE COLOR CARD toERE WAIT DISP ENABLE I GET PORT I WA I T FOR VERTI CAL RETRACE I WA I T_0 I SP_ENABLE
ADDRESS CONTROL PORT TURN OFF VIDEO DURING VERTICAL RETRACE
RESTORE LINE COUNT
o SCROLL MEANS BLANK F I ELO
RETURN WITH FLAGS SET
1 GET · OF COLS TO MOVE
SAVE START ADDRESS MOVE THAT LINE ON SCREEN
I RECOVER ADDRESSES
CLEAR ROW
PROC - NEAR
MOV PUSH
CL,OL 01
, GET , COLUMNS TO CLEAR
REP POP
STOSW 01
I STORE THE FILL CHARACTER
RET
Nll
;--
-
-
-
-
-
--ENDP
--
-
-
--
-
--
---------------------
; SCROLL DOWN
THIS ROUTINE MOVES THE CHARACTERS WITHIN A DEFINED
BLOCK DOWN ON THE SCREEN, FILLING THE TOP LINES
WITH A DEFINED CHARACTER INPUT
(AHI '"' CURRENT CRT MODE
= IALI .. NUMBER OF LI NES TO SCROLL
ICX) UPPER LEFT CORNER OF REG I ON ID,X) .. LOWER RIGHT CORNER OF REG I ON IBH) .. FILL CHARACTER (OS) " DATA SEGMENT
(ES I = REGEN SEGMENT
1 OUTPUT
1
NONE -- SCREEN I S SCROLLED
1------------------- --------------------
SCROLL DOWN - STO
CALL
C"P .JC
CM.
"E
"MP NI21
PUSH MOV CALL
"sZua
NOV
N13:
SUB
PROC
NEAR
TEST LINE COUNT
AH ....-
-
N"
AH,7
N" GRAPH I CS_DOWN
ax
AX,DX
SCROLL_POS I TI ON N ··
SI,AX AH,DH AH,BL
DIRECT I ON FOR SCROLL DOWN
TEST FOR GRAPHICS
I TEST FOR BW CARD
CONT I NUE DOWN SAVE ATT" I BUTE IN SH LOWER RIGHT CORNER GET REGEN LOCATION
51 I S FROM ADDRESS GET TOTAL · ROWS COUNT TO MOVE IN SCROLL
CALL SUB
N" S I ,SP
· MOVE ONE ROW
SUB
OJ ,SP
DEC
AH
"NZ NI4,
po.
NOV N15:
N13
AX AL.'
I RECOVER A TTR ISUTE IN AH
CALL SUB OEC
Nll DI.Bf>
aL
CLEAR ONE ROW GO TO NEXT ROW
Nlbl
"NZ "M.
N.S NS
· SCROLL_END
NOV
""P SCROLL_DOWN
BL,DH
N'. ENDP
5-68 VIDEO (01/10/86)
IBM Per~on.1 Computer MACRO Assembler Version 2.00
VIDEO ---- 01/10/66 VIDEO DISPLAY BIOS
..,,,.,
PAGE ;-----
IF AJ040UNT OF LINES TO BE SCROLLED. AMOUNT OF LINES IN WINOOW THEN ADJUST AL I ELSE RETURN;
.00
801 02EA
TEST_LiNE_COUNT PROC
NEAR
.02
803 02EA 8A 08 804 02EC OA CO
MOV OR
BL,AL AL,AL
SAVE LINE COUNT IN BL TEST IF AL IS ALREADY ZERO
805 02EE 74 OE 80b 02FO 50
JZ PUSH
BL SET AX
I F IT I S THEN RETURN ··· SAVE AX
807 808 809
02Fl 8A Cb 02F3 2A C5 02F5 FE CO
NOV
SUB [NC
AL.OH AL,CH AL
SUBTRACT LOWER ROW FROM UPPER ROW ADJUST DIFFERENCE BY 1
810 811 812
02F7 3A C3 02F9 58 02FA 75 02
C"P POP
JNE
AL,BL
AX BL SET
LINE COUNT = AMOUNT OF ROWS IN WINOOW?
RESTORE AX ,F NOT THEN WE'RE ALL SET
813 02FC 2A DB 814 02FE
SUB
BL-;-BL
OTHER" SE SET BL TO ZERO
815 02FE C3 816 02FF
RET TEST_LiNE_COUNT ENDP
I RETURN
.8,181
; -~~;~-;~-~~~~~~;- - ------------- --------- - - - - - - - - - - ---------------------- ------
81'
820
- THIS ROUTINE READS THE ATTRIBUTE AND CHARACTER AT THE CURRENT
821
CURSOR pas I T 1ON AND RETURNS THEM TO THE CALLER
822
INPUT
823
I AH) · CURRENT CRT MODE
.2.824
825
IBHI = 01 SPLAY PAGE I ALPHA MODES ONLY) (OS) = DATA SEGMENT IES) = REGEN SEGMENT
82'
OUTPUT
..228'
.30
(AL I = CHARACTER READ
; --------IA-H--) --=--A-T-T-R-IB-U-T-E--R-E-A-D-------------- -- ------------ -------- ------------- - - I
831
ASSUME oS:DATA,ESIDATA
832
833 02FF
.3.83-4 02FF 80 FC 04
835 0302 72 08
READ AC CURRENT PROC
- -ChIP
AH,04-
JC
Pl0
NEAR
I IS THIS GRAPHICS
.3.837 0304 80 FC
838 0307 74 03
CNP JE
AH,7 Poo
I IS THIS BW CARD
840 841 842
843 844 845
',<41'
84. 849 850
851 852 853 854
855 856 857 858 859 860 8b 1 862
..863
,.8'654
866
0309 E9 063E R 030C 030C E8 0328 R 030F 88 F7 0311 06 0312 IF
0313 OA DB 0315 75 00 0317 0317 FB 0318 90 0319 FA 031A EC 031B A8 01 0310 75 F8 031F 031F EC 0320 A8 09 0322 74 FB 0324 0324 AD 0325 E9 0130 R
0328
PIOI
JNP
CALL NOV PUSH POP
CRAPHICS_READ
FINO POSITION SI,DT ES
as
READ AC CONT I NUE GET RECEN LOCATION AND PORT ADORESS ESTABLISH ADDRESSING IN SI CEl RECEN SECMENT FOR QU I CK ACCESS
1----- WAIT FOR HORIZONTAL RETRACE OR VERTICAL RETRACE IF COLOR 80
PI I:
P12: P13:
OR JNZ
STI Nap CLI [N TEST JNZ
[N TEST JZ
LOOSW ..IMP
BL,BL PI3
AL,DX AL, RHRZ PII AL,DX AL.RVRT+RHRZ P[2
V IDEO_RETURN
CHECK MODE FLAG FOR COLOR CARD IN 80 ELSE SKIP RETRACE WAIT - 00 FAST READ
WA I T FOR HORZ RETRACE LOW OR VERT I CAL ENABLE INTERRUPTS FIRST ALLOW FOR SMALL INTERRUPT W' NOOW BLOCK I NTERRUPTS FOR SINGLE LOOP GET STATUS FROM THE ADAPTER IS HOR I ZONTAL RETRACE LOW WAIT UNTIL IT IS
NOW WAIT FOR EITHER RETRACE HIGH CET STATUS I S HOR I ZONTAL OR VERT I CAL RETRACE HI CH WAIT UNTIL EITHER IS ACTIVE
GET THE CHARACTER AND ATTR I BUTE EXIT WITH lAX)
READ_AC_CURRENT ENDP
·8····
870 871
872 873 874
875 876 877 878 879 880
881 882 883
584 885 886
.81 888
889 890 891 892
893 894 895 896
.8'987
899
0328 0328 86 E3 032A 89 E8
onc 80 E8 02
032F 00 E8 0331 8A C7 0333 98 0334 88 F8 0336 01 E7 0338 88 95 0050 R 033C 74 09
033E 33 FF 0340 0340 03 3E 004C R 0344 48 0345 75 F9
0347 0347 AO 004A R 034A F6 E6 034C 32 F6 034E 03 C2 0350 01 EO 0352 03 F8 0354 88 16 0063 R 0358 83 C2 06 035B C3
Ol5C
FIND POSITION
-
XCHC
NOV
SUB
SHR
MOV
CB.
NOV
SAL
NOV
JZ
P201
XOR
ADD DEC .JNZ
P21 :
MOV MUL
XOR
ADD SAL ADD MOV ADD RET
FIND_POSITION
PROC
NEAR
SETUP FOR BUFFER READ OR WR' TE
AH,BL
SWAP MODE TYPE WI TH ATTR 18UTE
BP,AX
SAVE CHARACTER/ATTR IN IBP) REGISTER
BL,2
CONVERT DISPLAY MODE TYPE TO A
BL,l
ZERO VALUE FOR COLOR IN 80 COLUMN
AL,BH
MOVE DISPLAY PAGE TO LOW BYTE
CLEAR HI CH BYTE FOR BYTE OFFSET
DI.AX
MOVE DISPLAY PACE ICOUNT) TO WORK REC
01, I
I TIMES 2 FOR WORD OFFSET
ox, [01 +OFFSET OCURSOR_POSN]
I CET ROW/COLUMN OF THAT PACE
P21
I SKIP BUFFER ADJUSTMENT IF PACE ZERO
01,01
I ELSE SET BUFFER START ADDRESS TO ZERO
0 I ,ClCRT LEN
AX
-
P20
ADD LENCTH OF BUFFER FOR ONE PAGE DECREMENT PAGE COUNT LOOP TI LL PAGE COUNT EXHAUSTED
AL.BYTE PTR OCRT COLS
DH
DH.OH
AX,OX
AX,1
DI.AX
ox .oADOR 6845
DX.6
-
ENDP
DETERMINE LOCATION IN REGEN IN PAGE
CET COLUMNS PER: ROW COUNT
DETERM I NE BYTES TO ROW
ADD I N COLUMN VALUE
· 2 FOR ATTRIBUTE BYTES
ADD LOCATION TO START OF REGEN PAGE
GET 9ASE ADDRESS OF ACTIVE DISPLAY
DX= STATes PORT ADDRESS OF ADAPTER BP= ATTRIBUTE/CHARACTER IFROM BL/ALI 01" POSITION 10FFSET IN RECiEN BUFFER) BL: MODE FLAG I ZERO FOR 80X25 COLOR)
VIDEO (01/10/86) 5-69
IBM Perllonel Computer MACRO Aaaembler V.raion 2.00 VIDEO. ---- 01/10186 VIDEO DISPLAY 810S
1-'
OI-IO-fl6
900 901 90'
.0.·9·.3·
90b 901 90.
90'
.91110
'"'13
"''""b
9 17 035C
918 035C 80 FC 04 919 035F 72 08
920 0361 80 FC 07 921 0364 74 03 922 0366 E9 05SA R 923 0369 924 0369 E8 0328 R ·· 5 926 036C OA DB 927 036E H 06 ··8 929 0370 95 930 0371 F3/ A8
931 0373 EB 16 932 933
'3'935 0375
936 0375 95 937 0376 938 0376 FB 939 0377 90 940 0378 FA. 941 0379 EC 9-42 037A AB 08 9-43 037C 75 09 9-44 037E AB 0 I
945 0380 75 F4 946 0382 947 0382 EC 948 03B3 A8 09 949 0385 14 FB 950 0387 951 0381 95
952 0388 AB 953 0389 E2 EA 954 038B
···955 038s E9 0130 R
957 038E .58
'5'
.b9b' I
...'···'6b···0··3'
9b7
."'97b''
97. 973 974 038E 975 038E 80 FC 04
976 0391 72 08 911 0393 80 FC 07
978 0396 74 03 979 0398 E9 058A R
980 039B
·'.·3·981 039B E8 0328 R ·9·8··
986 039E 987 039E F8 988 039F OA De 989 03A I 75 OF 990 03A3 FA 991 03A-4 EC 992 03A5 A8 08
993 03A7 75 09 994 03A9 A8 0 I 995 03A8 75 F 1 996 03AO
997 03AO EC 998 03AE 1.8 09 999 0380 74 FB
1000 0382 100 I 03B2 88 CIS 1002 0384 AA 1003 0385 47 1004 03B6 E2 E6 1005
1006 0388 E9 0130 R 1007
1008 0388
PAGE
i - - - - - - -- - - - - - - - - - -- - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - --- --
WR I TE AC CURRENT -THTs ROUTINE WRITES THE ATTRIBUTE AND CHARACTER
AT THE CURRENT CURSOR POSITION INPUT
(AHI = CURRENT CRT MOOE ISHI = DISPLAY PAGE
= I CX I z COUNT OF CHARACTERS TO WR I TE
(AL I CHAR TO WR lTE
(BL I · ATTR 18UTE OF CHAR TO WR ITE (OSI · DATA SEGMENT
I ES I = REGEN SEGMENT
OUTPUT
01 SPLAY REGEN SUFFER UPDATED
wR I TE AC CURRENT
PROC
- ChiP
AH.4
,JC
P30
CMP
AH,7
,JE
P30
,JMP
GRAPH I CS_WR I TE
PSO ~
CALL
FIND_POSITION
OR
BL.8L
,JZ
P3.
NEAR
I IS THIS GRAPHICS
1 IS THIS BW CARD
WRITE AC CONTINUE GET REGEN-LOCATION AND PORT ADORESS ADDRESS IN lOll REGISTER CHECK MODE FLAG FOR COLOR CARD AT 80 SKIP TO RETRACE WAIT IF COLOR AT 80
--XCHG
REP
AX,8P
STOSW SHORT P35
I GET THE ATTR/CHAR SAVED FOR FAST WRITE 1 STRING WRITE THE ATTRIBUTE' CHARACTER I EXIT FAST WRITE ROUTINE
WAIT FOR HORIZONTAL RETRACE OR VERTiCAL RETRACE IF COLOR 80
P31: P32:
P331 P341 P35:
XCHG
sri NOP
eLI IN TEST JNZ TEST .JNZ
IN TEST JZ
XCHG STOSW LOOP
BP,AX
AL,DX AL.RVRT P3. AL.RHRZ P3.
AL,DX AL,RVRT+RHRZ P33
AX.BP
P31
LOOP FOR EACH ATTRICHAR WRITE PLACE ATTRJCHAR BACK IN SAVE REGISTER
WI. I T FOR HORZ RETRACE LOW DR VERT I CAL ENABLE INTERRUPTS FIRST ALLOW FOR INTERRUPT WINDOW BLOCK I NTEARUP'TS FOR SINGLE LOOP GET STATUS FROh4 THE ADAPTER CHECK FOR VERT I CAL RETRACE FIRST DO FAST WRITE NOW IF VERTICAL RETRACE IS HOR [ZONTAL RETRACE LOW THEN 'AIT UNTIL IT IS
WAIT FOR EITHER RETRACE HIGH GET STATUS AGAIN IS HORIZONTAL OR VERTICAL RETRACE HIGH WAIT UNTIL EITHER IS ACTIVE
GET THE ATTR/CHAR SAVED IN (BPI WR I TE THE ATTR I BUTE AND CHARACTER AS MANY TIMES AS REQUESTED - TILL. CX"O
1 EXIT
; ---------- --------------------------------------------------------------------
: WRITE C CURRENT
-THIS ROUTINE WRITES THE CHARACTER AT
THE CURRENT CURSOR POSITION. ATTRIBUTE UNCHANGED
INPUT
I AH) · CURRENT CRT MODE
18H) · OISPLAY PAGE
ICX) · COUNT OF CHARACTERS TO WRITE
(ALI = CHAR TO WRITE (OSI = DATA SEGMENT
I ES I :: REGEN SEGMENT
I OUTPUT
- -- --- ;
;
-
-
----
0--I -S-PL-.-A-Y
--REGEN
-- - -
-BUF-F-E-R--U- P-D-A-T-E-D--------
------------
---
-----
--------
-
----
I
WR I TE C CURRENT PROC
- -CMf'
AH,4
NEAR
.JC
P40
CMP
AH,7
.JE
P40
.JMP
GRAPH I CS_WR ITE
P40:
CALL.
I IS nus GRAPHICS
I IS THIS BW CARD
GET REGEN LOCATION AND PORT ADDRESS
ADDRESS OF LOCATiON IN 1011
1----- WAIT FOR HORIZONTAL RETRACE OR VERTICAL RETRACE IF COLOR 50
P41 :
STI
OR
BL,BL
JNZ
P'3
eLI
IN
AL.DX
TEST
AL,RVRT
JNZ
P.3
TEST
AL,RHRZ
JNZ
P.,
P42 ~
IN
AL.DX
TEST
AL,RVRT+RHRZ
JZ
P42
P43:
MaY
AX,8P
STOSS
INe
01
--LOOP
P41 VIDEO_RETURN
WRITE_C_CURRENT ENDP
I WAI T FOR HORZ RETRACE LOW OR VERTI CAL I ENABLE INTERRUPTS FIRST i CHECK MOOE FLAG FOR COLOR CARD IN 80 I ELSE SKIP RETRACE WAIT - DO FAST WRITE I BLOCK INTERRUPTS FOR SINGLE LOOP I GET STATUS FROM THE ADAPTER I CHECK FOR VERT I CAL RETRACE FIRST I DO FAST WRITE NOW IF VERTICAL RETRACE I I S HOR I ZONT AL RETRACE LOW THEN I WAIT UNTIL IT IS I WAIT FOR EITHER RETRACE HIGH I GET STATUS AGAIN I I S HOR I ZONT AL OR VERT I CAL RETRACE HIGH I WAIT UNTIL EITHER RETRACE ACTIVE
GET THE CHARACTER SAVE IN (BPI
PUT THE CHARACTER I NTO REGEN SUFFER
BUMP POINTER PAST ATTRIBUTE
AS MANY TIMES AS REQUESTED
5-70 VIDEO (01/10/86)
ISM Pllrsonal ComplJt.II" MACRO Assllmblllr V.,.sion 2.00 VIDEO ---- 01/10/86 VIDEO DISPLAY 810S
1-10 01-10-86
1009
1010 1011 1012
1013 101-4
1015 1016 1011 1018 1019 1020 1021 1022
1023 1024 0388
1025 03SS 55 1026 038C 88 EC
1027 038E 8E 46 10 1028 03el 50 1029 03C2 98 1030 03e3 88 Fa
103 I 03C5 3C 0-4 1032 03C7 73 73 1033
1034 03C9 E3 71 1035 1036 03CB 88 F3 1037 03CO 8A OF 1038 03CF 32 FF 1039 0301 81 F3
1040 0303 Dl E6 1041 0305 FF B4 0050 R 1042 0309 B8 0200 1043 03DC CD 10
104-4 03DE 1045 030E 26: 8A 46 00 1046 03£2 45 1047 1048
1049 1050 03E3 3C 08 1051 03E5 14 OC 1052 03E1 3C 00
1053 03£9 74 08 1054 03EB 3C OA 1055 03EO 74 04 1056 03EF 3C 01 1051 03FI 15 OA 1058 03F3 1059 03F3 B4 OE 1060 03FS CD 10 1061 03Fl 8B 94 0050 R
1062 03FB EB 20 1063 1064 03F'0 1065 03FO 51
1066 03FE 53 1061 03FF 89 0001
1068 0402 83 FF 02 1069 0405 72 05 1070 0401 261 8A 5E 00
1011 040B 45 1012 040C
1013 040C 84 09 1014 040E CD 10 1015 0410 SS 1016 0411 59 1011 0412 FE Co2 1018 0414 3A 16 004A R 1019 0418 12 10 1080 041A FE C6 1081 041C 2A 02
1082 041E 80 FE 19 1083 0421 72 01 1084 1085 0423 B8 OEOA
1086 0426 CD 10 1081 0428 FE CE 1088 042A 1089 042A 88 0200 1090 0420 CD 10 1091 042F E2 AD 1092 1093 0431 SA 1094 0432 91 10950433 A8 01 1096 0435 15 05 1091 0431 B8 0200 1098 043A CD 10 1099 043C
1100 043C E9 0130 R 1101 1102 0-43F
PAGE
1-- - - - - - - - - - - - - - - ---- - - - - - - - - -- - - - - --- - - - - - - - - - - - --- - ------------------- - ---- - -
I WRITE STRING
·
;
-THIS ROUTINE IRITES A STRING OF CHARACTERS TO THE CRT.
I INPUT
;
(AL) '" WRITE STRING COMMAND 0 - 3
;
IBH) '" DISPLAY PAGE (ACTIVE PAGE)
ICX) = COUNT OF CHARACTERS TO WRITE, IF ICX) · 0 THEN RETURN
lOX) '" CURSOR POSITION FOR START OF STRING IRITE
IBLI '" ATTRIBUTE OF CHARACTER TO WRITE IF (ALI II 0 OR !ALI '" I
I
= (BP) '" SOURCE STR I NG OFFSET
10E] SOURCE STRING SEGMENT (FOR USE IN (ES) IN STACK +141
; OUTPUT
; ~;;
NONE ;~-;;~; ~~-
---;R~~
----~~~~
------------------------
----
--
-----
------
----------
- PUSH MOV MOV
POP CBW MaV CMP JNB
SP BP,SP ES,18P]+ 14+2 BP
OI,AX AL,04 P59
SAVE SUFFER OFFSET IBP} IN STACK GET POINTER TO STACKED REGISTERS RECOVER ENTRY (ES) SEGMENT REGiSTER
RESTORE BUFFER OFFSET CLEAR (AHI REGISTER SAVE (AL) COMMAND IN (01 I REGISTER TEST FOR INVALID WRITE STRING OPTION IF OPTION INVALID THEN RETURN
JCXZ
P5'
I 1F ZERO LENGTH STR I Ne.. THEN RETURN
P50 ; 1-----
MOY MOY XOR XCHG
SAL PUSH MOY
INT
SI,BX
SAVE CURRENT CURSOR PAGE
SL,BH
WOVE PAGE TO LOW BYTE
BH,BH
sl,ax
CLEAR HIGH BYTE
I MOVE OFFSET AND RESTORE PAGE REG I STER
SI,I
I CONVERT TO PAGE OFFSET (S I II PAGEl
(SI+OFFSET .CURSOR_POSN], SA VE CURRENT CURSOR POS I T I ON IN ST ACK
AX,0200H
I SET NEW CURSOR pas I T I ON
10H
MOY INC
AL,ES.IBP] 8P
GET CHARACTER FROM INPUT STRING BUMP PO I NTER TO CHARACTER
TEST FOR SPECIAL CHARACTER'S
PSII P521 P531
P541 P591
eMP JE eMP JE COP ..£ COP JNE
MOY INT MOV ,,"P
PUSH PUSH MOY eMP J8 MOY INC
MOY INT POP POP INC eMP J8 INC
sua
e"p J8
MOY INT DEC
"OY INT LOOP
POP xeHO TEST JNZ MOY INT
JMP
AL,08H PSI
AL,CR PSI
AL,LF PSI AL,OlH P52
I SIT A BACKSPACE BACK SPACE
IS IT CARRIAGE RETURN
I CAR RET I IS TT A LINE FEED I LINE FEED I I S IT A BELL I I F NOT THEN DO WR I TE CHARACTER
AH,OEH
I TTY CHAIRACTER WRITE
10H
.-IRITE TTY CHARACTER TO THE CRT
ox, [SJ+OFFSET .CUIRSOR_POSN] · GET CURRENT CURSOR POSITION
SHORT P5-4
f SET CURSOR pas I T I ON AND CONT I NUE
ex 8X CX,I 01,2 P53 SL.ESIIBP] 8P
AH.09H 10H 8X ex OL OL,BYTE PTR .CRT_COLS P54 OH DL.DL DH,25 P5.
AX,OEOAH 10H OH
AX,0200H 10H P50
ox
AX,DJ AL,OIH PS. AX,0200H 10H
VIDEO_RETURN
I SET CHARACTER IR I TE AMOUNT TO ONE I IS THE ATTRIBUTE IN THE STRING I IF NOT THEN SKIP I ELSE GET NEW ATTR I SUTE I BUMP STRING POINTER
I GOT CHARACTER I IR ITE CHARACTER TO THE CRT I RESTORE REGI STERS
I NCREMENT COLUMN COUNTER IF COLS ARE WITHIN RANGE FOR THIS MODE
THEN GO TO COLUMNS SET SUMP ROW COUNTER BY ONE SET COLUMN COUNTER TO ZERO I F ROWS ARE LESS THAN 25 THEN
GO TO ROWS_COLUMNS_SET
ELSE SCROLL SCREEN ONE L I lIE RESET ROI COUNTER TO 24
I ROW COLUMNS SET I SET NEW CURS~ POSITION COMIiIAND · ESTABLISH NEI CURSOR POSITION I DO I T ONCE MORE UNTI L (CX) II ZERO
I RESTORE OLD CURSOR COORDINATES I RECOVER WR I TE STR I NG COMMAND I I F CURSOR lAS NOT TO BE MOVEO THEN I THEN EXIT IITHOUT RESETTING OLD VALUE I ELSE RESTORE OLD CURSOR POSITION
I DONE - EXIT WRITE STRING I RETURN TO CALLER
WRITE_STRING
ENOP
VIDEO (01/10/86) 5-71
IBM P.rsonal Comput.r MACRO Assembl.r V.rsion 2.00 VIDEO ---- 01/10/8b VIDEO DISPLAY BIOS
I-II 01-10-86
1103 1104 I 105 1106 1101 ,108
1109 1110 IIII 1112 1113 1114 1 I 15 1I Ib 1111 1118
1119 I 120 1121 043F 1 122 043F E6 0413 R I 123 0442 26; 8A 04 I 124 0445 22 e4
I 125 0441 02 EO 126 0449 8,-, CE 121 0448 02 CO 128 0440 E9 0130 R
,.0129 0450
131 0450
132 0450 50
133 0451 50 134 0452 E8 0413 R
135 0455 02 E8 136 0451 22 C4 131 0459 26: 8A oe
138 045e 58 1]9 0450 F6 C3 80 140 0460 15 00 141 0462 F6 04 142 0464 22 ce
143 0466 OA el
144 0468
145 0468 26: 88 04 146 046B 58 141 046e E9 0130 R
148 046F 149 046F 32 C I 150 0411 E8 F5 151 0473 152 IS. 15' 155 15. 157 IS.
,1,..50,9 III ·..·''
165 0413 1166 1167
1168 1169 1110047396
1 11' 1 0474 80 28 11720416 F6 E2 T 1730418 '-'8 08
174 041A 74 03
115 047C 05 IFoe 176 047F 177 041F 96 178 0480 8B 01 179
···.BO
I''''B"""B5.
IB7
1 188 0482 BB 02eo I 189 0485 89 0302 1190 0488 80 3E 0049 R 06 1191048072 06 1192 048F B8 0180 1193 0492 89 0703 1194 I 195 1196 0495 1197 0495 22 EA 1198 1199 1200 1201 0491 03 Ell. 1202 0499 03 F2 1203 049B 811. F7 1204
1205 120b 1207 0490 2A C9 1208 049F
1209 049F DO ca 1210 04Al 02 CD
121' 04A3 FE CF 1212 04A5 15 Fe 1213 04'-'1 8A E3 1214 04A9 02 EC 1215 04A8 C3 1216 04AC
PAGE
READ DDT -- WRITE DDT
THESE ROUT I NES WILL WR I TE A DOT. OR READ THE
~OT AT THE INDICATED LOCATION
ENTRY -
OX = ROW {O-1 99)
(THE ACTUAL VALUE DEPENDS ON THE MODE)
CX :: COLUMN ( 0-639) ( THE VALUES ARE NOT RANGE CHECKED )
AL = DOT VALUE TO WRITE f I ,2 OR 4 81TS DEPENDING ON MODE,
REQUIRED FOR WRITE DOT ONLY. RIGHT JUSTIFIED)
= BIT 1 OF AL
I INO[CATES XOR THE VALUE INTO THE LOCATION
OS ::: DATA SEGMENT
ES = REGEN SEGMENT
EXIT AL :: DOT VALUE READ, RIGHT ,JUSTIFIED, READ ONLY
ASSUME READ ~OT
-
CALL
.OV
AND
SHL
.Ov
ROL
O.P
READ_DOT
OS =DATA. ES: DATA
PROC
NEAR
R3
AL,ES:[SI)
AL.AH
AL.CL
CL,DH
AL,eL
VIDEO RETURN
ENDP
DETERMi NE BYTE POS IT I ON OF DOT GET THE BYTE MASK OFf THE OTHER BITS I N THE BYTE LEFT ,JUSTIFy THE VALUE GET NUMBER OF 8[TS IN RESULT I RIGHT ,JUSTIFY THE RESULT I RETURN FROM V IOEO 110
WRITE DOT - PUSH PUSH CALL SHR AND .OV POP TEST oNZ NOT AND
PROC
NEAR
AX
RAX'
AL.CL
AL,AH
CL,ES:{SIJ
BX
R'BL.80H
AH
CL,AH
I SAVE DOT VALUE ; TWICE I DETERMINE BYTE POSITION OF THE DOT I SHIFT TO SET UP THE BITS FOR OUTPUT I STR I P OfF THE OTHER 8 [TS I GET THE CURRENT BYTE I RECOVER XOR FLAG I IS IT ON I YES. eXOR THE DOT
I SET MASK TO REMOVE THE INDICATED BITS
OR
AL.CL
RI.
.Ov
ES:{SiJ.AL
POP
AX
OR IN THE NEW VALUE OF THOSE BITS FINISH DOT
RESTORE THE 8YTE IN MEMORY
R2:
oMP
V[DEO_RETURN
I RETURN FROM VIDEO 110 I XOR DOT
XOR JMP
WR I TE_DOT
AL,CL Rl
ENOP
I EXCCUS [VE OR THE DOTS ; FINISH UP THE WRITING
; -~~~~-~~~~;~~ ~ ~E-~ETER~ 7~E~ - T~E-RE~~~-~~T~-~O~AT I ON OF THE
I IND)CATED ROW COLUMN VALUE IN GRAPHICS MODE.
i ENTRY -
I OX = ROW VALUE (0-199)
= I cx COLUMN VALUE (0-6]9]
= ; EXIT -
I S I OFFSET I NTO REGEN BUFFER FOR BYTE OF 1NTEREST
I AH. MASK TO STR I P OFF THE 81 TS OF INTEREST
1 CL =- BITS TO SHIFT TO RIGHT JUSTIFY THE MASK IN AH , DH = ." BITS IN RESULT
1I --B-X--::-: -M--O-D-I-F-IE-D--- --- ------ ------ -- ------------
R3
PROC
NEAR
DETERMINE 1ST BYTE IN INDICATED ROW BY MULTIPLY[NG ROW VAlUE 8Y 40 ( LOW BIT OF ROW DETERMINES EVEN/ODD. 80 BYTES/ROW)
XCHG
SI,AX
.OV
AL.40
MUL
OL
TEST "l
R.AL. a08H
ADO
AX.2000H-40
R4;
XCHG
SI,AX
.OV
DX.CX
I W[LL SAVE AL AND AH DURING OPERATION
AX:: ADDRESS OF START OF INDICATED ROW TEST FOR EVEN/ODD ROW CALCULATED I ,JUMP I F EVEN ROW I OFFSET TO LOCATION OF ODD ROWS AD,JUST I EVEN ROW I MOVE-PO I NTER TO (5 II AND RECOVER 'AX) I COLUMN VALUE TO OX
DETERM I NE GRAPH I es MODE CURRENTLY [N EFFECT
I SET UP THE REGISTERS ACCORDING TO THE MODE
i CH :: MASK FOR LOW OF COLUMN ADDRESS I 113 FOR HIGH/MED RES)
; CL · , OF ADDRESS BITS IN COLUMN VALUE ( 3/2 FOR HIM I
= BL MASK TO SELECT BITS FROM POINTED BYTE f 60H/COH FOR HIM)
BH = NUMBER OF VALID B[TS [N POINTED BYTE I 1/2 FOR HIM)
MOV
.Ov C.P
"C
.OV
MOV
BX,2COH CX,302H ~~RT_MODE,6
BX,I80H CX .103H
I SET PARMS FOR MED RES HANDLE IF MEO RES
I SET PARMS FOR HIGH RES
DETERMINE B[T OFFSET IN BYTE FROto4 COLUMN MASK
AND
CH,DL
I ADDRESS OF PEL WITHIN 8YTE TO CH
;----- DETERMINE BYTE OFFSET FOR THIS LOCATION IN COLUMN
SHe ADO .OV
DX.CL
SI.OX DH,BH
I SHIFT BY CORRECT AMOUNT I INCREMENT THE POINTER I GET THE. OF BITS IN RESULT TO DH
MULTIPLY 8H (VALID BITS IN BYTEI BY CH IBIT OFFSET)
R6:
SUB
CL.CL
ROR
AL,I
ADO
CL.CH
DEC "NZ
BRH.
MOV
AH,BL
R,
SHe RET
ENOP
AH,CL
I ZERO INTO STORAGE LOCATION
LEFT JUSTIFY VALUE IN AL IFOR WRITE) ADD I N THE B IT OFFSET VALUE LOOP CONTROL ON EXIT, CL HAS COUNT TO RESTORE BITS ; GET MASK TO AH I MOVE THE MASK TO CORRECT LOCATION I RETURN WITH EVERYTHINC SET UP
5-72 VIDEO (01/10/86)
IBM Personel COfllput.er MACRO A.se...bler Version 2.00 VIDEO ---- 01/10/86 VIDEO DISPLAY 810S
1-12 01-10-86
1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 04AC 1232 04AC 8A 08 1233 04AE 88 C 1
1234 1235 1236 1237 1238 0480 E8 06EC R 1239 0483 88 F8 1240 1241 1242 1243 0485 2801 12440487 81 C2 0101 1245 0488 DO E6 1246 0480 DO E6 1247 1248 1249 1250 048F 80 3E 0049 R 06 1251 04C4 73 04 1252 1253 1254 04C6 DO E2 1255 04C8 01 E7 1256 1257 1258 04CA 1259 04CA 06 1260 04C8 IF 1261 04CC 2A ED 1262 04CE DO E3 1263 0400 DO E3 1264 0402 74 28 1265 0404 80 50 1266 0406 F6 E3 1267 0408 88 F7 1268 04DA 03 FO 1269 04DC 8A E6 1270 04DE 2A E3 1271 1272 1273 04EO 1274 04EO E8 0560 R 1275 04E3 81 EE IF80 1276 04E7 81 EF IF80 1277 04E8 FE CC 1278 04ED 75 Fl 1279 1280 1281 04EF
1282 04EF 8A C7 1283 04FI 1284 04F 1 E8 0579 R 1285 04F4 81 EF IF80 1286 04F8 FE C8 1287 04FA 75 F5 1288 04FC E9 0130 R 1289 1290 04FF 1291 04FF 8A DE
1292 050 I E8 EC 1293 0503
1294 1295 1296 1297 1298 1299 1300
1301 1302 1303 1304 1305 1306 1307 1308 1309 0503 1310 0503 FD 131 I 0504 8A 08 1312 0506 88 C2 1313 1314
1315 1316 1317 0508 E8 06EC R 1318 0508 88 Fe 1319 1320 1321 1322 0500 28 01 1323 050F 81 C2 0101 13240513 DO E6 13250515 DO E6 1326 1327 1328 1329051780 3E 0049 R 06 1330 051C 73 05
SCROLL UP
THIS ROUTINE SCROLLS UP THE INFORMATION ON THE CRT ENTRY -
CH I CL = UPPER LEFT CORNER OF REG I ON TO SCROLL DH,DL = LOWER RIGHT CORNER OF REG I ON TO SCROLL
80TH OF THE A80VE ARE I N CHARACTER POS I T IONS 8H = FILL VALUE FOR 8LANKED LINES
AL = , LINES TO SCROLL ,AL=O MEANS BLANK THE ENTIRE FIELD) OS = DATA SEGMENT
ES = REGEN SEGMENT EXIT -
1 NOTH I NG, THE SCREEN I S SCROLLED
1- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --
GRAPH I CS UP
PROC
NEAR
MOV MOV
BL,AL AX ,CX
1 SAVE LINE COUNT IN BL I GET UPPER LEFT POS IT I ON
I NTD AX
REG
USE CHARACTER SU8ROUTINE FOR POSITIONING ADDRESS RETURNED IS MULTIPLIED BY 2 FROM CORRECT VALUE
CALL MOV
GRAPH POSN DI,AX-
I SAVE RESULT AS DESTINATION ADDRESS
DETERM I NE SIZE OF WINDOW
SUB AOO SAL SAL
DX,CX DX,IOIH DH,I DH,I
AD,JUST VALUES MULTIPLY ROWS BY 4 AT 8 VERT DOTS/CHAR
AND EVEN / ODD ROWS
DETERM I NE CRT MODE
CMP oNC
:~RT_MODE, 6
TEST FOR MED I UM RES FIND_SOURCE
1-----
MEOIUM RES UP
SAL
DL,I
SAL
01,1
, COLUMNS - 2, SINCE 2 BYTES/CHAR OFFSET -2 SINCE 2 BYTES/CHAR
1----R7:
DETERMINE THE SOURCE ADDRESS
PUSH POP
SU8 SAL SAL ,JZ MOV MUL MOV AOO
MOV SUB
ES OS
CH I CH BL, I 8L,I
Rll AL,80 BL S I ,0 I SI,AX
AH, DH AH,BL
IN THE BUFFER FIND SOURCE GET SEGMENTS BOTH PO I NT I NG TO REGEN
ZERO TO HIGH OF COUNT REG I STER MUL TI PL Y NUMBER OF LINES 8Y 4
IF ZERO, THEN BLANK ENTIRE FIELD 80 BYTES/ROW DETERMINE OFFSET TO SOURCE SET UP SOURCE
ADD IN OFFSET TO IT NUMBER OF ROWS IN FIELD DETERMINE NUMBER TO MOVE
,-----
M,
LOOP THROUGH, MOVING ONE ROW AT A TIME, 80TH EVEN AND ODD FIELDS I_~~
CALL
R' 7
I MOVE' ONE ROW
SUB
S I ,2000H-80
I MOVE TO NEXT ROW
SUB
DI , 2000H-80
DEC
AH
NUM8ER OF ROWS TO MOVE
,JNZ
R8
CONTI NUE TI LL ALL MOVED
RIO:
FILL IN THE VACATED LINEIS)
MOV
AL,BH
CALL SUB OEC oNZ oMP
RI,
DI,2000H-80
BL ROO V IDEO_RETURN
CLEAR ENTRY ATTRIBUTE TO FILL WITH
CLEAR THA TROW POINT TO NEXT LINE NUM8ER OF LINES TO FILL CLEAR LOOP EVER YTH I NG DONE
RII:
BLANK FIELD
MOV ,JMP
BL,DH R9
SET BLANK COUNT TO EVERYTHING CLEAR THE FIELD
GRAPH I CS UP
ENDP
1- - - - - - - ':'- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
; SCROLL DOWN
THIS ROUTINE SCROLLS DOWN THE INFORMATION ON THE CRT
ENTRY -
CH, CL = UPPER LEFT CORNER OF REG I ON TO SCROLL
DH,DL : LOWER RIGHT CORNER OF REG I ON TO SCROLL
BOTH OF THE ABOVE ARE I N CHARACTER POS I T IONS
BH : FILL VALUE FOR BLANKED LINES
AL " , LINES TO SCROLL ,AL:O MEANS BLANK THE ENTIRE FIELD)
OS : DATA SEGMENT
ES = REGEN SEGMENT
EXIT -
;
-
-
NOTH
----
I
-
N--G-, -T-H-E-
-
-SC-R-E-E-N---I -S--SC--R-O-L-LE-D----
-
-
--
--
-
--
-
-
-
-
-
-
-
-
--
IN FIELD
GRAPH I CS DOWN
'TO MOV MOV
PROC
BL,AL AX,DX
NEAR
I SET DIRECTION I SAVE LINE COUNT IN BL I GET LOWER RIGHT POSITION INTO AX REG
;----- USE CHARACTER SUBROUTINE FOR POSITIONING ;----- ADORESS RETURNED IS MULTIPLIED BY 2 FROM CORRECT VALUE
CALL MOV
GRAPH POSN DI,AX-
I SAVE RESULT AS DESTINATION ADDRESS
;----- DETERMINE SIZE OF WINDOW
SUB AOO SAL
SAL
DX,CX DX,IOIH
DH,I DH, ,
AD,JUST VALUES MULTIPLY ROWS BY 4 AT 8 VERT DOTS/CHAR
AND EVEN/ODD ROWS
DETERM I NE CRT MODE
CMP oNC
OCRT MODE,6 RI2 -
TEST FOR MED I UM RES F IND_SOURCE_DOWN
VIDEO (01/10/86) 5-73
IBM Personal COrllput..r MACRO AlI:terllbler Verelan 2.00 VIDEO ---- 01/10/66 VIDEO DISPLAY BIOS
1-13 01-10-86
1331
1332 1333 051E DO E2
1334 0520 Dl E1 1335 0522 41 133&
1331 1336 0523 1339 0523 06 1340 0524 IF 1341 0525 2A ED
1342 0527 81 C1 OOFO 1343 052B 00 E3 1344 0520 DO E3 1345 052F 14 2B 1346 0531 80 50
1347 0533 F6 E3 1348 0535 88 F7 1349 0531 2B FO
1350 0539 8A E6 1351 053B 2A E3 1352 1353 1354 053D 1355 053D E6 0560 R 1356 0540 81 EE 2050 1357 0544 81 EF 2050 1358 0548 FE CC 1359 054A 15 FI
1360 1361 1362 054C 13&3 054C 6A Cl 1364 054E 13&5 054E E8 0519 R
1366 0551 81 EF 2050 1361 0555 FE CB 1368 0551 15 F5 1369
1310 0559 E9 0130 R 1311 1312 055C 1373 055C 8A DE 1314 055E EB EC 1315 0560 131& 1311
1318 1319 0560
1380 0560 8A CA 1381 0562 5& 1382 0563 51 1383 0564 F31 A4 1384 0566 5F 1365 0561 5E
1386 0568 81 C6 2000 1381 056C 81 C1 2000 1388 0510 56
13890571 51 1390 0512 8A CA 1391 0514 F3J A4 1392 0516 5F 1393 0511 5E
1394 0516 C3 1395 0519 139& 1397
1398 1399 0519
1400 0519 8A CA 1401 057B 51 1402 051C F31 AA 1403 051E SF
1404 057F 81 Cl 2000 1405 0583 51 1406 0584 8A CA 1407 0586 F3! AA 1408 0588 SF 1409 0589 C3 1410 058A 1411 1412 1413
1414
1415 1416 1411 1418
1419 1420
1421 1422 1423 1424
1425 1426 1427 1428 1429
1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 OS8A
1443 058A B4 00 1444 05SC 50
MEO I UM RES DOWN
SAL
OL.l
SAL
01,1
INC
01
; , COLUMNS - 2, SINCE 2 BYTES/CHAR I DFFSET -2 SINCE 2 BYTES/CHAR I POINT TO lAST BHE
OETERM I NE THE SOURCE ADDRESS
PUSH POP
sua
ADD SAL SAL
JZ MOV MUL MOV
SUB MOV SUB
ES OS
CH,CH DI,240 Bl,l Bl,l RI. Al.60 BL S 1,01
S I .AX AH,OH AH,BL
I N THE BUFFER F I NO SOURCE DOWN 80H-l-SEGMENTS TO REGEN
ZERO TO HIGH OF COUNT REG I STER POINT TO lAST ROW OF PIXELS MULTIPLY NUMBER OF LINES BY 4
I F ZERO, THEN BLANK ENT I RE FIELD 80 BYTES/ROI DETERMINE OFFSET TO SOURCE ; SET UP SOURCE I SUBTRACT THE OFFSET I NUt.4BER OF ROWS IN FIELD I OETERM I NE NUMBER TO t.40VE
lOOP THROUGH, MOVING ONE ROW AT A TIME, BOTH EVEN AND ODD FIELDS
CAll
sua
SUB
RI7 S I ,2000H+80
DT ,20eOH+80
I ROW lOOP DOWN I MOVE ONE-ROW
I t.40VE TO NEXT ROW
DEC
AH
JNZ
RIl
NUt.4BER OF ROWS TO MOVE CONT I NUE Till All MOVED
~~~~--
RIS;
Fill IN THE VACATED L1NE(S)
MOV
Al,BI-I
CAll SUB DEC JNZ
RI' 01 ,20001-1+80
BL RIS
; CLEAR ENTRY DOWN
I ATTRIBUTE TO FILL WITH I CLEAR lOOP DOWN I ClEAR-A Roi
I POINT TO NEXT LINE I NUMBER OF lINES TO F i l l I CLEAR_LOOP_DOWN
JMP
V rOED_RETURN
I EVERYTH I NG DONE
R16: MOV -",P
- GRAPI-IICS DOWN
BL,OH
RI' ENDP
BLANK FIELD DOWN SET BLANK COUNT TO EVERYTHING IN FIELD CLEAR THE FIELD
ROUT I NE TO MOVE ONE ROW OF I NFORNAT I ON
RI7 R I J
PROC MOV
PUSH PUSH REP POP
POP ADO AOO PUSH PUSH MOV
REP POP POP RET ENOP
NEAR Cl.Ol 51 01 MOVSB 01 51 SI,2eDOH 0l,2000H 51 01 CL.Dl MOVSe
01 51
I NUMBER OF BYTES I N THE ROW SAVE POINTERS MOVE THE EVEN FIELD
I POINT TO THE ODD FIELD
I SAVE THE POINTERS I COUNT BACK I MOVE THE ODD FIELD
I PO I NTERS BACK I RETURN TO CALLER
CLEAR A SINGLE ROW
RI.
PROC
NEAR
MOV PUSH REP
Cl,Dl 01 STOS8
; NUt.4BER OF BYTES IN FIELD I SAVE POINTER I STORE THE NEW VALUE
PDP AOO
PUSH MOV
01 0l,2000H
01 Cl,Ol
I PO I NTER BACK I POINT TO 000 FIELD
REP
STOSB
I FILL THE ODD FIELD
PDP
01
RET
---- - RI.
ENOP
; ------------ -
- - -----
I RETURN TO CALLER
; GRAPHICS WRITE
· TH I S ROUT I NE WR I TES THE ASC I I CHARACTER TO THE CURRENT
I POS I T I ON ON THE SCREEN.
; ENTRY -
= ; Al CHARACTER TO WR I TE
, Bl = COLOR ATTRIBUTE TO BE USED FOR FOREGROUND COLOR
IF BIT 1 IS SET, THE CHAR IS XOR'D INTO THE REGEN BUFFER
(0 IS USED FOR THE BACKGROUND COLOR]
CX " NUMBER OF CHARS TO WR I TE
= OS OAT A SEGMENT = ES REGEN SEGMENT
EXIT -
NOTH I NG I S RETURNED
GRAPH I CS READ
TH I S ROUT INE READS THE ASC II CHARACTER AT THE CURRENT CURSOR
POS I T I ON ON THE SCREEN BY MATCH I NG THE DOTS ON THE SCREEN TO THE
CHARACTER GENERATOR CODE POINTS
ENTRY -
NONE (0 IS ASSUMED AS
, EXIT - Al " CHARACTER READ AT
THE BACKGROUND COLOR) THAT POSITION (0 RETURNED
IF NONE
FOUND)
I FOR BOTH ROUTiNES. THE IMAGES USED TO FORM CHARS ARE CONTAINEO IN ROM
; FOR THE 1ST '28 CHARS. TO ACCESS CHARS I N THE SECOND HALF. THE USER
; t.4UST INITIALIZE THE VECTOR AT INTERRUPT IFH (LOCATION 0001CH) TO
; POINT TO THE USER SUPPLIED TA8lE OF GRAPHIC IMAGES t8XS BOXES).
; ;
-
-
F--A-il-U-R-E---T-O--D-O
-S-O--W --i-lL---C-A-U-S-E--I-N--S-TR-A-N-G-E--R--E-S-U-L-T-S----
ASSUME DSIOATA,ESIOATA
GRAPH I CS WR J TE PROC
NEAR
MOV PUSH
"H,e AX
; ZERO TO HIGH OF CODE POINT I SAVE CODE POINT VALUE
5-74 VIDEO (01/10/86)
IBM Personal COlllputer MACRO Asselllbler Vers,on 2.00 VIDEO ---- 01/10/56 VIDEO DISPLAY 8105
1-14 ai-la-56
1445 1446 1447 1448 0580 E5 06E9 R 1449 0590 58 F5 1450 1451 1452 1453 0592 58 1454 0593 3C 80 1455 0595 73 06 1456 1457 1458
1459 0597 8E 0000 E 1460 059A OE 1461 0598 EB 15 1462 1463
1464 1465 0590 1466 0590 2C 50 1467 059F IE 1465 05AO 28 F6 1469 05A2 5E DE 1470 1471 05A4 C5 36 007C R 1472 05A8 8C OA 1473 1474 05AA IF 1475 05A8 52 1476 05AC 08 06 1477 05AE 75 05
1478 1479 0580 58 1480 0581 8E 0000 E 1451 0584 OE 1482 1453 1454 1485 0585 1486 05B5 OlEO 1457 05B7 0 I EO 1455 0589 D 1 EO 1459 05BB 03 FO 1490 05BO 80 3E 0049 R 06 1491 05C2 IF 1492 05C3 72 2C 1493 1494
1495 05C5 1496 05C5 57 1497 05C6 56 1498 05C7 B6 04 1499 05C9
1500 05C9 AC 1501 05CA F6 C3 50 1502 05CD 75 16
1503 05CF AA 1504 0500 AC 1505 0501
15060501 26: 8855 1507 0506 53 C7 4F 1508 0509 FE CE 1509 0508 75 EC
1510 0500 5E 151 I 050E 5F 1512 050F 47
1513 05EO E2 E3 1514 05E2 E9 0130 R 1515 1516 05E5 1517 05E5 26: 3205 1515 05E5 AA 1519 05E9 AC
1520 05EA 26: 32 85 I FFF 1521 05EF EB EO 1522
1523 1524 05Fl
1525 05Fl 8A 03 1526 05F3 01 E7 1527
1528 05F5 80 E3 03 1529 05F5 BO 55 1530 05FA F6 E3
1531 05FC 8A 08 1532 05FE 5A F5 1533 0600 1534 0600 57 1535 0601 56 1536 0602 B6 04 1537 0604 1538 0604 AC 1539 0605 E5 06CO R 1540 0605 23 C3
1541 060A 86 EO 1542 060C F6 C2 80 1543 060F 74 03 1544 0611 26: 33 05 1545 0614 15460614 26: 8905 1547 0617 AC 15480618 E8 06CO R
1549 061B 23 C3 1550 0610 86 EO 1551 061F F6 C2 80 1552 0622 74 05 1553 0624 26; 33 55 2000 1554 0629 1555 0629 26; 59 85 2000 1556 062E 83 C7 50 1557 0631 FE CE 1555 0633 75 CF
51;
52:
54:
55:
56: 57: 58: 59: 510: 511:
DE TERM I NE POS I T ION I N REGEN BUFFER TO PUT CODE PO I NTS
CALL MOV
526 DI,AX
I F I NO LOCA T I ON I N REGEN BUFFER I REGEN POINTER IN 01
DETERMINE REGION TO GET CODE POINTS FROM
POP eMP oAE
IMAGE
AX AL,50H
"
[5 IN FIRST
HALF,
I I I
CONTAINED
RECOVER CODE PO I NT IS IT IN SECOND HALF YES
IN ROM
MOV PUSH
JMP
S I .OFFSET CRT CHAR GEN
CS
-
-
SHORT 52
I OFFSET OF IMAGES I SAVE SEGMENT ON STACK
I DETERMINE_MODE
I MAGE I SIN SECOND HALF, I N USER MEMORY
SUB PUSH SUB MOV ASSUME LOS MOV ASSUME POP PUSH
OR oNZ
AL,50H OS SI,SI 05,51 OS:ABSO SI,CtEXT PTR OX,OS OS:DATA OS OX OX,SI
52
EXTEND CHAR ZERO OR I GIN FOR SECOND HALF SAVE DATA POINTER
I ESTABL I SH VECTOR ADDRESS I NG
GET THE OFFSET OF THE TABLE GET THE SEGMENT OF THE T A8LE
RECOVER DATA SEGMENT SAVE TA8LE SEGMENT ON STACK CHECK FOR VALID TABLE DEFINED CONTINUE IF OSISI NOT 000010000
POP MOV PUSH
AX
51 ,on"SET CRT CHAR GEN
CS
-
ELSE SET lAX)", 0000 FOR "NULL" POINT TO DEFAULT TABLE OFFSET
I N THE CODE SEGMENT
DETERMINE GRAPHICS MODE IN OPERATION
SAL SAL SAL ADO eMP POP oe
AX,I AX,I AX, I SI,AX CtCRT MODE,6 OS -
51
OETERM I NE MODE
e MULTIPLY CODE POINT VALUE BY
I S I HAS OFFSET OF DES I RED CODES RECOVER TABLE PO [NTER SEGMENT TEST FOR MEDIUM RESOLUTION M,ODE
HIGH RESOLUT I ON MODE
PUSH PUSH MOV
01 5 I OH.4
HIGH CHAR SAVE-REGEN PO INTER
SAVE CODE POINTER NUMBER OF TIMES THROUGH LOOP
LOOS8 TEST JNZ STOS8 LOOSB
BL.80H 56
GET 8YTE FROM CODE PO I NTS
SHOULD WE USE THE FUNCT I ON
TO PUT CHAR IN
STORE IN REGEN 8UFFER
MOV ADD DEC JNZ POP POP INC LOOP JMP
ES:(DJ+2000H-IJ,AL 01,79 DH 54 5 I 01 01 53 VIDEO_RETURN
STORE I N SECOND HALF
MOVE TO NEXT ROW I N REGEN
DONE WITH LOOP
RECOVER REGEN PO INTER POINT TO NEXT CHAR POSITION MORE CHARS TO WR I TE
XOR STOSB LODS8 XOR JMP
AL,ES: 101)
AL,ES: [OI+2000H-I) S5
MEO [UM RESOLUT I ON WR I TE
MOV SAL
OL,BL 01, I
AND MOV MUL MOV MOV
8L,3 AL,055H BL 8L,AL BH,AL
PUSH PUSH MOV
01
"OH,4
LODSB CALL AND
XCHG TEST OZ XOR
AX,8X AH,AL DL,50H
sro
AX,ESl[DI1
NOV LODSB CALL AND XCHG TEST OZ XOR
ES:[011,AX
521 AX,BX AH,AL OL ,50H 511 AX, ES: [0 I +2000H)
NOV ADD DEC oNZ
ES1[01+2000H),AX 01,50 OH 59
EXCLUS I VE OR WITH CURRENT STORE THE CODE PO I NT AGAIN FOR 000 FIELD
I BACK TO MA I NSTREAM
MED RES WR I TE SAVE-HIGH COLOR BIT OFFSEP2 SINCE 2 BYTES/CHAR EXPAND BL TO FULL WORD OF COLOR ISOLATE THE COLOR BITS ( LOW 2 BITS) GET BIT CONVERSION MULTiPLIER EXPAND 2 COLOR BITS TO 4 REPLICATIONS PLACE BACK I N WORK REG I STER EXPAND TO 5 REPLICATIONS OF COLOR BITS
MED CHAR SAVE-REGEN POINTER SAVE THE CODE POINTER NUMBER OF LOOPS
GET CODE PO I NT DOUBLE UP ALL THE B[TS
CONVERT TO FOREGROUND COLOR ( 0 BACK I SWAP HIGH/LOW BYTES FOR WORD MOVE IS THIS XOR FUNCTION NO, STORE IT IN AS IT IS DO FUNCTION W[TH LOW/H[GH
STORE F]RST BYTE HIGH, SECOND LOW GET CODE PO I NT
CONVERT TO COLOR SWAP HIGH/LOW BYTES FOR WORD AGA]N, ]5 THIS XOR FUNCTION NO, JUST STORE THE VALUES FUNCTION WITH FIRST HALF LOW
MOVE
STORE SECOND PORTION HIGH POINT TO NEXT LOCATION
KEEP GO ING
VIDEO (01/10/86) 5-75
IBM Pe .. aClnal Compute .. MACRO Aaaemble.. Ve .. alon 2.00 VIDEO ---- 01/10/86 VIDEO DISPLAY BIOS
1-15 01-10-66
1559 0635 5E 1560 0636 SF 1561 0637 47 , 562 0636 41
1563 0639 E2 C5 1564 0638 E9 0130 R 1565 063E 1566 1561
1566 1569 063E
1510 063E E6 06E9 R 1571 0641 88 FO
1572 0643 83 EC 08 1573 0646 68 EC 1574 1575 1576
1577 0648 80 3E 0049 R 06 1578 0640 06 1579 064E IF 1560 064F 72 19 1561 1562 1563 1564
1565 0651 B6 04 1566 0653
1567 0653 8A 04 1588 0655 68 46 00 1589 0658 45 1590 0659 8A 84 2000 1591 0650 88 46 00 1592 0660 45 1593 0661 63 C6 50 1594 0664 FE CE
1595 0666 75 E8 1596 0668 E8 16 1597
15Sl8
1599 066A
1600 066A 01 E6 1601 066C 86 04 1602 066E 1603 066E E8 06CF R
1604 0671 81 C6 IFFE 1605 0675 E8 06CF R 1606 0678 61 EE IF82 1601 061C FE CE 1606 067E 75 EE 1609 1610 1611 0680 1612 0680 BF 0000 E 1613 0683 OE 1614 0684 07 1615066583 ED 08 1616 0666 8B F5
1617 068A BO 00 1616 068C 1619 068C 16 1620 0680 IF
1621 068E BA 0060 1622 0691 1623 0691 56 1624 0692 57 1625 0693 B9 0004
1626 0696 F3/ A7 1627 0698 SF 1628 0699 5E
1629 069A 74 IE 1630 069C FE CO 1631 069E 83 C7 08 1632 06A1 4A 1633 06A2 75 EO 1634
1635 1636
1631 06A4 3C 00 1638 06A6 74 12 1639 06A8 28 CO 1640 06AA 6E 08 1641
1642 06AC C4 3E 007C R 1643 06BO 8C CO 1644 0682 DB C7 1645 06B4 74 04 1646 0686 BO 80
1641 06B8 E8 02 1648 1649 1650
1651 06BA 1652 06BA 83 C4 08 1653 0680 E9 0130 R 1654 06CO 1655 1656 1657 1658 1659 1660 1661 06CO 1662 06CO 51 1663 06C I 89 0008 1664 06C4 1665 06C4 00 C8
1666 06C6 01 00 1661 06C8 01 Fo 1668 06CA E2 F6 1669
1610 06CC 95 1671 06CO 59 1672 06CE C3
POP
51
I RECOVER CODE PO INTER
POP
01
RECOVER REGEN PO INTER
INC
01
POINT TO NEXT CHAR POSITION
INC
01
LOOP
58
; MORE TO WRITE
..IMP
VIDEO RETURN
G1R- -A-P-H-I-C-S=-W-R-IT-E---E--N-O--P- ----------- -------
; ;
---GRAPH
---
I
-
-CS---RE-A-D--
-
-
-
--------------------
GRAPHICS READ PROC
NEAR
CALL
S26
CONVERTED TO OFFSET I N REGEN
h40V
SI,AX
SAVE IN SI
SU8
sP,a
ALLOCATE SPACE FOR THE READ CODE POINT
h40V
8P, SP
POINTER TO SAVE AREA
1----- OETERh4INE GRAPHICS MODES
;-----
CNP PUSH
POP JC
:~RT_NODE, 6
as
513
HIGH RESOLUTION READ
, PO I NT TO REGEN SEGh4ENT
; MEOI Uh4 RESOLUT I ON
S12: S141
GET VALUES FROM REGEN BUFFER AND CONVERT TO CODE POINT
MOV
OH,4
I NUMBER OF PASSES
NOV NOV
INC NOV
NOV INC AOO OEC
JNZ JNP
1~p~~~~
BP
1~p'~~~2000H]
BP
51,80
""512
SHORT SIS
I GET FIRST BYTE I SAVE I N STORAGE AREA
I NEXT LOCATION
1 GET LOWER REG I ON BYTE
I AD.JUST AND STORE
I PO I NTER I NTO REGEN
I LOOP CONTROL I DO IT SOh4E '"'ORE I GO hlATCH THE SAVED CODE POINTS
NED I UM RESOLUT I ON READ
SAL MOV
SI,I OH,4
J hIED RES READ ; OFFSET·2 SINCE 2 BYTES/CHAR I NUMBER OF PASSES
CALL ADD CALL
SUB DEC JNZ
523 SI,2000H-2 523 S I ,2000H-80+2 DH 51.
I GET BYTES FROM REGEN INTO SINGLE SAVE ; GO TO LOWER REG I ON I GET THIS PAIR INTO SAVE I ADJUST POINTER BACK INTO UPPER
I KEEP GO I NG UNT I L ALL 8 DONE
S16: 517:
SAVE AREA HAS CHARACTER IN IT, NATCH IT
NOV PUSH
01 ,OFFSET CRT CHAR GEN
CS
-
I FIND CHAR
I ESTABLI SH ADDRESSING
POP
E5
CODE POINTS IN CS
SUB NOV
BP,a SI.BP
AD.JUST POINTER TO START OF SAVE AREA
MOV
AL,a
I CURRENT CODE POINT BEING hlATCHED
PUSH POP MOV
55 OS DX,I26
1 ESTABLISH ADDRESSING TO STACK 1 FOR THE STR I NG COhlPARE I NUhlBER TO TEST AGAINST
PUSH PUSH NOV REPE
POP PDP JZ INC ADD DEC JNZ
5 I 01 CX,4
CNPSW 01 51 518 AL 01,8
OX 511
; SAVE SAVE AREA POINTER I SAVE CODE POINTER ; NUhlBER OF WORDS TO MATCH ; CO,",PARE THE 6 BYTES AS WORDS I RECOVER THE PO INTERS
I IF ZERO FLAG SET. THEN MATCH OCCURRED I NO hlATCH, NOVE ON TO NEXT 1 NEXT CODE PO I NT 1 LOOP CONTROL ; 00 ALL OF THEM
;----- CHAR NOT MATCHED, MIGHT BE IN USER SUPPLIED SECOND HALF
CNP JE SUB NOV ASSUME LE5 NOV OR JZ
NOV
JMP ASSUME
AL,O Sl8 AX ,AX DS,AX OS:ABSO OI,.EXT PTR AX,ES -
AX.DI 518 AL,I28 Sib DS:OATA
AL<> 0 IF ONLY 1ST HALF SCANNED IF. 0, THEN ALL HAS BEEN SCANNED
I E STABL I SH ADDRESS I NG TO VECTOR
GET POINTER SEE IF THE POINTER REALLY EXISTS IF ALL 0, THEN DOESN'T EXIST NO SENSE LOOK I NG OR I GIN FOR SECOND HALF GO BACK AND TRY FOR IT
1----- CHARACTER IS FOUND I AL=O IF NOT FOUND)
5181
ADD JhlP GRAPH I CS READ
SP.8 V IDEO RETURN END?
I READJUST THE I ALL DONE
J --- - - - - -=- - - - - - - - - - ------------- -- ---- -- -----
I EXPAND BYTE
I TH I S ROUT I NE TAKES THE BYTE IN AL AND DOUBLES ALL
a I OF THE BITS, TURNING THE BITS INTO 16 BITS.
I ~;
~
----- ---- THE RESULT IS LEF
;~~C
N~~~
T---IN-
-A-X----------
--
------
STACK.
THROW
AWAY
SAVE
S22:
PUSH NOV
RDR RCR 5AR LOOP
CX CX, 8
AL.' BP.I BP,I 522
I SAVE REGI STER I SH I FT COUNT REG I STER FOR ONE BYTE
1 SHIFT BITS, LOW BIT INTO CARRY FLAG I MOVE CARRY FLAG (LOW BIT) INTO RESULTS I SIGN EXTEND HIGH BIT IQOUBLE IT) I REPEAT FOR ALL 8 BITS
XCHG POP RET
AX,SP CX
I hlOVE RESULTS TO PARAMETER REG I STER J RECOVER REG I STER J ALL DONE
5-76 VIDEO (01/10/86)
IBM Person.' Computer MACRO Assemb' er Ver s i on 2.00 VIDEO ---- 01/10/86 VIDEO DISPLAY BIOS
1-16 01-10-86
1673 06CF 1614 1615 1616 1611 1618 1619 1680 1681 1682 1683 1684 1685 1686 1681 06CF 1688 06CF AD 1689 0600 86 C4 1690 0602 89 COOO 1691 0605 82 00 1692 0601 1693 0601 85 C I 1694 0609 14 01 1695 060B F9 1696 060C 1697 060C DO 02 1698 060E 0 I E9 1699 06EO 0 I E9 1100 06E2 13 F3 1101 06E4 88 56 1102 06E7 45 1103 06E8 C3 1104 ObE9 1105 1106 1101 1108 1109 1110 1111 1112 1113 1114 1115 111606E9 1111 06E9 AI 0050 R 1118 06EC 1119 06EC 53 1120 06ED 8B 08 1121 06EF AO 004A R 1722 06F2 F6 £4 1123 06F4 01 EO 1124 06F6 0 I EO 1125 06F8 2A FF 1126 06FA 03 C3 1127 06FC 58 1728 06FD C3 1729 06FE 1730 113 I 1132 1733 1734 1735 1136 1131 1138 1139 1140 1141 1742 1143 1744 1145 1146 1141 1748 1149 1750 1151 1152 1153 06FE 1154 06FE 97 1155 06FF 84 03 1156 0101 8A 3£ 0062 R 1157 0105 CD 10 1158 0101 88 C7 1159
1160 1161
1162 0109 3C 00 1763 070B 16 46 1164
1765 1766 0700
1767 0700 84 OA 1768 070F 89 000 1 17690712 CD 10 1110
1771 1772
17730714 FE C2 17740716 3A 16 004A R 1115 aliA 15 33 1776 011C B2 00 1771 011E 80 FE 1778 0121 15 2A 1779
1780 171!11 0723 171!12 0723 84 OZ 11830725 CO 10
1784
1185 1186
512-1------E-N-D-P------------ ---- -- ---------------------
, MED READ BYTE
I THIJ RouTINE WILL TAKE 2 BYTES FROM THE REGEN BUFFER,
; COMPARE AGA I NST THE CURRENT FOREGROUND COLOR, AND PLACE
I THE CORRESPOND[NG ON/OFF BIT PATTERN INTO THE CURRENT
; POSITION IN THE SAVE AREA
1 ENTRY -
= ; 51,05 = POINTER TO REGEN AREA OF INTEREST
I BX EXPANDED FOREGROUND COLOR
; sp '" PO I NTER TO SA VE AREA
I EXIT -
--- --- --- ----- --- -- I S I AND BF' ARE INCREMENTED
- - - - - ~;;
;~~~----~~;~
- --- -- -- -- -- -
LODSW
GET FIRST BYTE AND SECOND BYTES
XCHG
AL,AH
SWAP FOR COMPARE
MOV
CX,OCOOOH
2 BIT MASK TO TEST THE ENTRIES
MOV
DL,O
RESULT REGISTER
S24 :
TEST OZ
AX,CX SZ5
IS TH [5 SECT I ON 8ACKGROUNO? IF ZERO, IT [5 BACKGROUND ICARRY_Oj
STC
WASN'T, SO SET CARRY
S25:
RCL SHR SHR
DL,' CX,I CX,I
I MOVE THAT BIT INTO THE RESULT MOVE THE MASK TO THE RIGHT BY 2 BITS
ONC NOV
INC
SZ' lBP] ,OL BP
DO [T AGAIN IF MASK DIDN'T FALL OUT STORE RESULT IN SAVE AREA ADJUST POINTER
RET
ALL DONE
S23
ENDP
1---- - - - - - - - -- - - - - - - - -- - - - - - -- - - - - -------
I V4 POSITION
1 THIS ROUTINE TAKES THE CURSOR POSITION CONTAINED IN
; THE MEMORY LOCATION, AND CONVERTS IT INTO AN OFFSET
INTO THE REGEN BUFFER, ASSUMING ONE BYTE/CHAR.
FOR MED I UM RESOLUT I ON GRAPH I CS, THE NUMBER MUST
BE DOUBLED.
ENTRY -- NO REGISTERS,MEMORY LOCATION ilCURSOR PDSN IS USED
EXIT--
- ------------- ---- ---- AX CONTAINS OFFSET INTO REGEN BUFFER
;;~---- ;~~C----~~;;
MOV
GRAPH POSN
- PUSH
MOV
MOV
MUL
SHL
SHL
SUB
ADD
POP
RET
S26
ENOP
WR I TE_TTY
AX ,.CURSOR POSN
LABEL NEAR
BX
BX,AX
AL, BYTE PTR IICRT COLS
AH
-
AX,I
AX,I
BH,BH
AX,BX
BX
I GET CURRENT CURSOR
SAVE REG I STER SAVE A copy OF CURRENT CURSOR
GET BYTES PER COLUMN MULTIPLY ElY ROWS
MULTIPLY·4 SINCE 4 ISOLATE COLUIo4N VALUE DETERM I NE OFFSET RECOVER PO INTER ALL DONE
ROWS/BYTE
----------------------------------------------------------.-----
THIS INTERFACE PROVIDES A TELETYPE LIKE INTERFACE TO THE
VIDEO CARDS. THE INPUT CHARACTER IS WR[TTEN TO THE CURRENT
CURSOR POSITION, AND THE CURSOR IS MOVED TO THE NEXT POSITION.
IF THE CURSOR LEAVES THE LAST COLUIo4N OF THE FIELD, THE COLUIo4N
IS SET TO ZERO, AND THE ROW VALUE IS I NCREIo4ENTED. IF THE ROW
ROW VALUE LEAVES THE FIELD, THE CURSOR I S PLACED ON THE LAST ROW.
FIRST COLUMN, AND THE ENT I RE SCREEN IS SCROLLED UP ONE LINE.
WHEN TI-£ SCREEN I 5 SCROLLED UP, THE ATTR IBUTE FOR FILL I NG THE
NEWLY BLANKED LINE IS READ FROM THE CURSOR POSITION ON THE PREVIOUS
LINE BEFORE THE SCROLL, IN CHARACTER MODE.
a THE COLOR I S USED.
IN GRAPHICS MODE.
ENTRY -
I AH I '" CURRENT CRT MODE
I ALI = CHARACTER TO BE WR I TT£N
NOTE THAT BACK SPACE, CARRIAGE RETURN. BELL AND LINE FEED ARE
HANDLED AS COIo4Io4ANDS RATHER THAN AS DISPLAY GRAPHICS CHARACTERS
IBLI = FOREGROUND COLOR FOR CHAR WR ITE IF CURRENTLY IN A GRAPHICS MODE
EXIT -
=- ---- ------------------------ --------- ;
ALL REGISTERS SAVED THROUGH VIDEO EXIT IINCLUDING IAXII
1
1- - - - - - ~ - - - - - - - - - - - - - - - - - - - - - - - - - - -- --- -
ASSUME OSIOATA
WR I TE TTY
PROC
NEAR
- XCHG
D[ ,AX
I SAVE (AXI REGISTER IN 1011 FOR EXIT
MOV MOV
AH,03H BH, .ACT I VE PAGE
I READ CURSOR POS IT ION
I GET CURRENT PA.GE SETT I NG
INT
10H
-
I READ THE CURRENT CURSOR POSITION
MOV
AX,OI
I RECOVER CHARACTER FROM 101 I REG I STER
1----- OX NOW HAS THE CURRENT CURSOR POSITION
COP OSE
AL,CR U8
I SIT CARR I AGE RETURN OR CONTROL
GO TO CONTROL CHECKS IF IT IS
~~~---
WR I TE THE CHAR TO THE SCREEN
NOV NOV INT
AH,OAH CX,I IOH
WR I TE CHARACTER ONLY COIo4MAND
ONL Y ONE CHARACTER
WR [TE THE CHARACTER
1----- POSITION THE CURSOR FOR NEXT CHAR
INC CN.
ONZ NOV
C"" .lNZ
U, DL
OL,BYTE PTR IICRT COLS
DL.O DH.25-1 U6
TEST FOR COLUIo4N OVERFLOW
SET CURSOR
COLUh4N FOR CURSOR
CHECK FOR LAST ROW
SET_CURSOR _I NC
1----Ul :
1-----
SCROLL REQUIRED
NOV INT
AH,02H
IOH
1 SET THE CURSOR
DETERMINE VALUE TO FILL WITH DURING SCROLL
VIDEO (01/10/86) 5-77
IBM Per.O"ill Computer MACRO Assembler Versio" 2.00 VIDEO ---- 01(10/86 VIDEO DISPLAY BIOS
1787 0727 AO 0049 R
1788 072A :iC 04
1789 Ol2C 72 06
1790 072E 3C 07
1791 0730 B7 00
1792 0732 75 06
1793 0734
1794 0734 94 08
1795 0736 CO 10
1796 0138 8A F'C
1797 073A
1798 073A B8 060 I
,799 0730 2B C9
1800 0731" B6 18
1801 074\ 8A 16 004A R
1802 0745 FE CA
1803 0747
1804 0747 CD 10
1805 0749
1806 0749 97
1807 074A E9 0130 R
1808
1809 0740
1810 0740 F'E C6
1811 074F'
1812 074F' B4 02
1813 0751 EB F4
1814
1815
1816 0753
1811 0153 74 13
1818 0755 3C OA
1819 0757 74 13
1820 0759 3C 07
1821 075B 74 16
1822 0150 3C 08
1823 OnF 15 AC
1824
1825
1826
1827 0761 OA 02
1828 0763 74 EA
1829 0765 4A
1830 0766 EB E7
1831
1832
1833
1834 0768
1835 0768 B2 00
1836 076A EB E3
1837
1838
1839
1840 076C
1841 07bC 80 FE 18
1842 0761" 75 DC
1843 077\ EB BO
1844
1845
1846
1847 0773
1848 0773 B9 0533
1849 0776 B3 IF
\850 0778 E8 0000 E
\851 OnB EB CC
1852 0770
1853
1854
1855
1856
1857
1658
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868 0770 03 03 05 05 03 03
1869
03 04
1870
1871
1812 0785
1873 0785 B4 00
1874 0787 8B 16 0063 R
1875 078B 83 C2 06
1876 018E EC
1871 0781" A8 04
1878 0791 74 03
1879 0193 E9 0816 R
1880
1881
1882
1883 0796 A8 02
1884 0798 75 03
1885 079A E9 0820 R
1886
1587
1888
1889 0790
1890079084 10
1891
1692
1893
1894 0791" 8B 16 0063 R
1895 07 A3 8A C4
1896 07A5 EE
1897 07A6 90
1898 07A7 42
1899 07A8 EC
1900 07A9 8A E8
U2;
U3;
U4; U5, U6, UT:
,-- - - U8:
"OV COP JC COP "OV JNE
"OV INT MOV
MOV SUB "OV "OV OEC
INT
XCHG J"P
AL I OCRT MODE AL,'" U2 AL,7
"',0 U.
AH,08H 10H BH,AH
AX,0601H
CX,CX
DH,25-1
DL, BYTE PTR OCRT COLS
DC
10H
AX,DI VIDEO_RETURN
INC
OH
"OV J"P
AH,02H U'
CHECK FOR CONTROL CHARACTERS
JE COP JE COP ..£ COP
JNE
U'
AL.LF' UIO AL,07H
UII
AL.08H
UO
I GET THE CURRENT MDDE
I READ-CURSOR
FILL WITH BACKGROUND SCROLL-UP READ-CURSOR
GET READ CURSOR COMMAND READ CHAR/ATTR AT CURRENT CURSOR STORE IN BH SCROLL-UP
SCROLL DIE LINE
UPPER LEFT CORNER
LOWER RIGHT ROW
LOWER RIGHT COLUMN
VIDEO-CALL-RETURN SCROLL UP THE SCREEN TTY-RETURN RESTORE THE ENTRY CHARACTER FROM RETURN TO CALLER
1011
SET-CURSOR-INC NEXT ROW SET-CURSOR
J ESTABL I SH THE NEW CURSOR
WAS IT A CARRIAGE RETURN
IS IT A LINE F'EED GO TO LINE FEED IS IT A BELL GO TO BELL I S IT A BACKSPACE IF NOT A CONTROL, DISPLAY IT
BACK SPACE FOUND
1-----
OR JE DEC
J"P
DL.DL U1 OX U1
CARRIAGE RETURN FOUND
IS IT ALREADY AT START OF LINE
=- SET CURSOR
NO
.JUST MOVE IT BACK
SET_CURSOR
U9:
"OV JMP
DL,O U1
MOVE TO I" I RST COLUMN SET_CURSOR
,----- LINE FEED FOUND
UIOI
e"p
JNE J"P
OH,25-1 U. UI
I BOTTOM OF' SCREEN I YES, SCROLL THE SCREEN I NO · .JUST SET THE CURSOR
; ----- BELL FOUND
UIII
WR I TE
MOV MOV CALL .JMP TTY
CX,1331 BL.31 BEEP U5 ENDP
I DIVISOR FOR 896 HZ TONE I SET COUNT FOR 3 1/64 SECOND FOR BEEP I SOUND THE POD BELL I TTY_RETURN
*
I - - - - ':' - - - - - - --- - - - -- - - - - - - - - - - - - - -- - - - - - --- - - - - - ---- - - - - - -- - - - - - . - - - - - --
; LIGHT PEN
I
THIS ROUTINE TESTS THE LIGHT PEN SWITCH AND THE LIGHT
*
;
PEN TRIGGER. IF BOTH ARE SET. THE LOCATION OF THE LIGHT
I
;
PEN IS DETERMINED. OTHERWISE. A RETURN WITH NO INFORMATION
;
IS h4ADE.
ON EXIT:
(AHI = 0 IF NO LIGHT PEN INFORMATION IS AVAILABLE
BX,CX,DX ARE DESTROYED
IAHI = 1 IF LIGHT PEN IS AVAILABLE
j OH. OL j = ROW, COLUMN OF CURRENT LIGHT PEN POS I T I ON
, = (CH) · RASTER pas I Tl ON IBX) BEST GUESS AT PIXEL HORIZONTAL POSITION
------ - ------------------- -- ----- -- -------- ----- - ; -
-- ---
- ---- ----- -
---- -
ASSUME DSIOATA
DB
3,3,5.5,3,3.3,4
I SUBTRACT_TABLE
,----- WAIT FOR LICiHT PEN TO BE DEPRESSED
READ LPEN
-
MOV
"OV ADO IN TEST J1
J"P
PROC
NEAR
AH,O
OX ,."DDR 6845
OX,6
-
AL.OX
AL,004H
V6 A V6
SET NO LIGHT PEN RETURN CODE GET BASE ADDRESS OF 6845 POINT TO STATUS REGISTER GET STATUS REGISTER TEST LIGHT PEN SWITCH I GO IF' YES I NOT SET. RETURN
;----- NOW TEST FOR LIGHT PEN TRIGGER
V6_A:
TEST JNZ J"P
AL,2 V1A V1
; TEST LIGHT PEN TRIGGER ; RETURN WITHOUT RESETT I NG TR I GGER
;----- TRIGGER HAS BEEN SET. READ TI-£ VALUE IN
V7AI
"OV
AH,I6
I LIGHT PEN REGISTERS ON 6845
;----- INPUT REGISTERS POINTED TO BY AH, AND CONVERT TO ROW COLUMN IN (OX)
"OV "OV OUT NOP
INC IN
"OV
OX, "AOOR 6645 AL,AH DX,AL
OX AL,OX CH,AL
ADDRESS REG I STER FOR 6845 REG I STER TO READ SET IT UP I/O DELAY DATA REG I STER GET THE vALUE SAVE IN CX
5-78 VIDEO (01/10/86)
t.." IBM P."aon.1 Comp ....
MACRO AIIII.mbl." V."slon 2.00
VIDEO ---- 01/10/150 VIDEO DISPLAY 810S
1-18 01-10-60
1901 07A8 4A 1902 07AC FE C4 1903 alAE eA C4 1904 07BO EE 1905 0781 42
'900 0782 90 1901 01B3 EC 19015 01B4 eA E5 1909 1910 1911 1912 0786 SA IE 0049 R 1913 078A 2A FF 1914 01BC 2E: 8A. 9F 0770 R 1915 01CI 2B C3 1916 01C3 158 IE 004E R 1911 01Cl Dl EB
1918 01e9 2B C3
1919 01CB 79 02 1920 07CO 28 CO 1921 1922 1923
1924 07CF 1925 01CF Bl 03 1926 010 I 60 3E 0049 R 04 1921 0706 12 2A 1926 0106 80 3E 0049 R 01 1929 0100 14 23
'930 1931 1932 1933 010F B2 28 1934 01El F6 F2 1935 1930 1937 1938 01E3 8A E6
1939 alES 02 ED 1940 01El 6A OC
1941 07E9 2A FF 1942 01EB 80 3E 0049 R 06 1943 01FO 75 04 1944 01F2 81 04 1945 01F4 DO E4 1940 01F6
1941 01F6 03 E3 1948 1949 1950 1951 01F6 8A D4
1952 01FA 8A FO 1953 01FC 00 EE 1954 01FE DO EE 1955 0600 EB 12 1956 1951 1958
1959 0802 1960 0802 F6 36 004A R 1961 0600 8A Fa 1962 0608 8A 04 1963 080A 02 EO
1964 080C 8A E8
1905 080E 8A DC 1900 0810 32 FF 1961 0612 03 E3 1968 0614
1909 0614 B4 01
1910 0816 1911 0816 52 1972 0611 88 10 0063 R 1913 061B 83 C2 07
1914 081E EE 1915 081F SA 1916 0820 1977 0820 50 1916 0821 SF 1919 0622 SE 1960 0623 IF 1961 08-24 IF 1962 0825 IF
1983 0826 IF 1964 0821 07 1985 0626 CF
1986 0829 1981 0829 1966
,-----
DEC INC MoV OUT INC NoP IN MOV
Ox AH AL,AH DX,AL ox
AL,DX AH,CH
I ADDRESS REG I STER
I SECOND DATA REGISTER
I POINT TO DATA REGISTER , 1/0 DELAY I GET SECOND OAT A VALUE , AX HAS INPUT VALUE
AX HAS THE VALUE READ IN FROM THE 0645
1-----
MoV SUB MoV SUB MOV SHR SUB
"NS SUB
:~::~RT_MODE
BL,CSIVI (ex) AX,BX 8X ,oCRT START 8X,! AX,ex V2 AX,AX
DETERMINE MODE OF OPERATION
I MODE VALUE TO ax I DETERM I NE AMOUNT TO SUBTRACT I TAKE [T AWAY
I CONVERT TO CORRECT PAGE OR I GIN IF POSITIVE. DETERMINE MODE <0 PLAYS AS 0
,-----
MoV COP
"B
CMP
"E
CL,3
OCRT MODE,4 V4 -
oCRT MODE,l V4
GRAPHICS MODE
DETERM I NE MODE SET -8 SHTFT COUNT DETERM I NE I F GRAPH I CS OR ALPHA ALPHA_PEN
I ALPHA_PEN
MOV olV
DL.40 oL
DETERM I NE GRAPH I CROW POS I T I ON
DIVISOR FOR GRAPHICS DETERMINE ROW(ALI AND COLUMNCAHI
AL RANGE 0-99, AH RANGE 0-39
MoV
CH,AL
ADC
CH,CH
MOV
BL,AH
SUB
BH,BH
CMP "NE MOV
oCRT MODE,6 V3
CL.4
SAL
AH,I
V3.
SHL
aX,CL
SAVE ROW VALUE IN CH -2 FOR EVEN/ODD FIELD COLUMN VALUE TO ax MULTIPLY BY 6 FOR MEDIUM RES DETERMINE MEDIUM OR HIGH RES
NOT HIGH RES SHirT VALUE FOR HIGH RES COLUMN VALUE TIMES 2 FOR HIGH RES NOT HIGH RES MLL'FIPLY--16 FOR HIGH RES
DETERM I NE ALPHA CHAR POS I T I ON
...,-----
MOV MOV SHR SHR "MP
DL,AH OH,AL
OH.' OH.' SHORT v5
ALPHA MODE ON LIGHT PEN
olV MoV MoV
SAL MOV MOV XOR
SAL V5.
MoV V6 :
PUSH MoV
ADD OUT PDP V,. POP POP PDP POP POP POP POP POP
IRET READ LPEN CODE ENDS
END
BYTE PTR oCRT_COLS DH,AL DL,AH AL,CL
CH.AL 8L,AH aH,eH BX.CL
AH,I
ox
DX,oADOR 6645
DX,7
-
DX,AL
ox
BP 01 S! OS OS OS OS ES
ENOP
COLUMN VALUE FOR RETURN ROW VALUE DIVIDE ey 4
FOR VALUE IN 0-24 RANGE L IGHT_PEN_RETURN_SET
ALPHA PEN DETERMINE ROW.COLUMN VALUE ROWS TO DH COLS TO DL. MUL.TIPLY ROWS - 8 GET RASTER VALUE TO RETURN REGISTER COLUMN VALUE
TO ax
LIGHT PEN RETURN SET INDICATE ~VERY THING SET LIGHT PEN RETURN I SAVE ffETURN VAL.UE {IN CASE I I GET BASE ADDRESS 1 POINT TO RESET PARM I ADDRESS, NOT DATA, IS IMPORTAI'-IT I RECOVER VALUE I RETURN_NO_RESET
I DISCARD SAVED aX,cx,DX
VIDEO (01/10/86) 5-79
IBM P ..... aQn.1 Compute .... MACRO Asslmble.... V..... slon 2.00 BIOSI ---- 01/10/86 INTERRUPT 15H BIOS ROUTINES
I-I 01 - 10-86
I
2
3
·4··
7
0000
10
tt
12
13
1"I5. II1.7.
20 2t 22 23 24 25 26
2227..
30 3t 32 33 3' 35 35 37
...,.330..
42
'3
···· '·47·.
50
'520
·5·3
55
56
57
"5'0'
...."62
·6·3
55
· 7
5'
70 7t 72
773.
75 76
.07777..
Ot
.....2
·'·3··
.7
··
..'0
"'2
93
.S
96
·.·7··
100 101
102
11003.
10' 10.
107 10.
10' ttO Itt tt2 tt3 tt4
0000 0000 FB 0001 80 FC 80 0004 73 06
0006 0006 B4 86
0008 F9
0009 0009 CA 0002
OOOC OOOC 80 FC CO OOOF 14 2E
PAGE 118,121
TITLE BIOSI ---- 01/10/86 INTERRUPT
.LIST
CODE
SEGMENT BYTE PUBLIC
ISH BIOS ROUTINES
PUBLIC CASSETTE_10_I
EXTRN EXTRN
CONF TBL: NEAR DOS I NEAR
I SYSTEM/BIOS CONFIGURATION TABLE
I LOAD IDS) WITH DATA SEGMENT SELECTOR
,; --, 1
I NT 15 H ----- ----------- ------------------ - ------------------------ - ----- INPUT - CASSETTE I /0 FUNCT IONS
IAH) = OOH (AH) :: OIH
(AH) " 02H
'AH) " 03H
= RETURNS FOR THESE FUNCTIONS ALWAYS (AH) = 86H. CY
I}
I
1
I F' CASSETTE PORT NOT PRESENT
1
J-- - - - - - - - - ------ - - - - - - - - - - - - - - - - - - - - - - ---- - - - - - - - ------ - - - - - - - - - - - -- -- - - -- - - - - 1
I I
= INPUT - UNUSED FUNCTIONS
'AH)
04H THROUGH 7FH
r r
;
RETURNS FOR THESE FUNCTIONS ALWAYS IAH) = 86H, CY = I)
;
(UNLESS INTERCEPTED BY SYSTEM HANDLERS)
;
NOTE, THE KEYBOARD I NTERRUPT HANDLER INTERRUPTS WITH AH",4FH
; --------- - - - --- - ----------- -- --------------------- --- - - ----------------------- I
EXTENSIONS
I
IAH)
80H DEVICE OPEN (NULL)
r
IBX) = DEVICE 10
I
ICX) = PROCESS 10
IAH) :: 81H
DEVICE CLOSE (NULLl
(BX) '" DEVICE 10
(CX) = PROCESS [0
(AHl = 82H
PROGRAM TERMINATION INULLl
tBX) :: DEVICE 10
(AHl = 83M EVENT WAIT I NULL!
fAH) :: 84H
JOYSTICK SUPPORT (OX) '" OOH - READ THE CURRENT SW ITCH SETT I NGS RETURNS AL = SWITCH SETTINGS IBITS 7-4)
(OX) = OIH - READ THE RESISTIVE INPUTS
RETURNS AX '" A ( lI) VALUE
ax = Aly) VALUE CX = Bill) VALUE
OX " Blyl VALUE
I AH I 88H EXTENDED MEMORY SIZE DETERMI NE
(AHI
91H
INTERRUPT COMPLETE FLAG SET
(AL)
TYPE CODE
OOH -> 7FH
SER' ALLY REUSABLE DEV ICES
OPERATING SYSTEM MUST SER I ALI ZE ACCESS
80H -> BFH
REENTRANT DEV ICES I ES ,ax I S USED TO
DISTINGUISH DIFFERENT CALLS (MULTIPLE I/O
CALLS ARE ALLOWED S rMUL T ANEOUSL Y)
COH -> FFH
WAIT ONLY CALLS -- THERE IS NO
COMPLEMENTARY 'POST' FOR THESE WAITS ·
THESE ARE TIMEOUT ONLY. TIMES ARE
FUNCT I ON NUMBER DEPENDENT ·
TYPE DESCRIPTION
TIMEOUT
OOH OIH OZH 80H
FDH FEH
" DISK = DISKETTE
'" KEYBOARD
z: NETWORK EStaX -->
-= DISKETTE
z: PR I NTER
NCB MOTOR
START
YES YES NO NO
YES YES
(AH) "COH
RETURN CONFIGURATION PARAMETERS POINTER
RETURNS
a IAH) = OOH AND CY=
(IF PRESENT ELSE 86 AND CY= I)
(ESIBXI " PARAMETER TABLE ADDRESS POINTER
WHEREt
ow ·
DB MODEL BYTE DB TYPE BYTE DB B lOS-LEVEL DB ? -
DB DB DB DB
LENGTH OF FOLLOW I NG TABLE
SYSTEM MODEL BYTE
SYSTEM MODEL TYPE BYTE
BIOS REVISION LEVEL
10000000 = DMA CHANNEL 3 USE 8Y BIOS
01000000 = CASCADED INTERRUPT LEVEL 2 I
00100000 ", REAL TIME CLOCK AVAILABLE I
000 10000 = KEYBOARD SCAN CODE HOOK I AH t
RESERVED
I
RESERVED
RESERVED
RESERVED
ASSUME
- CASSETTE 10 1 STI CMP JAE
CI:
"OV STC
-CI F,
RET
-CI G,
CMP
JE
CS:CODE
PROC
FAR
AH,080H
-CI G
AH,86H
AH,OCOH CONF_PARMS
ENABLE INTERRUPTS
CHECK FOR RANGE OF 00-7FH
SK I P AND HANDLE, ELSE RETURN ERROR
ERROR
SET BAD COMMAND
SET CARRY FLAG ON ICY", I)
COMMON EX I T
FAR RETURN EXIT FROM ROUTINES
CaNT I NUE CHECK I NG FOR FUNCT I ON
CHECK FOR CONF I GURAT I ON PARAMETERS
~
5-80 BIOS1 (01/10/86)
IBN Personal Compute,. NACRO A····ble,. V.rsion 2.00 81051 ---- 01/10/86 INTERRUPT ISH BIOS ROUTINES
1-2 01-10-86
115 116
117 118
119 120
121 122 123
12... 125 126 127
128 129
130 131 132
133
13'" 135
136 137 138
139 1... 0
001180 EC 80 0014 1 ... 25 0016 FE CC 00181... 21 001A. FE CC OOIC U 10 ODIE FE CC 0020 FE CC 0022 H 21 002... FE CC 0026 H 13 0028 FE CC 002A. FE CC 002C FE CC OOZE 14 18
0030 80 EC 08 0033 14 06 0035 FE CC 0037 H 05 0039 EB CB
0038 0038 0038 003B
''''' 0038 '''2 003B F8 '43 003C EB CB 1<4 1.. 5 003E 1<6 141 148 149
150 151 152 153 154 155 003E
156 003E CF 157 003F 158
159 003F 160 003F OE
161 00"0 01 162 00.. 1 BB 0000 E 163 00.... 32 E..
16'" 00"'6 E8 C1 165 0048 166 161 168
16' 110 111 112 113 114 115 116 111 118
" '180 0048
181
182 00... 8 33 CO 183
18-4 004A CF
185 186 OO"B
SU8 .JZ DEC
.JZ DEC JZ DEC
DEC .JZ DEC
.JZ DEC
DEC DEC .JZ
A.H,080H DEV OPEN AH
DEV CLOSE AH PROG TERhI AH-
AH .JOY STICK AH
SYS REQ AH -
AM AH EXT_NENORY
I BASE ON 0 I DEVICE OPEN
180H)
I DEVICE CLOSE
(81HI
PROGRAN TERhllNATION (82Hl I GNORE EVENT WA IT (83H)
I .JOYSTICK BIOS
( S ... H I
SYSTEM REQUEST KEY IGNORE WAIT IGNORE 8LOCK MOVE
(85HI (86HI I87HI
I EXTENDED MEMORY SIZE 188M)
SUB
JZ DEC JZ JMP
AM.8
DEV ICE BUSY
AH
-
I NT COhlPLETE
CI -
I CHECK FOR FUNCTION 190H)
CHECK FOR FUNCTION 191H) GO TO I NTERRUPT COMPLETE RETURN EXIT IF NOT A VALID FUNCTION
DEV OPEN: DEV-CLOSE:
PROG TERMI SYS REQI DEVICE 8USY,
- CLC
J"P
I NULL HANDLERS
TURN CARRY OFF RETURN WITH (AH: 00) AND CYaO
CASSETTE_IO_l ENDP
1--- INTERRUPT COMPLETE ------------------------
I
I
TH I S ROUT I NE I S A TEMPORARY HANOLER
;
FOR I NTERRUPT COMPLETE
I
----- I
;
------
--IN-P-U-T------ --SE-E--P-R-O-L-O-G-U-E----
------
--
--
I
tNT CQt.4PLETE
-
IRET
I NT_COMPLETE
PROC ENDP
NEAR
, RETURN
CONF PARMS
-
PUSH
POP
"OV XOR
JMP
CONF _PARMS
PROe
NEAR
CS
ES
BX, OFFSET eONF TBL
"H,AH
-
CI F
ENDP
FUNCTION (COH)
GET CODE SEGMENT PLACE I N SELECTOR PO INTER GET OFFSET OF PARAMETER TABLE CLEAR AH AND SET CARRY OFF EX I T THROUGH COMMON RETURN
--- INT IS H -- i FUNCTION 88 H - I fO MEMORY SIZE DETERMINE) ---------------- EXT MEMORY - TH (S ROUT (NE RETURNS THE AMOUNT OF MEMORY IN THE SYSTEM THAT IS LOCATED STARTING AT THE IOZ4K ADDRESSING RANGE, AS DETERhllNED BY THE POST ROUTI NES. INPUT AH = 88H
OUTPUT lAX) ::: 0
EXT_MEMORY XOR IRET
EXT_MEhlORY
PROe
AX,AX
ENDP
I SET EXTENDED MEMORY SIZE TO ZERO
I RETURN TO USER
BIOS1 (01/10/86) 5-81
IBM Peraon.1 Computer MACRO A!uembler Version 2.00 BIOS\ ---- 01/10/66 INTERRUPT ISH BIOS ROUTINES
1-3 01-10-86
,.7
I ··
I.'
"0
'",.2
"3 I ·· ,.5
"b
"."7
19.
200 201
202 203
20' 205 20b 207 20. 20. 210 211 212 213
21' 215 21b 211 21.
21' 220 221
222 223 224 225 22. 227 22.
22' 230 231 232 233 234 235 23. 237 238
23' 240
2" 2'2 2'3 2" 2.5
2'. 2'7 2'. 2" 250 251 252 253 254 255 25. 257 258 25. 2.0
2.' 2b2 2.3 2 ··
2b5 2bb 2b7 2.8
2b' 270 271 272 273 274 275 27b 277 278 27. 280 281 282 2.3
2.' 2.5 2.b 2.7 2 ·· 2 ··
2'0 2" 2'2 2.3 294 2.5
2'b 297
2'. 2" 300
OO ... B 004B FB 004C 6B C2 004E BA 020 \ 0051 OA CO 0053 74 09 0055 FE C6 0057 1... 0,1, 0059 EB AB 005B 005B FB 005C EB AB
005E 005E EC 005F 24 FO 0061 EB F8
0063 0063 B3 01
" 0065 E6 0081
0068 51 0069 B3 02
" 006B E8 0081
006E 51
006F B3 0'"
" 0011 E8 008'
0074 51 0015 B3 08 OOll E8 0081 R OOlA 8B Dl OOlC 59 0010 5B
OOlE 56 OOlF EB OA
0081 0081 52 0082 FA
0083 BO 00 0085 E6 43 0081 E8 00 0089 E4 40 008B EB 00 0080 8A EO 008F E4 40 0091 86 EO 0093 50 0094 B9 04FF
0091 EE 0098 EB 00 009A 009A EC 009B 84 C3 009D EO FB 009F 83 F9 00 00A2 59 00A3 75 04 00,1,5 28 C9
00,1,7 EB 20 00A9 00A9 BO 00 OOAB E6 43 00,1,0 EB 00 OOAF E4 40
OOBI 8A EO 00B3 EB 00 00B5 E4 40 OOBl 86 EO
00B9 3B C8 OOBB 13 OB OOBD 52 OOBE BA FFFF
OOCI 2B DO 00C3 03 CA OOCS 5A 00C6 EB 02
., 00C8
00C8 28 C8 OOCA OOCA 81 OOCE DI E. 0000 01 E. 0002 DI E. 0004 DI E.
IFFO
0006 0006 FB 0001 BA 020 I OODA 51
oooe SO OODC B9 04FF OOOF OODF EC
PAGE 1--- ,JOY STICK ------------------------------ ------------------
THIS ROUTINE WILL READ THE JOYSTICK PORT
INPUT (oX I =0 READ THE CURRENT SW ITCHES
RETURNS tAL)= SWITCH SETTINGS IN BITS 1-'"
IDX)=! READ THE RESISTIVE INPUTS
RETURNS (AX)=AIJlI VALUE
(BX):Aly) VALUE
(CX)=B(Jl) VALUE
(oX):B(y) VALUE
,
CY FLAG ON IF NO ADAPTER CARD OR INVALID CALL
I
I - - - - ------ - - - - - - - --- - - - - - - - - - - - - - - - - - - --------- - - - - - - - - - - - - - -- -
JOY STICK
-
STI
MOV
MOV
0ez"
OEC
ez
eMP
ST! JMP
PROC
NEAR
AX,DX DX,20lH AL,AL .JOY 2 AL
,JOY 3 CI
I NTERRUPTS BACK ON GET SUB FUNCT ION CODE ADDRESS OF PORT
; READ Sill [TCHES
READ RES I ST I VE INPUTS GO TO ERROR RETURN
I GO TO COMMON RETURN
IN ANa JMP
AL.DX AL,OFOH JOY_'
1 STRIP UNWANTED B[TS OFF I FINISHED
MOV CAll PUSH MOV CALL PUSH MOV CALL PUSH MOV CALL MOV
.0.POP
PO.
JMP
Bl, I TEST CORD
cx -
Bl,2 TEST CORD
cx -
Bl,4
eTxEST - CORD
Bl,8 TEST CORD DX,CX
ex
BX AX JOY_I
TEST CORD
-
PUSH
CLI MOV
OUT eMP
IN
eM.
MOV
IN
XCHG
PUSH
MOV
OUT
JM.
TEST CORD II
-
IN
TEST
LOOPNZ
CM.
POP
eNZ
SUB
eMP
TEST CORD 2:
-
MOV
OUT
eMP
IN MOV
JM. IN
XCHG
PROC NEAR
ox
AL,O
'.2TIMER+3,AL
"2AL,TIMER
AH,AL AL,TIMER AH,AL AX CX , 4FFH
aX,AL
S'2
AL,DX
AL.IBL
TEST CORD 1
CX,O-
CX SHORT CX,CX SHORT
TEST_CORO_2 TEST_CDRO_3
AL,O
'.2TIMER+3,AL
AL,T1MER
AH,AL
S·2
AL,TiMER
AH,AL
eMP JAE PUSH MOV
CX,AX
TEST CORD 4
OX -
OX.-I
SUB AOD POP eMP
DX,AX
CX,DX
ox
SHORT TEST_CORO_5
TEST CORD 4:
-
SUB
TEST CORD 5:
-
ANa
SHR
SH" SHR
SHR
TEST CORD 31
-
STI
MOV
PUSH
PUSH
MOV
TEST CORD 61
-
IN
CX,AX
CX.lf"FOH CX,I
CX.I
CX,'
CX,'
DX,20IH
ex
AX
CX ....FFH
AL,DX
I SAVE AIXl VALUE
I SAVE AIYJ VALUE
I SAVE SIX) VALUE
SAVE BIY) VALUE GET BIXI VALUE GET AIYI VALUE GET A(XI VALUE FIN I SHED - RETURN
; SAVE BLOCK INTERRUPTS WH I LE READ I NG SET UP TO LATCH TIMER 0
I READ LOW BYTE OF T I MER 0
a READ HIGH eYTE OF TI MER
REARRANGE TO HIGH,LOW SAVE SET COUNT FIRE TIMER
READ VALUES HAS PULSE ENDED?
I ORIGINAL COUNT
a SET COUNT FOR RETURN
EX[T WITH COUNT" 0 I SET UP TO LATCH TIMER 0
READ LOW BYTE OF TI MER 0
READ HIGH BYTE OF TIMER 0 REARRANGE TO HIGH, LOW I CHECK FOR COUNTER WRAP I GO IF NO
I AO,JUST FOR WRAP
I ADJUST
I NTERRUPTS BACK ON FLUSH OTHER INPUTS
COUNT
5-82 BIOS1 (01/10/86)
~
IBM Person. I COl'llputer MACRO Assembler VersiOI"l 2.00 810S1 ---- 01/10/86 INTERRUPT 15H 8105 ROUTINES
301 OOEO A8 OF 302 OOE2 EO F8
303
30. oOE4 5S
" .30' OOE5 59 OOE6 5A
"8307 00E7 C3
309 310 OOES 311 OOES
312 313 OOES 314
TEST
AL.OFH
LOOPNZ TEST_CORD_6
POP
AX
POP
ex
POP
OX
RET
TEST CORD JOY_STICK
ENDP ENOP
CODE
ENDS END
1-'a I-I 0-86
I SET COUNT , RETURN
BIOS1 (01/10/86) 5-83
IBM Personel COrllput.er MACRO Ae"embler Vera ion 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
I-I 01-10-86
PAGE 118.121 TITLE POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
PUBL IC AI
PUBL IC BEEP
PUBL IC CONF TBl
PUBL IC CRT CHAR GEN
PUBL IC DDS-
10
"12
PUBL IC
.5 PUBL IC
PUBL IC
.·7· PUBL IC
DISK BASE
I13.
PUBL IC MD TBL 1 PUBL IC MD-TBlZ
15
PUBL I C MD-TBl3
, 6
PltBL IC hID-TBl4
"18
PUBLIC MD-TBL5 PUBL IC MD-TBL6
2" .
PUBL IC P 0 R
PUBLIC Ri!SET
21
PUBLIC VIDEO PARMS
22
PUBLIC WAITF
23
2'
EXTRN CASSETTE 10 ':NEAR
25
EXTRN DISKETTE-IO-' tNEAR
20
EXTRN DISK lNT-'IREAR
27
EXTRN DSKETTE SETUPINEAR
3.228.
EXTRN
EXTRN EXTRN
KB INT T:NEAR KEYBOARD 10 I I NEAR NEC OUTPUT:NEAR
31
EXTRN PRINTER 10 ':NEAR
32 33
'0 'I EXTRN
EXTRN
RESULTsTNEAR
Rs232
NEAR
3'
EXTRN SEEK :NEAR
35
EXTRN VIDEO_IO_IINEAR
36
337.
EXTRN EXTRN
SET MODE: NEAR SET-CTYPE I NEAR
.·3,·.
EXTRN EXTRN EXTRN
SET-CPOS I NEAR
READ CURSOR: NEAR REAO-LPENINEAR
.2
EXTRN ACT DISP PAGEINEAR
43
EXTRN SCROLL UPI NEAR
44
EXTRN SCROLL-DOWN I NEAR
...5
46 .7
'8
EXTRN EXTRN EXTRN EXTRN EXTRN
READ AC CURRENT: NEAR WR I TE AC: CURRENT: NEAR WR 1TE-C CURRENT: NEAR SET CliL.OR: NEAR
WR I TE DOT 1NEAR
50
EXTRN READ DOT 1NEAR
51
EXTRN WRITE TTY:NEAR
52
EXTRN v IDEO::STATEINEAR
53
.L1ST
54
5··5
57
THE BIOS ROUTINES ARE MEANT TO BE ACCESSED THROUGH SOFTWARE INTERRUPTS ONLY. ANY ADORESSES PRESENT IN THE LISTINGS ARE INCLUDED ONLY FOR COMPLETENESS.
58 5.
60
NOT FOR REFERENCE. APPL I CA T IONS WH 1CH REFERENCE
ABSOLUTE ADDRESSES 'w I TH I N THE CODE SEGMENT v lOLA TE THE STRUCTURE AND DES I GN OF B I as.
61
b2
------------- ---- ---- -- I --------- - - - - -- ---------- ----------- - - - -- - - ----------- - - - -----
; ---- ------- -----
·b·'
65 0000
---- ---- --------- ;
~o~;
ROM RES I DENT CODE
~~~~N;-~;;~
;~~~~~-
56 67 0000 lFFF (
DB
01 FFFH Our
10CCHI I FilL UNUSED LOCATIONS WITH INTERRUPT 3
668.
CC
70
71 72 0000 73 0000 36 32 58 30 38 35
DRG ORG DB
·OEOOOH
'62X085, COPR. IBM 1986'
1 COPYRIGHT NOTICE
14
31 20 43 4F 50 52
75
2E 20 49 42 40 20
16 77
31393836
.-- ------- --- - - ---------- - - - - ------ ---- -- - -- ---
78 7. 80
..3,.2
··.07··6
..,..0
--- ;
-
-
-
-
-
-
INITIAL
-------
RELIABILITY
------------
-
-T-E-ST-S-------P--H-A-S--E-! -
ASSUME
CS: CODE. SS ICODE. ES I ....BSO ,OS IDATA
0016 0005 R 00180181 R
CI
Ow
C2
ow
00 I A 20 4B 42 20 4F 4B F3B
DB
00
ClI
C2' · KB 01'\' .CR
1 RETURN ADDRESS I RETURN ADDRESS FOR DUMMY ST....CK I KB FOR MEMORY SIZE
LOAD A BLOCK OF TEST CODE THROUGH THE KEYBO ....RD PORT FOR MANUFACTUING TEST ·
THIS ROUTINE WILL LOAD A TEST (MAX lENGTH=FAFFH) THROUGH
THE KEYBOARD PORT. CODE WILL BE LOADED AT LOCAT I ON
.9·3·2
...5
..9786
000010500. AFTER LOADING, CONTROL WILL BE TRANSFERED TO LOCATION 000010500. STACK WilL BE LOCATED .JUST BELOW THE TEST CODE. nils ROUTINE .... SSUMES TH .... T THE FRIST 2 BYTES TRANSFERED CONTAIN THE COUNT OF BYTES TO BE LOADED (BYTE ,,,,COUNT LOW, BYTE Z .. COUNT HI.)
,----- FIRST. GET THE COUNT
E. 100
101 0021 102 0021
19FO R
103 0024 8 .... Fe
MFG_BOOT: CALL .Ov
SP TEST eH-;-Bl
GET COUNT LOW
S.... VE IT
10' 00Z6 EB 19FQ R , 05 0029 8 .... EB
CALL .OV
SP TEST CH-;-BL
GET COUNT HI
lOb 002B 8A CF
.ov
GL,BH
GX NOW HAS COUNT
107 0020 Fe
CLD
SET CIR. FL....G TO I NCR IMENT
10' 002E FA 10. 002F BF 0500
CLI .OV
DI,0500H
SET TARGET OFFSET (05=0000 I
110 0032 80 FO
III 0034 E6 21
112 0036 BO OA
"'" .
0038 E6 20
003A BA 0061
"OV OUT .OV OUT
"OV
"L.OFDH INTAOI,AL
AL.OAH INTAOO,AL
DX.PORT_B
UNMASK K/B INTERRUPT
I SEND READ INT. REQUEST REG. e"o
I SET UP PORT B ADDRESS
5-84 POST (01/10/86)
18t.4 Personal Compute,. t.4ACRO Assemble,. Ve,.sion 2.00 POST ----- 0 III 0/86 SYSTEt.4 POST ANa 8105 PROCEDURES
,-,
01-10-86
liS lib
II)
118
119 120 121 122 123 124 I2S I2b 12) 128 129 130 131 , 32
13'
,.,13'134
13.
138 139 140 141 142 143 144 145 146 141 148 149 150 15, 152 153 154 155 156 151 158 159 160 161 162 163 164 165 166 161 , b8 , b9 , )0
')1 112 113 114 115 116 111 116 119 180 181 182 I a3 184 185 186 181 188 189 190 191 192 193 194 195 196 19)
198
19.
'20010
202 203 204 205 206 201 208 209 210 21 1
'12 213 214 2IS 216 211 218 219 220 221 222 22. 224 225 226 221
0030 88 4CCC
0040 84 02
0042
0042 8A e3
0044 EE
0045 aA CT
0041 EE
0048 4A
0049
0049 E4 20
004B 22 C4
004D 14 FA
004F EC
0050 AA
0051 42
---- 0052 E2 EE
0054 EA 0500
R
0058 005B 005B FA 005C 84 05 005E 9E 005F 13 4A 0061 15 4B 0063 18 46 0065 19 44 0061 9F 006B 8 I 05 006A 02 EC 006C 13 3D 006E 80 40 0010 DO EO 0012 11 31 0014 32 E4 0016 9E 0011 16 32
0019 18 30 0018 1A 2E 001D 9F
001E 02 EC 0080 12 29 00a2 DO E4 0084 10 25
0086 88 FFFF 0089 F9 OOBA 8E D6 OOBC 8e DB OOBE BE C3 0090 Be e I 0092 8E DI 0094 8e D2 0096 88 E2 0098 88 EC 009A 88 F5 00ge a8 FE 009E 13 01 OOAO 33 Cl 00A2 15 01 00A4 F8 00A5 E8 E3 OOAl OOAl 08 e7 00A9 14 01 500A8 F4
OOAC
OOAC E6 AO OOAE E6 83 0080 8A 03D8 0083 EE 0084 FE CO 0086 82 8a 0088 EE 0089 80 89 OOBB E6 63 OOBD 80 A5
OOBF E6 61
ooel 80 01 00C3 E6 60 00C5 8C C8 OOCl 8E DO 00C9 8E D8
OOCB FC
OOCC B8 0000 OOCF BC 0016 R 00D2 E9 I BBF R 0005 15 04
MOV
8X,4CCCH
I CONTROL 8 I T5 FOR PORT B
TST:
MOV
AH,02H
I K/B REQUEST PENDING MASK
MOV
AL,BL
OUT
DX,AL
, TOGGLE K I 8 CLOCK
MOV
AL,BH
OUT
DX,AL
OEe
DX
, POINT OX AT ADDR. 60 IKB DATA)
TSTII
IN
AL,INTAOO
GET IRR REG
AND
AL,AH
KB REQUES T PEND I NG?
JZ
TSTI
LOOP TILL OATA PRESENT
IN
AL,DX
GET DATA
STOS8
STORE IT
INC
DX
POINT DX 8ACK AT PORT B (61)
LOOP
TST
LOOP TILL ALL BYTES READ
JM.
.MFG_TEST_RTN
FAR JUMP TO CODE THAT WAS JUST
; -- --- - - ---- - - - -- - - ----------------- - - - - LOADED
I
8088 PROCESSOR TEST
; DESCRIPTION
VERIFY 80aa FLAGS, REGISTERS
-- ,- -
------AN-D-
-
COND
----
I
-
T--1-0-N-A-L--JU--MPS
-------
-
---
ASSUME CS:CODE,DSINOTHING,EStNOTH lNG, SSINOTH I NG
ORG
OE05BH
ORG
0005BH
RESET I
START:
eLi MOV
SAHF
AH,OOSH
01 SA8LE INTERRUPTS SET SF', CF, ZF. AND AF FLAGS ON
....e
ERROl
GO TO ERROR ROUT I NE IF CF NOT SET
JNZ
ERROl
GO TO ERROR ROUT I NE IF ZF NOT SET
IN.
ERROl
GO TO ERROR ROUT I NE IF PF NOT SET
JNS LAHF
ERROl
GO TO ERROR ROUT I NE IF SF NOT SET LOAD FLAG I MAGE TO AH
MOV
CL,5
LOAD COUNT REG WITH SH I FT COUNT
SHR JNe MOV
AH,CL ERROl AL ,40H
SHIFT AF INTO CARRY 81T POSITION GO TO ERROR ROUT I NE IF AF NOT SET SET THE OF FLAG ON
SHL
AL, I
SETUP FOR TEST I NG
JNO
ERROl
GO TO ERROR ROUT I NE IF OF NOT SET
XOR
AH,AH
SETAHaO
SAHF
CLEAR SF, CF, ZF, AND PF
JBE
ERROl
GO TO ERROR ROUTINE IF CF ON
GO TO ERROR ROUTI NE IF ZF ON
JS
ERROl
J.
ERROl
GO TO ERROR ROUT I NE IF SF ON GO TO ERROR ROUT I NE IF PF ON
LAHF
LOAD FLAG IMAGE TO AH
SHR
AH,CL
SHIFT 'AF' INTO CARRY 81T POSITION
Je
ERROl
GO TO ERROR ROUT I NE IF ON
SHL
AH.I
CHECK THAT 'OF' I S CLEAR
JO
ERROl
GO TO ERROR ROUT I NE IF ON
;----- READ/WRITE THE 8088 GENERAL AND SEGMENTATION REGISTERS
;
WITH ALL ONE'S AND ZEROES·S.
MOV
AX, OFFFFH
t SETUP ONE'S PATTERN I N AX
STe
C8:
NOV
DS,AX
NOV
8X,DS
NOV
ES,BX
I WRITE PATTERN TO ALL REGS
NOV
eX,ES
NOV NOV
SS,CX OX,SS
NOV
SP,OX
NOV
BP,SP
NOV
SI,SP
MOV
DI,SI
JNe
e9
TSTIA
XOR JNZ eLe
AX,DI ERROl
PATTERN t.4AKE IT THRU ALL REGS NO - GO TO ERR ROUT I NE
JM.
e,
C9:
TSTIA
OR
AX,OI
ZERO PATTERN MAKE IT THAU?
JZ
elO
1 YES - GO TO NEXT TEST
ERROl: HLT
; ---------- ---------- ---- --- ------------
I
HALT
SYSTEM
;
ROS CHECKSUh4 TEST I
; DESCRIPTION
A CHECKSUM I S DONE FOR THE 8K
ROS MODULE CONTA I N I NG POD AND
~
810S. ~~;----------
-------------
---
----------
Cll :
OUT OUT MOV OUT INC MOV OUT NOV OUT NOV
OAOH,AL 83H ,AL DX,3DSH DX,;'L AL DL,OB8H DX.AL AL,89H eND PORT, AL AL,Tol0010lB
PORT_B,AL
MOV OUT MOV MOV MOV
eLD ASSUME NOV NOV J". JNE
AL,OIH PORT_A,AL AX,es SS,AX DS,AX
SS:CODE BX.OOOOOH SP,OFFSET CI ROS CHECKSUM ERROl
ZERO IN AL ALREADY 01 SABLE NMI INTERRUPTS INITIALZE OMA PAGE REG
I o I SABLE COLOR VIDEO
I DISABLE BIW VIDEO,EN HIGH RES I SET 8255 FOR B,A.OUT, C.IN
I ENABLE PAR I TY CHECKERS AND
I PULL KB CLOCK LOW, TRI-STATE I KEYBOARD INPUTS,ENABLE HIGH I 8ANK OF SWITCHES-:>PORT C10-31 I <><> <><><1;><1;> <><><1;> <1;> <1;> <>
I <><><>CHECKPOI NT 1<><><>
I SETUP 55 SEc;. REG
SET UP DATA SEG TO POINT TO ROM AOORESS
SET DIRECTION FLAG TO INC.
SETUP START I NG ROS ADDR SETUP RETURN ADDRESS
I HALT SYSTEM IF ERROR
i~' s
POST (01/10/86) 5-85
IBM Pe,..o"el Comput.e,. MACRO Assemble,. Ve,..lo" 2.00 POST ----- 01/10/86 SYSTEM POST AND 810S PROCEDURES
'-3
01-10-86
228
22' 230
231 232 233 23. 235 23. 237 238 23. 2.0 241 0007 BO 02 242 0009 E6 60
243 0008 80 04 244 0000 E6 08 2.5 2·· 2.7 248 OOaF BO 54 249 OOEI E6 43
250 OOE3 81. C 1 251 ODES E6 41
.0 252 00E7
253 00E7 BO 254 00E9 E6 ..3
255 00E8 80 F8 FF 256 OOEE H 07 257 OOFO E4 "I 258 00F2 01. 08
259 OOF.. E2 F I 260 OOF6 F.. 261 OOFT
262 00F7 81. C3
263 00F9 28 C9 264 00F8 E6 41 265 OOFO 266 OOFO 80 40 267 COFF E6 43 268 0101 90 269 0102 90 270 0 I 03 E4 41
27 I 0105 22 08 272 0107 H 03 273 0109 E2 F2 214 0108 F4 275 27. 277 278 OIOC BO 03 279 0 I OE E6 60
280 281 0110 E6 00 282 283 28. 285 0112 80 FF
a 286 1 14 81. 08
287 0116 81. F8
288 0118 89 0008 289 011881. 0000 29001lEEE 291 OIlF 50 292 0120 EE 293 0121 BO 01 294 0123 EC 295 012.. 81. EO 296 0126 EC 297 0127 3B 08 298 0129 H 01 299 012B
300 0128 F4 301 012C
302 012C 42 303 0120 F9 304 012E E2 EE 305 0130 73 F9
306 0132 FE CO 307 0134 74 DE
308
30' 310 311 0136 8E DB 312 0138 8E C3
313 314 0131. BO FF 315 013C E6 01 316 013E 50 317 013F E6 01
318 0141 BO 58 319 0143 E6 08 320 0145 BO 00 321 0147 8A E8 322 0149 E6 08 323 014B 50 324 014C E6 01.
325 014E BO 12 326 0150 E6 41
327 0152 BO -it
328 015" E6 OB 329 0156 50 330 0157 E4 08 331 0159 24 10
332 0158 74 01 333 0150 F4 334 015E BO 42 335 0160 E6 OB 336 0162 BO 43
337 0164 E6 OB
PAGE
;-------------------------------------------------------
I
8237 DMA INITIALIZATION CHANNEL REGISTER TEST I
; DESCRIPTION
;
0lSA8LE THE 8237 OMA CONTROLLER. VERIFY THAT
;
TIMER I FUNCTIONS OK. WRITE/READ THE CURRENT
;
ADDRESS AND WORD COUNT REGISTERS FOR ALL
CHANNELS. INITIALIZE AND START OMA FOR MEMORY
- ; - - - - - --R--E-F-R-E-S-H-. - - --------- - - - -- - - - - ----------------- - -
; - - - - - 0 I SABLE OMA CONTROLLER
MOV OUT MOV
OUT
AL,02H PORT A,AL AL,O": OMAOS ,AL
, <><><><><><><><><><><><> I <><><>CHECKPO I NT 2<><><> I D I SABLE OMA CONTROLLER
;----- VERIFY THAT TIMER I FUNCTIONS OK
C12: C13:
"OV OUT "OV OUT
MOV OUT CMP ..JE IN OR LOOP HLT
MOV SUB OUT
MOV OUT Nap NOP IN ANa ../Z LOOP HLT
AL,54H TIMER+3,AL AL,CL TIMER+I,AL
AL."OH TlMER+3,AL BL,OFFH CI3 AL,TIMER+I BL,AL CI2
AL,BL CX,CX TIMER+I,AL
AL,40H TIMER+3,AL
AL,TlMER+1 BL,AL CI5 CI ..
I SEL T t MER I,LSB,MODE 2
I SET INITIAL TIMER CNT TO 0
TIMERI BITS ON LATCH TIMER-I COUNT
YES - SEE IF ALL BITS GO OFF TIMER I BITS OFF READ TTMER T COUNT ALL BITS ON IN TIMER TIMERI BITS ON
TIMER T FAILURE, HALT SYS
TIMER I BITS OFF SET TIGER '-CNT
TIMER LOOP LATCH-TIMER I COUNT
I DELAY FOR TI MER
I REAO T I MER I COUNT
I WRAP DMA REG , TIME" LoOP I HALT SYSTEM
;----- INITIALIZE TIMER I TO REFRESH MEMORY
CI51
MOV OUT
OUT
AL,03H PORT_A,AL
OMA ... ODH,AL
I <><><><><><><><><><><><> I <><><>CI£CKPO I NT 3<><><> I WRAP_DMA_REG ; SEND MASTER CLEAR TO aMI.
,----- WRAP aMI. CHANNELS ADDRESS AND COUNT REGISTERS
CI6t CI7t
CI7A: CIlII
"OV NOV NOV NOV NOV OUT PUSH OUT MOV IN MOV IN C"P "E
HL T
'NC STC LOOP "NC 'NC JZ
AL, OFFH BL,AL. BH,AL CX,6 OX,DMA DX,AL AX OX,AL AL,OIH AL,DX AH.AL AL,DX BX,AX C'8
ox
cn
CI7A
CAL,.
WR I TE PATTERN FF TO ALL REGS SAVE PATTERN FOR COMPARE
SETUP LOOP CNT
SETUP I f a PORT AODR OF REG
WRITE PATTERN TO REG, LSB SATISIFY 8237 1/0 TIMINGS MS8 OF 16 BIT REG AL TO ANOTHER PAT 8EFORE RD READ 16-BIT 0"11. CH REG, LSB SAVE LSB OF 16-BIT REG READ MSB OF aMI. CH REG PATTERN REAO AS WR I TTEN? YES - CHECK NEXT REG
NO - HALT THE SYSTEM NXT OMA CH SET-lID-PORT TO NEXT CH REG
I WR I TE PATTERN TO NEXT REG I F CARRY NOT SET HALT SYSTEM SET PATTERN TO 0 WR I TE TO CHANNEL REGS
INITIALIZE AND START OMA FOR MEMORY REFRESH.
CI6CI
MOV MOV ASSUME
"OV OUT PUSH
OUT MOV
OUT
"OV "OV OUT PUSH OUT
"OV OUT MOV
OUT PUSH
AIN,.,
JZ HLT MOV
OUT
MOV
OUT
OS,BX ES,BX DSt ABSO, ES: A8S0 AL,OFFH DMA+I,AL AX DMA+I,AL AL,058H DMA+08H,AL AL,O CH,AL DMA ... e,AL AX DMA"'\O,AL AL,I8 TIMER+I,AL
AL,"IH OMA+OBH,AL AX AL,OMA+08 AL,OOOIOOOOB CI8C
AL.42H OMA+08H,AL AL,"3H DMA+OBH,AL
; SET UP ABSO I NTO as ANa ES
I SET CNT OF 64K FOR REFRESH
SET OMA MODE, CH 0, RD. ,AUOT INT WR I TE OMA MODE REG ENABLE OMA CONTROLLER SET COUNT HIGH_OO SETUP DMA COMMAND REG
ENABLE aMI. CH 0 START TIMER I
J SET MODE FOR CHANNEL I
GET OMA STATUS IS TIMER REQUEST THERE? (IT SHOlA.O'T BEl HALT SYS. (HOT TIMER I OUTPUT) SET MODE FOR CHANNEL 2
I SET MOOE FOR CHA~EL 3
5-86 POST (01/10/86)
IB'" Personal Computer "'ACRO Assembler Version 2.00
1-4
POST ----- 01/10/66
.....8
340 341
SYSTE'" POST AND 810S PROCEDURES
01-10-86
P;A-G-E------------------------------- --------------
;
8ASE 64K READ/WRITE STORAGE TEST
; DESCRIPTION
342
WRITE/READ/VERIFY DATA PATTERNS
343 344
'3445.
341 0166 AD
346 0167 AD
AA,55,FF,OI, AND 00 TO 1ST 6-4K OF
;
--------S-TO--R-A-G-E-. --V-E-R-IF-Y-
-
------ ------- STORAGE ADDRESSA81L1TY.
--
---- - - -
-
-
1
LODSW LODSW
, ALLOW RA'" CHARGE T I ME.
349 0166 AD
LOOSW
350 0169 AD
LODSW
351
352
-- DETER"'INE h4EMORY SIZE AND FILL h4Eh40RY WITH DATA
353
354 0161.. 68 IE 0472 R 355 016E 68 2E 0496 R
MOV MOV
~~:g:~~-:g:gl:~~S~~A~L;~~~~!:6~] I I S~~~EK~~~~~~5F~~~~ IN 8X
356 357 358 359
0112 B9 6000 011561 F8 1234 011914 16 011B BC 0018 R
MOV
CMP JE MOV
CX, 0800'OH
-
8X.123-4H
CLR STG
SP. OFFSET C2
- I SET FOR 32K WORDS 1 WARh4 START?
360 361 362 363 364 365 366 367 368 369
ailE E9 OCCF R 0161 14 12 01113 IIA Oil 0185 80 04 0167 E6 60
a I 89 28 C9
0188 E2 FE
0180 86 08 018F E8 F6 0191
JMP
C24:
..JE
MOV
MOV
C24A: OUT
SUB
C248: LOOP
XCHG
JMP
CLR STGz
STGTST CNT HOW 81G BL,AL AL,04H PORT A ,AL cX,ci C2-48 BL,AL C24A
I STORAGE OK, DETER'" I NE SIZE I SAVE FAILING BIT PATTERN I <><><><><><><><><><><><> ; <><><>CHECKPO I NT 4<><><> I 8ASE Rio", FA I LURE - HANG
I FLIPPING 8ETWEEN 04 AND I FAILING BIT PATTERN
310 311 312
0191 28 CO 0193 F3/ A8 0195
-
SU8
REP HOW 81G;
AX,AX STOSW
I MAKE AX .. OOOO I STORE 32K WORDS OF 0000
313 0195 89 IE 0472 R 314 019983 FD 10
-
MOV
eMP
~~~~B~ORD[.RESETJLAG-OA~A~~IT~~ KBX aITIT~~S~~~~ ~~~E~N~LAG
315 376 377
019C 14 02 019E 28 ED 011..0
C.2-4CI
JE SUB
C24C BP,BP
; IF NOT THEN THIS MUST BE A P.O.R. ; IF P.O.R. THEN INITIALIZE THIS TO ZERO
318 379 380 381 362
011..0 69 2E 0496 R 0lA4 28 ED
a I 1.6 81.. 0400
011.9 8B 0010
OIAC
MOV SUB MOV MOV FILL LOOP:
~~~~pWOROI.KB_FLAG_3-DAT~-4~~, ~~ ~s~gS~~~~RR~~E!NF~~~OR I NO I CATOR
DX,0400H 8X. Ito
J SET PO I NTER TO ..JUST> I tlKB J BASIC COUNT OF 16K
383 384 385 386 387 388 389
390 391 392 393 394 395 396 397 398
OIAC 8E C2 OIAE 28 FF 0180 88 AA55
0183 88 CII 0lB5 261 89 05 0lB8 BO OF alBA 26: 68 05 OIBD 33 CI 018F 15 II OICI 89 2000 0lC4 F31 1..8 01C6 61 C2 0400
01CA 113 C3 10 01 CD 80 FE 1..0 0100 75 DA 0102
-
h40V
SUB MOV
MOV
MOV
MOV
MOV
XOR JNZ MOV
REP AOO ADD
CMP JNZ HOW BIG END:
ES,DX 01,01 AX,OAA55H CX,AX
ESIIDII,AX AL,OFH AX,ESI(DJ I AX,CX HOW BIG END cX,ZOOOH STOSW DX,400H aX,I6 OH,OAOH FILL_LOOP
I SET SEG. REG.
I TEST PATTERN J SAVE PATTERN J SEND PATTERN TO MEM. ; PUT SOh4ETHING IN AL J GET PATTERN I COh4PARE PATTERNS I GO END I F NO COMPARE I SET COUNT FOR 8K WORDS I FILL 8K WORDS I POINT TO NEXT 16KB BLOCK I BU"'P COUNT BY 16KB J TOP OF RAh4 AREA YET? ~ 1.0000 I
399 0102 89 IE 0413 R 400
-
-h40V
; SAVE MEMORY SIZE
401
SETUP STACK SEG AND SP
402
403 0 I 06 88 0030
MOV
AX,STACK SS
I GET STACK VALUE
404 0109 8E 00
"'Ov
SS ,AX -
; SET THE STACK UP
405 40. 407 406 409 410 41 I 412 413 41-4 -415 416 411
0108 8C 0100
01 DE 80 13 OlEO E6 20 01E2 BO 08 0lE4 E6 21 01E6 80 09 0lE8 E6 21 OlEA 80 FF 01EC E6 21
;
--------M-O-V------S-P-, TO-S-
-------------------I --S-T-A-CK-
-
I
-
S
-
READY
------
TO
GO
--- ;
;
--
----
-
-IN--IT-I-A-L--IZ-E-
-
THE
---
-8-2-
59
--
-
-- --- INTERRUPT
---
CO- -N-T-R-O-LL-E-R--C--H-IP----
C25;
MOV
AL,I3H
; ICW1 - EDGE, SNGL, ICW4
OUT
lNTAQO,AL
MOV
AL,8
I SETUP ICWZ - INT TYPE 8 18-FI
OUT
INTA01,AL
MOV
AL, 9
I SETUP I CW-4 - BUFFRo. 80116 MODE
OUT
INTAOI,AL
"'OV
AL, OFFH
MASK ALL I NTS. OFF
OUT
INTAOt ,AL
(VIDEO ROUTINE ENABLES INTS.I
41.
SET UP THE INTERRUPT VECTORS TO TEMP INTERRUPT
41.
-420 01EE IE 421 OIEF 89 0020
PUSH MoV
OS CX,32
I FILL ALL 32 INTERRUPTS
-422 -423 -42-4 425
01 F2 28 FF 0lF4 8E C1 0lF6 B8 IF23 R OlF9 A8
SUB
01,01
MOV
ES,OI
03.
MoV
AX,OFFSET 011
STasw
I FIRST INTERRUPT LOCATION I SET ES=OOOO ALSO I MOVE AOOR OF I NTR PAOC TO T8L
426 OIFA 8C C8 421 OIFC AB
MoV STOSW
AX,CS
I GET AooR OF I NTR PROC SEG
428 OIFo E2 F7
LOOP
D3
I VECTBLO
42'
430 431
;----- ESTABLISH BIOS SUBROUTINE CALL INTERRUPT VECTORS
-432 OIFF 8F 00-40 R
MOV
01 ,OFFSET OVIOEO_INT
I SETUP ADDR TO INTR AREA
-433 0202 OE
PUSH
CS
-43-4 0203 IF -435 0204 8E I F03 R
POP MOV
OS
I SETUP ADDR OF VECTOR TA8LE
51 ,OFFSET VECTOR TABLE+16
; START WITH VIDEO ENTRY
-436 020789 0010
MOV
eX,I6
-431 -438 439 440
'"442
443
020A A5 020B 41 020C 41 0200 E2 F8
03A:
h40VSW
I MOVE VECTOR TABLE TO RAM
INC
01
I SKIP SEGMENT POINTER
INC
01
;
-
-
-----
--LOOP
--
-
---
olA
---
-
-
-
---------
-
-
-
------
--
-
-
-
-
-
-
;
oETERh4lNE CONFIGURATION AND MFG. h400E
444
445
-4-46 -4-41 -448 449 450 451
020F IF
0210 IE 0211 E4 62 021324 OF 0215 81. EO 0217 80 AD 0219 E6 61
POP PUSH IN AND MOV MOV
OUT
OS 05
~~:~~~~T71IB
AH,AL AL,IOIOIIOIB
PORT_B,AL
I RECOVER DATA SEC ; GET SWITCH INFO I ISOLATE 5WI TCHES I SAVE I ENABLE OTHER BANK OF SWS.
POST (01/10/86) 5-87
IBM Personal COlllputer MACRO Asse,"bLer Version 2.00 POST ----- 01/10/86 SYSTEM POST AND 8105 PROCEDURES
1-5 01-10-86
452 453 454 455 456 451 458 459 460 461 462 463 464 465 466 461 468 469 410 411 412 413 414 475 416 411 418 419 480 48! 482
..,483
4.4 4.5 4.6
4 ·· ··9 490 491 492 493 494 495 496 491 498 499 500 501 502 503 504 505 506 501 50. 509 510 511 512 513 514 515 516 511 518 519 520 521 522 523 524 525 526 521 528 529 530 531 532 533 534 535 536 531 538 539 540 541 542 543 544 545 546 541 548 549 550 551 552 553 554 555 556 551 55. 559 560 56 I 562 563 564 565
0218 90 02 I C E4 62 021E 81 04 0220 02 CO 0222 24 FO 0224 OA C4 0226 2A E4 0228 A3 0410 R 0228 80 99 0220 E6 63 OZ2~ E8 19E3 R 0232 80 ~B EA 0235 15 08 0231 C6 06 0496 RIO 023C E8 22 90
023~
023F 80 ~B AA 0242 14 IC 02 ...... 80 FB 65 0241 15 03 0249 E9 0021 R 024C 024C OA DB 024E 15 10 0250 80 38 0252 E6 6 t 0254 90 0255 90 0256 E4 60 0258 24 FF 025A 15 04 025e ~E 06 0412 R
0260 0260 AI 04 lOR 0263 50 0264 80 30 0266 A3 0410 R 0269 2A E4 026B CO 10 0260 80 20 026F A3 0410 R 0212 2A E4 0214 CD 10 0216 58 0211 A3 0410 R
021A 24 30 021C 15 OA 021E B~ 0040 R
0281 Cl as IF49 R
0285 E9 033B R 0288 0288 3C 30 028A 14 08 028e FE C4 028E 3C 20 0290 15 02 029Z B4 03 0294 86 EO 0296 50 0291 2A E4 0299 CD 10 029B 58 029C 50 029D BB BOOO 02AO EB 24
02C3 02e3 02C3 E9 185C R
02C6 02C6 8A 03B8 02C9 89 0800
ozec eo 01
02CE 80 Fe 30 02DI 14 09 02D3 81 88 0205 BA 03D8 0208 B5 20 02DA ~E e8 02DC 02DC EE 0200 81 3E 0412 R 1234 02E3 8E C3 02E5 14 01 02El 8E DB
02E9 E8 oeCF R 02EC 15 33
02EE 02EE 58 02E~ 50
Nap
KBXl :
IN MaY ROL AND OR SUB MOY
MOY OUT CALL CMP JNE MaY
JMP
AL,PORT e CL,4
AL,CL
I ROTATE TO HIGH NI88LE
AL. I I t 100008
; ISOLATE
AL,AH
, COMB I NE WITH OTHER 8ANK
AH,AH
DA TA_WORD( IIEQU II~_FLAG-DATA40] · AX
I SAVE SWITCH
AL,99H
INFO
CMD PORT .AL
KBD-RESET
I SEE IF MFG. ,JUMPER IN
BL, OEAH
; 1S TH 1S THE EXTENDED KEYBOARD?
K8X I
; I F NOT THEN LEAVE THE FLAG ALONE
~:T A_AREA [IIK8JLAG_ 3-DAT~4g!N~B~ I T~ ~~~~~~~g ~~~~ARO
038:
CMP JE CMP JNE
J"P
BL,OAAH EO BL,065H 038 MFG_BOOT
KEYBOARD PRESENT? I LOAD M~G, TEST REQUEST? I GO TO 800TSTRAP I F SO
OR JNZ MOV OUT Nap
8L,8L E6 AL,38H PORT_8,AL
MFG PLUG IN? NO
NOP IN AND JNZ INC
AL,PORT A
AL,OFFH-
I WAS
E6
DATA_AREAIIIM~G_TST-DATA40J
DATA LINE GROUNDED I SET MANUFACTURING
TEST
~LAG
;- ---------- -------------------- ------------ ------ - -----
;
INITIALIZE AND START CRT CONTROLLER (6845)
;
TEST VIDEO READ/WRITE STORAGE.
; DESCRIPTION
,
RESET THE VIDEO ENA8LE SIGNAL.
SELECT ALPHANUMERIC MODE, 40 · 25, 8 & W.
READ/WRITE DATA PATTERNS TO STG. CHECK STG
ADDRESSA81 L I TY ·
~~:ER-R-O-R---=--I
-
--LONG
--
--AND
--
-
2
-
--SH-O--R-T-B-E-E-P-S-
--
-
-
-
--
-
-
----
---
----
-
-
"OV PUSH
:~' OAT A_WORD[ IIEQU I P_~LAG;D~!~~O 'T
I GET SENSE SWITCH INFO
MOY
AL,30H
"OY
OATA_WORD(.EQUIPJLAG-DATA40) ,AX
SUB
AH,AH
INT "OY
10H AL,20H
I SEND INIT TO 8/W CARD
"OY
DATA_WORO[IIEQUIP_FLAG-DATA40]. AX
SUB INT
AH,AH lOH
, AND INIT COLOR CARD
POP MOV
AX
, RECOVER REAL SI I TCM INFO
DATA_WORD[IIEQUIP_FLAG-DATA40] ,AX
I RESTORE IT
; AND CaNT I NUE
'NO
AL,30H
I ISOLATE VIDEO SWS
JNZ
E7
I VIDEO SWS SET TO O?
MaY MOY
~~RgF~~~T [;~I~~~F~~i DUM~Y~~~T~~~ 10104 TO ID~~~Y IF NO V IDEO CARD
E7:
JMP
EI8 1 -
; 8YPASS VIDEO TEST , TEST VIDEO:
CMP JE INC CMP
AL,30H E8 AH AL,20H
; a/w CARD ATTACHED? ; YES - SET MODE ~OR B/W CARD
SET COLOR MODE FOR COLOR CO 80X25 MODE SELECTED?
JNE
E8
"OY
AH,3
E8:
xeHG
AH,AL
PUSH
AX
SU8
AH,AH
INT
10H
POP
AX
PUSH
AX
MDY
BX,08000H
JMP
SHORT E8A
NO - SET MODE FOR 40X25 SET MODE ~OR 80X25 SET MODEl SAVE VIDEO MODE ON STACK
INITIALIZE TO ALPHANUMERIC MD CALL VIDEO 10
RESTORE VIt;EO SENSE SWS IN AH RES AVE VALUE 8EG VIDEO RAM ADDR 8/W CD
;----- UNNATURAL ACT ~OR ADDRESS CDWPATIBILITY
ORG
ORG
NWI INT:
-
...IMP
OE2C3H 002C3H
NWI_INT_I
E8A: E9:
MOY MOY MOY CMP JE MOY "OY MaY DEC
OUT CMP MOY JE "OY ASSUME CALL JNE
OX ,388H CX,2048
MODE REG FOR B/W RAM WORD CNT FOR 8/W CD
AL,l AH,30H E9 8H,OB8H OX,3D8H
SET MODE FOR 8W CARD 8/W VIDEO CARD ATTACHED? YES - GO TEST VIDEO STG BEG V IDEO RAM AODR COLOR CD MODE REG FOR COLOR CD
CH,20H AL
RAM WORD CNT ~OR COLOR CO SET MODE TO 0 FOR COLOR CD
TEST V IDEO STGt
DX,AL
I DISABLE vl15ED FOR COLOR CD
DATA_WDRD(.RESET_FLAG-DATA40I,1234H I POD INIT 8'1' KaD RESET?
ES,ax
I POINT ES TO VIDEO RAM STG
E I 0
I YES - SK I P V IDEO RAM TEST
OS,8X
I POINT OS TO VIDEO RAM STG
OS I NOTH 1NG,ESINOTHING
STGTST CNT
I GO TEST VIDEO R/W STG
EI7 -
I R/W STG FAILURE - 8EEP SPK
I
SETUP VIDEO DATA ON SCREEN FOR VIDEO
I
LINE TEST.
; DESCRIPTION
ENABLE V IDEO S I GNAt. AND SET MODE.
;
-
-
-
-
-
--D--I -S-P-LA-Y-
-A--H--O-R
I
-
Z-O-N-T-A--_-B-A-R--O--N--S-C-R-E-E-N-. -----
I
EIO:
POP
AX
PUSH
AX
I GET V IDEO SENSE SWS I AH) ; SAVE IT
5-88 POST (01/10/86)
IBM Personal Co,"put.er MACRO Asse,"bler Version 2.00 POST ----- 01/10156 SYSTEM POST AND 810S PROCEOURES
1-'
01-10-66
566 567 568
02FO 84 00 02F2 CD 10 02F4 88 7020
5'9 570 02F7 2B FF 571 02F9 89 0028 572 02FC F'3/ AB 573 574 575 57. 577 57. 579 580 02FE 58 581 02FF 50
582 0300 80 FC 30 583 0303 8A 03BA 584 0306 H 03 585 0308 BA 03DA 586 0308
557 030B B4 08 588 0300 589 0300 2B C9 590 030F
591 030F EC 592 0310 22 C4 593 0312 75 04 594 0314 E2 F9 595 0316 E8 09
596 0318 597 0318 28 C9 598 031A 599 031 A EC
600 031B 22 C4 601 0310 74 II 602 031F E2 F9
603 0321 604 0321 IF 605 0322 IE 606 0323 Cb Ob 0015 R 06 607 0328 BA 0 I 02
608 0328 E8 '9A5 R 609 032E E8 06 bl0 0330 61103308103 612 0332 02 EC
613 0334 75 07 614 0336 615 0336 58
616 0337 84 00 61 7 0339 CO 10 618 0338 619 0338 SA COOO 620 033E 621 033E 8E OA
622 0340 28 08 623 0342 88 07 624 0344 53 625 0345 58
626 0346 30 AA55 627 0349 75 05
628 0348 E6 1920 R 629 034E E8 04 630 0350 631 0350 61 C2 0080
632 0354 633 0354 61 FA C800 634 0356 7C E4
'35
.3..'337'
,.,.39
··0
.··.·,
644 035A 1F
...··5
"7 648 0358 G6 06 0415 R 05 ··9 .50 651 0360 80 00 652 0362 E6 21 653 0364 E4 21 654 0366 OA CO 655 0368 75 18 65b 036A 80 FF 657 036C E6 21 656 036E E4 21 659 0370 04 01 660 0372 75 11
.,·..·,·.··3
"5 666 667 668 669 610
611 672 613
614 675 616 617
678 679
0314 A2 046B R 0317 F8 0378 28 C9 037A 037A E2 FE
onc
037C E2 FE 037E 80 3E 046B R 00
0353 H 06 0365 0365 BE 16Ge R 0388 E8 1976 R
0388 FA 038C F4
MOV INT MOV
AH,O .OH AX,7020H
I ENABLE VIDEO AND SET MODE I VIDEO I WRT BL.ANKS I N REVERSE V IDEO
SUB
01,01
I SETUP STARTING L.OC
MOV
CX,40
I NO. OF BLANKS TO DISPL.AY
REP
STOSW
I WRITE VIDEO STORAGE
I - ----------- - - - - - - - - - - - - - - - - - - --- - - - - - -
;
CRT INTERFACE L.INES TEST
I
; DESCRIPTION
I
;
SENSE ON/OFF TRANSITION OF THE I
;
VIDEO ENABL.E AND HORIZONTAL
; ;
-
-
-
-
-
--
-S'-!'N-C--L-I-N-E--S-.--
----
---------------
Elll E12: E131
POP PUSH eMP NOV JE MOV
MOV
SUB
AX AX AH.30H DX,03BAH Ell DX,03DAH
AH,B
CX,CX
I GET VIDEO SENSE SW INFO SAVE IT
·I B/W CARD ATTACHED?
SETUP ADDR OF BW STATUS PORT
YES - GO TEST L.INES
·COLOR CARD I S ATTACHED
··· LlNE_TSTI
· OF LOOP _CNTI
'N AND
AL.,DX AL.,AH
READ CRT STATUS PORT CHECK VIDEO/HaRZ LINE
JNZ LOOP
E" EI3
I TS ON - CHECK IF I T GOES OFF L.OOP TIL.L. ON OR TIMEOUT
E14:
JMP
SHORT EI7
GO PR I NT ERROR MSG
SUB
CX,CX
IN
AL,DX
READ CRT STATUS PORT
AND
AL,AH
CHECK VIDEO/HORZ LINE
JZ
EI.
ITS ON - CHECK NEXT LINE
EIlI
LOOP POP
E>5 OS
L.OOP IF OFF TILL IT GOES ON CRT_ERR I
PUSH NOV NOV
OS
OS I OMFG_ERR_FL.AG , 06H DX,I02H
· <><><>CRT ERR CHKPT. 06<><><>
CAL.L.
ERR BEEP
I GO BEEP SPEAKER
Elb:
J .... NOV
SHORT EI8 CL. , 3
NXT L.INEl GET-NEXT 81 T TO CHECK
SHR
AH,CL.
E16:
JNZ
E ··
GO CHECK HOR I ZONT AL. L. I NE OISPL.AY CURSOR I
POP NOV
AX AH,O
GET V IDE'O SENSE SWS IAHI SET MODE AND 0 I SPLA '!' CURSOR
INT
10H
CAL.L. V IDEO I/O PROCEDURE
EI8_' :
EI8AI
NOV
MDV SUB MDV PUSH POP
DX,OCOOOH
DS,OX aX,ax
AX, [BX) BX
BX
·· SEE IF ADVANCED VIDEO CARD
I S PRESENT
·GET FIRST 2 LOCATIONS
L.ET BUS
SETTLE
eMP JNZ
AX,OAA~5H
EI68
PRESENT? NO? GO LOOK FOR OTHER MODUL.ES
CALL
ROM CHECK
GO SCAN MODUL.E
JMP
SHoFfT E IBC
EI6BI
EI6C:
ADD
DX.0080H
I POINT TO NEXT 2K 8LOCK
CMP
ox.ocaOOH
I TOP OF VIOEO ROM AREA YET?
;
--
---
---J
L-------
EleA
----
-
-
----------
-
-
-
-
-
~
---I -
G-O---SC-A-N--F-O-R--A-N-OTHER
MODULE
I
15259 INTERRUPT CONTROL.L.ER TEST
I
I DESCRIPTION
I
READ/WRITE THE INTERRUPT MASK REGISTER IIMR)
:
WITH ALL ONES AND ZEROES. ENABLE S'!'STEM
;
J NTERRUPTS. MASK DEV I CE I NTERRUPTS OFF. CHECK I
;
FOR HOT I NTERRUPTS I UNEXPECTED I ·
C211
ASSUME DS:ABSO
POP
OS
;----- TEST THE IMR RECIISTER
C2IA: MOv
MOV OUT IN DR JNZ MOV OUT
'N
ADD JNZ
DATA AREA[OMFG ERR FLAG-DATA40) .0eH
-
-
-
I <><><><><><><><><><><><>
I <><><>CHECKPO I NT 5<><><>
AL.,O
I SET 1MR TO ZERO
INTAO I ,AL
AL..INTAOI
D.AL.AL
AL,OFFH
READ IMR
IMR = O?
GO TO ERR ROUTINE IF NOT 0
o I SABLE DEV I CE INTERRUPTS
INTAOI,AL
WRITE TO IMR
AL.,INTAOI
READ IMR
AL.,I
AL.L. IMR BIT ON?
D.
NO - GO TO ERR ROUT 1NE
CHECK FOR HOT INTERRUPTS
;----- INTERRUPTS ARE MASKED OFF. CHECK THAT NO INTERRUPTS OCCUR ·
MOV
OATA_AREA[OINTR_FLACI-DATA40),AL I CL.EAR INTERRUPT FLAG
ST I
I ENABLE EXTERNAL INTERRUPTS
SUB
CX,CX
04:
I WAIT I SEC FOR ANY INTRS THAT
LOOP
D'
05,
I Ml GHT OCCUR
L.OOP
05
CMP
oATA_AREA(.INTRfLAG-DATA40),OOH
I ANY INTERRUPTS OCCUR?
JZ
07
06:
I NO - Cia TO NEXT TEST
MOV
SI,OFFSET EO
I DISPLAY 101 ERROR
CAL.L. eLi
E_MSG
HLT
I HAL.T THE SYSTEM
POST (01/10/86) 5-89
IBM Personal Compute,. MACRO Asselllbler Version 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-7 01-10-86
680 681
P ;
A-C--E
-
-
-
--
-
----------
---
-
------------
-
-
-
-
--
-
-
---------
-
-
-
682
,
8253 TIMER CHECKOUT
I
683
; DESCRIPTION
,
684 685
68. .87 0380 688 0380 C6 06 0.15 R 02
.8.··0
.., 0392 BO FE
I
VERIFY THAT THE SYSTEM TIMER (0) DOESN'T COUNT I
;
~;
~
-----T-O-O-
-
FA
--
S
-
T
-
-
OR
--
-T-O-O--
--SLO
-
W.
--
-
-
-
-
-
-
-
-------
--
-
-
--
-
-
-
--
--
MOV MOV
DATA AREA[.MFG ERR FLAG-DATA40],02H
-
-
-
I <><><><><><><><><><><><><><><><>
I <><><>TIMER CHECKPOINT (2)<><><>
AL,OFEH
I MASK ALL INTRS EXCEPT LVL 0
6'2
6'3 6.4
039. E6 2 T 0396 BO 10 0396 E6 .3
OUT Mav OUT
INTAOI,AL AL,OOOIOOOOB TIM CTL,AL
; WRITE THE 8259 lMR SEL TIM O. LSB, MODE 0, 81NARY WR ITE TIMER CONTROL MODE REG
6'5 039A B9 0016
Mav
CX,16H
SET PGM LOOP CNT
6 ·· 0390 6A C 1
MOV
AL.CL
SET TIMER 0 CNT REG
.·'·8··· 7
039F E6 40 03Al 03Al F6 06 0.6B R 01
700
08:
OUT TEST
TI MERO ,AL
WR I TE TJ MER 0 CNT REG
OATA_AREA[.INTR_FLAG-OAT~·gIDo~7MER 0 INTERRUPT OCCUR?
701 702 703 70.
03A6 75 O. 03A6 E2 F7 03AA EB 09 03AC
"NZ
D9
LOOP
06
09:
""P
06
I YES - CHECK TIMER OP FOR SLOW TIME
I WAIT FOR INTR FOR SPECIFIED TIME I TJ MER 0 I NTR 01 ON' T OCCUR - ERR
705 03AC BlOC
MOV
CL. 12
SET PGM LOOP CNT
706 707
708 70.
03AE 80 FF 03BO E6 .0 0382 C6 06 046B R 00 03B7 BO FE
MOV OUT MOV MOV
AL. OFFH
WR I TE T I MER 0 CNT REG
TlMERO,AL
, a o A T A _ A R E A [ . I N T R _ F L A G - o A T A 4 0 J
I RESET INTR RECEIVED FLAG
AL, OFEH
a I REENABLE TItER I NTERRUTS
710 03B9 E6 21
OUT
INTA01,AL
711 0388
0101
712 0388 F6 06 046B R
TEST
DATA AREA[.INTR FLAG-DATA.OJ ,OIH
I TIMER 0 INTERRUPT OCCUR?
713 03CO 75 C3
,JNZ
06 -
-
1 YES - TIMER CNTlNG TOO FAST, ERR
71' 03C2 E2 F7 715
LOOP
010
I WAIT FOR INTR FOR SPECIFIED TIME
716
;----- SETUP TIMER 0 TO MODE 3
717
718 03C4 80 FF
71. 03C6 E6 21
"av OUT
AL.OFFH INTA01,AL
I 0 I SABLE ALL OEV I CE INTERRUPTS
720 03C6 BO 36 721 03CA E6 43
"OV OUT
"l,36H TIMER+3,AL
SEL TIM O,LSB,MSB,MODE 3
WR I TE T I MER MODE REG
722 03CC BO 00 723 03CE E6 40 724 0300 E6 40
MaV OUT OUT
ALtO
TlMER.AL TI MER ,AL.
WR I TE LSB TO TIMER 0 REG
WRITE MSB TO TIMER 0 REG
725
726
,
KEYBOARD TEST
727
; oESCR I PTI ON
:
728
RESET THE KEYBOARD AND CHECK THAT SCAN I
72' 730
CODE · AA' I S RETURNED TO THE CPU.
CHECK FOR STUCK KEYS.
731
732 0302
733 734 735
73. 737
738 73. 740
0302 BO 99 0304 E6 63
0306 AO 0410 R
0309 24 01 ()308 74 30
0300 60 3E 0412 R a I
03E2 7. 29 03E. E8 19E3 R
MaV OUT Mav
ANa
"Z
C"P "E CAL.L
AL,99H
I SET 8255 MODE A,e.IN 9:::0UT
CMo PORT tAL
~t: ~~TA_AREA [.EQU, P_FLAG;D~~~+OJHAM8ER 1
F7
I BYPASS IF SO
DATA AREA[.MFG TST-DATA401,l
I MANUFACTUR ING TEST MODE?
Fl -
-
I YES - SK I P KEYBOARD TEST
KBD RESET
; ISSUE RESET TO KEYBRo
741 03E7 E3 1E
,JCXZ
F6 -
PR INT ERR MSG IF NO INTERRUPT
,..742
743
,,,...75.
03E9 BO 49 03EB E6 61 03EO 60 FB AA 03FO 15 15
,.8
"OV OUT eMP
"NE
AL,49H PORT B,AL
BL,OAAH F6
; ----- CHECK FOR STUCK KEYS
ENABLE KEYBOARD
SCAN CODE AS EXPECTED?
NO - DISPLAY ERROR MSG
74' 750
751 752
03F2 80 ca 03F. E6 61 03F6 80 48 03Fa E6 61
"OV OUT Mav
OUT
AL ,oceH PORT S,AL
AL,48H PORT B,AL
I CLR KBD, SET elK LINE HIGH
ENA8LE KBO, CLK I N NEXT BYTE
753 03FA 2B C9
SUB
CX,CX
754 03FC
F5:
KBD WAIT,
755 756 757
03FC E2 FE 03FE E4 60 0.00 3C 00
'NLOOP
eMP
F5 AL.KB DATA AL.O -
DELAY FOR A WHILE
CHECK FOR STUCK KEYS
SCAN CODE .. 01
758 0402 14 09 75. 0404 E6 1958 R
"E CALL
F7 XPC_BYTE
YES - CONTINUE TESTING CONVERT AND PR INT
760 0407
F6:
761 0401 8E 098A R
MOV
S I ,OFFSET F 1
GET MSG AODR
762 040A E8 1976 R
7.3
---- _:~~~ ____ :::~:~ _____________________ ~~ ~~~_~SG ON SCREEN
;
7 ··
;
SETUP HARDWARE INT. VECTOR TABLE
7.5
766 0400
767 0400 IE
PUSH
OS
I SETUP_INT_TABLEI
768 040E 2B CO
SUB
AX,AX
7 ·· 0.'0 8E CO 770 0412 89 0008
"OV MOV
ES,AX
CX,08
GET VECTOR CNT
771 0415 OE 772 0416 IF
PUSH pap
CS
as
SETUP OS SEG REG
773 0.17 8E IEF3 R 774 041 A BF 0020 R
"av Mav
51 ,OFFSET VECTOR TABLE
01 ,OFFSET .INT_P'TR
775 0410
776 0410 AS
MOVSW
777 O.'E 47 778 O.lF 41
INC
01
INC
01
I SK I P OVER SEGMENT
77' 0420 E2 FB 780 0422 IF
LOOP POP
F7A
OS
781
782
SET UP OTHER INTERRUPTS AS NECESSARY
7.3
784 0423 C7 06 0008 R 02C3 R
MOV
785 786 787
0429 C7 06 0014 R IFS4 R 042F C7 06 0062 R F600 0435 Cl 06 007E R 0000
"av
Mav
Mav
788
78.
;----- SETUP TIMER 0 TO BLINK LED IF MANUFACTURING TEST MODE
7··
7" 043B 80 3E 0.12 R 01
7'2 0440 75 OA 7'3 0442 C7 06 0010 1909 R
CNP ,JNZ
MOV
DATA AREA[.MFG TST-DATA.OJ,OIH I MFG. TEST MODE?
EXP To
WORr) PTR os: [ICH·41,OFFSET BLINK_INT I SETUP TIMER TO BLINK L.EO
5-90 POST (01/10/86)
IBM P" .... lIon .. 1 Comput""" MACRO Ass"",bl.r Version 2.00 POST ----- 01/10/86 SYSTEM POST AND 810S PROCEDURES
1-6 01-10-86
..19..
,195
0-4-48 BO FE
0-4-4A E6 2 I
791 798 7 ·· 600
MOV
AL,OFEH
I ENABLE TIMER INTERRUPT
OUT
INTAOt,AL
1---------------- --- --------- -----------------------------------
EXPANSION 110 BOX TEST
CHECK TO SEE IF EXPANSION 80X PRESENT - IF INSTALLED,
TEST DATA AND ADDRESS BUSES TO 110 BOX
ERROR=' 1801'
6" 602
603
604
;----- DETERMINE IF BOX IS PRESENT
805 80& 807 808 809 810 8 I I 812 813 814 815 816 B17 BI8
61' 620 621 822 823 824 825 826 827 828 829 830 831 832 833 83-4
..,835
836 837
.8338'
.41 8"2 843 844 845 846 841 848 849 850 851 852 853 85-4 855 856 857 656 65' 650 651 652 653 654
044C O....C 8A 0210 O....F 88 5555 0-452 EE 0 ..53 80 0 I 0 ..55 EC 045& 3A C4 0458 15 43 045A F7 DO 045C EE 0450 BO 01 045F EC 04&0 3A C4 04&2 15 39
04&4 0464 BB 0001 04&7 BA 0215 046A 89 0010 0460 0460 2E= 8B 01 0410 90 0411 EC 0412 3A C1 0414 15 21 0416 42 0411 EC 0418 3A C3 041A 15 18 041C 4A 041D DI E3 041F E2 EC
0481 B9 0008 0484 80 0 I 0486 4A 0487 0487 8A EO 0489 EE 0-48A 80 01 048C EC 0480 3A C4 048F 75 06 0-491 DO EO 0493 E2 F2 0495 EB 06 0491 0491 BE 18DC R 049A E8 1916 R
"OV "OV OUT
"OV IN CMP JNE NOT
OUT MOV IN CMP JNE
oX,OZIOH AX,5555H oX.AL AL,OIH AL,OX AL,AH
EI' AX DX,AL AL,OIH AL,DX AL,AH
EI'
I ,CARD WAS ENA8LED EARLIER) I CONTROL PORT ADDRESS I SET DATA PATTERN
MAKE AL 0 I FFERENT RECOVER DATA REPL Y? NO RESPONSE, GO TO NEXT TEST MAKE DATA .. AAAA
I RECOVER DATA
; ----- CHECK ADDRESS 8US
EXP2: EXP3:
MOV MOV NOV
NOV NOP IN CNP JNE INC IN CNP JNE DEC sHL LOOP
8X, 000 1H DX,0215H CX,OOl6
CSI (BX).AL
AL,DX AL,BH EXP ERR oX AL,OX AL,BL EXP ERR DX BX,I EXP3
LOAD HI ADOR. REG ADDRESS GO ACROSS 16 8ITS ; WR I TE ADDRESS FOOOO+BX
I READ ADDR. HIGH
GO ERROR IF M I SCOMPARE DX=216H IADDR. LOW REG)
I COMPARE TO LOW ADDRESS I OX BACK TO 215H
I LOOP TILL ' I ' WALKS ACROSS BX
; ----- CHECK DATA BUS
MOV
CX,0008
I DO 8 TIMES
MOV
AL, 0 I
DEC
OX
EXP4:
I MAKE oX.,ZI4H (DATA 8US REGI
MOV
AH,AL
SAVE DATA BUS VALUE
OUT
OX,AL
SEND VALUE TO REG
MOV
AL,OIH
IN
AL,OX
RETR I VE VALUE FROM REG
CMP
AL,AH
II TO SAVED VALUE
JNE
SHORT EXP_ERR
sHL
AL,I
FORM NEW DATA PATTERN
LOOP
EXP4
LOOP TILL BIT WALKS ACROSS AL
JMP
SHORT EI9
GO ON TO NEXT TEST
EXP ERR:
-
t.40V
S (,OFFSET F3C
I
;
-
-
-
-
-
--
CALL
----
-
-
-
-E-_-M-S-G------------------------------------
;
ADDITIONAL READ/WRITE STORAGE TEST
; DESCRIPTION
;
WRITEIREAD DATA PATTERNS TO ANY READ/WRITE
STORAGE AFTER THE FIRST 6"K. STORAGE
;
ADDRESSABILITY IS CHECKED.
655
866 867 868 B69 B10 811 812
B13 81..
815 816
811 818 879 880 aa 1 882 883 88-4
885 88& 887 888
889 890 891 892 893
894 895 896 891
898 899 900 901 902 903
904 905
906 901
0490 0490 E8 IAI2 R 04AO 1E 04Al 04Al 81 3E 0072 R 1234 0-4A7 75 03 04A9 E9 054A R 0-4AC 04AC 88 00-40
04AF E8 28 0-481
0481 88 IE 0013 R 0485 83 E8 40 0488 81 04 0-4BA 03 EB 0-48C a8 CB 04BE BB 1000 04CI 04CI 8E DB
04C3 aE C3 04C5 al C3 0400 04C9 52 04CA 51
04CB 53 04CC 50 04CO B9 2000 04DO E8 OCCF R 04D3 Hi 4C
04D5 5B 04D6 05 00 I 0 0409 0409 50
04DA 8B OOOA 0400 B9 0003 04EO 04EO 33 02 04E2 F7 F3 04E4 80 CA 30
04E7 52 04E8 E2 F6
04EA B9 0003 04ED
E19:
ASSUME
E20:
CALL PUSH
CMP
JNE
E20A:
JNP
MOV
E20B:
JMP
MOV
SUB
MOV sHR
NOV
E21:
MOV
NOV
NOV
ADD PUSH PUSH PUSH PUSH MOV
CALL
JNZ
POP
ADD
PRT Sill
-
PUSH
MOV
MOV
DECIMAL LOOPI -XOR
OIV OR PUSH LOOP MOV
PRT_DEC_LOOP:
05:0ATA
DDS OS
.RESET FLAG, 1234H E20A -
ROM_SCAN
AX,64 SHORT PRT_SII
8X, .MEMORY S I IE
8X,64
-
CL,4
8X,CL
CX,8X
BX, 1000H
OS,BX ES,BX BX,0400H OX CX BX AX CX,02000H STGTST CNT E21A -
AX AX,I6
AX 8X,10 CX,3
DX,DX BX DL,30H
OX DEC (MAL LOOP CX,3
I WARM START? I CONT I NUE TEST I F NOT I GO TO NEXT ROUTINE IF SO
START I NG AMT. OF MEMORY OK POST MESSAGE
GET MEM. SIZE WORD 1ST 64K ALREADY DONE
DIVIDE 8Y 16 SAVE COUNT OF 16K 8LOCKS SET PTR. TO RAM SEGhlENT>64K
I SET SEG. REG
I PO I NT TO NEXT 16K
I SAVE WORK REGS
I SET COUNT FOR 81( WORDS
GO PR I NT ERROR RECovER TESTED MEM NUMBER
, SET UP FOR DEC I MAL CONVERT , OF 3 NIBBLES
DIVIDE BY 10 MAKE INTO ASCII SAVE
POST (01/10/86) 5-91
IBM Pel'"sonal ComputeI'" MACRO AssembleI'" Version 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-9
01-10-86.
908
909 910 91 I 91 2 913
914 915 916 917 9115 919 920 921 922 923 924 925
926 927 928 929 930 93\
932 933 934 935 93. 937 938 939 940 941 942 9~3 944 945 946 941
948
949 950 951 .52 953
95~
955 956 957 '58
.'95..,0'
''..32
964
965 966
961 968 969
910 911
'H2 913 914 915 916
911 9715 919 980
981
..8...'·.·32
98.
O~Eo 511 O~EE E8 1969 R O~Fl E2 FA 04F3 B9 0001 0~F6 BE 001 A R 04F9 04F9 2E. 8A 04 04FC 46 04Fo E8 1969 R 0500 E2 F7 0502 58 0503 3D 0040 0506 74 A9 0508 58 0509 59 050A 5A 050B E2 B4 0500 80 OA 050F E8 1969 R
0512 £4 08 0514 24 01 05 I 6 75 32 05 I 8 IF 0519 C6 06 0015 R 03 051E E9 0385 R
0521 eA E8 0523 BO 00 0525 E8 1969 R 05211 BO OA 052A E8 1969 R 0520 58 052E 83 C4 06 0531 8C DA 0533 IF 053~ IE 0535 A3 0013 R
053888360015 R
053C E8 OCBA R 053F 8A C5 0541 E8 1955 R 05~4 BE 180 I R 05~1 Ee 1976 R
054A 054A 8A C800
05~D
05~D 8E oA 05~F 28 08 0551 8B 07 0553 53 055~ 58 0555 3D AA55 0558 15 06 055A Ee 1920 R 0550 E8 05 90 0560 0560 81 C2 0080 0564 0564 8\ FA FOOD 0568 lC E3
.87 .88 · 89 990 056A
991 056A IF 992 0568 AD 00 lOR 993 056E 2~ 0 I 994 0510 74 5E 995 0572 996 0512 BA 03FI 991 0575 EC 998 0576 90 999 0571 BB FFFF 1000 051A 2~ F8 100 I 051C 80 26 D08F R FE 1002 0581 3C 50 1003 0583 15 05
1004 0585 80 DE 008F R 0 I 1005 058A 1006 058A E4 21 '001 OSBC 2~ 8F '008 058E E6 2' 1009 0590 B~ 00 1010 0592 8A 04 101 1 059~ CD 13 \ 0 12 0596 F6 C4 FF
1013 0599 15 19 1014 1015 1016
1011 0598 BA 03F2 1018 059E BO IC 1019 05AO EE 1020 05AI 28 C9 1021 05A3
POP
CALL
LOOP
MOV
MOV
KB LOOP:
-
MOV
INC
CALL
LOOP
POP
CMP
JE
POP
POP
POP
LOOP
MOV
CALL
AX PRT HEX PRT-OEC LOOP CX,l S I ,OFFSET F3B
AL,eS, [51] 51 PRT HEX K8 COOP AX
AX,64 E208
ax
CX
ox
E21 AL, 10
PRT_HEX
, RECOVER A NUMBER I PRINT' KB OK'
RECOVER WORK REGS FIRST PASS?
I LOOP TILL ALL MEM. CHECKED I LINE FEED
;----- OMA TCO SHOULD BE ON BY NOW - SEE IF IT IS
IN ANa JNZ POP MOV JMP
AL,DMA+08H AL, 0000000 18 ROM SCAN OS
;~FG_ERR_FLAG, 03H
TCO STATUS BIT ON" GO ON WITH NEXT TEST IF OK
<> <><><> <><><> <> <> <> <><><> POST 101 ERROR MSG AND HALT
,----- PRINT FAILING ADDRESS AND XOR'ED PATTERN IF DATA COMPARE ERROR
E2IA: MOV
CH,AL
SAVE FAILING BIT PATTERN
MOV
AL,CR
CARRAGE RETURN
CALL
PRT HEX
MOV
AL,[F
, LINE FEED
CALL
PRT_HEX
PDP
AX
RECovER AMT. OF GOOD MEM.
ADD MOV
SP,6 DX,DS
BALANCE STACK GET F A I LING SEGMENT
POP
as
PUSH
as
MOV
- CIIMEMORY S I I.e:, AX
LOAD MEM. S I I.E WORD TO SHOW HOW MUCH MEM. WORK I NG
MaV
CIIMFG_ERR_FLAG.DH
<> <><><><> <><><><><><><><>
<><>CHECKP01NTS 08->AO<><>
CALL MOV
PRT SEG AL,CH
PRINT IT GET FAILING BIT PATTERN
CALL
XPC BYTE
CONVERT AND PR I NT CODE
MOV
SI,(5FFSET El
SETUP ADDRESS OF ERROR MSG
- - - - CALL
E_MSG
PR I NT ERROR MSG
;-~~~~K -;o~ o;~ ~ ~~~~ ~OM-;~O~-~~~~o:;;ooo~ ~ ~ ~K-~~O~K; ---------
J
lA VALID MODULE HAS '55AA' IN THE FIRST 2 LOCATIONS,
LENGTH INDICATOR (LENGTH/512) IN THE 3D LOCATION AND
~O;-~~;~T~ -E-S-T-/-IN--IT--. -C--O-DE--S-T-A--R-T-IN-G---IN--T-H-E--4-T-H--L-O--C-A-T-IO--N-.)--- ----- ---
-
MOV
DX,OC800H
I SET 8EGINNING ADDRESS
ROM SCAN 1:
-
MOV
DS,OX
SUB
8X,BX
SET 8X,.QOOO
"OV PUSH
FOP
e. .
a,AX, [BX1
ax
AX,OAA55H
GET I ST WORD FROM MODULE
BUS SETTL 1NG ,. TO 10 WORD?
JNZ
NEXT ROM
PROCEED TO NEXT ROM I F NOT
CALL
ROM CHECK
GO CHECK OUT MODULE
JMP NEXT ROMI
ARE:WE_DONE
CHECK FOR END OF ROM SPACE
-
ADD
ARE WE DONE:
OX ,0080H
I PO I NT TO NEXT 12K ADDRESS
- - CMP
DX,OFOOOH
AT FOOOO YET?
______ ~: ______~~~=~~~~=~ ________________~~_ ~~:~~ _~~~~~~~_ ~~~: _~F NOT
DISKETTE ATTACHMENT TEST
DESCRIPTION
CHECK IF IPL DISKETTE DRIVE 15 ATTACHED TO SYSTEM. IF I
ATTACHED, VERIFY STATUS OF NEC FDC AFTER A RESET. ISSUE I
A RECAL AND SEEK CMD TO FOC AND CHECK STATUS. COMPLETE I
SYSTEM INITIALIZATION THEN PASS CONTROL TO Tt£ BOOT
- ~;:
---
-
-
LOA
---
DER
---
--PR-O-G-R-A-M--·
----------
-
-
-
---
-
-
-
- - - ------------------
FlO:
POP MOV ANa JZ
MOV IN Nap MOV ANa ANa eMP JNE OR
IN ANa OUT MOV MOV INT TEST JNZ
as AL,8YTE PTR ClEQUIP_FLAG AL,OtH FI5
DX,3FIH AL,DX
DISKETTE PRESENT? NO - BYPASS 0 I SKETTE TEST
DISK TESTI I.D.-PORT
8X,OFFFFH AL,OF8H ClHF_CNTRL,11111110B AL,CARD 10 NO 10 CIIHJ!'_ CNTRL. t
AL,INTAOI AL,OSFH INTAOI,AL AH,O DL.AH 13H AH,OFFH Fl3
8US PRECHARGE KEEP 1.0. 81TS RESET DUAL 81 T
I SET DUAL 81T
I ENABLE 0 I SKETTE INTERRUPTS
RESET NEC FDC SET FOR DRIVE 0 VERIFY STATUS AFTER RESET STATUS OK 1 NO - FDC FAILED
;----- TURN DRIVE 0 MOTOR ON
Ftl:
MOV MOV OUT sua
OX.03F2H AL,tCH DX,AL CX,CX
GET ADOR OF FDC CARD TURN MOTOR ON, EN OMA 1 I NT WR I TE FDC CONTROL REG
I MOTOR_WAITI
(20 \')
5-92 POST (01/10/86)
IBt.! P ... sonal Comput ... t.!ACRO Assemble.. Ve .. sion 2.00 POST ----- 01/10/66 SYSTEt.! POST ...NO BIOS PROCEOURES
1-' 0 01-10-66
1022 05 ... 3 E2 FE 1023 05A5 1024 05 ... 5 E2 FE 1025 05"'1 33 02 1026 05"'9 B5 22 1021 05 ...B 86 16 003E R 1028 05 ...F E8 0000 E 1029 05B2 13 05 1030 05B4 1031 05B4 BE 0990 R 1032 05B1 EB 02 1033 1034 1035 1036 05B9 1031 05B9 33 F6 1036 05BB 1039 05BB BO OC 1040 05BO B ... 03F2 1041 05CO EE 1042 1043
1044 1045 05C 1 E8 0000 E 1046 05C4 12 04 1041 05C6 OB F6 1048 05C8 14 06 1049 05CA 1050 05C'" BE 0990 R 1051 05CO E6 1916 R t 052 , 053
1054 1055 0500 t 056 0500 C6 06 006B R 00 1051 0505 BE OOIE R 1058 0506 69 36 00 , ... R 1059 050C 69 36 OOIC R 1060 05EO 69 36 0060 R 1061 05E4 83 C6 20 1062 05E1 69 36 0082 R 1063 05EB BF 0016 R 1064 05EE IE 1065 05EF 01 1066 05FO B6 1414 1061 05F3 ...B 1066 05F4 ...B 1069 05F5 B6 0101 1010 05F6 ...B 1011 05F9 ...B 1012 05F ... E4 21 1013 05FC 24 FC 1014 05FE E6 21 1015 1016 0600 63 FD 00 1011 1016 0603 14 18 1019 0605 B ... 0002 1060 0606 E6 19A5 R 1061 060B BE 0169 R 1062 060E E6 1991 R 10630611 10640611 B400 10650613 CD 16 1066 06 f 5 60 FC 3B 10810618 15 F1 1068 06 f A EB OE 90 10690610 1090061060 3E 0012 R 01 1091 0622 14 06 '092 0624 B ... 0001 1093 0621 E6 19 ... 5 R 1094 062A AO 0010 R 1095 0620 24 01 1096 062F 15 03 1091 0631 E9 005B R 1096 0634 2A E4 1099 0636 AO 0049 R
11000639 CD 10 1101 063B 1102 063B BD 1910 R 1103 063E BE 0000 11040641 1 105 0641 2E: 6B 56 00 I 106 0645 BO ...... 11010641 EE
1 106 0648 1E 1109 0649 EC 1 I 10 064A IF 1 1 I 1 064B 3C AA 1 I 12 0640 15 05 I I 13 064F 69 54 06 1114065246 1115065346 11 16 0654 I I 11 0654 45 1118 0655 45 1119065661 FD 1916 R
1120 065A 15 E5 1121 065C BB 0000 1122 065F B... 03F... 1123 0662 EC 1 124 0663 ... 6 F6 1125 0665 15 06 1126 0661 C1 01 03F6 1121 066B 43 I' 28 066C 43 1129 0660 1130 0660 BA 02FA 1131 0610 EC 1 132 0611 A6 F6 1133 0613 15 06 1134 0615 C1 01 02F8 1135061943
F12:
F13: ;-----
LOOP
FII
LOOP XOR MOV MOV C ... L L JNC
FI2 DX.DX CH,34 ClSEEK _STATUS.DL SEEK
Fl'
MOV
S I · OFFSET F3
JMP
SHORT FI4A
° TURN DR I VE MOTOR OFF
, W"'I T FOR 1 SECOND ; MOTOR_W ... ITII
; SELECT DR I VE 0 ; SELECT TR ...CK 34
RECALIBR... TE DISKETTE ...ND SEEK TO 34 OK--> GO TURN OF MOTOR 0' SKETTE ERROR GET ADDR OF MSG 01 SPL ...Y MESS ...GE ...FTER 0 I SKETTE SETUP
F14: FI4 ... :
XOR
MOV MOV OUT
SI.SI
AL .OCH DX,03F2H DX,AL
SEQUENCE END ENTRY I F NO ERROR ZERO S I I F NO ERROR SEQUENCE END ENTRY I F ERROR TURN DR I VE 0 MOTOR OFF FDC CTL ...DDRESS
;-----SETUP DISKETTE STATES
FI4B:
CALL DSKETTE SETUP
JC
FI4B
OR
SI.SI
JZ
FI5
MOV CALL
S I ,OFFSET F3 E_MSG
INITIALIZE DISKETTE PARMS C'I'-->D I SKETTE SETUP ERROR PREY 10US 0 I SKETTE ERROR NZ-->D I SKETTE ERROR BEFORE SETUP
GET "'DOR OF t.!SG GO PRINT ERROR MSG
;----- SETUP PRINTER AND RS232 BASE ADDRESSES IF DEVICE ... TT",CHED
F15:
MOV MOV MOV MOV MOV AOO MOV MOV PUSH POP MOV STOSW STOSW MOV STOSW STOSW IN ANa OUT
Cli NTR FLAG. OOH
, SET STR ... Y INTERRUPT FLAG = 00
S I · OFFSET IIKB BUFFER
, SETUP KEYBO...RD PARAt.!ETERS
IIBUFFER HE"'D,SI
ClBUFFER-T"'IL.S I
;~~~~ER:START ,S I
;DEFAULT BUFFER OF 32 BYTES
IIBUFFER END. S I
g~.OFFSET ClPRINT_TIM_OUT ,SET DEFAULT PRINTER TIMEOUT
ES AX,1414H
; DEF...UL T=20
AX,OIOIH
IRS232DEFAULT=01
AL,INTAOI "'L .OFCH INTAOI ....L
I ENABLE T I MER ...ND KB I NTS
CMP
JE
MOV
CALL
MOV
C ... L L
ERR_WAIT:
MOV
INT
CMP
JNE
JMP
FI5"'_0:
CMP
JE
MOV
FI5A:
C"'LL MOV
ANa
JNZ
JMP
FI5B:
SUB MOV
FI5C:
INT
MOV
MOV
FI61
MOV
MOV
OUT PUSH
IN
POP
CMP
JNE
MOV
INC
FI11
INC
INC
INC
CMP
JNE MOV
MOV
IN
TEST
JNZ MOV
INC
INC F18:
MOV
IN
TEST
JNZ
MOV
INC
BP,OOOO
° FI5A
DX.2ERR BEEP S I .OFFSET F3D P _MSG
CHECK FOR BPII' NON ZERO (ERROR H...PPENED) CONT I NUE I F NO ERROR 2 SHORT BEEPS (ERROR)
, LO...D ERROR MSG
"'H,OO 16H
AH.3BH ERR W... IT FI5A
I WAIT FOR 'FI' KEY I BYPASS ERROR
ClMFG TST. I FI5A-
DX,I
ERR BEEP
...L,BYTE PTR ClEQUIP FLAG
... L , O O O O O O O I B
-
FI5B
ST ...RT
...H ....H
"'L,ClCRT MODE
10H
-
t.!FG MODE BYPASS BEEP I SHORT BEEP (NO ERRORS)
GET SW ITCHES 'LOOP POST' SWITCH ON CONT I NUE WITH BR lNG-UP
CLE ...R SCREEN
BP.OFFSET F4
S 1.0
PRT B... SEI
DX.CSI [BPI
GET-PR I NTER BASE ADDR
...L.O ......H
WR I TE D...TA TO PORT A
DX ....L
as
BUS SETTLE I NG
a"'sL.DX
RE ...D PORT ...
AL,OAAH
I D... T ... P ...TTERN S...ME
F I 1
, NO - CHECK NEXT PRT CD
I~PR INTER_B... SE-DATA40 I [S: I i~~REM~N+E~O - N~~~R;O:~T BASE ... DDR
51
BP
I PO I NT TO NEXT B"'SE ...DDR
BP
BP,OFFSET F4E
",LL POSS I BLE ADDRS CHECKED?
FI6
PRT B ... SE
BX,O
POINTER TO RS232 TABLE
DX.3FAH
CHECK IF RS232 CD I ATTCH?
"'L.OX
RE ...D INTR 10 REG
"'L,OF8H
Fl.
~~RS232_BASE-DATA40 I [BX) ,3F8H
I SETUP RS232 CD · I ...DDR
BX
DX.2F",H
, CHECK IF RS232 CD 2 ...TTCH
"'L.DX
I RE ... D INTERRUPT 10 REG
"'L.OF6H
FI9
I B ... SE END
[IIRS232 BASE-D...T ...401 [BX) ,2F8H - I SETUP RS232 CD .2
BX
POST (01/10/86) 5-93
18104 Personel Co",put.er h4ACRO Assembler Version 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
I-II 01-10-86
136 061A 43
13' 13. 139 140 0618
1.... 1 0678 8B C6 142 0670 Bl 03 1....3 061F 02 C8 1....4 0681 OA C3 145 0683 A2 00 \ I R
1' ....6 0686 BA 020 I 1141 0689 EC 1148 068A 90
1149 0688 90 1150 068C 90 1151 0680 A8 OF
I 152 068F 15 05 1 153 0691 80 OE 00 1 1 RIO 1154 0696 1155 1156
1151 1158 0696 E4 61
I 159 0698 OC 30 I 160 069A E6 61 1161 069C 24 CF I 162 069E E6 61 I 163 06AO BO 80 1 164 06A2 E6 AO
165 06A4
I.'166 06A4 CD 19
I,.·9·
110 111
"'"'
1114 1115 1176 1171 I 178
11790flF2 1180 1181 06F2 t 182 ObFZ FB r 183 ObF3 2B CO I 184 06F!S 8E 08 1185 1186 1187
1188 ObF7 C7 06 0018 R OFC7 1 189 06FD 8C DE 001A R 1190 1191 1192
I 193 010 I 89 0004 1194 010.... 1195 070451
1196 0705 B4 00 1197 0107 CD 13 1198 0709 12 OF 1199 070B B8 020 I 1200 OTOE 2B 02 IZ01 0110 BE CZ IZ02 OT12 BB 7COO R 1Z03 IZ04 OTIS B9 0001 1205 0718 CD 13 12060 OT1A 120T OT1A 59 1208 OTIB 13 04 1209 OT10 E2 E5 1210 1211 lZ12
1213 OTIF 1214 011F CD 18
1215 1216 1211
1218 0121
1219 0121 EA lCOO ---- R 1220 0126 1221 1222 1223 OT29
1224 0129 0411 1225 0128 0300 1226 0120 0180 1Z21 OT2F OOCO 1228 0131 0060
1229 0133 0030 1230 0135 0018 1231 073T OOOC 1232 1233 0139 1234 0139 E9 0000 E
1235
1236 onc 1231 onc 0008
1238 013E FB 1239 013F 00 1240 01 ....0 01
IZ .... 1 0141 50 1242
1243 1244 IZ45 014Z 00
1246 0743 00 12.... T 0744 00 1248 0745 00 1249 .. 0146
INC
1----- SET UP EQUIP FLAG TO INDICATE NLI4BER OF PRINTERS AND RSZ32 CARDS
F20:
"OV
"OV ROR OR MOV
"OV IN NOP NOP
NOP TEST JNZ OR
AX. S [ CL,3 AL,CL AL,BL BYTE PTR DX,ZOIH AL,DX
OEQU I P
I I I I I FLAG+ I ,AL
BASE ENOl S I HAS 2- NUMBER OF RSZ32 SHIFT COUNT ROTATE RIGHT 3 POSITIONS OR IN THE PRINTER COUNT
I STORE AS SECOND BYTE
AL,OFH
F20 BYTE PTR
I OEQUIP FLAG+ 1,1&
-
I
NO GAME CARD
-
NO_GAh4E_CARDI
ENABLE NMI INTERRUPTS
F21:
IN OR OUT ANO OUT MOV OUT
INT
AL,PORT B AL,30H PORT B,AL AL,OCFH
~~~~O~,AL
OAOH,AL
19H
I RESET CHECK ENABLES
I ENABLE NMI INTERRUPTS LOAD BOOT STRAP, GO TO THE-SOOT LOADER
;--- INT 19 ---------------------------------- __________ _
; BOOT STRAP LOADER
J
TRACK O. SECTOR I I S READ I NTO THE
I
BOOT LOCATION ~SEGMENT 0, OFFSET lCOO!
;
AND CONTROL I S TRANSFERRED THERE.
;
IF THERE IS A HARDWARE ERROR CONTROL IS
TRANSFERRED TO THE ROM BAS I C ENTRY PO I NT.
I
I - - - - - - - - ----- - - - - - - - - - - -- - - - - - - - - - - - - ----- - - -------- - - -
ASSUME CS:CODE,DSIABSO
ORG
OE6F2H
ORC
006FZH
BOOT STRAP
~
STI
SUB MOV
PROC
AX,AX DS,AX
NEAR
I ENABLE INTERRUPTS 1 ESTABLISH ADDRESSING
--- RESET THE DISI'( PARAMETER TABLE VECTOR
R
MOV
MOV
LOAO SYSTEh4 FROh4 D I SI'(ETTE -- CX HAS RETRY COUNT
HII
"OV
PUSH "OV INT JC "OV SUB "OV "OV
CX,4
cx
AH,O I3H H' AX,20lH DX,DX ES,DX BX ,OFFSET OBOOT_LOCN
"OV
CX,I
INT
I3H
HZ:
poP
ex
JNC
H.
LOOP
HI
;----- UNABLE TO [PL FROM THE DISKETTE
H',
INT
18H
IPL WAS SUCCESSFUL
H4:
,,"P
BOOT _STRAP
-;;
ORO
ORO
AI
DW
DW
OW
ow ow
ow
DW DW
OBOOT LOCN ENDP
,..OE729H
00129H 1041
···
,·91·..9'
12
SET RETRY COUNT IPL SYSTEh4 SAVE RETRY COUNT RESET THE DISKETTE SYSTEM DISKETTE 10 IF ERROR7 TRY AGAIN READ IN THE SINGLE SECTOR I TO THE BOOT LOCATION
I DRIVE 0, HEAD a
I SECTOR I, TRACK 0
I DISKETTE 10
J RECOVER RETRY COUNT I CF SET BY UNSUCCESSFUL READ I 00 IT FOR RETRY TIMES
I GO TO RESIDENT BASIC
110 BAUD 150 .00 .00
1200 2400 4BOO
9&00
TABLE OF VALUES FOR INITIALIZATION
CONF TBL: - DW OB OB
OB OB
CONF E-CONF TBL-Z MODEL BYTE -
SUB MODEL BYTE
BIO! LEVEL 010!00008
DB DB OB DB EQU
USE I NT 15 H AH. OCOH
CONFIGURATION TABLE FOR THIS SYSTEM LENGTH OF FOLLOWING TABLE SYSTEM MODEL BYTE SYSTEh4 SUB MODEL TYPE 8YTE BIOS REVISION LEVEL ! 0000000 · DMA CHANNEL 3 USE BY BIDS O!OOOOOO .. CASCADED INTERRUPT LEVEL 2
= 00100000 REAL Tlh4E CLOCK AVAILABLE
00010000 .. KEYBOARD SCAN CODE HOOK 1AH RESERVED RESERVED RESERVED RESERVED
RESERVED FOR EXPANS I ON
5-94 POST (01/10/86)
IBM p.,.sonsl COlllput.,. MACRO AS ··fRbl.,. V."lIion 2.00 POST ----- 01-/10186 SYSTEM POST AND BIOS PROCEOURES
1-12 01-10-86
1250
1251
1252
1253
1254 0746
1255 0746 52
1256 0141 50
1251 0148 8C DA
1258 OHA 26: 88 36 0015 R
1259
1260 014F 81 FA C800
1261 0153 7C OC
1262 0155 E8 OCBA R
1263 0158 8E 1801 R
12640758 E8 1916 R
1265 015E
1266 015E 58
1267 015F 5A
1268 0160 C3
1269 0161
1210 0161 BA 0102
1211 0164 E8 19A5 R
1212 0167 EB F5
1213 0169
1214
1275 0769 45 52 52 4F 52 2E
1216
20 28 52 45 53 55
1277
40 45 20 3D 20 22
1278
46 3' 22 20 4B 45
1219
59 29 00 OA
1280
1281
1282 082E
1283 082E
1284 082E E9 0000 E
1285
1286
1281 0981
1288 0981
1289 0981 E9 0000 E
1290
1291 0981. 20 33 30 31 00 01.
1292 0990 36 30 31 00 OA
1293
1294
1295
1296
1291
1298
1299
1300
1301
1302
1303
1304
1305
1306
1301
1308
1309
1310
1311
1312
1313
1314
1315
1316
1311
1318
1319
1320
1321
1322
1323
1324 0995
1325 0995
1326 0995 FB
1321 0996 80 FC OC
1328 0999 F!S
1329 099A 72 17
1330
1331 099C IE
1332 0990 E8 1A 12 R
1333 09AO 56
1334 09A 1 8A C4
1335 09A3 98
1336 09A4 03 CO
1331 09A6 88 FO
1338 O9A8 FA
1339 09"'9 2E; FF 94 0986 R
1340
1341 09AE FB
1342 09AF 84 00
1343 0981 5E
1344 0982 IF
1345 0983
1346 09B3 CA 0002
1347
1348 09B6 09CE R
1349 09B8 Q9DF R
1350 09BA 09EO R
1351 09BC 09EO R
1352 09BE 09EO R
1353 09CO 09EO R
1354 09C2 09EO R
1355 09C4 09EO R
1356 09C6 09ED R
1357 09C8 09EO R
1358 09CA 09EF R
1359 09CC 09F4 R
1360 = 09CE
1361
1362 09CE
1363
;--;~ ~~;-~~~;~~; -~~D-~~~~~ -~~;~~;~-~D;- - ~~~ ~~~~~;~~-~;;D;;- ------- ------ - ~D~-~~;-;~~~----~~~; -------- ------------- ------------------- -------------
-
PUSH
PUSH
MOV
MOV
COP oL
CALL
"OV
C ...LL
ROM ERR ENOl
-
-POP
POP
RET
ROM ERR BEEP I
-
-MOV
CALL
O"P ROM_ERR ENDP
F30
OB
OX ... X OX.OS ES:OMFG_ERR_FLAG.OH
OX.OC800H ROM ERR BEEP PRT-SEGS J · OFFSET F3A E_MSCi
AX
OX
I SAVE POINTER
GET ADDRESS PO INTER <> <><>c> c>c>c>c> c> <> <><><> c> <> <><><>CHECKPOINTS CO->F4c><><> CRT C"'RO IN ERROR? GIVE CRT CARD FAIL BEEP PR I NT SEGEMENT I N ERROR
o I SPLA Y ERROR J.4SG
OX.OIOZH ERR BEEP
SHOR'T ROM_ERR_END
. 'ERROR. IRESUME "FI"
I BEEP I LONG. KEY) '.CR.LF
2 SHORT I ERROR PROMPT
ORO ORO KEYBOARD 10,
JMP
ORO
ORO
KB- INT:
O"P
F1
OB
F3
08
OE82EH 008ZEH
- - KEVBOARO 10 I
OE981H
00981H
- KB_ INT I
301·.CR.LF ·601·.CR.LF
I KEYBOARD ERROR I DISKETTE ERROR
1--- !NT IA H -- SVSTEM AND REAL TiME CLOCK SERVICES ------------------------
I
I
THIS BIOS ROUTINE ...LLOWS THE CLOCKS TO BE SET OR READ
I ; PARAMETERS;
IAHI = OOH READ THE CURRENT CLOCK SETTING ...NO RETURN WITH, (CX) = HIGH PORTION OF COUNT
(OXI = LOW PORTION OF COUNT
(AL I '" 0 T I MER HAS NOT PASSED 24 HOURS SINCE L ... ST READ.
1 I F ON ANOTHER OA Y. (RESET TO ZERO AFTER READ)
1AH) = 0 I H
SET THE CURRENT CLOCK US I NG.
(CX I '" HIGH PORTI ON OF COUNT
(OX) = LOW PORTION OF COUNT.
NOTE: COUNTS OCCUR ... T THE RATE OF 1193180/65536 COuNTS/SECOND (OR ABOUT 1&.2 PER SECOND -- SEE EQU"TESI
(AHI '" OAH RE...D THE CURRENT COUNT OF DAYS ...NO RETURN WITH.
ICX) = COUNT OF ELAPSED DAYS
IAH) :;: OBH SET THE CURRENT COUNT OF DAYS USING. (CX) :III COUNT OF ELAPSED DAYS
: NOTESI FOR ALL RETURNS CY= 0 FOR SUCCESSFUL OPERATION.
I
I NTERRUPTS ARE 0 I SABLEO OUR I NG OAT A MOD I F I CAT I ON.
I
AH 6 AL ARE RETURNED MODIFIED AND NOT DEFINED EXCEPT WHERE INDICATED.
ASSUME CSICOOE.DSIDATA
TIME OF DAY I T I ME-OF-DA Y-I I :
- -STI
CMP
C"C ..IC
PROC FAR
AH. (RTC_T8E-RTC_TB) 12 TlhIE_9
I NTERRUPTS BACK ON CHECK I F COMMAND I N VAL 10 RANGE COMPLEMENT CARR Y FOR ERROR EX I T
EXIT WITH CARRY. 1 IF NOT VALID
PUSH CALL PUSH "OV CBW ADO "OV CL! CALL
STI "OV POP POP
RET
RTC_TB OW OW OW OW OW Ow OW OW OW OW OW OW
RTC_ TBE EQU
OS DDS 51 ...L ....H
"'X.AX SI ....X
CS:[SJ )+OFFSET RTC_TB
AH.O Sf OS
RTC 00 RTC-' 0 RTC-NS RTC-NS RTC-NS RTC-NS RTC-NS RTC-NS RTC-NS RTC-NS
,RTC-AO
RTc -eo
SAVE USERS (OSI SEGMENT
GET DATA SEGMENT SELECTOR SAVE WORK REGISTER MOVE FUNCT I ON TO (AL) REG I STER CONVERT FUNCT I ON TO BYTE OFFSET CONVERT FUNCTION TO WORO OFFSET ICV.O) PLACE I NTO ADDRESS ING REG I STER
NO INTERRUPTS DURING TINE FUNCTIONS VECTOR TO FUNCTION REQUESTED WITH ChO
RETURN WITH CARRY FLAG SET FOR RESULT I NTERRUPTS BACK ON CLEAR (AH 1 TO ZERO RECOVER USERS REG I STER
RECOVER USERS SEGMENT SELECTOR RETURN WITH CY. 0 IF NO ERROR
ROUTINE VECTOR TABLE I",HI ...
OOH = READ CURRENT CLOCK COUNT
01 H = SET CLOCK COUNT
Oi2H
INVAL 10
03H
INVALID
04H
INVAL 10
OSH
INVALID
06H
INVALID
07H
INVALID
08H
INVALID
09H
INVALID
OAH · RE ...D SYSTEM DAY COUNTER
OBH · WRITE SYSTEM DAY COUNTER
POST (01/10/86) 5-95
IBM P."sonsl Co"'puts,. MACRO Ass.",bl.,. V.,.aion Z.OO POST ----- 01l10/6b SYSTEM POST AND BIDS PROCEDURES
1-13 01-10-66
13b4 09CE 13b5 09CE AO 0010 R 13bb 0901 Cb Ob 0010 R 00 13b 1 0906 6B OE OObE R 1366 09DA 6B 16 006C R 1369 09DE C3 1310 1311 09DF 1312 09DF 69 16 006C R 1313 09E3 69 OE 006E R 1314 09E1 C6 Ob 0010 R 00 1315 09EC C3
131b 1311 09ED 1316 09ED F9
'319 09EE C3 1360 1361 09EF 1362 09EF 6B OE OOCE R 1363 09F3 C3 , 364
'365 09F4 '36b 09F4 69 OE OOCE R '361 09F6 C3 1366 1369 09F9 1390 1391 1392 OC59 1393 OC59 E9 0000 E 1394 1395 1396 1391 1396 1399 1400 1401 1402 1403 1404 OC5C 1405 OC5C 9C 140b OC5D FA 1401 OC5E BO Bb 1406 OC60 Eb 43 1409 OC62 90 1410 OCb3 6A Cl 141 1 OCb5 E6 42 1412 OCb1 90 1413 OCb6 6A C5 1414 OCbA Eb 42 1415 OC6C E4 bl 141b OC6E 6A EO 1411 OC10 OC 03 1416 OC12 Eb bl 1419 OC14 90 1420 OC15 1421 OC15 B9 040B 1422 OC16 E6 OCAO R 1423 OC1B FE CB 1424 OC1D 15 Fb 1425 1426 OC1F 9C 1421 OC60 FA 1426 OC61 E4 bl
1429 OC63 OC FC 1430 OC65 22 EO 1431 OC61 6A C4 1432 OC69 24 FC 1433 OC6B Eb b I 1434 OC6D 90 1435 OC6E B9 040B 143b OC91 E6 OCAO R 1431 OC94 9C 1436 OC95 FA 1439 OC9b E4 b 1 1440 OC96 24 03
1441 OC9A OA C4 1442 OC9C Eb b 1 1443 OC9E 90 1444 OC9F C3 1445 1446 OCAO 1441 1446
1449 1450 1451 1452 1453 1454 1455 1456 1451 1456 1459 1460 OCAO
14bl OCAO 50 14b2 OCA 1 01 E9 14b3 OCA3 E3 13 14b4
14b5 OCA5 Eb OC 1466 OCA1 1461 OCA1 9C 1466 OCA6 FA 1469 OCA9 1410 OCA9 E4 00 1411 OCAB 24 FE 1412 OCAD 3A EO 1413 OCAF 6A EO 1414 OCBI E4 00 1415 OCB3 14 F4 1416 1411 OCB5 90
RTC- 00
PROC MOV MOV MOV MOV RET
NEAR AL, OT I MER OFL OTIMER OFL,O CXtOTIQER HICH OX ,oTl MER:LOW
I
READ T I ME COUNT
I CET THE OVERFLOW FLAC
I AND THEN RESET THE OVERFLOW FLAC
I CET COUNT OF TIME HIGH WORD
I CET COUNT OF T I ME LOW WORD
1 RETURN WITH NO CARRY
- RTC 10:
MOV MOV MOV RET
OTIMER LOW,DX OT I MER-H I GH, CX OTi MER:OFL, 0
SET T I ME COUNT SET T I ME COUNT LOW WORD SET THE T I ME COUNT HI CH WORD RESET OVERFLOW FLAG RETURN WITH NO CARRY
RTC_NSI STC RET
INVALID FUNCTION {NOT SUPPORTED) SET CARRY FLAC FOR ERROR (CY_I) EX I T THROUCH COMMON RETURN
- RTC AO, MOV RET
CX ,ODA Y_COUNT
READ SYSTEM DAY COUNTER CET COUNT OF DAYS EXIT THROUCH COMMON RETURN WITH CY=O
RTC_BO: MOV RET
ODA Y_COUNT, CX
SET SYSTEM DAY COUNTER SET COUNT OF DAYS EXIT THROUGH COMMON RETURN WITH ChO
RTC- 00 ENDP
ORO
ORO
01 SKETTE- 10:
OEC59H 00C59H
..JMP
DISKETTE_IO_I
; - - - BEEP - -------------------------------------- - - - ---- ----------------
;
ROUT I NE TO SOUND THE BEEPER US I NG T I MER 2 FOR TONE
I
; ENTRY:
= (BL) DURATION COUNTER (1 FOR l/b4 SECOND)
{CX) = FREQUENCY DIVISOR (1193160/FREQUENCY) 1133! FOR 666 HZ) EXIT:
(AXI, (BL) ,(CX) MODIFIED.
BEEP G1:
PROC PUSHF CL' MOV OUT NOP MOV OUT NOP MOV OUT
'N
MOV OR OUT POPF
MOV CALL DEC ONZ
PUSHF CLI
'N
OR AND MOV AND OUT POPF MOV CALL PUSHF
C'NL'
AND OR OUT POPF RET
NEAR
AL, 101 101 lOB TlMER+3,AL
AL,CL TlMER+2,AL
AL,CH TIMER+2,AL AL,PORT B AH,AL AL,GATE2+SPK2 PORT_B,AL
CX t l035 WAITF BL 01
AL,PORT B AL,NOT TGATE2+SPK2) AH,AL AL,AH AL,NOT ICATE2+SPK21 PORT_B,AL
CX,I035 WAITF
AL,PORT B AL,GATE2+SPK2 AL,AH PORT_B,AL
SETUP T I MER 2 SAVE INTERRUPT STATUS BLOCK I NTERRUPTS OUR I NG UPDA TE SELECT TIMER 2,LSB,MS8,81NARY WR I TE THE T I MER MODE REG I STER I/O DELAY DIVISOR FOR HZ (LOW) WRITE TIMER 2 COUNT - LSB I/O DELAY DIVISOR FOR HZ (HIGH) WR I TE T I MER 2 COUNT - MSB GET CURRENT SETT I NG OF PORT SAVE THAT SETTINC CATE TIMER 2 AND TURN SPEAKER ON AND RESTORE INTERRUPT STATUS
I /64 SECOND PER COUNT (BL I DELAY COUNT FOR I/M OF A SECOND CO TO BEEP DELAY !/64 COUNT (BLI LENCTH COUNT EXPIRED? NO - CONT I NUE BEEP I NG SPEAKER
SAVE INTERRUPT STATUS BLOCK INTERRUPTS DURINC UPDATE GET CURRENT PORT VALUE ISOLATE CURRENT SPEAKER BITS IN CASE
SOMEONE TURNED THEM OFF OUR I NG BEEP RECOVER VALUE OF PORT FORCE SPEAKER DATA OFF AND STOP SPEAKER TIMER RESTORE INTERRUPT FLAC STATE FORCE !/64 SECOND DELAY (SHORTI MINIMUM DELAY BETWEEN ALL 8EEPS SAVE INTERRUPT STATUS BLOCK INTERRUPTS DURING UPDATE GET CURRENT PORT VALUE IN CASE
SOMEONE TURNED THEM ON RECOVER VALUE OF PORT B RESTORE SPEAKER STATUS RESTORE INTERRUPT FLAG STATE
BEEP
ENDP
; - -- WA I TF ----- ------------------- ------------------ -- - ----- ----------- FIXED TIME WAIT ROUTINE (HARDWARE CONTROLLED - NOT PROCESSOR)
ENTRY: (CX)
EXIT: ICX)
= COUNT OF 15.065131 MICROSECOND INTERVALS TO WAIT
MEMORY REFRESH TIMER I OUTPUT AT THE DMA CHANNEL 0 ADDRESS REC I STER USED AS REFERENCE.
AFTER (CX I T I ME COUNT I PLUS OR M I NUS 31 MICROSECONDS)
= 0
WAITF
PROC PUSH SHR ..JCXZ
WAITFI : WAITF3:
OUT
PUSHF CLI
'N AND CMP MOV 'N OE
NEAR AX CX,I WAITF9
DMA+12,AL
AL,DMA AL,I!!I!!! 08 AH,AL AH,AL AL,DMA WAITF3
, DELAY FOR (CXI-!5.065131 US , SAVE WORK RECISTER (AH) , DIVIDE 15uII COUNT DOWN TO 30us COUNT , EXIT IF COUNT WAS ZERO OR ONE , CLEAR THE DMA BYTE POINTER FLIP/FLOP
SAVE INTERRUPT STATE BLOCK INTERRUPTS TI LL NEXT CHANCE
WA I T FOR REFRESH ADDRESS CHANCE READ CURRENT ADDRESS LOW BYTE DISCARD LOW BIT (30ua) 010 VALUE ..JUST CHANGE SA VE NEW / OLD VALUE INCASE IT 010 READ HI CH BYTE lAND IGNORE) WAIT FOR A CHANCE I N ADDRESS BITS
POPF
I RESTORE INTERRUPTS
~
5-96 POST (01/10/86)
18104 Personal Comput.er MACRO Assembl.,. V."slon 2.00 POST ----- 01/10/B6 SYSTEh4 POST AND BIOS PROCEDURES
1- ,. 01-10-86
1.78 OCB6 E2 EF
'.79 OCB8 1480 OCB8 58 I.B 1 OCB9 C3
'.B2 1.83 OCSA 1484 ··B5
14B6
'.87 14B8
'489 OCBA 1490 aCBA 8A C6
1491 OCBC E8 1958 R 1492 OCBF 8A e2 1493 oeel EB 1958 R 149. OCC. BO 30 1495 OCC6 E8 1969 R 1496 OCC9 BO 20
'497 OCCS E8 1969 R
'49B OCCE C3 '499 OCCF 1500 150 1
1502 1503 1504 )505
1506
1507 1508 1509 1510 151 I 1512 1513 1514 1515 1516 OeCF 1517 OeeF 88 09 1518 oeol Fe 1519 oe02 28 FF
1520 oeD. 2B co
1521 oe06 1522 OC06 BB 05 1523 OC08 8A 05
1524 OCOA 32 C4 1525 OCOC 75 79 1526 OCDE FE C4
'527 OCEO 8A C. 1528 OCE2 75 F2 1529 OCE4 88 55AA 1530 aCE7 88 DO 1531 aCE 9 F3/ A8 1532 OCEB E4 61 1533 aCED ac 30 1534 OCEF E6 6 I 1535 OCFI 90 1536 OCF2 2. CF 1537 OCF4 E6 61 1538
1539 OCF6 .F 1540 OCF7 4F 1541 OCF8 FO
1542 oeF9 88 F7 1543 aeFB 8B CB 1544 OCFO
1545 OCFo AD 1546 oeFE 33 C2 1547 0000 75 57
15.8 0002 B8 AA55 15.9 0005 AB 1550 0006 E2 F5
1551 1552 0008 FC 1553 0009 47 1554 000 A 47 1555 0008 88 F7 1556 0000 8B C8
1557 OOOF 88 DO 15580011 15590011 AD 1560 0012 33 C2 1561 0014 75 43 1562 0016 B8 FFFF 1563 0019 AB 1564 OOIA E2 F5
.F 1565
1566 ODIC 1567 0010 4F
1568 ODIE FO 1569 OolF 88 F7 1570 0021 8B eB
1571 0023 88 DO 1572 0025
1573 0025 AD 1574 0026 33 e2 1575 0028 75 2F 1576 002A B8 0101 1571 0020 AB 1578 OOZE EZ F5 1579 1580 0030 FC 1581 0031 47 1582 0032 41 1583 0033 BB F7 1584 0035 6B CB 1585 0037 6B DO
1586 0039 1587 0039 AD 1588 003A 33 C2 1589 003C 75 1B 1590 003E A8 1591 003F E2 F8
WA)TF9:
LOOP
POP RET
WAITFI AX
I DECREMENT CYCLES COUNT TI L.L. COUNT END
RESTORE lAM) RETURN (CX) .. 0
WAITF ENoP
1------- ------- ------------------------------------------- -----
;
PRINT A SEGMENT VALUE TO LOOK LIKE A 20 BIT ADDRESS
- - ------------------ ------ I
ox h4UST CONTAIN SECiMENT VALUE TO BE PRINTED
~~~ - ~~~ - ;~~; - - - - ~~;~ - - - - - - - - - - - - - - -
---
-
h40V
CALL
MOV
CALL
MOV
CALL
MOV
CALL
RET
PRT_ SECi ENOP
AL,OH XPC BYTE
AL,riL XPC BYTE
AL,'O' PRT HEX AL,' · PRT _HEX
IGET MSB ILSB 1 PRINT A '0 ' ,SPACE
I -- ----- -- - - - - - - - - - - -- - - - - - ---- - - ---- - - - - - - - - - - - - -- - - - - - - - - -----
I TMIS SU8ROUTINE PERFORMS A READ/WRITE STORAGE TEST ON A BLOCK
I
OF STORAGE.
; ENTRY REQUIREMENTS:
;
= ES ADDRESS OF STORAGE SEGMENT BEING TESTED
;
= OS ADDRESS OF STORAGE SEGMENT BEINe;, TESTED
;
= CX WORD COUNT OF STORAGE BLOCK TO BE TESTED
EX'T PARAMETERS:
ZERO FLAG = 0 IF STORAGE ERROR (DATA COMPARE OR PARITY I
CMECK. AL:::O DENOTES A PARITY CHECK. ELSE AL=XOR'EO
BIT PATTERN OF THE EXPECTED DATA PATTERN VS THE ACTUAL I
DATA READ.
;
-A--X-,B--X-,
--- CX.OX,OI,
---- --
-
-AND
-- -
S I
--
-
-- - ARE ALL
-- - -
-D-E-S-T-R-O--Y-E-D-.
-
-
-
-
-
-
-
-
-
-
-
-----
-----
STGTST CNT - MOV
CLD SUB SUB
PROC BX ,CX
01,01 AX,AX
NEAR
SAVE WORD COUNT OF BLOCK TO TEST SET 0 I R FLAG TO INCREMENT SET 0 I :OFFSET 0 REL TO ES REG SETUP FOR O->FF PATTERN TEST
MDV NOV
XOR
JNZ INC NOV JNZ
"DV NOV
REP IN DR OUT NDP AND OUT
!~: 'D~J
AL,AH C1 AH AL,AM C2 I AX-;-055AAM OX,AX STOSW AL.PORT B AL,030M PORT_B,AL
AL,OCFM PORT_B,AL
I ON FIRST BYTE
I O.K.? I GO ERROR IF NOT
LOOP TILL WRAP TMROUGM FF CET INITIAL DATA PATTERN TO WRITE SET INITIAL COMPARE PATTERN. FILL STORAGE LOCATIONS IN BLOCK
1 rOGCLE PAR I TY CMECK LATCHES
OEC
01
OEC
01
STO
NOV
Sl,ol
NOV
CX,8X
C3:
LOOSW
XOR
AX,OX
JNE
C1X
"DV STOSW
AX, OAA55H
LOOP
C3
, POINT TO LAST WORD .JUST WRITTEN
SET 0 I R FLAG TO GO BACKWARDS
INITIALIZE DESTINATION POINTER
SETUP WORD COUNT FOR LOOP
I
INNER TEST LOOP
I READ OLD TEST WORD FROM STORAGE
t DATA READ AS EXPECTED ?
, NO - GO TO ERROR ROUT I NE
I GET NEXT DATA PATTERN TO WRITE
1 WRITE INTO LOCATION JUST READ
DECREMENT WORD COUNT AND LOOP
CLO
INC
01
INC
01
NOV
Sl,ol
NOV
CX,8X
NOV
OX,AX
C4:
LOoSW
XDR
AX,OX
JNE
C1X
NOV
AX,OFFFFH
STOSW
LOOP
C4
SET 0 I R FLAG TO GO FORWARD SET POINTER TO 8EG LOCATION
INITIALIZE DESTINATION POINTER SETUP WORD COUNT FOR LOOP SETUP COMPARE PATTERN OF ·OAA55W.
INNER TEST LOOP READ OLD TEST WORD FROM STORAGE DATA READ AS EXPECTED? NO - GO TO ERROR ROUT I NE GET NEXT DATA PATTERN TO WRITE WRITE INTO LOCATION JUST READ DECREMENT WOAD COUNT AND LOOP
DEC
01
OEC
01
STO
NOV
51,01
NOV
CX,BX
NOV
OX,AX
C5 :
LODSW
XOR
AX,OX
JNE
C1X
MOV
AX,aOl01M
STOSW
LOOP
C5
1 POINT TO LAST WORD .JUST WRITTEN
SET DIR FLAG TO GO 8ACKWAROS INITIALIZE DESTINATION POINTER SETUP WORD COUNT FOR LOOP SETUP COMPARE PATTERN ·OFFFFH·
INNER TEST LOOP READ OLD TEST WORD FROM STORAGE DATA READ AS EXPECTED? NO - GO TO ERROR ROUTINE GET NEXT DATA PATTERN TO WRITE WRITE INTO LOCATION .JUST READ DECREMENT WORD COUNT AND LOOP
CLD
INC
01
INC
01
"DV
S 1,01
"DV
cX,ex
"DV
OX,AX
C6:
LOoSW
XDR
AX,oX
JNE
C1X
STOSW
LOOP
C6
SET 0 I R FLAG TO GO FORWARD SET POINTER TO BEG LOCATION
INITIALIZE DESTINATION POINTER SETUP WORD COUNT FOR LOOP SETUP COMPARE PATTERN ~OOIOIW.
I NNER TEST LOOP READ OLD TEST WORD FROM STORAGE DATA REAO AS EXPECTED ? NO - GO TO ERROR ROUT I NE WRITE ZERO INTO LOCATION READ DECREMENT WORD COUNT AND LOOP
POST (01/10/86) 5-97
IBM p.,..on.t Comput..,.. MACRO Ass.mbl.,. V.,..sion 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-15 01-10-8&
1592
1593 0041 4F 159-4 0042 4F 1595 0043 FD
159& 0044 68 F1 1591 0046 88 CB
1598 0048 88 DO
1599 OD-4A
1600 00-4A AD 1601 00-4B 33 C2 1602 0040 15 OA
I b03 OD4F E2 F9 1604 1&05 0051 E4 &2 1606 0053 24 CO 1601 0055 BO 00
1608 0051 1609 0051 FC 16100058 C3 16110059
1612 0059 3C 00 1613 005B 15 FA 1614 0050 8A C4 1615 OD5F EB F6 1616 0061 1611 1618
1619 OFS1 1620 OF51 E9 0000 E 1621
1622 1623 OF79 1624 1625
1&2& 1627 1628 1&29
'630 OF19 '&31 OF19 OF 1&32 OF1A 02 1633 OF7B 25
1634 OF7C 02 1635 OF70 09 1&36 OF7E 2A 1631 OF7F FF 1&38 OF80 SO
1639 OF81 F6 1640 OF82 OF 1641 OF83 08 1642 OF8-4 27
1643 OF8S 80 1644
1645 1646 1&47 OF6b
1648 OF86 OF
1649 OF87 02 t &50 OF86 25 1651 OF89 02 1652 OF8A 09 1653 OF8B 2A 1654 QF6C FF 1655 OF8D 50 1656 OF8E F& 1657 OF8F OF 1658 OF90 08 1659 OF91 27 1660 OF92 40
1&61 1662 1663 1664 OF93
1665 OF93 OF 1666 OF94 02
1667 OF95 25 1668 OF96 02 1&69 OF91 OF
1610 OF96 lB 1671 OF99 FF
1612 OF9A 54
1613 OF9B F6 1614 OF9C OF 1615 OF9D 08 1676 OF9E 4F 1677 OF9F 00 1678 1&19 1680 1681 OFAO
1662 OFAO OF 1683 OFA' 02 1684 OFA2 25
1665 OFA3 02 1686 OFA4 09 1681 OFA5 2A 1&88 OFA6 FF 1689 OFA7 50
1690 OFA8 F6 1691 OFA9 OF
1692 OFAA 08 1693 OFAB 4F 1694 OFAC 80 1695 1696 1691 1698 OFAD 1699 OFAD OF
1700 OFAE 02 1701 OFAF 25 1702 OFBO 02 1703 OFBI 09 1704 OFB2 2A 1105 OFB3 FF
C6X:
DEC DEC STO "DV NOV NOV
LODS. XOR "NE LOOP
DI DI
S! ,01 CX ,BX OX I AX
AX,DX C'X COX
PO I NT TO LAST WORD ,JUST WR r TTEN
SET 0' R FLAG TO GO BAC,",WARDS INITIALIZE DESTINATION POINTER SETUP WORD COUNT FOR LOOP SETUP COMPARE PATTERN ~OOOOOH·
I VERIFY MEMORY IS ZERO. I DATA READ AS EXPECTED 7 I NO - GO TO ERROR ROUT I NE ; DECREMENT WORD COUNT ANO LOOP
IN AND
C7:
NOV
C1X:
CLD RET
COP
JNZ NOV
J"P
- STGTST CNT
AL,PORT_C AL,OCOH AL,O
AL,O C7 AL,AH SHORT C7 ENDP
DID A PAR I TY ERROR OCCUR 7 ZERO FLAG Wr LL BE OFF, r F PAR I TY ERROR AL_O DATA COMPARE OK
SET DIRECTION FLAG TO INC
I FIND BYTE THAT FAILED.
ORC
DRC
- 01 S,", INT:
OEF51H OOFS1H
""P
- DIS'"' INT I
DRC
OEF79H
; --------D-R-C------O-O-F-7-9-H- --- - -- - - - -- --------------------- -- - --- - - ------
;
MEDIA/DRIVE PARAMETER TABLES
I
------ -- ---------------- ----------------- I - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --- - - - - - - ------- - - - - - - - - - - - - - - - -
;
---------- -
------------ ---
I
40 TRACK LOW DATA RATE MEDIA IN 40 TRACK LOW DATA RATE DRIVE I
LABEL BYTE
DB
11011111B
SRT=O, HD UNLOAD=OF - 1ST SPECIFY BYTE
DB
2
HD LOAD= I, MODE=DMA - 2ND SPEC I FY BYTE
DB
MOTOR WAIT
WAIT TIME AFTER OPERATION TILL MOTOR OFF
DB
2
-
512 BYTES / SECTOR
DB
09
EOT I LAST SECTOR ON TRACK I
08
02AH
GAP LENGTH
DB
OFFH
DTL
08
OSOH
GAP LENGTH FOR FORMAT
08
OF6H
FILL BYTE FOR FORMAT
DB
IS
HEAD SETTLE TIME (MILLISECONDS~
DB
8
MOTOR START TIME (118 SECONDS~
DB
39
MAX. TRACK NUMBER
08
RATE_Z50
I DATA TRANSFER RATE
I - - - - - - ----------- - - - - - - - - - - - - - - - - - - - -- ------- - - - - --- - - - - - - - - - - - - - - --
= ;
~~ ~~~~
--------- -40 TRACK LOW ~~~~~
DATA -~;~~
R-A-T-E--M--E
D-IA---IN--B-O--T-R-A-C-K--H--I -D-A-T-A--R-A--T-E
-D--R-IV-E----I
DB
11011111B
SRT:D, HD UNLOAD=OF - 1ST SPECIFY BYTE
DB
2
HO LOAD= 1, MODE=DMA - 2ND SPEC I FY BYTE
DB
MOTOR WA I T
WA I T T J ME AFTER OPERAT I ON TILL MOTOR OFF
DB
2
-
512 BYTES I SECTOR
DB
09
EOT 1 LAST SECTOR ON TRACK I
DB
02AH
GAP LENGTH
DB
OFFH
DTL
08
050101
GAP LENGTH FOR FORMAT
08
OF6H
FILL BYTE FOR FORMAT
08
15
HEAD SETTLE TINE ·(MILLISECONDS)
08
15
MOTOR START TIME (1/15 SECONDS)
DB
39
MAX. TRACK NUMBER
:
-
-
-
-
-
--D-B--
--
---R--AT-E-_-S-a-O-
-
-
-
-
-
-
-
-
I
-
-D-A-T-A--T-R--AN--SF-E-R--R--AT-E--
-----
--
-
----
--
--
= -------- - ------------------------------------------- I
80 TRACK HI DATA RATE MEDIA IN 80 TRACK HI DATA RATE DRIVE
~~ ~~~;
-~;;~~ ~;~~
DB
11011111B
SRT=D, HD UNLOAD=OF - 1ST SPECIFY BYTE
DB
2
1010 LOAD= I. MODE:DMA - 2ND SPECIFY BYTE
08
MOTOR WAIT
WAIT TIME AFTER OPERATiON TILL MOTOR OFF
08
2
-
512 BYTES/SECTOR
DB
15
EOT I LAST SECTOR ON TRACK ~
08
01 BH
GAP LENGTH
DB
OFFH
DTL
DB
054101
GAP LENGTH FOR FORMAT
DB
OF6H
FILL 8YTE FOR FORMAT
DB
15
HEA.D SETTLE TIME (MILLISECONDSI
DB
15
MOTOR START T I ME I 1 /15 SECONDS ~
DB
79
MAX. TRACK NUMBER
DB
RATE_SaO
DATA TRANSFER RATE
I - - - - - - - - - - - - - - - ---- - - - - - - - - - - - - - - - - ---- - --------- -- - - - - - - - - - - - - - - - --
= -------- ------------------------------------------- :
80 TRACK LOW DATA RATE MEDIA IN 80 TRACK LOW DATA RATE DRIVE:
~~ ~~~~-
~;;~~- ~;~~
DB
110111118
5RT=D, 1010 UNLOAO=OF - 1ST SPECIFY BYTE
DB
2
HD L.OAD=I, MODE=DMA - 2ND SPECIFY BYTE
DB
MOTOR WAIT
WAIT TIME AFTER OPERATION TILL MOTOR OFF
DB
2
-
5 r 2 BYTES / SECTOR
08
09
EOT ( LAST SECTOR ON TRACK)
DB
02AH
GAP LENGTH
DB
OFFH
DTL
DB
050H
GAP LENGTH FOR FORMAT
DB
OF6H
FILL 8YTE FOR FORMAT
DB
15
HEAD SETTLE T I ME (M I LL I SECONDS)
08
8
MOTOR START TIME 11/8 SECONDS)
DB
79
MAX. TRACK NUMBER
; ---- ----D-B-------R-A-T-E-_-25-0- - - - ------I --D-A-T-A--T-R-A-N-S-F-E-R--R-A-T-E -
- --- ---- - -- -----
;
80 TRACK LOW DATA RATE MEDIA IN 80 TRACK HI DATA RATE DRIVE I
I - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - ---- - - - - - - - ----- - - - - - - - - - - - - - - - - -
1140 TBL5
LA8EL BYTE
-
DB
1I011111B
SRT=D, 1010 UPlLOAD.OF - 1ST SPECIFY BYTE
DB
2
HD LOAD= I, NOoE=oNA - 2ND SPEC I FY 8YTE
DB
MOTOR WA I T
DB
2-
WAIT TIME AFTER OFERATION TILL MOTOR OFF
S 12 BYTES / SECTOR
DB
09
EOT I LAST SECTOR ON TRACK)
DB
02AH
GAP LENGTH
DB
OFFH
OTL
5-98 POST (01/10/86)
IBN Personal Computer NACRO Assembler Version 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-16 01-10-86
1706 OFB4 50
1707 OFB5 F6
1708 OFB6 OF
1709 OFB7 08
1710 OFB8 4F
1711 OFB9 80
1712
1713
1714
1715 OFBA
1716 OFBA AF
1717 OFBB 02
1718 OFBC 25
1719 OFBD 02
1720 OFBE 12
1721 OFBF IB
1722 OFCO FF
1723 OFC 1 6C
1724 OFC2 F6
1125 OFC3 OF
1726 OFC4 08
1727 OFC5 4F
1128 OFC6 00
1129
1130
1731
1132
1733
1134
1735
1736
1737 OFC7
1738 OFC7
1739 OFC7 CF
1140 OFC8 02
1741 OFC9 25
1142 OFCA 02
1143 OFCB 08
1744 OFCC 2A
1145 OFCD FF
t 746 OFCE 50
1747 OFCF F6
11480FOO 19
1149 OFOI 04
1750
1151
1152 OF02
1153 DFD2
1754 OF02 E9 0000 E
1755
1756
1751 1045
1758 1045 0000 E
1759 1047 0000 E
1760 1049 0000 E
1761 104B 0000 E
1762 1040 0000 E
1763 104F 0000 E
1764 1051 0000 E
1765 1053 0000 E
1766 1055 0000 E
1767 1057 0000 E
1168 1059 0000 E
1169 105B 0000 E
1770 1050 0000 E
1171 105F 0000 E
1772 1061 0000 E
1773 1063 0000 E
1774 = 0020
1775
1716
1771 1065
1778 1065
1779 1065 E9 0000 E
1180
1781
1182
1783
1784
1785 1786 IOA4 1787 IOA4 1788
I.38 28
20
OA
IF
06
1789 10AB IC 02 07 06 07
1790 lOBO 00 00 00 00
I. 1791 : 0010
1792
1793 10B4 71 1794
50
SA
OA
IF
06
.. 1795 10BB IC 02 07 0607
1796 lOCO 00 00 00 00 1797
1798 10C4 38 28 20 OA 7F 06 1799
1800 10CB 70 02 01 06 07
1801 1000 1802
1803 1004 1804
I.00
61
00 50
00 52
00 OF
19
06
1805 100B 19 02 00 DB DC
1806 IDEO 00 00 00 00
1801
1808 IOE4 0800
1809 10E6 1000
1810 10E8 4000
181 I 10EA 4000
1812
1813
1814 10EC 28 28 50 50 28 28
1815
50 50
1816
1817 IOF4 2C 28 20 29 2A 2E
1818
IE 29
DB
050H
DB
OF6H
DB DB DB
,.15
8
DB
RATE_250
GAP LENGTH FOR FORMAT
FILL BYTE FOR FORMAT
HEAD SETTLE TINE 1M I LL I SECONDS)
MOTOR START TINE {I /8 SECONDS)
NAX. TRACK NUNBER
I DATA TRANSFER RATE
80 TRACK HI DATA RATE NEOlA IN 80 TRACK HI DATA RATE DRIVE
~~~~~~~---------~~~E~-~;~E--------------------------------------------
DB
lOlOllllB
DB
2
DB
NOTOR WAIT
DB
2
-
DB
18
DB
0 I BH
DB
OFFH
DB
06CH
DB
OF6H
DB
15
DB
8
DB
79
DB
RATE_SOO
SRT=A, HD UNLOAD=OF - 1ST SPECIFY BYTE
HD LOAD: I. NODE=DMA - 2ND SPECIFY BYTE
WAIT TINE AFTER OPERATION TILL NOTOR OFF
512 BYTES I SECTOR
EOT ( LAST SECTOR ON TRACK)
GAP LENGTH
DTL
GAP LENGTH FOR FORMAT
FILL BYTE FOR FORNAT
HEAD SETTLE TIME (MILLISECONDS)
MOTOR START T I ME I 1 /8 SECONDS)
NAX. TRACK NUMBER
DATA TRANSFER RATE
DISK BASE
- TH I SIS THE SET OF PARANETERS REQU I RED FOR 0 I SKETTE OPERAT I ON.
THEY ARE POINTED AT BY THE DATA VARIABLE DISK POINTER. TO
MODIFY THE PARM~ETERS, BUILD ANOTHER PARAMETER BLOCK AND POINT I
;--
DISK POINTER TO IT.
;
DRG
OEFC7H
DRG
00FC7H
DISK BASE
-
DB
DB DB DB DB
LABEL BYTE
11001111B
2
NOTOR WA I T
2
-
8
SRT::C, HD UNLOAD::OF - I ST SPEC I FY BYTE
HD LOAD:: 1 , NODE::DMA - 2ND SPECIFY BYTE
WA I T AFTER OPN TIL MOTOR OFF
512 BYTES/SECTOR
EOT I LAST SECTOR ON TRACK)
DB
02AH
GAP LENGTH
DB DB DB DB DB
.OFFH
050H OF6H 25
DTL
GAP LENGTH FOR FORMAT
FILL BYTE FOR FORNAT
HEAD SETTLE TIME (MILLISECONDS)
MOTOR START TINE (1/8 SECONDS)
aRG aRG PRINTER 10:
- JMP
DEFD2H
00FD2H
PRINTER_IO_'
"'L
aRG aRG OW OW OW OW OW OW OW OW OW OW OW OW OW OW OW OW EOU
aRG aRG VIOEO_IO:
J"P
OF045H 01045H OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET OFFSET I-loll
SET MODE
I
SET-CHPE
SET-CPOS
READ CURSOR
READ-LPEN
ACT D I SP PAGE
SCR'EiLL UP
SCROLL-DOWN
READ AC CURRENT WR I T~ AC CURRENT
WR I TE-C CURRENT
SET C'EiL'EiR
WR I "FE DOT
READ DOT
WR I TE TTY
VIOEO::::STATE
DF065H
0106SH
TABLE OF ROUTINES WITHIN VIDEO 1/0
VIDEO PARAMETERS
lNIT TABLE
ORG ORG
OFOA4H
0 I OA4H
V IDEO PARNS -
DB
BYTE
38H,28H,20H,OAH,IFH,6,19H
I SET UP FOR 40X25
DB DB EQU
ICH,2, 7 ,6, 7
0,0,0,0
$-VIOEO_PARt.4S
DB
71 H,50H, 5AH, OAH, 1FH, 6, 19H
; SET UP FOR 80X25
DB
lCH,2,7 ,6, 7
DB
0,0,0,0
DB
38H, 28H, 20H, OAH, 7FH, 6. 64H
I SET UP FOR GRAPH I CS
DB
70H,2,1.6.7
DB
0,0,0,0
DB
61H,50H,52H,OFH,19H,6,19H
I SET UP FOR 80X25 B&W CARD
DB
19H,2,ODH,OBH,OCH
DB
0,0,0,0
OW
2048
OW
4096
OW
16384
OW
16384
T ABLE OF REGEN LENGTHS
40X25
80X25
GRAPH ICS
; -1146
COLUMNS
DB
40,40,80,80,40,40,80,80
;
C REG TAB
1147
DB - 2CH,28H,20H,29H,2AH,2EH,1EH,29H I TABLE OF NODE SETS
POST (01/10/86) 5-99
IBN Per-sonill Co",put.er- NACRO Asse",bler- V.r-aion 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-17 01-10-86
1819
1820 1821 1822
1823 182~
1825 1826 1827
1828 1829
1830 1831 1832
1633 1834 1835
1836 1837 1638 1839 1840 1841
1842 1841 1843 1841 1844 1841 FB 1845 1842 IE 1846 1843 E8 lAI2 R 1841 1846 AI 0(l13 R
1848 1849 IF
1849 184A CF 1850 184B 1851 1852
1853 1854
1855 1856 1851 1858 1659
1860 1861 1862 1863 1864 I 86~ 1866 1861 1868 1869 1810
1871 1812 1873 1874
18T5 1816 1811 1818 1819 1880 1881 1882 1883 1884 1885 1886 1887
188e 1840 1889 1840 1890 1840 FB 1891 184E IE 1892 184F E8 IAI2 R 1893 1852 AI 0010 R
1894 1855 IF 1895 1856 CF
1896 1851 1897 1898
1899 1900
1901 1859 1902 1859 1903 1859 E9 0000 E 1904 1905
1906 1907 1908 1909
1910 1911 1912
1913 1914 18SC 1915 1916 185C 50 1911 1650 E4 62 1918 185F A8 CO 1919 1861 15 03 1920 1863 EB 58 90 1921 1866
1922 1866 SA ---- R 1923 1869 8E OA 1924 1868 BE 18E2 R 1925 186E A8 40 1926 1870 75 03 1921 1872 BE 18F2 R 1928 1875 1929 1875 84 00
1930 1611 AO 0049 R 1931 187A CD 10 1932 167C E8 1997 R
PAGE
; - - - 1NT 12 ------- - - - - - ------------ ----- - - ---------- - ------ - ---------- MEMORY SIZE DET
THIS ROUTINE DETERMINES THE AMOUNT OF MEMORY IN THE SYSTEM AS REPRESENTED BY THE SWITCHES ON THE PLANAR. NOTE THAT THE SYSTEM MAY NOT 8E ABLE TO USE 110 MEMORY UNLESS THERE I S A FULL COMPLEMENT OF 64K BYTES ON THE PLANAR. INPUT
NO REGISTERS THE MEMORY SIZE VARIABLE IS SET DURING POWER ON DIAGNOSTICS
ACCORDING-TO THE FOLLOWING HARDWARE ASSUMPTIONSI
= PORT 60 BITS 3,2 00 - 256K BASE RAN
01 - 512K BASE RAM 10 - 576K BASE RAM 11 - 640K BASE RAM PORT 62 BITS 3-0 INDICATE AMOUNT OF 110 RAM IN 32K INCREMENTS E.G .· 0000 - NO RAM IN 110 CHANNEL 0010 - MK RAM IN I/O CHANNE:L. ETC. OUTPUT
tAX' .. NUMBER OF CONTI GUOUS 1K BLOCKS OF MEMORY
ASSUME CSrCODE,OSIDATA
ORG
OF841H
ORG
01841H
MEMORY SIZE OET PROC
STI
PUSH
as
FAR
CALL MaY pop
ODS
AX, ClMEMORY SIZE
OS
-
IRET
MEMORY_SIZE_OET ENDP
I NTERRUPTS BACK ON SAVE SEGMENT
GET VALUE RECOVER SEGIENT RETURN TO CALLER
;--- INT II ------------------------------------------------------------1
EQUIPMENT DETERMINATION
I
THIS ROUTINE ATTEMPTS TO DETERMINE WHAT OPTIONAL
I
DEVICES ARE ATTACHED TO THE SYSTEI.4.
I
I.m
I
NO REGISTERS
I
THE EQUIP FLAG VARIABLE IS SET DURING THE POWER ON
I
DIAGNOSTICS USING THE FOLLOWING HARDWARE ASSUMPTIONS,
I
PORT 60 "LOW ORDER BYTE OF" EQUPMENT
I
PORT 3FA : INTERRUPT 10 REGISTER OF 8250
I
BITS 7-3 ARE ALWAYS 0
I
PORT 318 : OUTPUT PORT OF PRINTER -- 8255 PORT THAT
I
CAN 8E READ AS WELL AS WR I TTEN
I
OUTPUT
I
(AX, IS SET. BIT SIGNIFICANT, TO INDICATE ATTACHED 1/0
I
BIT 15,1~ : NUMBER OF PRINTERS ATTACHED
I
BIT 13 NOT USED
BIT 12 : GAME 1/0 ATTACHED
BIT 11,10,9 : NUMBER OF RS232 CARDS ATTACHED
= BIT 8 UNUsED
BIT 7,6 NUMBER OF DISKETTE DRIVES
00=1, 01=2, 10:3, 11=4 ONLY IF BIT 0 = I
BIT 5,4 = INITIAL VIDEO MODE
00 - UNUSED
01 - 40X25 BW US I NG COLOR CARD
10 - 80X25 BW US I NG COLOR CARD
I 1 - 80X25 BW US I NG BW CARD
BIT 3,2 = PLANAR RAM SIZE {00::256K,OI=512K,10:516K,11 .. 640K)
BI T I = MATH COPROCESSOR
BIT 0 = IPL FROM DISKETTE -- THIS 81T INDICATES THAT
THERE ARE DISKETTE DRIVES ON THE SYSTEM
I
j
NO OTHER REG I STERS AFFECTED
I
; - - - - --- -- - - - - - - - - ------ - - - - - - - - - - - --- - - ----- -- - -- - - - - --- - ---- - - - - - - - - --I
ASSUME CS:CDDE.DS,OATA
ORG
OF840H
ORG
0 I l!4DH
EQU I PI.4ENT
PROC
FAR
STI
I NTERRUPTS BACK ON
PUSH
OS
SAVE SEGMENT REGISTER
CALL
DOS
MaY POP
AX · ClEQU 1P FLAG
OS
-
GET THE CURRENT SETT I NGS RECOVER SEGMENT
IRET
RETURN TO CALLER
EQUIPMENT
ENDP
1--- 1NT 15 ---- - ---------- - - -- ------------------- - - ---------------- -- --
ORO ORO CASSETTE 10: JI.4P
OF859H
o1859H
; -- - - - - -- - - --- ------- - - - --- ---- ----- -- - - --- - ---- ----- - - - ---- - -- -
; NON-MASKA8LE I NTERRUPT ROUT I NE:
;
THIS ROUTINE WILL PRINT A ~PARJTY CHECK 1 OR 2- MESSAGE
;
AND ATTEMPT TO FIND THE STORAGE LOCATION CONTAINING THE I
;
BAD PAR I TY , I F FOUND. THE SEGMENT ADORESS WILL BE
;
PRINTED. IF NO PARITY ERROR CAN BE FOUND (INTERMITTANT I
;
READ PROBLEM! ?????<-WILL BE PRINTED WHERE THE ADDRESS I
;
WOULD NORMALL Y GO.
~~ I - ~ ~~-~-------;~~~ -- --~~~~---------
-ASSUME PUSH IN TEST
JNZ JMP
DS:DATA
AX AL.PORT C
AL, OCOH-
NMI 1
014-
; SAVE ORIG CONTENTS OF AX
; PAR I TY CHECK?
I NO, EXIT FROM ROUTINE
013:
MaY MaY MaY TEST JNZ MaY
MaY MaY INT CALL
OX,DATA
DS,OX
SI,OFFSET 01 AL,40H 013 S I ,OFFSET 02
AH,O
AL,.CRT MODE
10H
-
P~MSG
ADDR OF ERROR MSG
1/0 PARITY CHECK
o I SPLA Y ERROR MSG
I.4UST BE PLANAR
I INIT AND sET MODE FOR VIDEO
CALL V IDEO 10 PROCEDURE
PR I NT ERROR MSG
5-100 POST (01/10/86)
IBM p.,..onal Comput.,. MACRO A33.mbl.,. "e"'3,on 2.00 POST ----- 01/10/66 SYSTEM POST AND BIOS PROCEDURES
1933
1934
1935
1936 187F BO 00
1937 1881 E6 AO
1936 1883 E4 61
1939 1885 OC 30
1940 1887 E6 61
1941 1889 24 CF
1942 1888 E6 61
1943 1660 68 IE 0013 R
1944 1891 FC
1945 1692 28 02
1946 1694
1947 1894 8E 010
1948 1896 8E C2
1949 1698 B9 4000
1950 1698 28 F6
1951
1952 1890 F3/ AC
1953 189F E4 62
1954 18AI Z4 CO
1955 181.375 II
1956 161.581 CZ 0400
1957 181.9 83 E8 10
1958 18AC 75 E6
1959 18AE BE 190Z R
1960 1681 E8 1997 R
1961 1884 FA
196Z 1885 F4
1963 1886
1964 1886 8C OA
1965 18B8 E8 OC8A R
1966 18BB FA
1967 18BC F4
1968 18BO
1969 18BO 58
1970 168E CF
1971 16BF
1972
1973
1974
1975
1976 16BF
1977 18BF B9 0000
1976 16CZ
1979 16CZ 3Z CO
1980 16C4
1981 16C4 OZ 07
1982 18C6 43
1983 18C7 E2 F8
1984 16C9 0 .... CO
'985 18CB C3
'986 18CC
1987
1988
1969
1990 18CC 31 30 31 00 0 ....
1991 1801 20 32 30 31 0001.
199Z 1807 52 4F 40 00 01.
1993 18DC 31 38 30 31 00 01.
1994 18E2 SO 41 52495459
1995
204348454348
1996
20 32 00 0 ....
1997 18FZ 50 41 52 49 54 59
1998
20 43 48 45 43 4B
1999
20 31 00 01.
2000 1902 3F 3F 3F 3F 3F 00
200 I
01.
2002
2003
2004
2005
2006
2007
2008 1909
2009 1909 FB
2010 1901. 50
ZOII 1908 E4 61
20 12 1900 81. EO
2013 190F F6 DO
201419112440
2015 191360 E4 8F
2016 1916 OA C4
2017 1918 E6 61
2016 1911. 80 20
2019 191C E6 20
2020 191E 56
2021 191F CF
2022 1920
2023
2024
2025
2026
2027
2026 1920
2029 1920 88 ---- R
2030 19Z3 8E CO
2031 19Z5 ZA E4
2032 19Z7 61. 47 02
2033 19ZA Bl 09
2034 192C 03 EO
2035 19ZE 8B C8
2036 1930 51
Z037 1931 B9 0004
Z038 1934 03 E8
2039 1936 03 DO
2040 1938 59
2041 1939 E6 16CZ R
Z042 193C 74 06
Z043 193E E8 0746 R
Z044 1941 EB 14 90
2045 1944
Z046 1944 52
;----- SEE IF LOC.... TION THAT CAUSED PARITY CHECK CAN 8E FOUND
MOV
'NOUT
OR OUT
AL.OOH OAOH.AL AL.PORT 8 AL.OOIIOOOOB PORT B.AL
I 0 I SABLE TR .... P I TOGGLE PAR I TY CHECK ENABLES
NMI
ANa OUT MOV eLO SUB LOOP,
AL.IToOIIIIB
~~7!M~M~~Y_ SIZE
OX.OX
GET MEMORY SIZE WORD SET OIR FLAG TO INCRIMENT POINT OX AT START OF MEM
-
MOV
MOv
OS.OX ES,OX
MOV
CX ,4000H
SET FOR 16K8 SC ....N
SUB
SI,SI
SET SI TO BE REAlTI"E TO
REP IN AND JNZ
ADD SUB
LOOS8 AL ,PORT C AL, 1 10000008 PRT NMI OX.0400H BX,I6D
START OF ES READ 16K8 OF MEMORY SEE I F PAR I TY CHECK HAPPENED
GO PRINT ADDRESS IF IT DID POINT TO NEXT 16K BLOCK
JNZ
MOV
CALL
eLI
HLT
PRT NMI:
-
1040"
NMI LOOP SI.IOFFSET 02 .... , P _MSG
PRINT ROW OF 71171 IF PARITY CHECK COULD NOT BE RE-CREATED
I HALT SYSTEM
CALL CLI
HeT
PR I NT SEGMENT "ALUE H.... L T SYSTEM
0141
POP IRET NMI_INT_I
AX ENOP
I RESTORE OR I G CONTENTS OF AX
; ---------- ------------------------- ----
1 ;
---
-----RO-S-
-
C-H-E-C-K-S-U-M---S-U-B-R-O-U-T-I -N-E--
---
----
ROS CHECKSUM
PROC
NE ....R
I NEXT ROS MODULE
-
MOV
CX. 0
I NUMBER OF 8YTES TO ADD
ROS CHECKSUM CNT:
-
XOR -
AL.AL
I ENTRY FOR OPT! ONAl ROS TEST
C26:
AOO
AL,OS: [BX]
'NC LOOP OR RET
BX C2. AL.Al
POINT TO NEXT BYTE ADD ALL BYTES [N ROS MODULE
SUM = 07
ROS_CHECKSUM
ENOP
I
MESSAGE AREA FOR POST
~~------~;------~~~~~~~~~~;-------------- SYSTEM BOARD ERROR
EI
DB
F3A
08
F3C
DB
01
DB
' 20 I' ,CR,LF 'ROM' ,CR,LF
'1801' .CR,LF 'PARITY CHECK
Z' .CR,LF
MEMORY ERROR ROM CHECKSUM ERROR EXPANSION 10 BOX ERROR
02
DB
'PARITY CHECK I',CR,LF
0,. DB
'77777' ,CR,LF
; --------- --- ------------ ------------------ ---------- -------------- ---- ---- BL [NK LED PROCEDuRE FOR MFC RUN- [N TESTS
1; -------- -IF--L-E--D- -IS---O-N-, --T-U-R-N- IT OFF. IF OFF, TURN ON.
ASSllhIE OS :DATA
BL I NK 1NT - STI
PROC
NEAR
'NPUSH
MOV
AX
"L.PORT 8 AH,AL
SAVE AX REG CONTENTS READ CURRENT " ....L OF PORT B
NOT
AL
FLIP ALL BITS
AND AND
OR OUT
Al,O I 0000008 AH,I011ll11B AL,AH PORT 8 .....L
ISOLATE CONTROL BIT MASK OUT OF ORIGINAL VAL OR NEW CONTROL BI TIN
MOV
AL,EDI
OUT POP IRET
INTAOO,AL AX
, RESTORE AX REG
BLlNK_INT
ENDP
---- ; - OP;:; -~~~~-~~~~ ;~~ ~~~~;~~~;- o~~~-~~~-~o~~~~~ -;~o---
,I --IF---C-H-E-C-KS-U-M---IS---O-K-,--C-....-L-LS---IN--IT-/-T-E-S-T---C-O-D-E--IN---M-O-D-U-L-E----- I
ROM CHECK
PROC
NEAR
-
MOV
AX,DATA
, POINT ES TO DATA AREA
MOV
ES,AX
SUB
.... H . A H
ZERO OUT AH
MOV
AL, [BX+2]
GET LENGTH INOIC .... TOR
MOV
CL,09H
MULTIPLY BY 512
SHL
AX,Cl
MO"
CX,AX
SET COUNT
PUSH
CX
SA"E COUNT
MOV
CX,4
AD..JUST
SHR
AX.CL
ADD
OX,AX
SET PO 1NTER TO NEXT MODULE
PDP
CX
RETR I VE COUNT
CALL
ROS CHECKSUM CNT
DO CHECKS:.JM
,JZ
ROM-CHECK 1
C .... L L
ROM-ERR
, POST CHECKSUM ERROR
..IMP
ROI,CCHECK_ENO
, AND EXIT
ROM CHECK I:
-
PUSH
OX
I SAVE POINTER
POST (01/10/86) 5-101
IBM P.rsonal Compyter MACRO Assembl.r VerSion 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-19 0[-10-86
2041 1945 26: Cl 06 0067 R 0003 2048 194C 26: 8e IE 0069 R 2049 1951 26: FF IE 0061 R 2050 1956 SA
"OV "OV CALL POP
ESIOIO ROM INIT,0003H I LOAD
ES:OIO-ROM-SEG,DS
I LOAD
DWORD PTR ES1010 ROM INIT
OX
-
OFFSET SEGMENT
; CALL
INIT./TEST
ROUTINE
2051 1951
ROM CHECK ENO:
2052 1957 C3 2053 1958 2054
-
RET
ROM_CHECK
ENDP
; RETURN TO CALLER
2055 2056
; ---- ---- -~~~~~~; -~~~-;~ ~ ~;-~;~~~-~O~~---
-------~
2051 2058 2059 2060
1958
I
AL MUST CONTAIN NUMBER TO BE CONVERTED. I
I
AX ANO BX DESTROYED.
~;~-~;~~--------;~~~----~~~~---------------------
2061 1958 50 2062 1959 Bl 04 2063 195B 02 E8 20&4 1950 E8 1963 R 20&5 1960 58
2066 1961 24 OF 2061 20&8 1963 20&9 1963 04 90 2010 1965 27 2011 1966 14 40 2012 1968 21 2013 1969 2014 1969 B4 OE
2015 1968 Bl 00 2016 1960 CD 10 2011 196F C3
-
PUSH
MOV
SHR
CALL
POP
AND
XLAT PR PROC
-
ADO
OAA
AOC
OAA
PRT HEX PROC
-
MOV
NOV
INT
RET
AX CL,4 AL, CL XLAT PR AX "'L,OFH
NEAR AL,090H
AL.040H
NEAR "'H,14 BH,O IOH
; SAVE FOR LOW NIBBLE DISPLAY I SHIFT COUNT , NYBBLE SWAP
DO THE HIGH NIBBLE DISPLAY RECOVER THE NIBBLE ISOL ... TE TO LOW NIBBLE FALL INTO LOW NIBBLE CONVERSION
CONVERT OO-OF TO ASC I I CHARACTER ADO FIRST CONVERSION F"'CTOR ADJUST FOR NUMERIC AND ALPHA R ...NGE ADO CONVERS I ON AND A~JUST LOW NIBBLE ADJUST HIGH NIBBLE TO ASCHI RANGE
DISPLAY CHARACTER IN AL
I CALL VIDEO_IO
2018 1910 2019 1970
PRT HEX ENDP XLAT PR ENDP
2050 1910 2081
XPCJ!hTE
ENDP
2082 2083 2084 20155
2086 2081
1910 1910 1912 1914 1916
038C 0318 021e
F4
LABEL WORD
OW
3BCH
OW
37eH
OW
2l8H
LA8EL WORD
I PRINTER SOURCE TABLE
2088 2089
:-~~ ~;-;~;~~~;~ ~~-;7~~ -;~ ~~;-;-;~~~~~~ -~~-;~~-~~ ~;~~;---~
2090
2091 2092 2093 2094 2095 2096
1916
I
: ENTRY REQUIRE~ENTS:
I
= SI OFFSET'AODRESS) OF t.4ESSAGE BUFFER
I
CX = MESSAGE BYTE COUNT
r
;
-
~
-
---
-M- -AX--I ~-U-M---M-E-SS--A-GE--
-- LENGTH
-- ---
IS
--
-3-6---CH--AR-A--C-TE-R-S--
-
-
--
-
-
--
I
E MSG PROC
NEAR
2091 2098 2099 2100 2101 2102
2103 2104 2105 2106 2101
210e 2109
21 10 2111 2112 2113
2114 2115
[976 88 EE 1918 E8 1991 R 1918 IE 191C E8 IAI2 R 197F AO 00 lOR 1982 24 0 I
1984 75 OF 1986
1986 FA 1987 BO 89 1989 E6 63
19158 BO 85 [980 E6 61
[98F AO 0015 R 1992 E6 60 1994 F4 1995
1995 IF 1996 C3
-
MOV
CALL
PUSH
CALL
MOV
AND
JNZ
~FG HAL. T:
-
CLI
G12:
"OV OUT NOV OUT NOV OUT HL T
POP RET
BP,SI P t.4SG OS DOS AL,BYTE AL.,OIH G 12
PTR
.EQUIP FL...G -
SET BP NON-ZERO TO FLAG ERR PRINT MESSAGE
LOOP/MALT ON ERROR S.ITCH ON? NO - RETURN
AL,e9H CMD PORT .AL AL,To000101B PORT B.AL AL. p~FG ERR FLAG PORT_A,AL -
as
, YES - HALT SYSTEM
I DISABLE KB RECOVER ERROR INDICATOR SET INTO 8255 REG HALT SYS
2116 1991
E_MSG ENDP
2117
2118 1991 2119 1991
P MSG cT2AI
PROC
NEAR
2120 2121 2122 2123 2124
2125 2126 2121
1991 2EI 8A 04 199A 46 199B 50 199C E8 19&9 R 199F 515 19AO 3C OA 19A2 15 F3 19A4 C3
"OV INC PUSH
C ...LL POP CNP
"NE RET
"'L,CS: (SI ] 51 AX PRT HEX AX -
AL,IO
GI2A
PUT CHAR IN AL PO I NT TO NEXT CH ... R
S"'VE PRINT CHAR CALL VIDEO 10 RECOVER PRTNT CH"'R
....S IT L.INE FEED? I NO,KEEP PRINTING STRING
2128 2129 2130 2131 2132 2133 2134
2135 2136
19A5
ENOP
- -- - --- ; -----
-- - -- --- ------------ "'SSUME CSICOOE,DS:D"'T'"
- ~- - - -------------
-----
-- - -
------ ---
--
THIS PROCEDURE WILL ISSUE LONG TONES (1-3/4 SECONDS) AND ONE OR I
MORE SHORT TONES (9/32 SECOND) TO INDICATE A FAILURE ON THE
PLAN"'R BOARD. A 8AO MEMORY MODULE, OR A PROBLEM WI TH THE CRT.
ENTRY PARAMETERS:
I
= OH = NUMBER OF LONG TONES TO BEEP.
OL NUMBER OF SHORT TONES TO BEEP.
2 I 31 213e
I - - - - --- - - - - - -- -- - - --- - -- -- - - - - - -- - --- --- - - - - - - - - - - - - - - - -- - - - - - - - - --
2139 19A~ 2140 19A5 9C 2141 19A6 F ...
2142 19A1 OA F6 2143 19A9 14 IE 2144 19A8 2145 19A8 B3 10 2146 19AD B9 0500 2141 1980 E8 OC!5C R 2148 [9B3 89 C233 2149 19B6 E8 OCAO R 2150 19B9 FE CE 2151 19B8 15 EE 2152 1980 IE 2153 198E Ee IAI2 R
.- 2154 19C1 eo 3E 0012 R 01
2155 19C6 2156 19C7 14 BD 2151 19C9
2158 19C9 83 12 2159 19CB 89 04B8 2160 I 9CE E8 OC5C R
ERR_BEEP PUSHF CLI OR
"Z Gl :
NOV
"OV CALL
"OV CALL OEC "NZ PUSH
CALL
C"P POP
"E
G3:
NOV
"OV CALL
PROC
NEAR
DH,DH 03
BL,112 CX,1280 8EEP CX,49115 WAITF OH 01
os
DOS
Pt.4FG_TST.OIH
as
MFG_HALT
BL.18 CX,I208 BEEP
I S"'VE FLAGS
I DISABLE SYSTEM INTERRUPTS
I ANY LONG ONES TO BEEP I NO, 00 THE SHORT ONES
I
LONG BEEPS
I COUNTER FOR LONG BEEPS (1-3/4 SECONDS)
,I OIVISOR FOR 932 HZ
I DO THE 8EEP 2/3 SECOND DELAY AFTER LONG BEEP
DELA Y BETWEEN BEEPS
ANY MORE LONG BEEPS TO DO
LOOP TILL DONE
SAVE OS REGISTER CONTENTS
MANUFACTURING lEST MODE?
RESTORE OR I G I N ... L CONTENTS OF (OSI YES - STOP BL I NK I NG LED
SHORT BEEPS COUNTER FOR A SHORT 8EEP (9/32) DIVISOR FOR 981 HZ 00 THE SOUND
~
5-102 POST (01/10/86)
IBM Personal Computer MACRO Assembler Version 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-20 01-10-86
Zlbl 21 b2 21b3 ZIb4 2165
21&& 21&7 21&8 2169
2170 2171
2172 2173 2174
2175 2176 2177 2178 2119 2180 2181 2182 2183 2184 2185 2186
2187 2188 2189
2190 2191 2192 2193 2194
2195 2196 2197 2198
2199 2200 2201
2202 2203 2204
2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 221 & 2217 2218
2219 2220
2221 2222 2223
2224 2225 2226 2227 2228 2229
2230 223' 2232 2233 2234 2235 2236 2231 2238
2239 2240 2241
2242 2243 2244 2245
224£1 2247 2248 2249
2250 2251 2252 2253 2254 2255 225£1 2251 2258 2259 22bO 2261 2262 2263 2264
2265 226£1 2261 2268 2269
2270 2211 2212 2213 2214
1901 B9 8178 1904 E8 OCAO R 1907 ~E CA 1909 75 EE 1908898178 190E E8 OCAO R 19EI 90 19E2 C3 19E3
19E3
19E3 BO 08 19E5 Eb bl 19E7 B9 2956 19EA 19EA E2 FE 19EC BO C8 19EE Eb 61 19FO 19FO BO 48 19F2 E6 61 19F4 BO ~D 19~6 Eb 21 19F8 C6 06 046B R 00 19FO FB 19FE 28 C9 IAOO I AOO F6 06 0468 R 02 I A05 75 02 'A01 E2 ~1 'A09 IA09 E4 £10 IAOB 8A 08 IAOO BO C8 'AOF Eb 61 IAII C3 'A12
I A 12 IAI2 2E= 8E IE IA'8 R IA 17 C3
---- R
IA,A
IAIA
IAIA FB IAIB IE lAIC 50 lAID 52 IAIE B8 ---- R I A2 I 8E 08 1A23 FF 06 006C R I A21 75 04 I A29 FF Ob OO&E R
'A20 I A2D 83 3E 006E R 18 IA32 75 19
1A34 81 3E 006C R OOBO IA3A 15 II
IA3C 2B CO
IA3E A3 OObE R 'A41 A3 006C R · A44 C6 A. 0070 R 01 IA49 FF A. OOCE R
,. IA4D
IA4D FE OE 0040 R
IA51
OB
IA53 80 2. 003F R FO
IA58 80 OC
I ASA 8A 03F2
I A50 EE
lASE {A5E CD IC
'A60 FA IA&I .0 20
IA&3 E6 20
lA&5 SA ,,1,66 58 I Abl IF 1,1,68 CF
IAb9
MOV
CX,33144
I 1 /2 SECOND DELAY AFTER SHORT BEEP
CALL
WAITF
I DELAY BETWEEN BEEPS
DEC
OL
I DONE W' TI-I SHORT SEEPS COUNT
"NZ MOV
03 CX,33144
I LOOP TILL DONE I 1/2 SECOND DELAY AFTER LAST BEEP
CALL
WA ITF
I MAKE I T ONE SECOND DELAY BEFORE RETURN
POPF
I RESTORE FLAGS TO ORIGINAL SETTINGS
RET
I RETURN TO CALLER
ERR_BEEP
ENDP
; -----------------------------------------------------------------------
;
THIS PROCEDURE WILL SEND A SO~TWARE RESET TO THE KEYBOARD.
;
SCAN CODE 'AA' SHOULO BE RETURNED TO THE CPU.
I
I - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- -- - -- - -- - - - - - - - - - - ------ - - - --------- - - - --
KBD RESET
PROC
NEAR
-
ASSUME DSIABSO
MOV
AL,08H
I SET KBD CLK LINE LOW
~~~ ~~~~o~a~L
I WR I TE 8255 PORT 8 I HOLD KBD CLK LOW FOR 20 MS
Ci8:
LOOP
08
LOOP FOR 20 "'IS
MOV
AL,OC8H
SET CLK, ENABLE LINES HICiH
OUT
SP TEST I
-
MOV
PORT_B,AL AL,48H
ENTRY FOR MANUFACTURING TEST 2 SET KBD CLK HIGH, ENABLE LOW
OUT MOV
~~~6F'g;t"L
I ENABLE KEYBOARD INTERRUPTS
OUT
MaV STI
INTAO',AL
, WRITE 8259 Ih4R
DATA_AREA [ .. I NTR_FLAG-OAT ~4~~;'~E I I~~~~~U~~~ERRUPT I NDI CATOR
SUB
CX,CX
G9:
I SETUP INTERRUPT TIMEOUT CNT
G10;
TEST
"NZ LOOP
g~ 6A_AREA[ III NTR_FLAG-DAT~4~~S O:HR~Ag I ~C~NK~6~~A~~T~~~~DOCCUR?
G9
I NO - LOOP TILL TI MEOUT
IN MOV
~t:~~RT_A
READ KEYBOARD SCAN CODE SAVE SCAN CODE .JUST READ
MOV
OUT
AL,OC8H PORT_8,AL
CLEAR KEYBOARD
RET
I RETURN TO CALLER
KBD_RESET
ENDP
ODS
PROC MOV
RET
DOSDATA OW
DDS
ENDP
NEAR OS,CSIDDSDATA
DATA
,
LOAD {OS) TO DATA AREA
I PUT SEGMENT VALUE OF DATA AREA ] NTO OS
I RETURN TO USER W'TH IDSf,. DATA
I SEGMENT SELECTOR VALUE FOR DATA AREA
- HARDWARE INT OB H -- ( IRQ LEVEL 0 ) -------------------------------------
THIS ROUTINE HANDLES THE TIMER INTERRUPT FROM FROM CHANNEL 0 OF TIo£ 8254 TIMER. INPUT FREQUENCY IS 1.19318 MHZ AND THE DIVISOR ]S 6553£1, RESULTING IN APPROXIMATELY 18.2 INTERRUPTS EVERY SECONO.
THE INTERRUPT HANDLER MAINTAINS A COUNT (40IbC) OF INTERRUPTS POWER ON TltE, WHICH MAY BE USED TO ESTABLISH TIME OF DAY. THE INTERRUPT HAI'.DLER ALSO DECREMENTS THE MOTOR CONTROL COUNT OF THE 0 I SKETTE, AND WHEN I T EXP I RES, WI LL TURN OF~ THE DISKETTE MOTORls), AND RESET THE MOTOR RUNNING FLACiS. THE I NTERRUPT HANDLER WI LL ALSO I NVOKE A USER ROUT I NE THROUGH INTERRUPT ICH AT EVERY TIME TICK. THE USER MUST CODE A
ROUTINE AND PLACE THE CORRECT ADDRESS IN THE VECTOR TABLE.
SINCE (40140f
ASSUME CS;CODE,OSIOATA
TIMER INT ! - STI
PUSH PUSH PUSH MOV MOV INC
"NZ INC T4: C.... "NZ CMP
"NZ
PROC NEAR
OS AX OX AX ,DATA DS,AX liT IMER LOW T<
IITIMER_HIGH
~~IMER_HIGH,O 18H
..TIMER LOW,OBOH
T.
I I NTERRUPTS BACK ON
SAVE MACHINE STATE GET ADDRESS O~ DATA SEGMENT ESTABLISH ADORESSA81LITY · NCREMENT T I ME
GO TO TEST DA Y INCREMENT RIGH WORD O~ TIME
TEST DAY TEST FOR COUNT EQUAL I NG 24 HOURS GO TO 0 I SKETTE_ CTL
co I
TO DISKETTE_CTL
T I MER HAS GONE 24 HOURS
SUB MOV MOV
MOV INC
AX,AX "TIMER_HIGH,AX _T]MER_LOW,AX
"TlMER_O~L,1 IIOAY_COUNT
I CLEAR T I MER COUNT HIGH I AND LOW
I SET T I MER ELAPSED 24 HOURS FLAG I INCREMENT ELAPSED DAY COUNTER
TEST ~OR DISKETTE TIME OUT
T5:
DEC
"MOTOR_COUNT
"NZ AND
T' . .MOTOR _STATUS.O~OH
MOV
AL,OCH
MOV
DX,03F2H
OUT
DX,AL
T6:
INT
ICH
CLI MOV
OUT POP POP POP IRET
AL,EDI INTAOO,AL OX AX OS
- - TIMER INT I
ENaP
I DECREMENT DISKETTE MOTOR CONTROL I RETURN I F COUNT NOT OUT I TURN OFF MOTOR RUNNING BITS
I FOC CTL PORT I TURN O~~ THE MOTOR
T I MER TICK INTERRUPT TRANSFER CONTROL TO A USER ROUTI NE
o I SABLE [NTERRUPTS TILL STACK
GET END OF I NTERRUPT MASK
END OF I NTERRUPT TO 8259 - 1
RESTORE (OX)
CLEARED
I RESET MACHINE STATE I RETURN ~ROM ] NTERRUPT
POST (01/10/86) 5-103
IBM Peraon.1 COlllputer MACRO Asselllbl.r Veralon 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-21 OI-10-8f>
2215 2216 2217 2218 2279 2280 2281 2282 2283 228~ 2285 2286
2281 2288 2289
2290 2291 2292 2293 229~ 2295 2296 2297 2298 2299 2300 2301 2302 2303 230~ 2305 2306 2301 2308 2309 2310 2311 2312 2313 231~ 2315
2316 2317 2318 2319 2320 2321 2322 2323 2324 2325
2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337
2338 2339 2340 2341
2342 2343 2344 2345 2346 2341 23~8 2349 2350 2351 2352 2353 235~ 2355 2356 2351 2358 2359 2360 2361 2362 2363
2364 2365 2366 2367 23f>8 23f>9 2370 2371 2372 2373 2374 2315 2376 2377 2378 2379 2380
2381 2382 2383 238~ 2385 2386 2387 2388
PAGE
; ------
---- ----- - ---.---._----------------- ;
;
--- CHARACTER GENERATOR GRAPHICS FOR 320X200 "'NO 6~OX200 GR"'PHICS
--- -- -------- -------
-----------
I A6E
I
ORG
OFA6EH
ORG
0 I A6EH
1A6E
CRT CHAR GEN
LABEL BYTE
IA6E 00 00 00 00 00 00
-
DB
00 00
OOOH,OOOH,OOOH,OOOH,OOOH,OOOH,OOOH,OOOH I 0_00
BLANK
IA76 7E 81 A5 81 BO 99 81 7E
DB
07EH,08IH,OA5H,08IH,OBDH,099H,08IH,07EH I 0_01
SMILING FACE
1",7E ~~ ~~ 08 FF C3 E7
DB
Q7EH,OFFH,OOBH,OFFH,OC3H.OE7H,OFFH,07EH I 0_02
SMILING FACE N
IA86 ~~ ~~ FE FE 7C 38
DB
06CH,OFEH,OFEH,OFEH,07CH,038H,OlOH,OOOH I 0_03
HEART
IA8E 1038 7C FE 1e 38 10 00
1,\9638 7C 38 FE FE 7C 38 7C
IA9E ~~ i~ 38 7C FE 7C
gg gg IAAb
18 3C 3C 18
DB
010H,038H,07CH,OFEH,07CH,038H,OIOH,OOOH 'D_O~
DIAMOND
DB
038H,07CH,038H,OFEH,OFEH,07CH,038H,07CH I 0_05
CLUB
DB
010H,OlOH,038H,07CH,OFEH,07CH,038H,07CH I 0_06
SPADE
DB
OOOH,OOOH,018H,03CH,03CH,OI8H,OOOH,OOOH I 0_07
8ULLET
IAAE FF FF E7 C3 C3 E1 FF FF
IABb ~g ~g. 66424266
DB
OFFH,OFFH,OE7H,OC3H,OC3H,OE7H,OFFH,OFFH I 0_08
BULLET NEG
DB
OOOH,03CH,066H,042H,O~2H,Ob6H,03CH,OOOH I 0_09
CIRCLE
IABE FF C3 99 Bo BO 99 C3 FF
IAC6 OF 07 OF 10 CC CC CC 78
I .... CE 3C 6b b6 66 3C 18 7E 18
IAD6 3F 33 3F 30 30 70 FO EO
lADE 1F 63 7F 63 63 67 E6 CO
IAE6 99 5A 3C E7 E7 3C 5 .... 99
DB
OFFH,OC3H,099H,OBDH,080H,099H,OC3H,OFFH I 0_0'"
CIRCLE NEG
08
00FH,007H,OOFH,010H,OCCH,OCCH,OCCH,078H I O_OB
h4ALE
DB
03CH,066H,066H,066H,03CH,016H,01EH.016H I D_OC
FEMALE
DB
03FH,033H,03FH,030H,030H,070H,OFOH,OEOH I 0_00
EIGHTH NOTE
DB
07FH,063H,07FH,063H,063H,061H,OE6H,OCOH I D_OE
TWO 1116 NOTE
DB
099H,05AH,03CH,OE7H,OE7H,03CH,05AH,099H I O_OF
SUN
IAEE 80 EO F6 FE FB EO 80 00
I AF6 02 OE 3E FE 3E OE 02 00
IAFE 18 3C 7E 16 18 7E 3C 18
lB06 66 66 66 66 66 00 66 00
180E 7F DB DB 1B IB lB IB 00
1B16 3E 63 38 6C 6C 36 CC 78
181E 00 00 00 00 7E 7E 7E 00
lB26 18 3C 7E 18 7E 3C 18 FF
IS2E 18 3C 1E II! 18 16 18 00
1836 18 18 18 18 7E 3C 18 00
1B3E 00 18 OC FE OC 18 00 00
IB46 00 30 60 FE 60 30 00 00
IB~E 00 00 co Co CO FE
00 00 1856 00 24 66 FF 66 2~
00 00 185E 00 18 3C 7E FF FF
00 00 IB66 00 FF FF 7E 3C 18
00 00
DB
080H,OEOH,OF8H,OFEH,OF6H,OEOH,OBOH.000H I 0_10
R ARROWHE .... O
DB
002H.00EH,03EH,OFEH,03EH,OOEH,002H,OOOH I 0_11
L ARROWHEAD
DB
016H,03CH,07EH,Ol8H,Ol6H,07EH,03CH,Ol8H I 0_12
ARROW 2 VERT
DB
066H,066H,066H,066H,066H,OOOH,066H,OOOH I 0_13
2 E)(CLAh4 .... TIONS
DB
07FH,OOBH,OOBH,078H,Ol8H,OlBH,Ol8H,OOOH I 0_14
PARAGRAPH
DB
03EH,063H,038H,06CH,06CH,038H,OCCH,076H ; 0_15
SECTION
DB
OOOH,OOOH,OOOH,OOOH,07EH,07EH,07EH,OOOH I 0_16
RECT ....NGLE
DB
018H,03CH,07EH,Ol8H,07EH,03CH,Ol6H,OFFH I 0_'7
"'RROW 2 VRT UP
08
OlBH,03CH,07EH,016H,018H,Ol8H,018H,OOOH I 0_18
ARROW VRT UP
08
0IBH,OI6H,OI8H,OI8H,07EH,03CH,OI6H,000H I 0_'9
ARROW VRT DOWN
DB
000H.018H,OOCH,OFEH,OOCH,OI8H,OOOH,OOOH I O_'A
"'RROW RIGHT
08
000H,030H,060H,OFEH,060H,030H,OOOH,OOOH I O_IB
ARROW LEFT
08
OOOH,OOOH,OCOH,OCOH,OCOH,OFEH,OOOH,OOOH I D_1e
NOT INVERTED
DB
OOOH. 024H, 066H, OFFH, 066H, 024H, OOOH, OOOH I 0_10
ARROW 2 HORl
DB
OOOH,OI8H,03CH,07EH,OFFH,OFFH.000H,OOOH I D_'E
ARROWHEAD UP
DB
000H,OFFH,OFFH,OlEH,03CH,Ol6H,OOOH,OOOH I O_'F
ARROWHEAD DOWN
!a6E 00 00 00 00 00 00 00 00
IB76 30 78 18 30 30 00 30 00
187E 6C 6C 6C 00 00 00 00 00
lB66 6C 6C FE 6C FE 6C 6C 00
IB8E 30 1C CO 18 OC F8 30 00
I B96 00 C6 CC 18 30 66
C6 00 lB9E 38 6C 38 76 DC CC
7f> 00 IB.... 6 60 60 CO 00 00 00
00 00 IBAE 18 30 60 60 60 30
'8 00
I BB6 60 30 18 18 18 30 60 00
18BE 00 66 3C FF 3C 66
00 00 18C6 00 30 30 FC 30 30
00 00 !BCE 00 00 00 00 00 30
30 60 lB06 00 00 00 FC 00 00
00 00 IBOE 00 00 00 00 00 30
30 00 18E6 Of> OC 18 30 60 CO
80 00
DB
OOOH,OOOH,OOOH,OOOH,OOOH,OOOH,OOOH,OOOH I 0_20
SPACE
DB
030H,078H,078H,030H,030H,OOOH,030H,OOOH I 0_21
E)(CLAh4ATION
DB
06CH,06CH,06CH,OOOH,OOOH,OOOH,OOOH,000H I 0_22
QUOT.... TION
DB
06CH,ObCH,OFEH,06CH,OFEH,06CH,06CH,OOOH I 0_23' LB,
08
030H,07CH,OCOH,078H,OOCH,OF8H,030H,OOOH I 0_24' DOLLAR SIGN
DB
OOOH,OC6H,OCCH,OI8H,030H,066H.OC6H,OOOH I 0_25 X PERCENT
DB
038H,06CH,03BH,016H,OOCH,OCCH,076H,OOOH I 0_26 & Ah4PERSANO
DB
060H, 060H, aCOH. OOOH, OOOH, OOOH, OOOH. OOOH I 0_27
APOSTROPHE
DB
0lBH,030H,060H,060H,060H,030H,Ol8H,OOOH I 0_28! L. PARENTHESIS
08
060H,030H,OIBH,OI6H,OI8H,030H,060H,OOOH I 0_29) R. PARENTHESIS
DB
000H,066H,03CH,OFFH,03CH,066H,OOOH,OOOH I D_2A
ASTERISK
08
OOOH,030H,030H,OFCH,030H,030H,OOOH,OOOH I 0_28 + PLUS
DB
000H,OOOH,OOOH,OOOH,OOOH,030H,030H,060H I 0_2C, COt.4MA
DB
OOOH,OOOH,OOOH,OFCH,OOOH,OOOH,OOOH,OOOH I 0_20 - DASH
DB
OOOH,OOOH,OOOH,OOOH,OOOH,030H,030H,OOOl-l I 0_2E. PERIOD
08
006H,OOCH,OI8H,030H,060H,OCOH,080H,OOOH I D_2F / SLASH
IBEE 1C Cb CE DE F6 E6 7C 00
IBF6 30 10 30 30 30 30 FC 00
lBFE 78 CC OC 38 60 CC
FC 00 IC06 78 CC OC 38 OC CC
76 00
DB
07CH,OC6H,OCEH,ODEH,OF6H,OE6H,07CH,OOOH , 0_30 0
DB
030H,070H,030H,030H,030H,030H.OFCH,OOOH I 0_31 I
DB
078H,OCCH,OOCH,03BH,060H,OCCH,OFCH,OOOH I 0_32 2
DB
078H,OCCH,OOCH,038H,OOCH,OCCH,078H,OOOH I 0_33 3
5-104 POST (01/10/86)
18104 P ... "onlll Compute .. M"CRO " ·· embl... V... "ion 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-22 01-10-86
2389 ICOE Ie 3e 6C CC FE OC
2390
IE 00
2391 ICI6 FC CO F8 DC OC CC
2392
78 00
2393 IC1E 38 60 CO F8 CC ee
2394
78 00
2395 IC26 FC CC oe 18 30 30
2396
30 00
2397 lC2E 78 CC CC 78 CC CC
2398
7. 00
2399 IC36 78 CC CC IC OC 18
2400
70 00
2401 lC3E 00 30 30 00 00 30
2402
30 00
2403 IC46 00 30 30 00 00 30
'. 2404
30 00
2405 lC4E 18 30 60 CO .0 30
2406
00
2407 lC56 00 00 Fe 00 00 Fe
2408
00 00
2409 IC5E .0 30 18 oe 18 30
2410
.0 00
2411 IC66 78 CC oe 18 30 00
2412
30 00
2413
2414 lC6E 7C C6 DE DE DE CO
2415
7. 00
2416 lC76 30 7. CC CC FC CC
2417
ee 00
.. 2418 IC7E Fe 66
7e
·· ·· 2419
Fe 00
.. .. 2420 IC86 3C
co co co
2421
3e 00
.. ·· .. 2422 lC8E F8 .e
· e
2423
F8 00
2424 1C96 FE .2 .8 70
· 2
·· 2425
FE 00
2426 lC9£ FE .2
18 68 .0
·· 2427
FO 00
.. 2428 IC"6 3e
co CO CE 66
2429
3E 00
2430 lCAE CC CC CC FC CC ee
243'
ee 00
2432 IC86 78 30 30 30 30 30
2433
7. 00
2434 ICBE IE OC oe OC CC CC
2435
78 00
2436 ICC6 E6 66 .e 78 6C 66
2431
E. 00
2438 ICCE Fa 60 .0 60 62 66
2439
FE 00
2440 I CD6 C6 EE FE FE 06 C6
2441
e. 00
2442 ICoE C6 E6 FlO DE CE C6
2443
e. 00
2444 lCE6 38 6C C6 C6 C6 .e
2445
3. 00
2446
2447 ICEE Fe
lC 60 60
·· ·· 2448
Fo 00
2449 ICF6 18 CC CC CC DC 7.
2450
Ie 00
.. .. .. 245, ICFE FC
IC 6C
2452
Eo 00
2453 ,006 78 CC EO 70 IC CC
2454
78 00
2455 lo0E FC 84 30 30 30 30
2456
7. 00
2451 1016 ee CC CC CC CC CC
2458
Fe 00
2459 IDlE CC CC CC CC CC 78
2460
30 00
2461 1026 e. C6 C6 06 FE EE
2462
e. 00
2463 ,02E C6 C6 6C 38 38 .e
2464
Co 00
2465 1036 CC CC CC 7. 30 30
·· 2466
7. 00
2461 103E FE C6 8e 18 32
2468
FE 00
,. 2469 1046 78 00 .0 .0 .0 .0
2410
7. 00
2411 I04E CO 00 30 I. oe 00
2412
02 00
2413 1056 78 18 18 18 18
2474
78 00
2475 lOSE 10 38 6C C6 00 00
2416
00 00
,. 2411 1066 00 00 00 00 00 00
2478
00 FF
2479
2480 106E 30 30
00 00 00
2481
00 00
2482 1016 00 00 78 oe 7e cc
·· 2483
7. 00
2484 IDlE EO 60 .0 lC 66
2485
DC 00
2486 1086 00 00 7. CC CO ee
2481
78 00
2488 I08E Ie oe oe 7C CC CC
2489
7. 00
2490 1096 00 00 18 CC Fe co
2491
7. 00
.. 2492 IME 38 6C 60 FO .0 .0
2493
FO 00
2494 10"6 00 00 7. CC CC 7e
2495
oe F.
2496 10AE EO .0 .e 16 66
2491
E. 00
2498 1086 30 00 70 30 30 30
2499
78 00
2500 lOBE OC 00 OC OC OC CC
·· 2501
ee 7.
2502 IOC6 EO .0
.e 78 .e
08
01 CH, 03CH, 06CH, OCCH, OFEH, OOCH, a 1EH, OOOH 1 0_344
08
· OFCH, OCOH, OF8H, OOCH, OOCH, OCCH, 078H, OOOH 1 0_35
08
· 038H, 060H, OCOH, OF8H, OCCH. OCCH. 078H, OOOH 1 0_36
08
OFCH, OCCH, OOCH, a 18H, 030H I 030H I 030H, OOOH 1 0_37 7
08
· 018H, OCCH, OCCH, 078H, OCCH. OCCH, 018H, OOOH 1 0_38
08
- · 018H, OCCH, OCCH, 07CH, OOCH, 0 18H, 070H, OOOH 1 0 3.
DB
- OOOH, 030H, 030H, OOOH, OOOH, 030H, 030H. OOOH I 0 3A 1 COLON
08
OOOH, 030H, 030H, OOOH. OOOH, 030H, 030H. 060H I 0_38 I SEMICOLON
08
01 8H, 030H, 060H, OCOH, 060H, 030H, 0 18H, OOOH I 0_3C < LESS THAN
08
· OOOH I OOOH, OFCH, OOOH, OOOH, OFCH, OOOH, OOOH I o_30
EQUAL
08 08
, 060H I 030H, 0 18H, OOCH, 0 16H, 030H, 060H, OOOH I 0_3E > GREATER TH"N
078H. OCCH, OOCH, a 18H, 030H I OOOH, 030H, OOOH I 0_3F
QUESTION h4ARK
08
OICH, OC6H, OOEH. OOEH. OOEH. OCOH, 018H, OOOH I 0_40 · AT
08
030H, 0 78H. OCCH, OCCH, OFCH, oeCH, OCCH, OOOH 1 0_41 A
08
OFCH. 066H, 066H, OICH, 066H. 066H, OFCH. OOOH I 0_42 8
DB
- 03CH, 066H, OCOH. OCOH, OCOH, 066H, 03CH. OOOH I 0 '3 e
08
OF8H. 06CH. 066H I 066H I 066H, 06CH, OF8H, OOOH I 0_44 0
08
OFEH, 062H, 068H. 07 8H I 068H, 062H, OFEH I OOOH I 0_45 E
DB
OFEH, 062H, 068H, 018H. 068H, 060H. OFOH, OOOH I 0_46 F
08
03CH, 066H, OCOH. OCOH, OCEH, 066H, 03EH, OOOH I 0_41 G
08
OCCH, OCCH, OCCH, OFCH, OCCH, OCCH. OCCH, OOOH I 0_48 H
DB
o 78H, 030H, 030H, 030H. 030H, 030H, 018H, OOOH I 0_49 I
08
0' EH. OOCH, OOCH, OOCH, OCCH, OCCH, 078H. OOOH I 0_4A .J
08
OE6H I 066H, 06CH, 018H, 06CH, 066H, OE6H, OOOH 1 0_48 K
08
OFOH I 060H I 060H, 060H, 062H, 066H, OFEH, OOOH I 0_4C L
08
oe6H. OEEH I OFEH, OFEH, 006H, OC6H, OC6H. OOOH I 0_40104
08
OC6H, OE6H, OF6H, OOEH, OCEH, OC6H, OC6H, OOOH I 0_4E N
DB
038H, 06CH. OC6H, OC6H, OC6H. 06CH, 038H, OOOH I 0_4F 0
08
OFCH. 066H, 066H, 07CH, 060H, 060H, OFOH, OOOH I 0_50 P
DB
018H, OCCH, OCCH I OCCH, OoCH, 078H, a 1CH, OOOH I 0_51 Q
DB
- OFCH, 066H. 066H I 0 lCH I 06CH, 066H, OE6H, OOOH I 0 52 R
DB
018H, OCCH. OEOH. 0 10H I a 1CH, OCCH, 018M, OOOH I 0_53 5
DB
OFCH, 084104, 030H, 030H, 030H, 030H. 018H, OOOH 1 o_54 T
DB
OCCH, oeCH, OCCH, OCCH, OCCH, OCCH, OFCH, OOOH 1 0_55 U
08
OCCH, OCCH, OCCH, OCCH, OCCH, 018H, 030H, OOOH I 0_56 V
DB
· OC6H, OC6H, OC6H, 006H, OFEH, OEEH, OC6H, OOOH I 0_51
DB
- OC6H, OC6H. 06CH, 038H, 038H, 06CH. OC6H, OOOH I 0 5. X
DB
- eCCH, OCCH, OCCH, 078H, 030H, 030H I 078H, OOOH I 0 5. Y
DB
OFEH, OC6H, oeCH, a 18H, 032H, 066H I OFEH, OOOH I 0_5A Z
DB
018H, 060H. 060H I 060H, 060H, 060H, 018H, 000104 I 0_58 [ LEFT BRACKET
DB
OCOH, 060H, 030H ,Ot 8H. OOCH, 006H, 002H, OOOH I 0_5C \ 8ACK5LASH
DB
018H,O 18H, a 16H, 0 18H,O 18H,Ol8H,018H, OOOH I 0_50 [ RIGHT BRACKET
DB
- 01 OH, 038H, 06CH, OC6H, OOOH, OOOH, OOOH, OOOH I 0 5E A C I RCUNFLEX
DB
OOOH, OOOH I OOOH, OOOH, OOOH, OOOH, OOOH, OFFH I o_SF
UNDERSCORE
DB
030H, 030H, 0 18H, OOOH, OOOH I OOOH. OOOH, OOOH I 0_60
"POSTROPHE REV
DB
OOOH, OOOH. 078H I OOCH. OICH, OCCH, 076H, OOOH
I
0_61
·
DB
OEOH, 060H, 060H, 01CH, 066H, 066H. OOCH, OOOH 1 0_62 b
DB
OOOH. OOOH, 018H, OCCH, oeOH, OCCH I 018H, OOOH I o_63 e
DB
a I CH, OOCH, OOCH, OICH, OCCH, oeCH, 016H, OOOH I 0_64 d
DB
· OOOH, OOOH, 0 18H, aCCH, OFCH, OCOH, 018H I OOOH I 0_65
DB
038H, 06CH, 060H, OFOH, 060H, 060H, OFOH, OOOH I 0_66 r
DB
· OOOH, OOOH, 016H, OCCH, OCCH, 01CH, OOCH I OF8H I 0_61
DB
OEOH, 060H, 06CH, 076H, 066H, 066H, CE6H I OOOH I 0_68 h
DB
030H, OOOH. 070H, 030H, 030H, 030H, 018H, OOOH 1 0_69 1
DB
OOCH, OOOH, OOCH I OOCH. OOCH, OCCH, OCCH, 018H I D_6A I
DB
- OEOH, 060H, 066H, 06CH I 078H, 06CH, OE6H, OOOH I 0 .B k
POST (01/10/86) 5-105
IBM p.,.sonal Computer MACRO Assembl.,. V.,.aion 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-23 01-10-86
2503
E6 00
2504 IDCE 10 30 30 30 30 30
2505
18 00
2506 1006 00 00 CC FE FE 06
2507
C6 00
2508 lODE 00 00 F8 CC CC CC
2509
CC 00
2510 loE6 00 00 78 CC CC CC
2511
78 00
2512
2513 IDEE 00 00 DC 66 66 1C
2514
60 FO
2515 loF6 00 00 76 CC CC 1C
2516
OC IE
2517 loFE 00 00 DC 16 66 60
2518
FO 00
2519 IE06 00 00 7C CO 18 DC
2520
F8 00
2521 I EOE 10 30 1C 30 30 34
2522
18 00
2523 IEI6 00 00 CC CC CC CC
2524
16 00
2525 1EIE 00 00 CC CC CC 18
2526
30 00
2527 IE26 00 00 C6 06 FE FE
2528
6C 00
2529 lE2E 00 00 C6 6C 38 6C
2530
C6 00
2531 lE36 00 00 CC CC CC 1C
2532
OC F8
2533 IE3E 00 00 FC 98 30 64
2534
FC 00
2535 IE46 IC 30 30 EO 30 30
2536
lC 00
2531 lE4E 18 18 18 00 18 18
2538
18 00
2539 IE56 EO 30 30 IC 30 30
2540
EO 00
2541 1E5E 16 OC 00 00 00 00
2542
00 00
2543 lE66 00 10 38 6C C6 C6
2544
FE 00
08
010H,030H,0301-4,030H,030H,030H,018H,0001-4 I 0_6C I
08
000H,OOOH,OCCH,OFE1-4,OFEH,006H,OC6H,OOOH I 0_60 "'
08
000H,0001-4,OF81-4,OCC1-4,OCCH,OCCH,OCCH,OOOH I 0_6E n
08
000M,OOOH,018H,OCCH,OCCM,OCCM,078H,OOOH I 0_6F 0
DB
000H,OOOH,OOCH,066H,066M,07CM,060H,OFOH I 0_10 P
DB
000H,OOOH,016H,OCCH,OCCH,07CH,OOCM,OIEH I 0_11 q
08
000H,OOOH,OOCH,016H,066H.060H,OFOH,OOOl'" I 0_12 r
08
000H,OOOH,01CH,OC01-4,078H,OOCH,OF8H,OOOH I 0_13 II
08
010H,030H,01CH,030H,030H,034H,018H,OOOM I 0_14 t
08
000H,OOOM.OCCH,OCCH,OCCH,OCCH,016H,OOOM I 0_15 u
08
000H,OOOH,OCCH,OCCH,OCCH,018H,030H,OOOH I 0_76
09
OOOH,OOOH,OC6H,OD6M,OFEH.OFEH,06CH,OOOH I 0_71 w
08
OOOH, OOOH, OC6H, 06CH, 038M, 06CH, OC6H, OOOH I 0_18
08
OOOH,OOOH,OCCH,OCC1-4,OCCH,07CM,OOCH,OF8H I 0_19 Y
08
OOOH,OOOH,OFCH,098H,030H,064H,OFCH,OOOH I 0_1A 1
DB
0lCM,030H,030H,OEOH,030H,030M,OlCH,OOOH I 0_1B
LEFT BRACE
08
018H,OI8H,OI8H,000H,018H,OI8H.018H,OOOH I 0_1C I BROKEN STROKE
08
t OEOH,030H,030H,OlCH,030H,030H,OEOH,OOOH I 0_10
RIGHT BRACE
08
016H,ODCH,OOOH,0001-4,OOOH,OOOH,OOOH,OOOH I D_7E '" TILDE
08
000H,OIOH.038H,06CH,OC6H,OC6H,OFEH,OOOH I D_1F
DELTA
5-106 POST (01/10/86)
IBM Peraonal Computer MACRO A ·· embler Veraion 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-24 01-10-86
2545
2546 2541 2548
2549
2550 2551 2552
2553 2554
2555 2556 2557 2558 2559 2560 2561 2562 2563 2564
2565 2566 I E6E 2561 IE6E 2568 I E6E E9 0995 R 2569
2510
2511 IEA5
2572 lEAS 2573 IEA5 E9 IA\A R
2574 2575 2516 2577
2578 2579
2580 2581
2582 2583 2584 I EF3 2585 IEF3
2586 IEF3 lEA5 R 2581 IEF5 0987 R 2588 IEF1 lF23 R 2589 I EF9 1F23 R
2590 IEFB IF23 R 2591 IEFD IF23 R 2592 I EFF OF51 R 2593 IFOI IF23 R
2594 2595
2596 2597 I F03 1065 R
2598 I F05 1840 R 2599 I FO 1 1841 R 2600 I F09 OC59 R 2601 IFOB 0139 R 2602 IFOO 1859 R 2603 IFOF 082E R 2604 1F 1 I OFD2 R 2605 IFI3 0000 2606 IFI5 06F2 R 2601 IFll IE6E R 2608 IFI9 IF49 R 2609 IFIB IF49 R 2610 IFIO IOA4 R 2611 IFIF OFCl R
2612 IF21 0000 2613 2614
2615 2616 261 T 2618 2619
2620 2621
2622 2623 2624 IF23 2625 2626 IF23 IE 2627 IF24 E8 IAI2 R 2628 IF2T 50 2629 I F28 BO 08
2630 IF2A E6 20 2631 IF2C 90 2632 IF2D E4 20 2633 I F2F 8A EO 2634 IF31 OA C4
2635 I F33 75 04 2636 I F35 84 FF 2631 I F31 E8 OA 2638 I F39 2639 IF39 E4 21 2640 I F38 OA C4 2641 I F30 E6 21 2642 I F3F 80 20 2643 IF41 E6 20 2644 IF43 2645 I F43 88 26 006B R
2646 IF47 58 2647 IF48 IF 2648 IF49 2649 IF49 CF 2650 IF4A 2651
2652 2653 2654
2655 2656 I F53 2651 IF53 CF
PAGE
;--- lNT IA --------------------------------------------
; TIME OF DAY
I
; THIS ROUTINE ALLOWS THE CLOCI( TO 8E SETfREAD
INPUT
(AH 1 = 0
READ THE CURRENT CLOCI( SETTI NG
RETURNS CX .. HIGH PORTION OF COUNT
OX = LOW PORT I ON OF COUNT AL = 0 1FT I MER HAS NOT PASSED I
24 HOURS SINCE LAST READ
<>0 IF ON ANOTHER DAY
(AH' II I
SET THE CURRENT CLOCK
CX = HIGH PORT I ON OF COUNT
OX = LOW PORT I ON OF COUNT
NOTE: COUNTS OCCUR AT THE RATE OF
1193180/65536 COUNTS/SEC
I ;
-
-
-
-
-
-
--(O-R---A-B-OU- T---1-8-.-2--P-ER---S-E-C-O-ND-
-------S-E-E--E-QU- -A-TE-S--B--E-LO--W-'-
I
ASSUME CS:CODE ,DS:DATA
ORG ORG
OFE6EH
o IE6EH
TIME OF DAY:
- - JMP
TIME_OF_DAY_"
ORG ORG
OFEA5H
olEASH
TIMER_INTI
"MP
T I MER_I NT_I
: --------------- --- -----------------------------
; THESE ARE TI£ VECTORS WH I CH ARE MOVED INTO
; THE 8086 I NTERRUPT AREA OUR I NG POWER ON.
; ONLY THE OFFSETS ARE DISPLAYED HERE, CODE ; SEGMENT WI LL BE ADDED FOR ALL OF THEM. EXCEPT I
; WHERE NOTED.
I
1- - - - - - - - - ------ -------- -------- - --- ------ - - - - --
ASSUME CSICOOE
ORG
OFEF3H
ORG VECTOR TABLE
0lEF3H LABEL WORD
VECTOR TABLE VALUES FOR POST TESTS
- OW
OFFSET TIMER INT
INT 08H - HARDWARE TIMER 0
IRQ
OW
OFFSET I(B INT
I NT 09H - KEYBOARD
IRQ
OW
OFFSET DT 1
INT OAH
IRQ
OW
OFFSET 01 1
JNT OBH -
IRQ
OW
OFFSET 0 I 1
INT OCH -
IRQ
OW
OFFSET 0 I 1
OW
OFFSET DISK tNT
OW
OFFSET OJ ,-
INT OOH INT OEH - 01 SI(ETTE INT OFH -
IRQ IRQ IRQ
;----- SOFTWARE INTERRUPTS (BIOS CALLS AND POINTERS I
ow
OFFSET V IDEO 10
INT tOH -- VIDEO DISPLAY
OW
OFFSET EQU I P'ijENT
INT llH -- GET EQUIPMENT FLAG WORD
OW
OFFSET h4EMORY SIZE DET
!NT 12H -- GET REAL MODE MEMORY SIZE
OW
OFFSET DISKETTE 10-
INT 13H -- DISKETTE
OW
OFFSET RS232 10-
lNT 14H -- COMMUNICATION ADAPTER
DW
OFFSET CASSETTE 10
INT ISH -- EXPANDED BIOS FUNCTION CALL
DW
OFFSET KEYBOARD-I 0
INT 16H -- KEYBOARD INPUT
DW
OFFSET PRINTER To
I NT I TH - - PR I NTER OUTPUT
DW
OOOOOH
-
I NT 18H -- OF600H I NSERTED FOR BAS [C
OW
OFFSET BOOT STRAP
[NT 19H -- BOOT FROM SYSTEM MEDIA
DW
OFFSET TIME-OF DAY
[NT IAH -- TIME OF DAY
OW
OFFSET DUh4MY RETURN
lNT IBH -- KEYBOARD BREAK ADDRESS
OW
OFFSET DUMMY-RETURN
I NT t CH -- T I MER BREAK ADDRESS
OW
OFFSET V I OEO-PARMS
INT IOH -- VIDEO PARA~TERS
OW
OFFSET D I 51( BASE
I NT I EH - - 0 I SKETTE PARA~TERS
OW
OOOOOH
-
INT IFH -- POINTER TO VIDEO EXTENSION
; ---------------- ---- -- - - - - - ----------------------------
; TEMPORARY INTERRUPT SERV I CE ROUTI NE 1. THIS ROUTINE IS ALSO LEFT IN PLACE AFTER THE POWER ON 0 I AGNOSTI CS TO SERV I CE UNUSED INTERRUPT VECTORS. LOCATION 'INTR FLAG' WILL CONTAIN EITHERI 1. LEVEL OF HAROWARE INT. THAT I
CAUSED CODE TO BE EXEC. 2. 'FF' FOR NON-HARDWARE lNTERUPTS THAT WAS
- ---------------- EXECUTED ACCIDENTLY.
~ ~ ~ ----- ;~~~ - - - - - - ---~~;~--------------
ASSUME PUSH CALL PUSH NOV OUT NOP IN MOV
OR
"NZ MOV
"MP
OSIDATA OS DDS AX AL,OBH INTAOO,AL
AL,INTAOO AH,AL AL,AH HW INT AH-;-OFFH SHORT SET_INTR_FLAG
I SAVE REG AX CONTENTS I READ IN-SERVICE REG I (!="INO OUT WHAT LEVEL BEING I SERVICEOI I GET LEVEL I SAVE IT tOO? (NO HARDWARE ISR ACTIVE)
I SET FLAG TO FF IF NON-HOWARE
IN
OR OUT
SET
MOV
OUT I NTR FLAG:
'ijov
POP
POP
DUMMY RETURN; - IRET
011
ENDP
AL.INTAOI
AL,AH INTAOI,AL AL,EOI INTAOO.AL
.INTR FLAG,AH
AX
-
DS
GET MASK VALUE MASK OFF LVL BEING SERV ICED
I SET FLAG
I RESTORE REG AX CONTENTS
I NEED IRET FOR VECTOR TABLE
;-------- ------------------ ---------------------
I ;
-D-U-M-M-Y--R-E-T-U--RN--F-O-R-
--AD-D--R-ES-S-
-
C--O-M-P-A--T-IB-I-L-I-TY-----
---
-
I
1
ORG
OFF53H
ORG
0lF53H
IRET
POST (01/10/86) 5-107
IBM Personal Computer MACRO Assembler V.rs,on 2.00 POST ----- 01/10/86 SYSTEM POST AND BIOS PROCEDURES
1-25 01-10-86
2658 2659 2660 2661 2662 2663 2664 2665 2666 2661 2668 2669 2610 2611 2612 2613 2614 2615 2616 2611 2618 2619 2680 2681 2682 2683 2684 2685 2686 2681 2688 2689 2690 2691 2692 2693 2694 2695 2696 2691 2698 2699 2100 2101 2102 2103 2104 2105 2106 2101 2108 2709 2710 2711 2712 2713 2714 2715 2716 2111 2118 2119 2720 2121 2722 2723 2724 2725 2126 2121 2128 2129 2730 2131 2132 2133 2134 2135 2736 2737 2738 2139 2140 2741 2142 2143 2144 2145 2146 2747 2148 2149 2150 2151 2152 2753 2154 2155 Z156
'F54
IF54
IF54 IE IF55 E8 '1.'2 R I F58 80 3E 0 I 00 I F5D 14 1C I F5F C6 06 0100 I F64 FB 1F65 50 IF66 53 IF61 51 IF68 52 1F69 B4 OF IF6B CD 10
I F6D 8.1. CC I F6F 81. 2E 0084 1F13 FE C5
IF15 33 02 lF11 B4 02 IF79 CD 11 IF7B 80 F4 80 IF7E F6 C4 AO IF81 15 4E
IF83 E8 IFDD R IF86 51 !F87 B4 03 IF89 CD 10 !F8B 59 !F8C 52 IF8D 33 02
IFSF IFSF B4 02 1F91 CO 10 I F93 B4 08 1F95 CD 10 IF91 0.1. CO IF99 1S 02 I F9B BO 20 IF90 IF90 52 IF9E 33 02 IFAO 32 E4 IFA2 CD IT IFA4 5A IFA5 F6 C4 29 IFA8 15 22 IFAA FE C2 IFAC 3A CA IFAE 15 OF I FBO 32 02 IFB2 8A E2 I FB4 52 1FBS E8 IFOO R I FB8 SA IFB9 FE C6 1FBB 3A EE !FBD 7S DO
I FBF SA I FCO B4 02 I FCZ CD 10 1FC4 FA IFC5 C6 06 0100 IFCA EB OB
ROt R 0I R
R 00
PAGE
-- INT 05 H --------------------------------------------------------------- PR I NT SCREEN
-THIS LOGIC WILL BE INVOKED BY INTERRUPT 05H TO PRINT THE SCREEN. THE CURSOR POSITION AT THE TiME THIS ROUTINE IS INVOKED WILL BE
SAVED AND RESTORED UPON COMPLETION. THE ROUTINE IS INTENDED TO
RUN WITH INTERRUpTS ENABLED.
IF A SUBSEQUENT PRINT SCREEN KEY
IS DEPRESSED WHILE THIS ROUTINE IS PRINTING IT WILL BE IGNORED.
THE BASE PR' NTERS STATUS I S CHECKED FOR NOT BUSY AND NOT OUT OF
PAPER. AN INITIAL STATUS ERROR WILL ABEND THE PRINT REQUEST.
ADDRESS 0050:0000 CONTAINS THE STATUS OF THE PRINT SCREEN I
50: 0
a =:
'" I =: 255
PR INT SCREEN HAS NOT BEEN CALLED DR UPON RETURN FROM A CALL THIS INDICATES A SUCCESSFUL OPERATION.
PRINT SCREEN IS IN PROGRESS - IGNORE THIS REQUEST. ERROR ENCOUNTERED DURING PRINTING.
ORG ORG
OFF54H 0lF54H
PRINT_SCREEN_I PROC FAR
PUSH
OS
DELAY INTERRUPT ENABLE Till FLAG SET USE 004010100 FOR STATUS AREA STORAGE
CALL
DDS
GET STATUS BYTE DATA SECiMENT
CMP ..JE
.STATUS BYTE,I PR190
SEE IF PR I NT ALREADY I N PROGRESS EX I T IF PR I NT ALREADY IN PROGFi:ESS
MOV
.STATUS_BYTE,!
INDICATE PRINT NOw IN PROGRESS
STI
MUST RUN WITH I NTERRUPTS ENABLED
PUSH
AX
SAVE WORK REGISTERS
PUSH
BX
PUSH
CX
PUSH
OX
MOV
AH,OFH
WILL REQUEST THE CURRENT SCREEN MODE
lNT
10H
IAU: MODE
IAHI: NUMBER COLUMNS/LINE
IBH),. VISUAL PAGE
MOV
CL,AH
Will MAKE USE OF 'CX I REG I STER TO
MOV
CH,.ROWS
CONTROL ROWS ON SCREEN · COLUMNS
INC
CH
AD..JUST ROWS ON 0 I SPLA Y COUNT
,CLI: NUMBER COLUMNS/LINE
,,; ---
(CH) =: NUMBER OF ROwS ON 0 I SPLAY
AT THIS POINT wE KNOW THE COLUMNS/lINE COUNT IS IN tCL) 1
AND THE NUMBER OF ROWS ON THE DISPLAY [S IN (CH).
I
THE PAGE IF APPLICABLE IS IN (BH). THE STACK HAS
---- - -- -- --------- I
IDS). (AX), (BX), (CX), (OX) PUSHED.
~~~
-~; ~~; - - - - - - - - - - - - - - - - ~ ~ ~;~ -;~ ~ ~~~~
- - - - - - - -
MOV INT XOR TEST ,JNZ
AH,02H 11H AH,080H AH,OAOH PR 170
SET PRINTER STATUS REQUEST COMMAND REQUEST CURRENT PRINTER STATUS CHECK FOR PRINTER BUSY INOT CONNECTED)
OR OUT OF PAPER ERROR EX I T IF PR INTER STATUS ERROR
CAll
CRLF
CARRIAGE RETURN LINE FEED TO PRINTER
PUSH
CX
SAVE SCREEN BOUNDS
MOV
AH,03H
NOW READ THE CURRENT CURSOR POSITION
INT
10H
AND RESTORE AT END OF ROUT I NE
POP
CX
RECALL SCREEN BO~DS
PUSH
OX
PRESERVE THE ORIGINAL POSITION
XOR
; --
-
-
-
-
-
O- -X-,OX------------_
..
_------I --IN--I-T
I-A-L--C-U-R-S-O-R---(-0,-0-1--A-N-D--F--IR-S--T
PRINTER
TH I S LOOP I S TO READ EACH CURSOR POS I T ION FROM THE
SCREEN AND PRINT IT. IBH),. VISUAL PAGE (CHI: ROWS
PR110; PR120:
MOV INT MOV INT OR JNZ MOV
PUSH XOR XOR INT POP TEST JNZ INC CMP JNZ XOR MOV PUSH CALL POP INC eMP JNZ
POP MOV INT eLi MOV JMP
AH,OZH lOH AH,OSH lOH AL.Al PRI20 AL,
OX DX,OX AH,AH I7H OX AH,29H PRI60 OL CL,Dl PRIIO DL,Dl AH,Dl OX CRlF DX DH CH,OH PR 110
AH,02H lOH
.STATUS_BYTE,O SHORT PR 180
INDICATE CURSOR SET REQUEST NEw CURSOR POS I T I ON EST ABll SHED INDICATE READ CHARACTER FROM DISPLAY CHARACTER NOW I N I AU SEE I F VALI 0 CHAR ,JUMP IF VALID CHAR ELSE MAKE I T A BLANK
SAVE CURSOR POSITION INDICATE FIRST PRINTER lOX: 0) INDICATE PRINT CHARACTER IN (ALI PR I NT THE CHARACTER RECALL CURSOR POS I T I ON TEST FOR PRINTER ERROR EX I T I F ERROR DETECTED ADVANCE TO NEXT COLUMN SEE IF AT END OF LINE I F NOT LOOP FOR NEXT COLUMN BACK TO COLUMN 0 ,AH) :0 SAVE NEW CURSOR POSiTiON liNE FEED CARR I AGE RETURN RECALL CURSOR POS] T] ON ADVANCE TO NEXT LI NE FINI SHED? I F NOT LOOP FOR NEXT LINE
GET CURSOR POS I T I ON INDICATE REQUEST CURSOR SET CURSOR POS I T I ON RESTORED BLOCK INTERRUPTS TILL STACK CLEARED MOVE OK RESULTS FLAG TO STATUS_BYTE EXIT PRINTER ROUTINE
5-108 POST (01/10/86)
IBM Peraonel Computer MACRO A ·· a",blar Version 2.00 POST ----- 01/10/86 SYSTEN POST AND BIOS PROCEDURES
1-26 01-10-86
2757
2758 IFCC 2759 IFCC 5A
2760 IFCD B'" 02
2761 I FCF CO 10
2762 IFDI
2763 IFDI FA
2164 IFDZ C6 06 0100 R FF
2765 lFOt
2166 IF07 5A
2161 I FD8 59
2168 I F09 5B
2769 I FDA 58
2770 IFOB 2771 IFDB IF
2712 (FOC CF
2713 IFOD
2714
2715
2176
2717 IFDD
2718
2719 I FDD 33 02
2180 I FDF B8 0000
2761 IFE2 CD 17
2182 I FE'" B8 OOOA 2783 IFE1 CO 17
278'" IFE9 C3
2185 I FEA
2186
2161
2188
2789
2190
2191 IFFO
2192
2793
219'" I FFO
2795 IFFO EA
2796 IFFI E05B
2797 IFF3 FOOO
2198
2799 IFF5 30 31 2F 31 30 2F
2800 2801
38 36
2802 2803 1FFE
280'" I FFE 2805 I FFE FB
2806
2807 IFFF
2808
PAGE
PRlbOI
POP NOV INT PR 170:
eLI NOV PR180:
POP POP POP POP PR [90 I
POP IRET
- PR I NT_SCREEN I
AH,02H IOH
.STATUS_BYTE.OFFH
OX ex BX AX
OS
ENOP
ERROR EX IT GET CURSOR POS I TlON INDICATE REQUEST CURSOR SET CURSOR POS [T [ON RESTORED
BLOCK INTERRUPTS TILL STACK CLEARED SET ERROR FLAG
EX I T ROUTI NE RESTORE ALL THE REG I STERS USED
ROUTINE BUSY EXIT
, RETURN WITH INITIAL. INTERRUPT MASK
; ----- CARRIAGE RETURN, LINE FEED SUBROUTINE
CRL.F
PROC
NEAR
CRLF
XOR NOV INT NOV INT RET ENDP
OX,DX
AX.CR I1H AX,LF I7H
1----------------------- --------
,; ----- --P-O-W--E-R -O--N--R-E-S-E-T--VE-C-T-O--R --- I
,
ORG
OFFFOH
ORG
01FFOH
SEND CR,LF TO FIRST PRINTER ASSUME FIRST PR INTER (OX. 0 I GET THE PR I NT CHARACTER Cor.e.AND AND
THE CARR I AGE RETURN CHARACTER
NOW GET THE LINE FEED AND
SEND IT TO THE BIOS PRINTER ROUTINE
1----- POWER ON RESET
P0 R --
L.ABEL DB
FAR OEAH
OW
OE05BH
OW
OFOOOH
LOW WORO OF RE SET SEGMENT
DB
'01/10/86'
I RELEASE MARKER
MODEL: CODE
ORG ORG
DB
ENDS END
OFFFEH
o IFFEH
MODEL_BYTE
POST (01/10/86) 5-109
Notes:
5-110 POST (01/10/86)
System BIOS Listing - 11/8/82
~ Quick Reference - 64/256K Board
Equates ....................................... 5-113
8088 Interupt Locations .......................... 5-113
Stack ......................................... 5-113
Data Areas .................................... 5-113
Power-On-SeK-Te~ ............................. 5-115
Boot Strap Loader
5-127
I/O Support RS-232C ................................... 5-128 Keyboard ................................... 5-131 Diskette .................................... 5-138 Printer ..................................... 5-146 Display .................................... 5-148
System Configuration Analysis Memory Size Determine ....................... 5-167 Equipment Determination ...................... 5-167
Graphics Character Generator ...................... 5-171
Time of Day
5-172
Print Screen
5-175
BIOS 5-111
Notes:
5-112 BIOS
LOC OS..JECT
0060 0061 0062 0063 0020 002 , 0020 0040 0043 0040 000 , 0008 0000 0540 0410 0060 OOO? 0060 0061
0000 0008 0008 00 t 4 0014 0020 0020 0020 0040 0040 0074 0074 0060 0060 0078 0018 001C 007C 0400 0400 0400 0500 0500 lCOO lCOO
0000 (128 ???? I
0100
0000 (4 7777 I
0008 (4 P?? I
0010 pn 0012 ?? 0013 ???? 0015 ?? 0016 ??
0011 ??
0080 0040 0020 0010 0008 0004 0002 0001
LINE SOURCE (8105 FOR THE ISM PERSONAL COMPUTER XTI 11/08/82
I STITLE(SIOS FOR THE IBM PERSONAL COMPUTER XTl
2
3
4
THE 810S ROUTINES ARE MEANT TO BE ACCESSEO THROUGH
·5
7
SOFTWARE INTERRUPTS ONLY, ANY ADDRESSES PRESENT IN THE LISTINGS ARE INCLUDED ONLY FOR COMPLETENESS, NOT FOR REFERENCE. APPLICATIONS WHICH REFERENCE
6
ABSOLUTE ADDRESSES W1TH I N THE CODE SEGMENT
9
V lOLA TE THE STRUCTuRE ANa DES I GN OF 8105.
iO
))
12 ; -- - ------------ - - - - - - - - - -- - - - ----.-----
13 I
EQUATES
:; ~~~~-~----------~;~- ---~~~-------------- 8255 PORT A AOOR
16 PORT-S
EQU
61 H
8255 PORT 8 ADDR
17 PORT-C
EQU
62H
8255 PORT C AOOR
18 CMD PORT
EQU
63H
19 INTAOO
EQU
20H
8259 PORl
20 INTAOI
EQU
21H
8259 PORT
21 E01
EeU
20H
22 T 1MER
Eeu
40H
23 TIM CTL
EeU
43H
8253 T I MER CONTROL PORT ADDR
24 T I MERO
EeU
40H
8253 TlMERICNTER 0 PORT ADDR
25 TMINT
EeU
01
TIMER 0 INTR RECVO MASK
26 OMMa
Eeu
08
DMA STATUS REG PORT ADDR
21 OMA
EeU
00
DMA CH. 0 AODR. REG PORT ADDR
28 MAX PER I 00
Eeu
540H
29 M 1N-PER 100
EQU
410H
30 KSD-IN
EQU
60H
KEYBOARD OATA IN AOOR PORT
31 KsoTNT
EQU
02
KEYBOARD I NTR MASK
32 KS DATA
EeU
bOH
KEYBOARD SCAN CODE PORT
33 KS=CTL
EQU
61 H
CONTROL BITS FOR KEYSOARD SENSE DATA
34
35 ; ------------
-------- ------------
36 ;
8068 INTERRUPT LOCATIONS
37 1------------ - --------- - - - - ------------
36
39 ABSO
SEGMENT AT 0
40 STG_LOCO
LABEL BYTE
41
ORG
2"4
42 N"' PTR
43
ORG
LABEL 5"4
WORD
44 INTS_PTR
LABEL WORD
45
ORG
6"4
46 INT ADDR
LABEL WORD
47 1NT=:PTR
LABEL OWORD
46
ORG
IOH-4
- 49 VIDEO INT
50
ORG
LABEL IDH·4
WORD
51 PARM_PTR
LA8EL DWORO
I POINTER TO VIDEO PARMS
52
ORG
18H·4
53 SASIC_PTR
LABEL WORD
ENTRY POINT FOR CASSETTE SASIC
54
ORG
01EH·4
INTERRUPT IEH
55 DISK_POINTER
56
ORG
LABEL DWORD
o tFH·4
LOCA T I ON OF PO I "ITER
57 EXT _PTR LABEL DWORD
POINTER TO EXTENSION
56
ORG
400H
.059 DATA AREA DATA=:WORD
LABEL LABEL
8YTE WORD
ABSOLUTE LOCATION OF DATA SEGMENT
.261
ORG
MFG TEST RTN
63
-
ORG
0500H LABEL lCOOH
FAR
64 BOOT _LOCN
LABEL FAR
.,65 11.850
6 ·
ENDS
66
69
70
71 STACK 72
SEGMENT AT 30H
OW
128 DUP,?)
73 TOS
LABEL WORD
14 STACK ENDS
75
16
----------------- ---------------
17
ROM BIOS DATA AREAS
18 ; - - - - - - - - - - - ---------- - - - - -- - -- - - - -- - - - -
79
80 DATA
SEGMENT AT 40H
81 RS232_8ASE
OW
4DUP(?)
ADDRESSES OF RS232 ADAPTERS
82 PRINTER_BASE
ow
4 DUPI?)
AOORESSES OF PR INTERS
83 84 85 86 67
eo
89
90 91 92 93 94 95 96 97
96 99
100 101 102
103 104 , 05
EQUIP FLAG
OW
MFG TST
DB
MEMORY SIZE
OW
MFG_ERR_FLAG
OB
OB
;-
I
KEY80ARD DATA AREAS
I "1ST ALLEO HARDWARE
INITIALIZATION FLAG
MEMORY SIZE IN '" SYTES
; SCRATCHPAD FOR MANUFACTURING
; ERROR CODES
OB
---- SHIFT FLAG EQUATES WITHIN K8 FLAG
1"15 STATE CAPS STATE NUM STATE SCROLL STATE ALT SHTFT CTL-SHIFT
LEFT SHIFT RIGHT_SHIFT
Eau Eau Eau Eau Eau Eau Eau Eau
60H 40H 20H 10H 06H 04H 02H OIH
INSERT STATE IS ACTIVE CAPS LOCK STATE HAS SEEN TOGCiLED NUM LOCK STATE HAS BEEN TOGGLED SCROLL LOCK STATE HAS BEEN TOGGLED AL TERN ATE SH I FT KEY DEPRESSED CONTROL SHIFT KEY DEPRESSED LEFT SH I FT KEY DEPRESSED RIGHT SHIFT KEY DEPRESSED
PC-XT System BIOS (11/08/82) 5-113
LOC OBJECT
0016 17
0060 0040 0020 00 I 0 0008
0019 17 001 A ?? 7 OOIC 17 7 OOIE (I
17 1 I 003E
0045 0046 0036 0010 003A 002A 0036 0052 0053
003E 71
0080
003F ??
0040 ??
0025
0041 17
0080
0040
0020
0010 0009 0008 0004 0003 0002 0001
0042 (7
"I
0049 004A 004C 004E 0050
0060 0062 0063 0065 0066
7777 (8 7777 I
1717
77 ??
0067 1777
0069 1117 006B ?7
006C 7777
006E ????
0070 1?
0071 17 0072 ??17
0074 7777
0076 77??
0078 14
"I
OOTC 14 l' I
LINE SOURCE 1BIOS FOR THE IBM PERSONAL COMPUTER XT) 11/06162
106 IO? 108
10' 110 III 112 113 114 115 116 III
KB_FLAG_ I
INS SHIFT CAPS SHIFT NU1.4 SHIFT SCROLL SH I FT HOLD_STATE
ALl INPUT
BUFFER HEAD BUFFER-TAIL KB_BUFFER
DB
Eau EaU EDU EDU EDU
DB OW OW OW
80H 40H 20H 10H 08H
,
16 DUP(? I
SECOND BYTE OF KEYBOARD STATUS
INSERT KEY I S DEPRESSED
CAPS LOCK KEY IS DEPRESSED
NUM LOCK KEY I S DEPRESSED
SCROLL LOCK KEY I S DEPRESSED
SUSPEND KEY HAS BEEN TOGGLED
STORAGE FOR ALTERNATE KEYPAD ENTRY PO I NTER TO HEAD OF KEYBOARD BUFFER PO I NTER TO TAl L OF KEYBOARD BUFFER ROO1.4 FOR 15 ENTR IES
118 II. 120 121 122 123 124
125 125 121 128
12' 130 131 132 133
134 135 135 131 138 139 140 141 >42
143 144
145
146 147 148 149 150 151 152 153 154
15' 155 151 158 159 150 151
- HEAD = TAIL INDICATES THAT THE BUFFER IS EMPTY
NUM KEY SCROLL KEY AL T KEY CTL-KEY
CAPS KEY LEFT-KEY
RIGHT KEY INS KEY DEL::::KEY
EDU
69
EDU
10
EDU
56
EDU
2'
EDU
58
EDU
42
EDU
54
Eau
82
Eau
83
SCAN CODE FOR NUMBER LOCK SCROLL LOCK KEY ALTERNATE SHIFT KEY SCAN CODE SCAN CODE FOR CONTROL KEY SCAN CODE FOR SH I FT LOCK SCAN CODE FOR LEFT SH I FT SCAN CODE FOR RIGHT SHIFT SCAN CODE FOR I NSERT KEY SCAN CODE FOR DELETE KEY
;
DISKETTE DATA AREAS
;~~;~;~~~~;----- - -- - - --------
- - - - - ------
DR I VE RECALl BRAT I ON
BIT 3-0 = DRIVE 3-0
BEFORE NEXT SEEK IF
STATUS NEEDS RECAL
BIT IS = 0
I NT FLAG MOTOR_STATUS
Eau DB
080H
INTERRUPT OCCURRENCE FLAG MOTOR STATUS BIT 3-0 = DRIVE 3-0 IS CURRENTLY
RUNNING BIT 1 = CURRENT OPERATION IS A WRITE.
REQU I RES DELAY
MOTOR COUNT 1.40TOR-WAIT
DB EDU
DISKETTE STATUS T I1.4E OUT
BAD SEEK. BAD-NEC BAD-CRC DMA -BOUNDARY
BAD-OMA RECORD NOT FND WR I TE PROTEcT BAD AODR MARK BAD::::CMD
DB EQU
EQU EQU Eau Eau
Eau EQU Eau EQU EQU
NEC_STATUS
DB
31
,
SOH 40H 20H IOH O.H O8H 04H 03H 02H OIH
7 DUP! 71
TIME OUT COUNTER FOR DR I VE TURN OFF 2 SECS OF COUNTS FOR 1.40TOR TURN OFF
RETURN CODE STATUS BYTE ATT ACHMENT FA I LED TO RESPOND SEEK OPERAT I ON FA I LED NEC CONTROLLER HAS FA I LED BAD CRC ON 0 I SKETTE READ ATTEMPT TO DNA ACROSS 64K BOUNDARY DMA OVERRUN ON OPERATION REQUESTED SECTOR NOT FOUND WR I TE ATTEMPTED ON WR I TE PROT 0 I SK ADDRESS 1.4ARK NOT FOUND BAD COMMAND PASSED TO D! SKETTE 110
STATUS BYTES FROM NEG
153
164
VIDEO DISPLAY DATA AREA
::~ CRT MODE
DB
167 CRT-COLS
OW
168 CRT-LEN
OW
169 CRT-START 170 CURSOR_POSN
DOw.
1 6 QUPI? I
CURRENT CRT MODE
NUMBER OF COLUMNS ON SCREEN
LENGTH OF REGEN I N BYTES
STARTING ADDRESS IN REGEN BUFFER
CURSOR FOR EACH OF UP TO 8 PAGES
111 112
173 174 175 175 171 118
17' 180 181
182 183
'"185
186 181
188 189
190
"'"2 ,1.943
CURSOR MODE
OW
ACTIVE-PAGE
DB
ADOR 6845
OW
CRT MODE SET
DB
CRT::::PALETTE
DB
CURRENT CURSOR MODE SETT I NG
CURRENT PAGE BEING DISPLAYED
BASE ADDRESS FOR ACTIVE DISPLAY CARD
CURRENT SETT I NG OF THE 3X8 REG I STER
CURRENT PALETTE SETT ING COLOR CARD
POST DATA AREA
; PNTR TO OPTIONAL 110 ROM INIT ROUTINE ; PO I NTER TO 10 ROM SEG1.4ENT
; FLAG TO INDICATE AN INTERRUPT HAPPEND
; -- ------------ ---------------------- ---
;
TIMER
"-----------
TIMER LOW
TIMER-HIGH
T IMER-OFL
; COUNTS SEC
; COUNTS-WIN
; COUNTS-HOUR
; COUNTS::::DAY
DATA AREA
OW OW DB Eau Eau Eau EDU
, ,
18 1092 65543 1573040
LOW WORD OF T I MER COUNT · HIGH WORD OF T I MER COUNT ; TIMER HAS ROLLED OVER SINCE LAST READ
1600BOH
,.5195 ;
SYSTEM DATA AREA
191 198
~~~;-~~~~~------o;------------------
BIT 1=1 IF BREAK KEY HAS BEEN HIT
'" --------- RESET_FLAG
OW
200 ; ------ ------ - ------
; WORD= 1234H IF KEYBOARD RESET UNDERWAY
--------- --
201
FIXED DISK DATA AREAS
202
203
OW
-- - 204
205
; - ----
- - --- - ---OW---- - - - -- - ------
- - - ---------- -----
206 ;
PR I NTER AND RS232 T I ME-OUT VAR I ABLES
201
208
4 DUPI? f
5-114 PC-XT System BIOS (11/08/82)
LOC OBJECT
0080 0082
0000
0000 0000 0000
(( 6384
" I
0000 (51344
"I
EOOO
3 (353031353132 20434F50522E20 49424020313938 32
E016D1EO EO 18 1EE 1
EO I A 204B42204F4B E020 00
E021 E021 E613 I A E024 6AFB E026 E60E I A E029 6AE8 E02B 6ACF E02D FC E02E FA E02F BF0005 E032 BOFD E034 E621 E036 BOOA E036 E620 E03A BA6100 E030 8BCC4C E040 8402 E042 E042 8AC3 E044 EE E045 6AC1 E041 EE E048 4A E049 E049 E420 E04B 22C4 E04D 14FA E04F EC E050 AA E051 42 E052 E2EE
E054 E"00050000
LINE
21. 211 212 213 214 215 21. 211 216 219 22. 221 222 223 22' 225 22' 227 226
SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER Xl)
; ----
;
ADD I T I ONAL I<EYBOARD DATA AREA
~~;;~~ - ~~~~~----~; -
BUFFER-END
OW
DATA - ENDS
;----------
.I _------D--T-R-A -D-A-T-A---AR--EA--
XXDATA SEGMENT AT 50H
STATUS BYTE
DB
XXDAT.l.- ENDS
11/08/82
VIDEO DISPLAY BUFFER
: ---- --------- ----------- -------- -
VIDEO RAM
SEGMENT AT OB600H
REGEN- LABEL BYTE
REGENW LABEL WORD
DB
16364 DUP ( 1)
229 230
~~~:~~~~~-
ENDS
231
ROM RES I DENT CODE
232 233
~~~~ - - - - ~~~~~~~-~T - ~;~~~~--- -- -
234
DB
51344 OUP( 7)
FILL LOWEST 561<
235 23.
08
'1501512 COPR, IBM 1982'
; COPYR I GHT NOT I CE
237
236 239
; ----- - - - - - - - - - -- - - - - - --- - - - - - - --- ------------
24. ;
INITIAL RELIABILITY TESTS -- PHASE 1
241 ;---------
242
243
ASSUME
CS :CODE, SS: CODE .ES I ABSO .OS IDATA
. 244
245
----- ----- ----- ------ ----- -------------
24. 247
;; --------D-A-TA--DEFINITIONS
248
249 Cl
OW
CII
2.,250 C2
OW
C24
RETURN ADDRESS RETURN ADDRESS FOR DUMMY ST ACI<
2.2 F38
08
, KB OK' ,13
KB FOR MEMORY SIZE
253 254 255 25. 257
256 259 2.0 2. I
262 263
264 265 266
267 266 269 270 27 I
272 273 274 275 276 277
278 279 26.
281 282
283 284 28. 28. 287 288 289 29. 291 292 293 294 295 296 297 296 299 300
LOAD A BLOCK OF TEST CODE THROUGH THE KEYBOARD PORT
FOR MANUF ACTU I NG TEST.
THIS ROUTINE WILL LOAD A TEST (MA)( LENGTH=FAFFHI THROUGH
THE KEYBOARD PORT. CooE WILL BE LOADED AT LOCA T 1ON
0000:0500. AFTER LOADING, CONTROL WILL BE TRANSFERED
TO LOCATION 000010500. STACK WILL BE LOCATED JUST BELOW
THE TEST CODE. THIS ROUTINE ASSUMES THAT THE FRIST 2
BYTES TRANSFERED CONTAIN THE COUNT OF BYTES TO BE LOADED
- ----- ; - -- - - - --(B-YT-E---l=-C-O-U-N--T--LO--W,
BYTE 2=COUNT
----- --
HI.I
;----- FIRST, GET THE COUNT
MFG_BOOT:
CALL
"DV CALL
"DV
"DV CLD
CLI
"OV
"OV OUT
"OV OUT
"DV
"OV
TST:
"OV
"OV OUT
"OV OU7
DEC TSTI:
IN
AND
JZ
IN
STOSB
INC LOOP
SP TEST BH--;-BL SP TEST CH--;-BL CL,BH
Dt ,0500H AL,OFDH INTAO I.AL AL,OAH INTAOO ,AL DX,61H BX ,4CCCH AH,02H
AL,BL
DX,AL AL,BH
DX,AL
OX
AL,INTAOO AL,AH TSTI AL,DX
OX T5T
GET COUNT LOW SAVE IT GET COUNT HI
ex NOW HAS COUNT SET DIR. FLAG TO INCRIMENT
SET TARGET OFFSET (DS=OOOOI UNMASK K /B INTERRUPT
SEND READ tNT. REQUEST REG. CMD
SET UP PORT B ADDRESS CONTROL BITS FOR PORT B K/B REQUEST PENDING MASK
I TOGGLE K I B CLOCK
POINT OX AT ADDR. 60 iKB DATAl
GET IRR REG
K8 REQUEST PENDING?
LOOP TILL OAT A PRESENT
GET DATA
STORE IT
POINT DX BACK AT PORT B i61) LOOP TILL ALL BYTES READ
J"P
MFG_TEST_RTN
FAR JUMP TO CODE THAT WAS JUST LOADED
PC-XT System BIOS (11/08/82) 5-115
LOC OBJECT
E058 E058 E05B F'A E05C 8405 E05E 9E E05F 134C E061 154A E063 1848 E065 1946 E061 9F E068 BI05 E06A 02EC E06C 133F E06E 8040 EO 70 OOEO E072 1139 E014 32E4 E016 9E E017 7634
E079 7832 E018 7A30 EOID 9F' E01E 8105 E080 D2EC E082 1229 E084 00E4 E086 1025
E08S S8FFFF" E06B F9 E08e 8E08 E08E 8CDS E090 8EC3 E092 8CC 1 E094 8EOI E096 8C02 E09S 88E2 E09A 88EC E09C 88F5 E09E 88FE EOAO 1301 EOA2 33C7 EOA4 1507 EOA6 F8 EOA1 EBE3 EOA9 EOA9 08C1 EOAB 7401 EO AD F4
EOAE
EOAE E6AO E080 E683 E082 BA0803 E085 EE E086 FECO E088 8288 E08A EE E088 8089 E080 E663 E08F 80A5
Eoel E661
EOC3 8001 Eoe5 E660 EOC1 8eC8 EOC9 8EOO EOC8 8E08
EOCO FC
EOCE 8800EO EOO 1 8C 16EO E004 E91818 E001 1504
EOD9 8002 E008 E660 EOOD 8004 EOO-F E608
EOE I 8054 EOE3 E643
LINE SOURCE 18105 FOR THE IBM PERSONAL COMPUTER XT) II J08J82
302 303 304 305 30. 301 306 309 310
3>1 312 313 314
315
31. 317 316 319
320
321 322 323 32. 325 32. 327 328 329 330 331
332 333 33. 335 33.
331 338 339
340
3'1 3.2
3'3
;
8088 PROCESSOR TEST
; DESCRIPTION
VERIFY 8088 FLAGS, REGISTERS
AND CONO I T I ONAL ,JUMPS
RESET START:
ASSUME ORG LABEL
CL 1
"0'
SAHF eNC
"NZ "NP "NS LAHF NOV SHR JNC NO' SHL
"NO XOR SAHF
"BE
JS eP LAHF NOV SHR
"C SHL
"0
CS: CODE. OS :NOTH I NG, ES INOTH I NG, SS: NOTH I NG
OE05BH
FAR
01 SA8LE INTERRUPTS
AH,005H
SET SF, CF, ZF, AND AF FLAGS ON
ERROl
ERR a I
ERROl ERROl
CL,5 AH,CL ERROl AL ,40H AL, I ERRO 1 AH,AH
ERRO I
ERROl ERROl
CL,5 AH,CL ERROl AH,I ERRO I
GO TO ERR ROUT I NE IF CF NOT SET GO TO ERR ROUT I NE IF ZF NOT SET GO TO ERR ROUT I NE IF PF NOT SET GO TO ERR ROUT I NE I F SF NOT SET LOAD FLAG IMAGE TO AH
LOAD CNT REG WITH SHIFT CNT SHIFT AF INTO CARRY 81T POS GO TO ERR ROUT I NE IF' AF NOT SET SET THE OF FLAG ON
SETUP FOR TES T I NG GO TO ERR ROUT I NE I F OF NOT SET
SET AH = 0
CLEAR SF. CF', IF, AND PF GO TO ERR ROUT INE IF CF ON
GO TO ERR ROUT I NE IF ZF ON GO TO ERR ROUTINE IF SF ON GO TO ERR ROUT INE IF PF ON LOAD FLAG I MAGE TO AH
LOAD CNT REG WITH SHIFT CNT SHIFT 'AF' INTO CARRY BIT POS ; GO TO ERR ROUTINE IF ON ; CHECK THAT 'OF' I S CLEAR ; GO TO ERR ROUTINE IF ON
;----- READ/WRITE THE 8088 GENERAL AND SEGMENTA.TION REGISTERS WITH ALL ONE'S AND ZEROES'S.
C8:
NOV STC NOV
AX , OFFFFH DS,AX
SETUP ONE'S PATTERN I N AX WR I TE PATTERN TO ALL REGS
3" 345 346 341 348
3.9 350
351 352 353 354 355 35.
351 356 359 3.0 3.1 3.2 363 364 365
336.6,
3.6 3.9 310 311 312 313 314 315 31.
"6311
319 380 381 382 383 364 365
36. 381
366 389
390 391
39' 393
394 395 39.
391 398 399 400
401 402 .03
'0'
'05 40. 401 408 409
.10
.41121
413
'4115'
416 417
C9: ERRO!:
NOV
NO' NO' NO' NO' NO' NOV NOV NOV
"NC XOR "NZ CLC JNP
OR "Z HLT
BX,DS ES,BX CX,ES SS,CX DX,SS SP,DX BP,SP SI,BP D!, SI C9 AX,DI ERROl
C8
AX,DI C10
:
ROS CHECKSUM TEST I
; DESCRIPTION
A CHECKSUM I S DONE FOR THE 8K
ROS MODULE CONTAINING POD AND
810S.
TST1A PATTERN MAKE IT THRU ALL REGS NO - GO TO ERR ROUT I NE
TSTIA ZERO PATTERN MAKE IT THRU? YES - GO TO NEXT TEST HALT SYSTEM
OUT OUT
NO' OU1
INC NOV OUT NOV OUT
NO'
OAOH,AL 83H, AL DX.3D8H DX,AL AL DL,OBSH DX,AL AL,89H eMD_PORT. AL AL,IOIOOIOIB
PORT_B,AL
NOV OUT NO' "OV NO'
AL,O IH PORT _A,AL AX ,es
SS ,AX
OS,AX
CLO ASSUME NOV
"OV "NP "NE
SS:CODE BX,OEOOOH SP,OFFSET Cl ROS CHECKSUM ERROl
ZERO IN AL ALREADY 01 SA8LE NM I INTERRUPTS I NIT I ALZE DMA PAGE REG
01 SA8LE COLOR V IDEO
DISABLE BIW VIDEO,EN HIGH RES SET 8255 FOR e,A=OUT, C=IN
ENABLE PAR !TY CHECKERS AND PULL K8 CLOCK HI, TR I-STATE KEY80ARD I NPUTS ,ENABLE HIGH 8ANK OF SW I TCHES->PORT C [0-3) <><><><><><><><> <> <> <><>
<><><>CHECKPOINT 1<><><>
SETUP SS SEG REG
SET UP OAT A SEG TO PO I NT TO
ROM ADDRESS SET DIRECTION FLAG TO INC.
SETUP STARTING ROS AOOR SETUP RETURN ADDRESS
HALT SYSTEM IF ERROR
8231 OMA INITIALIZATION CHA.NNEL REGISTER TEST OESCR I PT [ON
o I SABLE THE 8237 DMA CONTROLLER. VER I FY THAT
TIMER' FUNCTIONS OK. WRITE/READ THE CURRENT ADDRESS AND WORD COUNT REG I STERS FOR ALL CHANNELS. INITIALIZE AND START OMA FOR MEMORY REFRESH.
;----- 01 SABLE DMA CONTROLLER
MOV OUT MOV OUT
AL,02H PORT A, AL AL,04 DMA08,AL
<><><><> <> <><><><><> <><> <><><>CHECKPO I NT 2<> <><> 01 SA8LE OMA CONTROLLER
loIERIFY THAT TIMER 1 FUNCTIONS OK
NO' OUT
AL ,54H TIMER'3,AL
j SEL TIMER I,LS8,MOOE 2
5-116 PC-XT System BIOS (11/08/82)
LOC OBJECT
EOE5
8AC t EOE7
E641 EOE9
EOE9
B040 EOEB
E643 EOEO
80FBFF EOFO
7407 EOF2
E44 t EOF4
OA08 EOF6
E2F t EOF8
F4 EOF9
EOF9
8AC3 EOFB
2BC9 EOFO
Eb41 EOFF
EOFF
8040 EI 0 I
Eb43 EI03
90 E I 04
90 EI05
E441 EI07
2208 EI09
7403 EIOB
E2F2 EIOO
F4
EIOE
8003 EIIO
Eb60
EI 12
E600
EI14 BOFF Ell b 8AD8 EI18 8 ... F8 El I A 890800 EI 10 BAOOOO E 120 EE EI21 50 E 122 EE EI23 BOOI E 125 EC E 126 8AEO E 128 EC EI293808 EI2B 1401 E 120 F4 EI2E EI2E 42 EI2F E2EF EI31 FECO EI33 74EI
E135 8EOB EI37 8EC3
EI3980FF E 138 EbO I E 130 50 EI3E E60! EI40 B058 EI42 E60B EI44 8000 EI46 8"'E8 EI48 E608 E14'" 50 EI4B E60A EI408012 EI4F E641 E 151 B041 EI53 E60B E 155 50 E156 E408 EI582410 E15", 740 I E 15C F4 EI508042 E 15F E608 EI61 8043 EI63 E60B
EI65 B"'1302 E168 BOOI ElbA EE
Elb88BIE7204 ElbF B90020 EI7281FB3412 E176 7416 El788CIBEO EI18 E9Fl04 EI7E 7412 EI80 8AOB EI828004 EI84 Eb60 EI8b 2BC9 EI88 E2FE EI8A 8608 EI8C E8F6
LINE SOURCE IBIOS FOR THE IBM PERSONAL COMPUTER XT I 1 I 108/82
418 419 420 421 422 423
424 425 42. 427
428 429 430 431 432 433 434 435
436 431 438 430 440 441
442
443
444 445
446 447 448 449 450 451 452
453 454 455
45. 457 458 45. 4.0 4., 4.2 4.3 4.4 4.5
4 ·· 4.7 468 4.9 470 471 472
473
474
C12;
CI 3 : C14:
C 15: ,----C16; CI7 :
C 18: ;--
MOV
OUT CMP JE IN OR LOOP
HLT
MOV SUB OUT
MOV OUT Nap Nap
IN ANa JZ LOOP HL T
AL,CL TIMER+I ....L
AL .40H TIMER+3.AL
8L.OFFH CI3 AL.TIMER+I BL.AL CI2
AL.BL CX.CX
TIMER+l.AL
AL .40H TIMER+3.AL
AL.TIMER+I BL.AL
CIS CI4
SET INITIAL TIMER eNT TO 0
TIMERI BITS ON
LATCH TIMER-I COUNT
YES - SEE IF ALL BITS GO OFF
TIMERI BITS OFF
READ TTMER T COUNT
ALL BITS ON IN TIMER
TIMERI BITS ON
TIMER T FAILURE, HALT SYS
TIMER! BITS OFF
SET TIMER '-CNT
TIMER LOOP
LATCH-TIMER 1 COUNT
DELAY FOR TIMER
READ T J MER 1 COUNT
WRAP DMA REG
T I MER LOOP
HAL T SYSTEt.4
INITIALIZE TIt.4ER I TO REFRESH MEMORY
MOV OUT
OUT
AL .03H PDRT_A.AL
DMA+ODH.AL
<> <> <><><><><><> <><><><>
<><><>CHECKPO I NT 3 <><><>
, WRAP DIIIA REG
: SEND-MASTER CLEAR TO OMA
WRAP DMA CHANNELS ADDRESS AND COUNT REGISTERS
MOV MOV MOV MOV MOV OUT PUSH OUT MOV IN MOV IN CMP oE HL T
INC LOOP INC JZ
AL ,OFFH BL,AL BH,AL CX.8 DX.Dt.4A DX ....L AX OX ,AL AL. 0 1H AL.DX AH.AL AL.DX BX. AX CI8
OX CI7 AL CI.
WR I TE PATTERN FF TO ALL REGS
; SAVE PATTERN FOR COMPARE
SETUP LOOP CNT
SETUP 110 PORT AooR OF REG
WRITE PATTERN TO REG. LSB
SATISIFY 8237 110 TIMINGS MSB OF 16 BIT REG AL TO ANOTHER PAT BEFORE Ro READ 16-BIT DMA CH REG, LSB SAVE LSB OF I b-B I T REG READ MSB OF OMA CH REG PATTERN REAO AS WRITTEN?
YES - CHECK NEXT REG
NO - HALT THE SYSTEM
NXT DMA CH
SET-I/O-PORT TO NEXT CH REG WR I TE PA TTERN TO NEXT REG
SET PATTERN TO 0
WR I TE TO CHANNEL REGS
INITIALIZE AND START OMA FOR MEMORY REFRESH.
476 477
MOV MOV
DS,BX ES.BX
SET UP ABSO I NTO OS AND ES
478
ASSUME OS: A8S0. ES: ABSO
479 480
MOV OUT
AL.OFFH OMA+I.AL
SET CNT OF 64K FOR REFRESH
481
PUSH
AX
482
OUT
DMA+I.AL
483 484 485 486 487
MOV OUT MOV MOV
OUT
AL.058H OMA+OBH.AL AL.O CH.AL DMA+8.AL
SET DMA MODE,CH O.Ro ·· AUOTINT
WR I TE DMA MODE REG
ENABLE DMA CONTROLLER
SET COUNT HI GH:OO SETUP Dt.4A COMMAND REG
488
PUSH
AX
489
OUT
010114.+ I O.AL
ENABLE DMA CH 0
4'0
MOV
AL.18
START TIMER I
4" 492
OUT MOV
TIMER+I,AL
AL.41H
SET MODE FOR CHANNEL I
4'3
OUT
DMA+OBH.AL
4'4
PUSH
AX
4'5 4··
IN ANa
AL.OMA+08 AL. 000 I OOOOB
GET DMA STATUS
IS TIMER REQUEST THERE?
4'7
OZ
4.,4'8 CI8CI
HL T MOV
C 18C AL .42H
(IT SHOULD'T 8E)
HALT SYS. (HOT TIMER I OUTPUT)
SET MODE FOR CHANNEL 2
500
OUT
DMA+OBH.AL
501
MOV
502 503
;--------O-UT
AL .43H OMA+OBH.AL
SET MODE FOR CHANNEL 3
504 ;
BASE I bK READ I WR I TE STORAGE TEST
505 ; DESCRIPTION
50. 507
WRITE/READ/VERIFY DATA PATTERNS
AA,55.FF,OI. AND 00 TO 1ST 32K OF
--- - - 508
509 ; - - - - -
- STORAGE.
---- --
-V-E-R-
-I
-F
Y -
-
-ST-O-R-A-G- E-
-
ADORES
------
SA8
--
I -
L
I
-
TY
--
.
-
-
510
51 I :----- DETERMINE MEMORY SIZE AND FILL MEMORY WITH DATA
512
513 514
MOV MOV
OX.0213H AL.OtH
; ENABLE I/O EXPANSION BOX
515
OUT
OX.AL
51.
517 518
MOV MOV
BX.OATA WORD[OFFSET RESET FLAG] ; SAVE 'RESET FLAG' IN BX
cX.2000R
;-SET FOR 16K WORDS
519
CMP
BX.1234H
WARM START?
520
oE
CLR STG
521
MOV
SP.OFFSET C2
522
JMP
STGTST CNT
523 524
525
C24:
JE MOV MOV
HOW BIG 8L.AL AL.04H
STORAGE OK. DETERMINE SIZE
SAVE FAILING BIT PATTERN
<> <> <> <> <> <> <> <> <> <> <> <>
52. C24A: OUT
PORT A.AL
<><><>CHECKPOINT 4<><><>
527 528 52. 530
C24BI
SUB LOOP XCHG JMP
CX,CX C248 BL.AL C24A
BASE RAM FAILURE HANG
FL I PP I NG BETWEEN 04 AND
FAILING BIT PATTERN
PC-XT System BIOS (11/08/82) 5-117
LOC OB..JECT
EI6E EI6E 2BCO EI90 F3 EI91 AB EI92 EI92891E7204 E196 BAOO04 EI99881000 EI9C EI9C 6EC2 E 19E 2BFF EIAO 8655AA E I 1.3 6BC6 E I 1.5 266905 EIA6800F EIAA 268B05 EIAO 33CI EIAF 751 I EIBI B90020 E1B4 F3 EIB5 AB EIB6 81C20004 ElBA 83C310 EISD 80FEAO EICO 7501. EIC2 EIC2891E1304
E I C6 883000 E I C9 8EDO EICB BCOOOI
EICE BOl3 El00 E620 EI02 B008 EI04 E621 EI06 8009 EID8 E621
EIDA BOFF EIDC E621
EIDE IE E I OF 892000 EIE2 28FF EIE4 8EC7 EIE6 8B23FF E IE9 1.8 EIEA BCCB EI EC A8 EIED E2F7
EIEF BF4000 EIF2 OE EIF3 IF EIF4 8CDS EIF6 BE03FF90 EIFA 891000 E 1FD A5 EIFE 47 EIFF 41 E200 E2FB
E202 IF E203 IE E204 E462 E206 240F E208 8AEO E20A 801.0 E20C E661 E20E 90 E20F E462 E21 I BI04 E213D2CO E21524FO E217 OAC4 E219 2AE4 E21B 1.31004 E21E 9099 E220 E663 E222 E80518 E225 80F8AA E228 7418 E22A SOF865 E220 7503 E22F E9EFFD E232 803B E234 E661 E236 90 E231 90 E238 E460 E23A 24FF E23C 7504 E23E FE061204
LINE SOURCE 18105 FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
531 532 533
CLR STG:
-
SUB
REP
AX, AX STOSW
; MAKE AX=OOOO ; STORE 8K WORDS OF 0000
534 535 536 531 536 539 540 541 542 543 544 545 546 541 546 5.9
HOW 81Gl
-
MOV
MOV
MOV
FILL LOOP:
-
MOV
5UB MOV
MOV MOV
MOV
MOV
'OR
"Nl
MOV
REP
g~~~4~~~0[OFFSET RESET_F~A~~;.B~O:N~~~T~~E..J~~~;; 6~~AG
8X,16
; BASIC COUNT OF IbK
ES,DX 01,01 AX ,OAA55H CX,AX ES:(OI],AX AL,OFH AX,ES:[DI] AX,CX HOW BIG END cX,2000R STOSW
SET SEG. REG.
TEST PATTERN SAVE PATTERN SEND PATTERN TO MEM. PUT SOMETH I NG I N AL GET PATTERN COMPARE PATTERNS GO END I F NO COMPARE SET COUNT FOR 8K WORDS FILL 8K WOROS
550 551 552 553
55. 555 556 551 556 559 560
561
562 563 564 565 566 561 56. 569 510
511 512 513 514 515 516 511 510 519
5.0
5.' 562 5.3 584
5.5 5.6 5.,
568 5.9 590 591 592 593 594 595 596 591 59. 599 600 601 602
603
60' 605 606 601 60.
6" 610 611 612 613
614 615 616 611 61. 619
620 621 622 623 624 625 626 621 62. 629 630 631 632 633
ADD AOO CMP
"NZ He... BIG END:
- -MOV
OX,4DOH eX,I6 DH.OAOH FILL_LOOP
POINT TO NEXT 16K8 BLOCK BUMP COUNT BY 16KB TOP OF RAM AREA YET? I AOOOO )
DATA_WORDIOFFSET MEMORY_SIZE],BX
; SAVE MEMORY 5 I ZE
5E:TUP STACK SEG AND SP
MOV
AX,STACK
MOV
SS,AX
;
-
-
-
-
-
-
-
MOV
---
-
-
-
-
-
-S-P-,
O- -F-F S- E- T-
-
T-O-S-
-
-
-
-
-
-
-
-
; GET STACK VALUE ; SET THE STACK UP ; STACK IS READY TO GO
;
I NIT I AL I ZE THE 8259 I NTERRUPT CONTROLLER CH I P
MOV OUT NOV OUT ~OV OUT
NOV OUT
AL,I3H INTAOO,AL AL,B INTAOI,AL AL,9 INTAOI,AL
AL,OFFH INTAOI,AL
ICWI - EDGE, SNGL, ICW4 SETUP ICW2 - INT TYPE 6 (8-Fl SETUP ICW4 - BUFFRD,8086 MODE
MASK ALL I NTS. OFF (VIDEO ROUTINE ENABLES INTS.I
03:
SET UP THE I NTERRUPT VECTORS TO TEMP INTERRUPT
PUSH MOV 5UB MOV MOV STOSW MOV STOSW LOOP
as
CX,32 01,01
EStDI AX,OFFSET
01 L
AX,CS
03
FILL ALL 32 INTERRUPTS FIRST INTERRUPT LOCATION SET ES;OOOO ALSO NOVE ADDR OF I NTR PROC TO TBL
GET ADDR OF I NTR PROC SEG
VECTBLO
;----- ESTABLISH BIOS SUBROUTINE CALL INTERRUPT VECTORS
MOV PUSH
DI,OFFSET VIDEO INT
C5
SETUP ADDR TO I NTR AREA
POP MOV MOV MOV
05 AX,OS
51 ,OFFSET CX,I6
VECTOR
, TABLE+16
SETUP ADDR OF VECTOR T A8LE SET AX=SEGMENT
; START WITH VIDEO ENTRY
03A:
MOVSW
INC
01
INC
01
~OVE VECTOR T ABLE TO RAM SK I P SEGMENT PO INTER
;
----
-
LOOP
---- -----
-
D3A
- --
-
-
-
---------
-
;
DETERMINE CONFIGURATION AND MFG. MODE
038:
POP PUSH IN ANa MOV MOV OUT NOP IN MOV ROL AND OR SUB MOV MOV OUT CALL CMP
"E
CMP
"NE "MP MOV OUT Nap NOP IN AND
"NZ INC
05
os
AL,PORT C
AL,OoooTlllB
AH,AL AL,I0IOIIOE8 PORT_8,AL
RECOVER DATA SEG GET SWITCH INFO ISOLATE SWITCHES SAVE ENABLE OTHER BANK OF SWS.
AL,PORT C
CL,4
AL,CL
I ROTATE TO HIGH NIBBLE
AL. 111 100008
; ISOLATE
AL,AH
; COMBINE WITH OTHER BANK
AH,AH
~~~~9~ORDIOFFSET EQUIP _FLAG I ,AX : SAVE SWITCH INFO
CMD PORT ,AL KBO-RESET
BL,OAAH E6
8L,065H 03B MFG BOOT AL,36H
PORT_B,AL
SEE IF MFG · ..JUMPER IN KEY80ARD PRESENT?
LOAD MFG. TEST REQUEST?
GO TO BOOTSTRAP IF SO
AL,PORT A AL,OFFHE6 DATA_AREA[OFFSET MFG_TST]
WAS
DATA LINE GROUNDED ; SET NANUFACTUR ING TEST FLAG
5-118 PC-XT System BIOS (11/08/82)
LOC OBJECT
E242 E242 AII004 E245 50 E246 B030 E248 A31 004 E24B 2AE4 E240 COlO E24F B020 E251 A31004 E254 2AE4 E256 COlO E258 58 E259 A31004
E25C 2430 E25E 750A E260 8F4000 E263 C7054BFF E267 E9AOOO E26A E26A 3C30 E26C 7408 E26E FEC4 E210 3C20 E212 1502 E214 B403 E216 86EO E218 50 E219 2AE4 E218 CD I 0 E210 58 E21E 50 E27F 880080 E282 8A8803 E285 890008 E288 BOO I E28A 80FC30 E280 7409 E28F B788 E291 8A0803 E294 8520 E296 FEC8 E298 E298 EE E299 813E12043412 E29F 8EC3 E2A I 7407 E2A3 8EDB
E2A5 E8Cl03 E2A8 1546
E2AA E2AA 58 E2AB 50 E2AC 8400 E2AE COlO E280 882010
E283 E81 I E2C3 E2C3 E99915
E2C6 E2C6 2BFF E2C8 B92800 E2CB F3 E2CC AB
E2CO 58 E2CE 50 E2CF 80FC30 E202 BA8A03 E205 7403 E201 8AOA03 E20A E20A 8408 E20C E20C 2BC9 E20E E20E EC E2DF 22C4 E2EI 1504 E2E3 E2F9 E2E5 EB09 E2El E2E7 28C9 E2E9 E2E9 EC E2EA 22C4 E2EC 741 1 E2EE E2F9
LINE SOURCE (BIDS FOR THE [8M PERSONAL COMPUTER XTI 11/08/82
634
635
INITIALIZE AND STARl CRT CONTROLLER "(6845)
636
TEST VIDEO READ/WRI1E STORAGE.
637
DESCR I PT I ON
636
RESET THE V IDEO ENABLE SIGNAL.
639
SELECT ALPHANUMER I C MODE. 40 25. B & W.
640
READ/WRITE DATA PATTERNS TO STG. CHECK STG
641
ADDRESSA81 L I TY.
642
ERROR = I LONG AND 2 SHORT 8EEPS
6.3 ~~~------------- - - - - - - ----------- - - -------- - -
64.
6.5 646
"OV PUSH
AX,DATA WORD[OFFSEl EQUIP FLAG1 , GET SENSE SWITCH IM'"O
AX
-
; -SAVE IT
647 648 649
"OV
"OV SUB
AL.30H
DATA WORolOFFSET EQUIP FLAG] ,AX
~.AR
650
INT
10H
; SEND INIT TO B/W CARD
651
"OV
AL.20H
652 653
"OV SUB
~~;:RWORDIOFFSET EQUIP_F~A~~[/~NIT COLOR CARD
654
INT
, OH
655 656 657 656
659 660
661 662
POP MOV
ANO JNZ MOV MOV JMP
AX
· RECOVER REAL SW J TCH INFO
DATA WORDIOFFSET EQUIP FLAGj,AX ; RESTORE IT
-
-
AND CONTINUE
AL,30H
ISOLATE VIDEO SWS
E7
V [OEO SWS SET TO 07
DI.OFFSET VIDEO INT
; SET [NT 10H TO DUMMY
[01 I ,OFFSET DUMMY RETURN
; RETURN IF NO VIDEO CARD
E18_1
-
8YPASS VIDEO TEST
663 E7: 664
665 666
667 666 669 670 E8: 671 672 673 674 675
eMp JE INC eMP JNE MOV
xeHG
PUSH SUB INT POP PUSH
AL.30H E8 AH AL.20H E6 AH.3 AH.AL AX AH,AH 10H AX
AX
TEST VIDEO: 8/W CARD ATTACHED? YES - SET MODE FOR B/W CARD SET COLOR MODE FOR COLOR CD 80X25 MODE SELECTED?
NO - SET MODE FOR 40X25 SET MODE FOR 80X25 SET MODE: SAVE VIDEO MODE ON STACK INITIALIZE TO ALPHANUMERIC 1.40 CALL VIDEO 10 RESTORE V IDEO SENSE SWS IN AH RESAVE VALUE
676 677 676 679 660
66' 662 663 66. 665
686 667 666 669 690 691
692 693 694 695
E9:
; --
MOV
eX,08000H
8EG VIOEO RAM ADOR B/W CD
MOV
OX.388H
MOOE REG FOR 8/w
MOV
CX,2048
RAM WORO CNT FOR 8/W CD
MOV eMp
AL.l AH,30H
SET MODE FOR BW CARD B / W V IDEO CARD ATTACHED?
JE
E9
YES - GO TEST V IDEO STG
MOV
BH.OB8H
BEG V IDEO RAM ADDR COLOR CD
"OV
DX,308H
MODE REG FOR COLOR CD
MOV
CH.20H
RAM WORD CNT FOR COLOR CD
OEe
AL
SET MODE TO 0 FOR COLOR CD
TEST VIOEO STG:
OUT
DX,AL
, DISABLE VIDEO FOR COLOR CD
e"p
DATA_WORD[OFFSET RESET_FLAG1,1234H ; POD INIT BY K8D RESET7
"OV
ES,8X
; POINT ES TO VIDEO RAM STG
JE
EtO
YES - SKIP VIDEO RAM TEST
MOV
OS,BX
POINT OS TO VIDEO RAM STG
ASSUME OS: NOTH I NG,ES :NOTH I NG
CALL
STGTST CNT
GO TEST VIDEO RIW STG
-
-
-
-
JNE
----
-
-
-
Et 7
-----
-
--
-----
---
-
--
-------·
-
R- -/W---S-TG
FAILURE
-
BEEP
SPK
696 ; 697 ;
SETUP VIDEO DATA ON SCREEN FOR VIDEO LINE TEST.
696
OESCR (PT I ON
699
ENABLE V IDEO SIGNAL AND SET MODE.
700 70 ,
-------D-IS-P-L-A Y A HORIZONTAL 8AR ON SCREEN.
702 El0:
703
POP
AX
GET VIDEO SENSE SWS (AHI
70'
PUSH
AX
SAVE IT
705 706
707 706
MOV INT MOV
AH,O
'OH AX, T020H
ENABLE V IDEO AND SET MODE VIDEO WRT BLANKS I N REVERSE V IDEO
709 710
- UNNATURAL ACl FOR ADORESS COMPATIBILITY
7"711
JMP ORG
SHORT E I OA OE2C3H
713
J"P
NMI_INT
714
715 EIOA:
716 717 716
SUB
"OV REP
01,01 CX,40 STOSW
SETUP START I NG LaC NO. OF BLANKS 10 DISPLAY WRITE VIDEO STORAGE
719 ; - - - ----------------- - - - - - - - -- - ----- ----
7"720 ;
CRT INTERFACE LINES TEST
; DESCRIPTION
:
722
SENSE ON/OFF TRANSITION OF THE :
723 72. 725
V IDEO ENABLE AND HOR I ZONTAL SYNC LINES.
772"6
728 729 730
73' 732 EI I : 733
POP PUSH CMP MOV JE MOV
MOV
AX AX AH,30H OX. 03BAH Ell OX, 03DAH
AH.e
GET VIDEO SENSE SW INFO SAVE IT B/W CARD ATTACHED? SETUP ADDR OF 8W STATUS YES - GO TEST LINES COLOR CARD I S ATTACHED LlNE_TST:
PORT
734 735 736
E12: E13:
SUB
CX.CX
OFLOOP_CNT;
737
738
739 740 741 742 E14:
IN AND JNZ LOOP JMP
AL,OX AL. AH E14 EI3 SHORT E17
READ CRT STATUS PORT CHECK V1DEOfHORZ LINE
ITS ON - CHECK IF IT GOES LOOP TILL ON OR TIMEOUT GO PR I NT ERROR MSG
OFF
143
744 E15: 745 746 747 748
SUB
IN AND --IZ LOOP
CX ,CX
AL,DX AL,AH E16 EI5
READ CRT STATUS PORT CHECK VIDEO/HaRZ LINE ITS ON - CHECK NEXT LINE LOOP IF OFF TILL IT GOES ON
PC-XT System BIOS (11/08/82) 5-119
LOC 08.JECT
E2FO E2FO IF E2FI IE E2F2 C606 I 50006 E2FT 8A020 I E2FA E80816 E2FD EB06 E2FF E2FF 8103 E30 I 02EC E303 1507 E305 E305 58 E306 8400 E308 COlO E30A E30A 8AOOCO E300 E300 BED" E30F 2BOB E31 I 8B07 E313 53 E31~ 58 E3 j 5 3055AA E318 7505 E31A E83616 E310 EB04 E31F E31F 81C28000 E323 E323 8\FAOOC8 E327 7CE4
E329 IF
E32A C606 I 50405
E32F BOOO E331 E621 E333 E421 E335 OACO E337 151B E339 BOFF E33B E621 E330 E42' E33F 040 I E341 7511
E343 A26B04 E346 F8 E341 28C9 E349 E349 E2FE E34B E34B E2FE E340 803E6B0400 E352 7409 E354 E354 BEFFF890 E358 EME 16 E35B FA E35C F4
E350 E350 C606150402
E362 BOFE E364 E621 E3668010 E368 E643 E36A B91600 E360 8AC' E36F E640 E311 E37 I F6066B040 I
E316 7504 E318 E2F7 E31 A EBD8 E37C
E37C BI ac
E31E BOFF E360 E640 E382 C606680400 E381 BOFE E389 E621 E38B E36B F60668040 I E390 15C2 E392 E2F1
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XTI II f08/82
149 E17:
150
POP
OS
151
PUSH
OS
152 153
"OV "OV
OS: MFG ERR FLAG, 06H OX,I02H -
<><><>CRT ERR CHKPT. 06<><><>
154
CALL
ERR BEEP
GO BEEP SPEAKER
155
J"P
SHOR1 EI8
15' E16: 151
"OV
CL,3
NXT LINE: GE1~NEXT B[T TO CHECK
158
5HR
AH.CL
159
JNZ
EI2
GO CHECK HORIZONTAL LINE
160 E18:
DISPLAY CURSOR:
,,'"..23
POP MOV INT
AX AH,O 10H
GET V 10EO SENSE 5'1115 (AH I SET MODE AND 0 I SPLA Y CURSOR CALL V IDEO I /0 PROCEDURE
164
165 166 E 18A:
MOV
DX,ocaOOH
SEE JF ADVANCED VIDEO CARD
161
MOV
DS,OX
I S PRESENT
"8 169 110
SUB
"OV PUSH
BX,8X
AX, (BX I
BX
GET FIRST 2 LOCATIONS
111
POP
BX
112
e"p
AX, aAA55H
LET BUS SETTLE PRESENT?
113
JNZ
E I BB
N07 GO LOOK FOR OTHER MODULES
114
CALL
ROM CHECK
GO SCAN MODULE
115 116 EI8B:
J"P
SHORT E 18C
111
ADD
OX.0080H
POINT TO NEXT ZK BLOCK
118 EI8CI
119
eMP
DX,OCBoaH
TOP OF V IDEO ROM AREA YET?
180
JL
EI8A
181 ; - - ---------------- - - - -
-- ---------CO --S-C-AN- F-OR ANOTHER MODULE
182 ;
8259 INTERRUPT CONTROLLER TEST
183
OESCR I PT I ON
184
READ/WRITE THE INTERRUPT MASK REGISTER, IMR)
185
WITH ALL ONES AND ZEROES. ENABLE SYSTEM
18.
INTERRUPTS. MASK DEVICE INTERRUPTS OFF. CHECK
181
FOR HOT INTERRUPTS WNEXPECTEDI.
188
189
ASSUME os: ABsa
190 C21 :
POP
OS
191
192
TEST THE I~R REGISTER
193
194 C21 A: 195
DATA AREA[OFFSET MFR ERR FLAG} ,05H
-
- iooooooOOOOOO
196
; <><><>CHECKPOiNT 5<><><>
191
MOV
AL,O
; SET IMR TO ZERO
198
OUT
INTA01,AL
199
IN
AL,INTAOI
READ IMR
800
OR
AL,AL
IMR O?
801 802
IN, MOV
06 AL,OFFH
GO TO ERR ROUTINE IF NOT 0
o I SABLE DEV I CE INTERRUPTS
803
OUT
INTAOI,AL
WRITE TO IMR
804
IN
AL,INTAal
READ IMR
805
AOO
AL, I
ALL IMR BIT ON?
80'
JNZ
D6
NO GO TO ERR ROUT I NE
801
808
CHECK FOR HOT INTERRUPTS
809
810
I NTERRUPTS ARE MASKED OFF. CHECK THAT NO I NTERRUPTS OCCUR.
811
812 813
"OV ST I
DATA_AREAl OFFSET INTR FLAGI.AL ,CLEAR INTERRUPT FLAG
~
ENABLE EXTERNAL INTERRUPTS
814
SUB
CX,CX
WA I T 1 SEC FOR ANY I NTRS THAT
815 04;
816
LOOP
04
; MIGHT OCCUR
811 05:
818
LOOP
05
819 820 821 06:
eMP
J'
DATA AREAloFFSET INTR FLAG),OOH ; DID ANY INTERRUPTS OCCUR?
01 -
-
NO - GO TO NEXT TEST
822
MOV
S I · OFFSET EO
; OISPLAY 101 ERROR
823
CALL
E_MSG
824
eLI
825
HL T
; HALT THE SYSTEM
82.
821 ;
B253 TiMER CHECKOUT
828 ; DESCRIPTION
:
829
VERIFY THAT THE SYSTEM TIMER. 01 DOESN'T COUNT :
830
TOO FAST OR TOO SLOW.
831
832
833 834
MOV
DATA- AREA[OFFSET
MFR -
ERR I
FLAGI,02H <><><><><><><><><><><><><><><><>
835
; <><><>TIMER CHECKPOINT 12f<><><>
836
MOV
AL,OFEH
; MASK ALL I NTRS EXCEPT LVL 0
831
OUT
INTAO I ,AL
; WRITE THE 8259 IMR
838 839
MOV OUT
AL. 000 I 00008 TlIo4 CTL,AL
SEL TIM 0, LS8. MODE 0, BINARY WR I TE T I MER CONTROL MODE REG
840
MOV
CX,16H
SET PGM LOOP CNT
841 842
MOV OUT
AL,CL TIMERO,AL
SET TIMER 0 CNT REG
a WR I TE TI ~ER CNT REG
843 08:
844 845
OATA_AREA[OFFSET INTR FLAG),OIH
~
0 lOT I MER 0 1NTERRUPT OCCUR 7
846 841
IN'
09
LOOP
08
YES CHECK TIMER OP FOR SLOW T I ME WAIT FOR INTR FOR SPECIFIED TIME
848 849 09:
O"P
06
TI~ER 0 INTR O[DN'T OCCUR ERR
850 851
"OV MOV
CL,I2 AL,OFFH
SET PGM LOOP CNT
WRITE TIMER a CNT REG
852
OUT
TlMERO ,AL
853 854 855
MOV MOV OUT
DATA AREA[OFFSET INTR FLAGI,O ; RESET INTR RECEIVEO FLAG
AL I OFEH
- ; REENABLE T I ~ER 0 I NTERRUTS
INTAOI,AL
856 010:
851
TEST
DATA AREAIOFFSET INTR FLAGI,OIH ; DID TIMER a INTERRUPT OCCUR?
858
IN,
06 -
- ; YES - TIMER CNT[NG TOO FAST. ERR
859
LOOF'
010
; WAIT FOR INTR FOR SPECIFIED TIME
8.0
5-120 PC-XT System BIOS (11/08/82)
LOC OBJECT
E394 BOFF E396 E621 E398 B036 E39A E643 E39C BOOO E39E E640 E3AO E640
E3A2 E3A2 8099 E3A4 E663 E3Ab AO I 004 E3A9 240 I E3AB 1431 E3AO 803E 12040 I E3B2 142A E384 E81316 E3B1 E31 E E389 B049 E388 E661 E3ElD 80FBAA E3CO 1515
E3C2 80C8 E3C4 E661 E3C6 B048 E3C8 E66 t E3CA 28C9 E3CC E3CC E2FE E3CE E460 E300 3COO E3D2 140A E304 E88415 E301 E301 8E4CEC90 E308 E8CB 15
E30E E3DE IE E3DF 28CO E3Et 8ECO E3E3 890800 E3E6 OE E3E1 IF E3E8 BEF3FE90 E3EC BF2000 E3EF E3EF A5 E3FO 41 E3FI 41 E3F2 E2FB E3F4 IF
E3F5 Cl0608005FF8 E3FB Cl06140054FF E401 C106620000F6
E401 803E 12040 I E40C 750A E40E C10610003CF9 E414 BOFE E416 E621
LINE SOURCE IBIOS FOR THE IBM PERSONAL COMPUTER XTI 11/08/82
8bl
SETUP T I MER 0 TO MODE 3
8b2 8b3
MOV
AL,OFFH
o I SABLE ALL DEV I CE INTERRUPTS
804
OUT
INTAOI,AL
8b5
MOV
AL.36H
SEL TIM O,LSB.MSB.MODE 3
8bb
OUT
TiMER+3.AL
WR I TE T I MER MODE REG
867
MOV
AL,O
8b8
OUT
TIMER,AL
WRITE LSB TO TIMER 0 REG
8b9 870
-- ---- ------------- -- OUT
TIMER,AL
--- ----- - ---
; WRITE MSB TO TIMER 0 REG
----- ---
871
I(EYBOARD TEST
872
DES~IPTION
:
873
RESET THE KEYBOARD AND CHECI( THAT SCAN :
874
CODE · AA' I S RETURNED TO THE CPU.
------------------ 815
CHECI( FOR STUCK KEYS.
81b +~; ~ ~ ~--
811
818
MOV
AL.99H
; SET 8255 NODE A.C= IN B=OUT
87.
OUT
CMD PORT, AL
860
MOV
AL.DATA AREA[OFFSET EQUIP FLAG]
881
ANa
AL.OI -
;-TEST CHAMBER?
882
JZ
Fl
; BYPASS IF SO
883 88.
CMP
~;TA_AREA[DFFSET MFG_TST~ '~ES _ ;K~~N~~~~6~:~N~E~~ST MODE?
JE
885 88b
CALL ,Jcxz
K8D RESET F6 -
; I SSUE RESET TO I(EYBRD ; PRINT ERR NSG IF NO INTERRUPT
887 888
"OV OUT
AL.49H PORT S,AL
; ENABLE KEYBOARD
88'
CMP
BL.OAAH
SCAN CODE AS EXPECTED?
890
JNE
Fb
NO - 0 I SPLA Y ERROR MSG
891
892 ;----- CHECK FOR STUCI( KEYS
893
89'
MOV
AL,aC8H
CLR KBD. SET CLK LINE HIGH
8.5
OUT
PORT B,AL
89b
MOV
AL,48H
ENABLE KBD,CLK IN NEXT BYTE
891
OUT
PORT B,AL
8'8
SUB
CX.CX
899 F5:
KBD WAIT:
900
LOOP
F5
DELAY FOR A WHILE
90 I
IN
AL.KBD IN
CHECK FOR STUCK KEYS
902
CMP
AL,a -
SCAN CODE = O?
'9003.
905 F6:
JE CALL
F7 XPC_BYTE
; YES - CONTINUE TESTING ; CONVERT AND PR [NT
90b
MOV
51 ,OFFSET FI
; GET MSG AOOR
--------- - 907
908 ;
CALL
E_MSG
; PR I NT MSG ON SCREEN
----- ----- - ---- - -- - - - - ------- --- ----
909 ;
'10
' "912
913
SETUP HARDWARE INT. VECTOR TABLE
PUSH SUB
as
AX,AX
- SETUP I NT_TABLE:
91.
MOV
ES, AX
915 91b
,9,187 "9
.20 F1A:
MOV PUSH POP MOV MOV
CX.08
cs as
S I .OFFSET
DI.OFFSET
VECTOR TABLE INT_PTR
GET VEC TOR CNT SETUP OS SEG REG
921
MQVSW
922
INC
01
SK I P OVER SEGMENT
923
INC
01
924
LOOP
F7A
925
POP
as
92b
921 ;----- SET UP OTHER INTERRUPTS AS NECESSARY
928
'29
MOV
NMI PTR,OFFSET NMI INT ; NMI INTERRUPT
930 931
MOV MOV
~~~iC:~~R~~~~~!o6~TNT~SC~E~~GMEN+ ~~~N~A;~~~~~ BAS I C
932
933 ;----- SETUP TIMER 0 TO BLINK LED IF MANUFACTURING TEST NODE
'34
'35
CMP
OATA_AREA[OFFSET MFG_TST),OIH ; MFG. TEST MODE?
.9337b
938
JNZ
"DV MOV
EXP 10
WORi:i PRT! ICW4) ,OFFSET BLINK INT; SETUP TIMER INTR TO ELINK LED
AL.OFEH
; ENABLE T I MER INTERRUPT
939
OUT
INTAOI,AL
PC-XT System BIOS (11/08/82) 5-121
LOC 08,JECT
E418 E4188AI002 E418 885555 E41 E EE E41F 8001 E421 EC E422 3AC4 E424 7544 E426 F700 E428 EE E429 8001 E428 EC E42C 3AC4 E42E 753A
E430 E430 880 I 00
E433 8A 1502 E436 891000 E439 E439 2E8807
E43C E430 E43E E440 E442
90 EC 3AC 7 7521 42
E443 EC E444 3AC3 E446 7518 E448 4A E449 0lE3
E44B E2EC
E44D B90800 E450 BOO I E452 4A E453 E453 8AEO E455 EE E456 BOO 1 E458 EC E459 3AC4 E45B 7506 E450 OOEO E45F E2F2 E461 EB07 E463 E463 BEOFF99Q E467 E83FI5
LINE
940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981
982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 100 I
SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XTI 11/08/82
- - - ----- ----- - - - - -- - - - -- - - ------- ----- - - ------ - -----
; EXPANS ION 1/0 BOX TEST
CHECK TO SEE IF EXPANSION BOX PRESENT
IF INSTALLED,
·
TEST DATA AND ADDRESS BUSES TO 110 BOX
; ERROR,,'180I'
DETERMINE IF BOX IS PRESENT
EXP_10:
""00''
OUT
"0'
IN
C"P JNE NOT
OUT
"0'
IN
C"P JNE
OX,OZIOH AX ,5555H OX.AL AL,OIH AL,OX AL.AH EI9 AX OX,AL AL,OIH AL.OX AL,AH EI9
;- --- CHECK ADDRESS BUS
EXP2:
EXP3:
MO' NOP IN
C"P JNE INC IN CMP JNE DEC SHL
LOOP
BX, 000 I H DX,0215H CX,0016
CS: [BX] .AL
AL,OX AL,BH EXP ERR OX AL.OX AL ,8L EXP ERR OX BX, I EXP3
---- CHECK DATA BUS
MOV
"0'
DEC
EXP4:
"0'
OU7
"IN0'
CMP
JNE
SHL
LOOP
J"P EXP ERR:
-
MOV
CALL
CX.0008 AL,OI
ox
AH,AL DX,AL AL,O IH
AL,DX AL,AH SHORT EXP_ERR AL.l EXP4 SHORT E19
S 1, OFFSET F3C E_MSG
ICARD WAS ENABLED EARLIER) CONTROL PORT AOORESS SET OATA PATTERN
MAKE AL DIFFERENT RECOVER OAT A
REPLY? NO RESPONSE, GO TO MAKE OATA=AAAA
NEXT
TEST
RECOVER DATA
LOAD HI AOOR. REG ADDRESS GO ACROSS 16 BITS WR I TE ADDRESS FOOOO+8X
READ ADDR. HIGH GO ERROR IF MISCOMPARE DX=216H IADDR. LOW REGI COMPARE TO LOW ADDRESS OX BACK TO 2 I 5H
LOOP TILL 'I' WALKS ACROSS BX
DO 8 TIMES
MAKE DX=214H (OATA BUS REGI
SAVE DATA BUS VALUE
SEND VALUE TO REG
RETR I VE v ALUE FROM REG
TO SAVED VALUE FORM NEW OAT A PATTERN LOOP TILL BI T WALKS ACROSS AL GO ON TO NEXT TEST
5-122 PC-XT System BIOS (11/08/82)
LOC OBJECT
E4E:>A
E4E:>A
E8EC 15 E4E:>O
IE E46E
E46E
813E72003412 E474
7503 E476
E99FOO E479
E479
B81000 E47C
EB28 E47E
E41E
8B1E1300 E482
83EBI0 E485
BI04 E481
D3EB E489
8BCB E48B
BB0004 E48E
E48E
8EDB E490
8EC3 E492
81C30004 E496
52 E491
51 E0498
53 E0499
50 E49A
B90020 E49D
E8CFO 1 E4AO
754C E4A2
58 E4A3
051000 E4AE:>
E4AE:>
50 E4A 7
BBOAOO E4AA
B90300 E4AD
E4AD
3302 E4AF
F7F3 E4B 1
80CA30 E4B4
52 E4B5
E2F6 E4B7
B90300 E4BA
E4BA
58 E4BB
E8DE14 E4BE
E2FA E4CO
B90700 E4C3
BE 1AEO E4CE:>
E4C6
2E8A04 E4C9
04E:> E4CA
E8CF14 E4CD
E2F7 E4CF
58 E4DO
301000 E4D3
74A9 E4D5
58 E406
59 E407
5A E4D8
E284 E4DA
800A E4DC
E8Bo14
E4DF E408 E4El 2401 E4E3 7533 E4E5 IF E4E6 C606150003 E4EB E966FE
E4EE 8AE8 E04FO 8000 E04F2 E8A714 E4F5 800A E04F7 E8A214 E4FA 58 E4FB 83C406 E4FE 8CDA E500 1F ESDI IE E502 A31300
E505 88361500
E509 E8CE 1A E50C 8AC5 E50E E87A14 E511 8E04F990 E515 E89114
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER Xl) 11/08/82
1002 1003 1004 1005 1006 1007 1008 1009 1010 101 I 1012 1013 10 I 4 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 102E:> 1027 1028 1029 1030 1031 1032 1033 1034 1035 103E:> 1037 1038 1039 1040 1041 1042 1043 1044 1045 104E:> 10047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 lOE:>O 1061 10E:>2 lOE:>3 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 107E:> 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
'091 1092 1093 1094 1095 1096 1097 1098 1099 I 100 I 101
ADD I T I ONAL READ tWR I TE 5 TOR AGE TEST ; DESCRIPTION
WRITE/READ DATA PATTERNS TO ANY READ/WRITE
STORAGE AFTER THE FIRST 32K. STORAGE
---------- ;
; ---
ADDRESSAB I L I TY IS CHECKED.
E19:
ASSUME DS:DATA
CALL
005
PUSH
05
E20 :
E20A:
eMP JNE JMP
RESET FLAG, 1234H
E20A
ROM_SCAN
WARM START? CONTINUE TEST IF NOT GO TO NEXT ROUT I NE I F SO
E20B:
MOV JMP
AX.16
SHORT PRT_SIZ
STARTING AMT. OF MEMORY OK POST MESSAGE
MOV
SUB MOV
BX,MEMORY SIZE
BX,16
CL,O.H
GET MEM. 5 I ZE WORD 1ST 16K ALREADY DONE
SHR
BX,CL
DIVIDE BY 16
E21 :
MOV MOV
CX,BX
BX,O.OOH
SAVE COUNT OF 16K 8LOCKS SET PTR. TO RAM SEGMENT> 16K
MOV MOV
Os,BX
Es,8X
SET sEG. REG
AOO PUSH PUSH PUSH PUSH
BX,0400H
OX
CX
BX
AX
POINT TO NEXT 16K sA.VE WORK REGS
MOV
CX.2000H
SET COUNT FOR 8K WORDS
CALL JNZ POP
AOO
sTGTST CNT
E21 A
AX
AX,I6
GO PR I NT ERROR RECOVER TESTED MEM NUMBER
PRT SIll
-
PUSH
AX
MOV
MOV
DECIMAL LOOP: -XOR
eX,lo
CX,3
DX,DX
SET UP FOR DEC I MAL CONVERT OF 3 NIBBLES
OIV OR
BX
DL,30H
DIVIDE BY 10
MAKE INTO ASCII
PUSH LOOP MOV
DX DEC I MAL LOOP
CX,3
SAVE
PRT DEC LOOP:
-
-POP
CALL LOOP MOV
AX
PRT HEX
PRT-DEC LOOP
CX,1
RECOVER A NUMBER
MOV
K8 LOOP:
-
MOV
INC
CALL
LOOP
POP
5 I ,OFFSET F3B
AL,CS; [SI]
51
PRT HEX
KB CooP
AX
PRINT KB OK' RECOVER WORK REGS
CMP JE
AX, I 6
E208
FIRST PASS?
POP POP POP LOOP MOV CALL
BX
CX
ox
E21
AL.IO
PRT_HEX
; LOOP TILL ALL MEM. CHECKED ; LINE FEED
DMA TCO SHOULD BE ON BY NOW SEE I FIT IS
IN ANa JNZ POP MOV
JMP
AL,OMA+08H
AL,OOOOOOOIB
ROM SCAN
OS
MFG ERR FLAG,03H
06 -
TCO STATUS BIT ON7 ; GO ON WITH NEXT TEST IF OK
; <><><><><><><><><><><><><> ; POST 101 ERROR MSG AND HALT
PRINT FAILING ADDRESS AND XOR'ED PATTERN IF DATA COMPARE ERROR
E2IA:
MOV MOV CA.LL MOV CA.LL POP ADO MOV POP PUSH MOV
CALL MOV CALL MOV CALL
CH,AL
AL.13
PRT HEX
AL, To
PRT HEX
AX SP,6 DX.Os
as
OS
MEMORY_SIZE,AX
MFG_ERR_FLAG.OH
PRT sEG AL,CH
XPC BYTE
51 ,OFFSET E I
E_MSG
SAVE FAILING BIT PATTERN CARR AGE RETURN
RECOVER AMT. OF GOOD MEM. BALANCE ST ACK GET FAILING SEGMENT
LOAD MEM. SIZE WORD TO SHOW HOW MUCH MEM. WORK I NG <> <> <> <> <> <> <> <><><> <> <><> <><>CHECKPO I NTS 08->AO<><> PRINT IT GET FAILING BIT PATTERN CONVERT AND PR I NT CODE SETUP ADDRESS OF ERROR MSG PRINT ERROR MSG
PC-XT System BIOS (11/08/82) 5-123
LOC OBJECT
E518 E518 BAOOC6 E5!B E51B 8EDA E51D 28DB E51F 8807 E521 53 E522 58 E523 3D55AA E52t;, 1506 E528 E82814 E528 E80590 E52E E52E 8! C28000 E532 E532 81FAOOFo E530 7CE3 E538 E80190
E53B E53B B404 E53D E530 280B E53F 8EOA
E541 E8AE13 E544 1403 E540 E88201 E549 ES49 81C20002 E54D FECC E54F 1SEC
E551 ES51 IF E552 AO I 000 E555 240 I E557 743E E559 E559 E421 E55B 24BF E550 E021 E55F B400 E561 8AD4 E563 CDI3 E5&5 F6C4FF E5&8 1520
E5&A BAF203 E5&0 BOIC E56F EE E570 2BC9 E572 E512 E2FE E574 E574 E2FE E57& 3302 E518 B501 E51A 88163EOO E51E E8FC08 ES81 1201 ES83 8S22 E585 E8F508 E588 1301 E58A E58A BE52EC90 E58E E81814
E591 E591 BOOC E593 SAF203 ES96 EE
E597 f597 Co066BOOOO E59C BEIEOO E59F 89361 AOO E5A3 89361COO E5A1 893&8000 E5AB 83C620 E5A.E 89368200 E5B2 BF7800 E585 IE E5B6 01 E581 B81414 E5BA AB ESBB A8 E5BC 880101 E5BF AS ESCO AB E5CI E421 ESC3 24FC E5C5 E621
LINE
1102 1103 1104 1105 1106 1107 1\08 I 109 1110 11I1 1112 I I 13 I I 14 I I 15
""b 7
118 II' 120 121 122 123 12.
12' 12b 127 128
12' 130 131 132 133
13' 13. 13b 137 138
,,1..30,'
"2 "3
1145 1146 1141 1148 I 149
: :;~
1152
1S3 IS. ISS ISb 1S7 1S8 IS. 160
1'.621
163
lb' 16. I bb I b7 I b8 I 169 I 170 1111 1172 1173 1114 1175 1 176 1111 1118 1119 1180 118 I 1182 1183 1184 1185 1186 187 188 18.
,1.9,0
"2 193 19. 1\95 1196 1191 1198 1199 1200 1201 1202 1203 1204 1205 1206 1201 1208 1209 1210 121 \ 1212 1213 1214 1215 1216
SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XTl 11/08/82
; - - -- -- ------ --- ------- -- - --- - - - - - - - ------ ------- -- - - - ---- - -
; CHECK FOR OPTIONAL ROM FROM C8000->F4000 IN 2K BLOCKS
;
(A VALID MODULE HAS '55AA' IN THE FIRST 2 LOCATIONS,
LENGTH INDICATOR ILENGTH/512) IN THE 3D LOCATION AND
----- ----- -TESTI-IN- -IT--. --C-OD-E- --S-T-A-R-T-IN-G-- -IN- THE 4TH LOCATION.I
ROM SCAN;
-
MOV
ROM SCAN 1:
-
MOV
DX,OC800H DS,DX
SET BEGINNING ADDRESS
SUB
"OV PUSH
POP
COP JNL
CALL
""P NEXT ROM;
-
ADD
ARE WE DONE:
I;JX.8X AX. [BX] BX BX AX,OAA55H NEXT ROM ROM CHECK ARE:WE_DoNE
DX.0080H
SET 8X=OOOO GET I ST WORD FROM MODULE
BUS SETTL I NG · = TO 10 WORD? ; PROCEED TO NEXT ROM IF' NOT
GO CHECK OUT MODULE CHECK FOR END OF ROM SPACE
Po I NT TO NEXT 2K ADDRESS
- - CMP
OX. OF600H
AT F6000 YET?
')L
ROM SCAN I
GO CHECK ANOTHER ADD. I F NOT
; - .)MP
BASE_ROI(~CHK
GO CHECK BASIC ROM
- ~ - ~~~~~~~~- ~; ~~~ -~~~-;~~-~ ~~;,-~~~~~~; -~~~;~~~~~~- ~~; ~~ -~~~~---------
- ~~~~-~~~ -~~;~ ------ - ------
E4:
MOY
AH,4
NO. OF ROS MODULES TO CHECK
SUB "OV
8X,BX OS,DX
SETUP START I ~G ROS ADDR
CALL
RoS_CHECKSUM
I CHECK ROS
JE
ES
CALL
ROM_ERR
E5:
CONTINUE IF OK POST ERROR
ADO
DX,0200H
POINT TO NEXT 8K MODULE
DEC
AH
ANY MORE TO DO?
-- ; --------JN-Z- - - --
£. --
-
--
-------
-----
~ - - - - ---Y-ES--- CONTINUE
;
DISKETTE ATTACHMENT TEST
DESCR I PT I ON
CHECK IF IPL DISKETTE DRIVE IS ATTACHED TO SYSTEM. IF
ATT ACHED, VER I FY STATUS OF NEC FDC AFTER A RESET. ISSUE
A RECAL AND SEEK CMD TO FOG AND CHECK STATUS. COMPLETE
SYSTEM INiTIALIZATION THEN PASS CONTROL TO THE BOOT LOADER PROGRAM.
F9:
FlO:
POP
"OV AND
"Z
IN AND OUT
"OV "OV INT TEST JNZ
OS
AL,BYTE PTR EQUIP FLAG
AL,OIH
-
FIS
AL,INTAOI AL.OBFH INTAO I .AL AH,O DL,AH
13H AH,OFFH Fl3
0' SKETTE PRESENT ~
NO - 8YPASS DISKETTE TEST
DISK_TEST:
ENA8LE 0 I SKETTE INTERRUPTS
RESET NEC Foe SET FOR DR I VE 0 VER lFY STATUS AFTER RESET STATUS OK? NO - FDC FAILED
TURN DR I VE 0 MOTOR ON
FII: F12:
F13;
"OV "OV OUT SUB
LOOP
LOOP XOR "OV "OV CALL JC "OV CALL JNC
"OV CALL
DX.03F2H AL,ICH DX,AL CX,CX
FII
Fl2 OX,DX CH,I SEEK STATUS ,OL SEEK Fl3 CH,34 SEEK Fl.
51 ,OFFSET F3 E_MSG
; ----- TURN DR I VE 0 MOTOR OFF
GET ADDR OF FDC CARD TURN MOTOR ON. EN DMA/INT WR I TE FDC Co~TROL REG
MOTOR WAIT: WA I T FOR 1 SECOND MOTOR_WAITI:
SELECT DR 1YE 0 SELECT TRACK I
RECALIBRATE DISKETTE GO TO ERR SUBRoUT I NE IF ERR SELECT TRACK 34 SEEK TO TRACK 34 OK. TURN MOTOR OFF DSK ERR: GET-AOOR OF MSG GO PR I NT ERROR MSG
F14:
"OV MOV
OUT
AL,OCH DX,03F2H DX,AL
ORO OFF: TURN OR I VE 0 MOTOR OFF FDC CTl ADDRESS
SETUP PRINTER AND RS232 BASE ADDRESSES IF DEVICE ATTACHED
F15:
"OV "OV "OV "OV "OV ADO
"OV "OV PUSH POP
"OV SToSW STOSW
"OV STOSW
STOSW tN
AND OUT
I NTR FLAG, OOH S I · OJ!"FSET K8 BUFFER BUFFER HEAD,51 BUFFER-TA I L. 5 I
SET STRAy INTERRUPT FLAG = 00 SETUP KEYBOARD PARAMETERS
BUFFER-START. S I 51,32 -
BUFFER END. S I
;DEFAULT BUFFER OF 32 BYTES
DI.OFFSET PR I NT TIM OUT ;5ET DEFAULT PRINTER TIMEOUT
OS
-
ES AX.1414H
; DEFAULT=20
AX. 0 10 1H
;RS232 OEFAUl T=OI
AL,INTAO I AL,OFCH INTAOI,AL
; ENABLE T I MER AND KB I NTS
5-124 PC-XT System BIOS (11/08/82)
LOC OBJECT
ESC1 83FDOO
ESCA 1419 ESCC BA0200 ESCF E80614 ES02 BE09E890 ES06 E8F 113 ES09 ES09 B400 ESOB C016 ESOO 80FC38 ESEO 15F1 E5E2 EBOE90 ESE5 E5E5803E120001 ESEA
1406 E5EC
BA0100 E5EF
E8E613 ESF2
AO 1000 ESF5
2401 E5F1
1503 E5F9
E95FFA E5FC
2AE4 ESFE
A04900 E601
COlO E603
E603
BDA3F990 E601
BEOOOO E60A
E60A
2E8B5600 E60E
BOAA E610
EE E611
IE E612
EC E613
IF E614
3CAA E616
1505 E618
895408 E61B
46 E61 C
46 E61D
E61D
4S E61E
45 E61F
81FDA9F9 E623
15E5 E625
BBOOOO E628
BAFA03 E62B
EC E62C
A8F8 E62E
1506 E630
C101F803 E634
43 E635
43 E636
E636
BAFA02 E639
EC E63A
A8F8 E63C
1506 E63E
C101F802 E642
43 E643
43
E644 E644 8BC6 E646 Bl03 E648 D2C8 E64A OAC3 E64C A21100 E64F BAO 102 E652 EC E653 90 E654 90 E655 90 E656 A80F E658 1505 E65A 800Ell0010 E65F
E65F E461 E661 OC30 E663 E661 E665 24CF E661 E661 E669 B080 E66B E6AO E66D E66D CD 19
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
1211 1218 1219 1220 1221 1222 1223 1224 1225 1226 1221 1228 1229 1230 1231 1232 1233 1234 1235 1236 1231 1238 1239 1240 1241 1242 1243 1244 124S 1246 1241 1248 1249 1250 1251 1252 1253 1254 1255 1256 1251 1258 1259 1260 1261 1262 1263 1264 126S 1266 1261 1268 1269 1210 1211 1212 1213 1214 1215 1216 1211 1218 1219 1280 1281 1282 1283 1284 1285 1286 1281 1288 1289 1290 1291 1292 1293 1294 1295 1296 1291 1298 1299 1300 1301 1302 1303 1304 1305 1306 1301 1308
C"P
",
MO;
CALL
"OV
CALL
ERR WAIT:
-
MOV
[NT
C"P
"NE
""P
FI5A: FI5B: FI5C: F16:
Fl1 :
F18:
C"P
"E
"OV CALL MOV ANa "NZ
"S"UPB
"OV [NT
"OV "OV
"OV "OV OUT PUSH [N POP C"P "NE "OV [NC [NC
[NC [NC C"P "NE "OV "OV [N TEST "NZ "OV [NC [NC
"OV [N TEST "NZ "OV [NC [NC
BP,OOOOH
F15A 0 DX,2-
ERR BEEP 51 ,OFFSET F3D P _MSG
AH,OO [6H AH,3BH
ERR WAIT
FI5A
MFG TST, 1
F15A
DX,I
ERR BEEP
AL, BYTE PTR EQU I P FLAG
AL,OOOOOOOIB
F15B
START
AH,AH
AL,CRT MODE 10H
BP,OFFSET F4 5[,0
DX,CS: [BP]
AL,OAAH
DX,AL
as
AL,OX
as
AL,OAAH
FI7
PR INTER BASE[SI] ,OX
51
51
8P 8P BP,OFFSET F4E F16 BX,O OX,3FAH AL,DX AL,OF8H F[ 8 RS232 BASE[BX],3F8H 8X
8X
DX,2FAH AL,OX AL,OF8H F[ 9 RS232 BASE[BX],2F8H 8X
8X
CHECK FOR BP: NON-ZERO I ERROR HAPPENED) CONTI NUE I F NO ERROR 2 SHORT BEEPS (ERROR J
LOAD ERROR MSG
WAIT FOR 'FI' KEY
BYPASS ERROR
MFG MODE BYPASS BEEP I SHORT BEEP (NO ERRORS)
GET SW ITCHES
'LOOP POST' SWITCH ON CONT I NUE WITH BR lNG-UP
CLEAR SCREEN
PRT_SRC_TBL
PRT BASE: GET-PR I NTER BASE ADDR WRITE DATA TO PORT A
BUS SETTLE I NG
READ PORT A
DATA PATTERN SAME NO CHECK NEXT PRT CD YES - STORE PRT BASE AODR I NCREMENT TO NEXT WORD
PO I NT TO NEXT BASE ADOR
ALL POSSIBLE ADDRS CHECKED? PRT BASE POINTER TO RS232 TABLE CHECK IF RS232 CD 1 ATTCH? READ I NTR 10 REG
SETUP RS232 CD '1 ADDR
CHECK IF RS232 CD 2 ATTCH READ I NTERRUPT 10 REG
BASE END
SETUP RS232 CD '2
F19: F20:
SET UP EQUIP FLAG TO INDICATE NUMBER OF PRINTERS AND RS232 CARDS
"OV "OV ROR OR "OV "OV [N
Nap
Nap
Nap
TEST
"NZ OR
AX,SI CL,3 AL,CL AL,BL BYTE PTR OX,201H AL,OX
; EQUIP FLAG"'I,AL
BASE END: SI HAS 2' NUMBER OF RS232 SHIFT COUNT ROTATE RIGHT 3 POSITIONS OR I N THE PR I NTER COUNT
; STORE AS SECOND BYTE
AL,OFH F20 BYTE PTR EQU I P_FLAG'" 1 , 16
NO_GAME_CARO NO_GAME_CARD:
;----- ENA8LE NMI INTERRUPTS
F21:
[N OR OUT ANa OUT "OV OUT
[NT
AL,PORT B AL,30H
PORT B,AL
AL,OCFH
PORT B,AL AL,80H OAOH,AL
RESET CHECK ENABLES
ENABLE NM I INTERRUPTS LOAD BOOT STRAP: GO TO THE-BOOT LOADER
PC-XT System BIOS (11/08/82) 5-125
LOC 08.JECT
E66F E66F FC E610 2BFF E612 2BCO E614 E614 8805 E616 8A05 E618 32C4 E61A 1540 E61C FEC4 E61E 8AC4 E680 75F2 E682 8809 E684 0lE3 E686 88AAAA E689 8A55FF E68C F3 E68D AB
E68E E46 I E690 OC30 E692 E661 E694 90 E695 24CF E691 E661 E699 E699 4F E69A FO
E69B E69B E690 E69F E69F E6AO E6A2 E6A4 E6A6 E6Al
8BFl 8BCB
AC 32C4 7525 8AC2 AA E2F6
E6A9 22E4 E6A8 1416 E6AD 8AEO E6AF 86F2 E6BI 22E4 E6B3 7504 E6B5 8AD4 E6B7 EBEO E6B9 E6B9 FC E6BA 41 E6BB 14DE E6BD 4F E6BE BAa 100 E6C I EB06 E6C3 E6C3 E462 E6C5 24CO E6C7 BOOO
E6C9 E6C9 FC E6CA C3
E6CB E6C8 E6CC E6CD E6CF
52 50 8COA 268836 I 500
E6D4 81FAOOC6 E608 7COO
E60A E6FOl8 E6DO BEOAF990
E6EI E6C512 E6E4 E6E4 58 E6E5 5A E6E6 C3 E6E7 E6E7 BA020 1 E6EA E8EB 12 E6ED EBF5
LINE SOURCE (8105 FOR THE IBM PERSONAL COMPUTER xn 11/08/82
1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1331 1338 1339 1340
THIS SUBROUTINE PERFORMS A READ/WRITE STORAGE TEST ON A BLOCK OF STORAGE.
ENTRY REQU I REMENTS: ES " ADDRESS OF STORAGE SEGMENT BEING TESTED OS '" ADDRESS OF STORAGE SEGMENT BE I NG TESTED CX WORD COUNT OF STORAGE BLOCK TO BE TESTED
EX I T PARAMETERS: ZERO FLAG = a I F STORAGE ERROR (DATA COMPARE OR PAR I TY CHECK. AL=O DENOTES A PARITY CHECK. ELSE AL=XOR'ED BIT PATTERN OF THE EXPECTED DATA PATTERN VS THE ACTUAL DATA READ.
AX.BX,CX,DX,DI, AND SI ARE ALL DESTROYED.
STGTST CNT - CLD
SUB SUB
""00''
XOR JNZ INC
"0'
JNZ MOV SHL MDV
"DV REP
PROC
NEAR
01.01 AX, AX
{DII,AL AL, [011 AL,AH C1 AH AL,AH
C2 I
BX:CX 8X,I AX,OAAAAH OX,OFF55H STOSW
SET 0 I R FLAG TO INCREMENT SET 0 I ",OFFSET 0 REL TO E5 REG SETUP FOR O->FF PATTERN TEST
ON FIRST BYTE
O.K. ? GO ERROR I F NOT
LOOP TILL WRAP THROUGH FF
SAVE WORD COUNT OF BLOCK TO TEST
; CONVERT TO A BYTE COUNT
; GET INITIAL DATA PATTERN TO WRITE
; SETUP OTHER OAT A PATTERNS TO USE
; FILL STORAGE LOCA T J ONS I N BLOCK
1341 1342 1343 1344 1345 1346 1347 1348 1349
C3:
IN OR OUT NOP
AND OUT
DEC STO
1350 C4:
1351
1352
1353 C5:
1354
LOOSB
1355
XOR
1356
JNE
1357
MDV
1358
STOSB
1359
LOOP
1360
1361
ANa
1362 1363 1364
JZ
"0'
XCHG
1365
AND
1366
JNZ
1367
"OV
1366
J"P
1369 C6:
1370
CLD
1371
INC
1372
JZ
1373
OEC
1374
MDV
1375
J"P
1376 C6X:
1377
IN
1318
AND
1379
MOV
1380 C7:
1381
CLD
1382
RET
1383 STGTST_CNT
1384
1385
1386
1381 ROM ERR PRoe
1368
-
PUSH
1389
PUSH
1390
MOV
1391 1392
"OV
1393
C"P
1394
JL
1395
CALL
1396
MOV
1397
CALL
1398 ROM ERR END:
1399
-
-POP
1400
POP
140 I
RET
1402 ROM ERR BEEP:
1403
-
-MOV
1404
CALL
1405
J"P
1406 ROM_ERR ENDP
1407
AL,PORT B
AL,OOIIOOOOB PORT_B,AL
AL,IIOOIIIIB
PORT_B,AL
01
SI,DI
ex ,ex
AL,AH C1 AL,DL
C5
AH,AH Cb> A.H,AL DH,DL AH,AH C6 DL ,AH C3
DI C. 01 DX,OOOOIH C3
AL,PORT C AL,OCOH AL,OOOH
ENOP
NEAR
OX AX
DX,DS ES ;MFG_ERR_FLAG. DH
DX,oe800H ROM ERR BEEP PRT-SEGS I ,OFFSET F3A E_MSG
AX
OX
DX,Ol02H ERR BEEP
SHORT ROM_ERR_ENO
, TOGGLE PARITY CHECK LATCHES
POINT TO LAST BYTE .JUST WRITTEN
SET OIR FLAG TO GO BACKWARDS
INITIALIZE DESTINATION POINTER
SETUP BYTE COUNT FOR LOOP
INNER TEST LOOP
READ OLD TEST BYTE FROM STG 1511+'
DATA READ AS EXPECTED 7
NO GO TO ERROR ROUT I NE
GET NEXT DATA PATTERN TO WRITE
WRITE INTO LOC JUST READ 1011+'
DECREMENT BYTE COUNT AND LOOP CX
ENDING ZERO PATTERN WRITTEN TO STG ?
YES RETURN TO CALLER WITH AL:::cO
SETUP NEW VALUE FOR COMPARE MOVE NEXT DATA PATTERN TO OL READING ZERO PATTERN THIS PASS? CONT I NUE TEST SEQUENCE TILL ZERO DATA ELSE SET ZERO FOR END READ PATTERN AND MAKE FINAL BACKWARDS PASS
SET 0 I R FLAG TO GO FORWARD SET POINTER TO BEG LOCATION READ/WRITE FORWARD IN STG AO.JUST PO INTER SETUP 0 I FOR PAR I TY B! T AND 00 FOR END READ/WRITE BACKWARD IN STG
DID A PARITY ERROR OCCUR 7 ZERO FLAG WI LL BE OFF PAR I TY ERROR AL=O DATA COMPARE OK
SET DIRECTION FLAG TO INC
SAVE PO INTER
GET ADDRESS POINTER
<> <> <><><> <> <> <> <> <> <> <> <> <> <>
<><><>CHECKPOINTS CO->F4<><><>
CRT CARD I N ERROR?
; GIVE CRT CARD FAIL BEEP
; PR I NT SEGEMENT J N ERROR
; DISPLAY ERROR MSG
BEEP I LONG, 2 SHORT
5-126 PC-XT System BIOS (11/08/82)
LOC OBJECT
EbF2 EbF2 EbF2 FB EbF3 2BCO EbF5 BEDS
E6F7 C70b7800C7EF E6FO 8COE7AOO
E70 I 890400 E104 E704 51 E705 8400 E101 COl3 E709 720F E708 B80 I 02 E70E 2802 E710 8EC2 E712 8B007C E715 B90100 E716 CDI3 E71A E71 A 59 E718 7304 E710 E2E5
E11F E71F CDI8
E721 E721 EA007COOOO
xn LINE SOURCE 1BIOS FOR THE IBt.4 PERSONAL COMPUTER
11/08/62
1408 1409 1410 141 I 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1426 1429 1430 1431 1432 1433 1434 1435 1436 1431 1438 1439 1440 1441 1442 1443 1444 1445 1446 1441 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460
INT 19 ;--~
--~~-~~----------------~---------~--
BOOT
STRAP LOADER
TRACK 0, SECTOR I I S READ [NTD THE BOOT LOCAT I ON (SEGMENT 0, OFFSET 1eoo) AND CONTROL IS TRANSFERRED THERE.
I F THERE I S A HARDWARE ERROR CONTROL IS TRANSFERRED TO THE ROt.4 814. SIC ENTRY PO I NT ·
ASSUt.4E CS: CODE. OS: ASSO
ORO
OE6F2H
BOOT STRAP - S1I
SUB MOV
PROC
AX ,AX OS,AX
NEAR
: ENA8LE INTERRUPTS ; ESTABLISH ADDRESSING
;----- RESET THE DISK PARAt.4ETER TABLE VECTOR
WORD PTR DISK POINTER, OFFSET DISK BASE
WORD PTR 0ISK=POINTER~2.CS
LOAD SYSTEt.4 F'ROt.4 0 I SKETTE
CX HAS RETRY COUNT
MOV
CX,4
: SET RETRY COUNT
; 1PL SYSTEt.4
PUSH
ex
: SAVE RETRY COUNT
MOV
AH,O
; RESET THE DISKETTE SYSTEt.4
INT
13H
Je
H2
; DISKETTE 10 ; IF ERROR-;- TRY AGA I N
NOV
AX,20lH
; READ 1N THE SINGLE SECTOR
SUB
OX,OX
; TO THE BOOT LOCATION
NOV
ES,OX
MOV
BX, OFFSET BOOT_LOCN
OR I VE 0, HEAD 0
MOV
CX,I
SECTOR I, TRACK 0
INT
13H
01 SKETTE_IO
H2:
POP
ex
RECOVER RETRY COUNT
JNe
H4
CF SET BY UNSUCCESSFUL READ
LOOP
HI
00 IT FOR RETRY Tlt.4ES
UNABLE TO 1PL FROM THE DISKETTE
H3:
INT
18H
----- ;
IPL WAS SUCCESSFUL
GO TO RESIDENT BASIC
H4: JMP
BOOT_STRAP
BOOT LOCN ENOP
PC-XT System BIOS (11/08/82) 5-127
LOC OBJECT
E729 E129 E729 1704 E12B 0003 E120 8001 E72F COOO E731 6000 E733 3000 E135 1800 E731 OCOO E739
E739 FB E73A IE E73B 52 E73C 56 E730 57 E73E 51 E73F 53 E740 8BF2 E142 8BFA E744 01E6 E746 E81013 E7 49 8B14 E14B OBD2 E74D 7413 E74F OAE4 E751 7416 £753 FECC E755 7445 E757 FECC E759 146,1. E758 E758 FECC E75D 7503 E7SF E98300 E762 E762 5B E163 59 E764 SF E765 5E E766 5,1. E767 IF E768 CF
146 ;
1462 1463 1464 1465 1466 1461 1468 1469
1470 1471 1472 1473 1414 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1491 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 151 I 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 15&5 1566 1567 1568 1569 1570 157 I 1572 1573 1574
SOURCE 18105 FOR THE IBt.4 PERSONAL COt.4PUTER XT) 11/08/82
;-----INT 14---------- RS232 10 -THIS ROUTINE PRO.... IDES BYTE STREAt.4 110 TO THE COt.4MUNICATIONS PORT ACCORD I NG TO THE PARAMETER S: IAHI=O INITIALIZE THE COMMUNICATIONS PORT (ALI HAS PARAMETERS FOR INITIALIZATION
6
BAUD RATE -
000
I 10
00 I
150
010 - 300
all - 600
100 - 1200
tal - 2400
1 10 - 4800
I I I - 9600
4
3
-PAR I TY-
XO - NONE
0'
ODD
I I - E.... EN
2
STOPBIT
o I
I- 2
I
0
--WORD LENGTH-
10 7 BITS
1 I
8 BITS
ON RETURN, CONDiTiONS SET AS IN CALL TO C0t.4t.40 STATUS (AH=3) I AH) "" 1 SEND THE CHARACTER IN i AL I O.... ER THE C0t.4t.40 LINE
(ALI REGISTER [S PRESER ....ED ON EX[T, BIT 7 OF AH IS SET [F THE ROUTINE WAS UNABLE
TO TRANSt.41 T THE BYTE OF DATA O....ER THE L [NE.
IF BIT 7 OF AH IS NOT SET. THE REMA[NDER OF AH
IS SET AS IN A STATUS REQUEST, REFLECTING THE
CURRENT STATUS OF THE LINE.
IAHI:::2 RECEIVE A CHARACTER IN (ALl FROt.4 COMMO LINE BEFORE RETURN [NG TO CALLER ON EX[T. AH HAS THE CURRENT LINE STATUS, AS SET BY THE THE STATUS ROUTINE, EXCEPT THAT THE ONLY BITS LEFT ON ARE THE ERROR BI TS I 1 ,4,3,2. 1 ) IF AH HAS BIT 7 ON (TIME OUTI THE REMA[N[NG
BITS ARE NOT PREDICTABLE.
THUS, AH I S NON ZERO ONLY WHEN AN ERROR
OCCURRED.
RETURN THE COt.4MO PORT STATUS [N (AXI AH CONTAINS THE LINE STATUS 81T 1 Tlt.4E OUT BIT 6 = TRANS SH' FT REG IS TER EMPTY BIT 5 " TRAN HOLDING REGISTER Et.4PTY BIT 4 = BREAK DETECT BIT 3 = FRAMING ERROR BIT 2 = PAR[TY ERROR 8' T 1 ::: O....ERRUN ERROR BIT 0 " OATA READY AL CONTAINS THE t.40DEt.4 STATUS
= BIT 7 " RECE ' .... ED LI NE SIGNAL DETECT
BIT 6 RING [NDICATOR BIT 5 '" DATA St:T READY BIT 4 '" CLEAR TO SEND B[T 3 ::: DELTA RECEIVE LINE SIGNAL DETECT B[T 2 ::: TRAILING EDGE RING DETECTOR BIT I = DELTA DATA SET READY BIT 0 = DELTA CLEAR TO SEND
(OX) = PARAMETER INDICATING WHICH RS232 CARD (0, I ALLOWED)
DATA AREA RS232 BASE CONTA[NS THE BASE ADDRESS OF THE 8250 ON THE
CARD LOCATION 400H CONTAINS UP TO 4 RS232 ADDRESSES POSSIBLE
0,1. T A AREA LABEL RS232 T I t.4 OUT (BYTE I CONT A I NS OUTER LOOP COUNT
VALUE FOR T[MEOUT \DEFAULT",,)
OUTPUT
AX t.40DIFIED ACCORDING TO PARt.4S OF CALL
----- ALL OTHERS UNCHANGED
;
ASSUt.4E CS:CODE,DS:DATA
ORG
OE729H
LABEL
ow ow ow ow ow ow ow
WORD
.1047
768 384 192
46 24
T ABLE OF I NIT .... ALUES
110 BAUD
150
300
600
1200
2400
4800
DW
12
9600
RS232 10
PROC
FAR
VECTOR TO APPROPR I ATE ROUT I NE
STI
PUSH
OS
PUSH
ox
PUSH
51
PUSH
01
PUSH
CX
PUSH
BX
MOV
SI,OX
MOV
DI,DX
SHL
SI, I
CALL
ODS
MOV
DX,RS232_BASE(SI)
OR
DX,DX
"OR'
A3 AH,AH
"'DEC
A4 AH
"'DEC
A5 AH
,1.2:
"'
Al2
D"NEC,
AH A3
JMP
A3 :
POP
BX
POP
ex
POP
01
POP
SI
POP
ox
POP
OS
IRET
, NTERRUPTS 8ACK ON SAVE SEGMENT
RS232 VALUE TO 5 I WORD OFFSET
GET BASE ADDRESS TEST FOR 0 BASE ADDRESS RETURN TEST FOR IAHI =0 COMMUN IN[ T TEST FOR {AHI::: I SEND AL TEST FOR (AHI =2 RECE [VE INTO AL TEST FOR (AH) =3 COMMUNICATION STATUS RETURN FROt.4 RS23Z
RETURN TO CALLER. NO ACTION
5-128 PC-XT System BIOS (11/08/82)
LOC 08.JECT
E769 E769 8AEO E768 83C203 E76E 8080 E770 EE
E771 8A04 E173 8104 E775 02C2 E777 81E20EOO E778 8F29E7 E77E 03FA E780 8814 E782 42 E783 2E8A450 1 E787 EE E788 4A E789 2E8A05 E78C EE E780 83C203 E790 8AC4 E792 241F E794 EE E795 4A E796 4A E797 8000 E799 EE E79A E849
EHC E79C 50 E790 83C204 E7AO 8003 E7A2 EE E7A3 42 E7A4 42 E7A5 8730 E7A7 E84800 E1AA 7408 E7AC E7AC 59 E7AO 8ACI E7AF E7AF 80CCeo E782 E8AE E784 E784 4A E785 E7B5 8720 E7B7 E83800 E7BA 75FO E7BC E78C 83EA05 E78F 59 E7CO 8AC I E7C2 EE E7C3 E890
E7C5 E7C5 83C204 E7C8 800 1 E7CA EE E7C8 42 E7CC 42 E7CO E7CO 8720 E7CF E82000 E702 7508 E704 E704 4A E705 E705 B701 E707 E81800 E70A 7503 EmC E10C 80£41E EmF 8814 E7EI EC E7E2 E91DFF
E7E5 E7E5 8BI4 E7E7 83C205 E7EA EC E7EB 8AEO E1ED 42 E7EE EC E7EF E970FF
liNE SOURCE 1810S FOR THE IBM PERSONAL COMPUTER XT) I I 108182
----- 1575 ;
INITIALIZE THE COMMUNICATIONS PORT
1576
1577 A4:
1578 1579 1580
MOV AOO MOV
AH,AL DX,3 AL,80H
SAVE INIT PARMS IN AH PO I NT TO 15250 CONTROL REG IS TER
1581 1582
OUT
OX,AL
SET DlA8= I
'583 ;----- DETERMINE 8AUO RATE DIVISOR 1584
1585 1586 1587 1588 , 589
1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609
MOV MOV ROL ANa MOV
AOO MOV INC MOV
OUT OEC MOV
OUT AOO MOV ANa OUT OEC OEC MOV
OUT "MP
DL,AH
CL,4
DL,CL
OX,OEH
01 ,OFFSET A'
OI,OX
OX,RS232 8ASE[S'1
ox
AL,CS:(OII+1 OX.Al
ox
Al,SC: [011 OX,Al OX,3
AL,AH Al,OIFH DX,AL
ox ox
AL,O OX,AL SHORT AI8
GET P ARMS TO OL
I SOLATE THEM 8ASE OF TABLE PUT INTO INDEX REGISTER POINT TO HIGH ORDER OF DIVISOR
GET HIGH ORDER OF DIVISOR SET MS OF 0 J V TO 0
GET LOW ORDER OF 0 [V, SOR SET LOW OF 0 I V I SOR
GET PARMS BACK STRIP OFF THE BAUD 81TS LINE CONTROL TO 8 BITS
I NTERRUPT ENABLES ALL OFF COM_STATUS
;----- SEND CHARACTER I N I AL) OVER COMMa LINE
1610 AS:
161 I 1612 1613 1614 1615 1616
PUSH AOO MOV
OUT INC INC
AX DX,4 AL,3 DX,AL OX OX
SAVE CHAR TO SEND MODEM CONTROL REG I STER DTR AND RTS
DATA TERMINAL READY, REQUEST TO MODEM STATUS REGISTER
1617 1618 1619 1620 A7;
MOV CALL
"E
BH,30H
WA I T FOR STATUS
A9 -
DATA SET READY & CLEAR TO SEND ARE 80TH TRUE YES. READY TO TRANSMIT CHAR
1621
pOP
CX
1622 1623 A8;
MOV
AL,CL
RELOAD DATA 8YTE
1624 1625
1626 1627 1628 1629 1630 163 I 1632 1633 1634 1635 1636
1637 1638
A9: A 10:
A I I:
OR "MP
OEC
MOV CALL
"N'
SUB POP MOV OUT "MP
AH,80H A3
OX
8H,20H
WA [T FOR STATUS
A7 -
OX,5 CX AL,Cl DX.Al A3
INDICATE TIME OUT
RETURN CLEAR TO SEND LINE STATUS REGISTER WA[T SEND
IS TRANSMITTER READY TEST FOR TRANSM I TTER READY RETURN WITH T [ME OUT SET OUT CHAR DATA PORT RECOVER I N ex TEMPORAR I L Y MOVE CHAR TO AL FOR OUT, STATUS OUTPUT CHARACTER RETURN
, 639 ;----- RECEIVE CHARACTER FROM COMMa LINE
1640
1641 A12:
1642 1643 1644
1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662
A'3:
A15: A16:
A17:
ADD MDV OUT INC INC
MOV CALL .JNZ
DEC
MOV CALL .JNZ
AND MOV IN .JMP
DX,4 AL,I DX,AL OX
ox
8H,20H WAIT FOR STATUS A8
ox
BH,I WAIT FOR STATUS A8
AH,OOOllll08 DX,RS232BASE(Stl AL,DXA3
MODEM CONTROL REGI STER DA T A TERM I NAL READY
MODEM STATUS REGISTER
WAIT DSR DATA-SET READY TEST FOR DSR RETURN WITH ERROR WAIT OSR END LINE-STATUS REGISTER WAIT RECV RECETvE BUFFER FULL TEST FOR REC. BUFF. FULL SET T I t.4E OUT ERROR GET CHAR TEST FOR ERR COND I T IONS ON RECV DATA PORT GET CHARACTER FROt.4 liNE RETURN
1663 1664
-- COMMO PORT STATUS ROUTINE
1665 A18:
1666 1667 1668 1669 1670 167 I 1672
MOV ADD IN MOV INC IN "MP
DX,RS232 8ASE[SI)
ox,S -
AL,DX AH,AL OX
.3AL,DX
CONTROL PORT GET L [NE CONTROL STATUS PUT IN AH FOR RETURN POINT TO MOOEM STATUS REGISTER GET MODEM CONTROL STATUS RETURN
SEND CHAR
PC-XT System BIOS (11/08/82) 5-129
LOC OBJECT
E1F2 E1F2 6A501C E1F5 E1F5 28C9 E1F7 E7F7 EC E7F'B BAED E7FA 22C7 E7FC 3AC1 E1F'E HOB E600 E2F5 E802 FEC8 E604 75EF
E806 OAFF' E808 E808 c3
E809 4552524F522E20 28524553554045 20302022463122 2048455929
E623 00 E624 OA
LINE
1613 ! 674 1675 1616 1677 1618 1679 1680 1681 1682 1683 1684 1685 1686 1681 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1100 1101 1102 1703 1704
SOURCE ~810S FOR THE IBM PERSONAL eOhiPUTER XT) 11/08/82
; -------- ---- ---------- -- ------- --
WAIT FOR STATUS ROUTINE
ENTRY:
BH=:STATUS BIT IS) TO LOOK FOR,
OX=:AOOR. OF STATUS REG
= EX I T: ZERO FLAG ON
STATUS FOUND
ZERO FLAG OFF' = TIMEOUT.
AH:LAST STATUS READ
~~ ~~ -;~~-~~~ ~~~ -;~~~----~~~~ - -
-
MO....
BL,RS232 T","_OUT[O! 1
IFSO:
WFS I:
SUB
cX,ex
IN
AL,OX
MOV
AH,AL
AND
AL.BH
CMP
AL,BH
JE
WFS END
LOOP
IFsT
DEC JNZ
BL WFSO
LOAD OUTER LOOP COUNT
GET STATUS MOVE TO AH I SOLATE BITS TO TEST EXACTLY = TO MASK RETURN WITH ZERO FLAG ON TRY AGAIN
OR
BH,BH
IFS END:
-
RET
WAIT FOR STATUS ENOP
RS232_'O
ENOP
F3D
DB
'ERROR.
= (RESUME Fl
stT ZERO FLAG OFF
KEY)',13,10
ERROR PROMPT
1705
5-130 PC-XT System BIOS (11/08/82)
LOC 08JECT
E82E E82E E82E F8 E82F IE E830 53 E831 E82512 E834 OAE4 E83b 140A E838 FECC E83A 741E E83C FECC E83E 1428 E840 E82C
E842 E842 F8 E843 90 E844 FA E845 881 E I AOO E849 381EICOO E84D 14F3 E84F 8807 E851 E8IDOO E854 891EIAOO E858 E814
E85A E85A FA E858881EIAOO E85F 381EICOO E8b3 8801 E8bS F8 E8bb 58 E8bl IF E8b8 CA0200
E8b8 E8bS AO 1700 E8bE E8bE 58 EMF IF E870 CF
E811 E871 43 E872 43 E813 381E8200 E8H 1504 E819 881 E8000 E81D E810 C3
E87E E81E 52 E87F 3A E880 45 E881 4b E882 38 E883 10 E884 2A E88S 36
0008
E886 E886 80 E887 40 E888 20 E889 10 E88A 08 E888 04 ES8C 02 E88D 0'
E88E 18 E88F FF E890 00 E891 FF E892 FF E893 FF E894 IE
LINE SOURCE IBIOS FOR THE IBM PERSONAL COMPUTER Xl) 11/08/82
1706 1i01 1708 1i09 17 I 0 1711 1712 1713 1114 1715 1116 1117 1118 1119 1120 1121 1122 1123 1724 1125 1126 1721 , 128
1729 1730 1731 1732 1133 1734 1735 1736 1737 1738 1739 1740 1141 1142 1743 1144 1145 1746 1747 1148 1149 1750 1151 1752 1153 1154 1155 1756 1751 1758 1759 1160 1161 1162 1163 1164
1765 1766 1761 1168 1769 1710 1771 1712 1173 1174 IH5 IH6 Ill7 Ill8 lH9 1180 1781 1782 1783 1784 1185 178b 1181 1788 t 189 1190 1191 1192
; -- - - I NT 16 -------- -- -- - - - -- - -------- -- - - - - ------ -- - - - ------------ - --
; KEY80ARD [/0
;
THESE ROUT I NES PROV I DE KEY80ARD SUPPORT
; INPUT
(AH) =0 READ THE NEXT ASC!! CHARACTER STRUCK FROM THE KEY80ARD
;
RETURN THE RESULT I N I AL), SCAN CODE I N I AH)
= (AH) 1 SET THE Z FLAG TO INDICATE IF AN ASCII CHARACTER IS
;
AVAILA8LE TO 8E READ.
(ZF)=I -- NO CODE AVAILA8LE
(ZF)",O -- CODE IS AVAILA8LE
;
IF ZF '" 0, THE NEXT CHARACTER IN THE 8UFFER TO 8E READ
IS IN AX, AND THE ENTRY REMAINS IN THE BUFFER
IAH) =2 RETURN THE CURRENT SHIFT STATus [N AL REG[STER
THE BIT SETTINGS FOR THIS CODE ARE INDICATED IN THE
OUTPUT
THE EQUATES FOR K8_FLAG
AS NOTED ABOVE. ONLY AX AND FLAGS CHANGED
I ;
-
-
-
-
-
-
-
ALL
---
-
REG
---
I
-
STER
--- -
S
-
-
P-R- E-S-E-R-V-E-D--
-
-
--
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ASSUME CS:COOE,DS:DATA
ORG
OEB2EH
KEY80ARD [0
PROC
FAR
STI
[NTERRUPTS 8ACK ON
PUSH PUSH CALL
DS BX DDS
SAVE CURRENT OS
SAVE ex TEMPORARILY
OR
AH,AH
ez
01
AH=O ASC I I READ
DEC
AH
ez
02
DEC
AH
ez
03
eMP
SHORT
AH= I -
ASCII STATUS AH=2 -
SHIFT STATUS EXI T -
READ THE KEY TO FIGURE OUT WHAT TO DO
K I:
STI Nap
eLI MOV
eMP
ez
MOV CALL MOV
eMP
8X, BUFFER HEAD
8X.BUFFER-TAIL
01
AX, [BX) 04
8UFFER HEAD,BX SHORT INTIO_END
----- ;
ASC I I STATUS
ASC I I READ I NTERRUPTS BACK ON OUR I NG LOOP ALLOW AN I NTERRUPT TO OCCUR INTERRUPTS 8ACK OFF GET PO I NTER TO HEAO OF BUFFER TEST END OF BUFFER LOOP UNT I L SOMETH I NG IN 8UFFER GET SCAN CODE AND ASC J I CODE MOVE POINTER TO NEXT POSITION STORE VALUE IN VARIABLE RETURN
K2:
CLI
MOV
8X, BUFFER HEAD
CMP
BX,BUFFER-TAIL
MOV
AX,(BX)
STI
POP
BX
POP
OS
RET
2
I NTERRUPTS OFF GET HEAD POINTER IF EQUAL IZ=I) THEN NOTH[NG THERE
I NTERRUPTS BACK ON RECOVER REG I STER RECOVER SEGMENT THROW AWAY FLAGS
SHIFT STATUS
K3:
MOV
[NTIO END:
- pap
POP [RET KEY80ARD_ [0
BX OS
ENDP
; ----- I NCREMENT A BUFFER PO INTER
; GET THE SHIFT STATUS FLAGS
RECOVER REG I STER , RECOVER REG I STERS : RETURN TO CALLER
K4
PROC
NEAR
INC
BX
INC
BX
CMP
BX,8UFFER END
JNE
OS
MOV
BX. BUFFER_START
K5:
RET
K4
ENDP
MOVE TO NEXT WORD IN LIST
AT END OF BUFFER? NO, CONTINUE YES, RESET TO 8UFFER BEGINNING
;----- TABLE OF SHIFT KEYS AND MASK VALUES
LABEL DB DB
BYTE
[NS KEY
I I NSERT KEY
CAPS_KEY. NUM_KEY · SCROLL_KEY, AL T_KEY, CTL_KEY
1193
1794
1195 119b 1191 1198 1799 1800
K6L ;--07
08
LEFT_KEY,RIGHT_KEY
EQU
I-Kb
SH! FT_ MASK_TABLE
LABEL 08 DB
BYTE
INS SHIFT
; INSERT MODE SHIFT
CAPS_SH I FT ,NUM_SH [FT. SCROLL_SH 1FT. AL T _ SH 1FT ,CTL_SH I FT
180 I
1802 1803 1804 1805 KB
08
LEFT_SHIFT,R[GHT_SHIFT
SCAN CODE TABLES
DB
21,-1,0,-1,-1,-1,30,-1
PC-XT System BIOS (11/08/82) 5-131
LOC OBJECT
E695 FF E69& FF EB97 FF EB9B FF EB99 IF E89A FF E898 7F E89C FF E89D I I E89E 17 E89F 05 E8AO 12 E8Al 14 E8A2 19 E8A3 15 E8A4 09 E8A5 OF E8A6 10 E8A1 18 E8A8 10 EBA9 OA EBAA FF E8A8 0 I E8AC t 3 E8AD 04 E8AE 06 E8AF 07 E880 08 E881 OA EBB2 OB E6B3 OC EBB4 FF E885 FF E886 FF E881 FF E88B lC E889 1A E88A 18 E888 03 E88C 16 E88D 02 E88E OE E8BF 00 E8CO FF E8C I FF E8C2 FF E8C3 FF E6C4 FF EBC5 FF E8C6 20 E8C7 FF
E8C8 E8C8 5E EBC9 5F E8CA 60 E8C8 6 I E8CC 62 E8CO 63 E8CE 64 E8CF 65 E800 66 E801 61 E802 FF E8D3 FF E8D4 11 E805 FF E806 84 E807 FF E8D8 73 E8D9 FF E8DA 74 E8D8 FF E8DC 75 E800 FF E8DE 16 E80F FF E8EO FF
E6EI E8EI lB E8E2 31323334353637
3839302030 E8EE 06 E8EF 09 E8FO 71116572141975
696F105850 E6FC 00 E8FD FF E8FE 6113646&67&8&A
6B6C38 E908 21 E909 60 E90A FF E90B 5C E90C 7A18637&626E6D
2C2E2F E916 FF E911 2A E916 FF E919 20 E91A FF
E918 E918 18 E91C 21402324 E920 25 E921 5E E922 262A28295F2B E928 08 E929 00 E92A 51514552545955
494F50787D E936 00 E931 FF E938 4153444641484A
LINE SOURCE IBI05 FOR THE IBM PERSONAL COMPli~~R XTI 11/08/82
1806
DB
-1,-1,-1,31,-1,121,-1,11
1807
08
23,5,18,20,25,21,9,15
IB08 1809
08
16,27,29,10,-1,1,19
DB
4,6,7,8;10,11,12.-1,-1
1810
DB
-1,-1,28,26,24,3,22,2
DB
14,13,-1,-1,-1,-1,-1,-1
1812
D B ' '.-1
1813 1814 1815
i----- CTL TA8LE SCAN
K9
LABEL BYTE
DB
94,95,96,91,98,99,100,101
1816
08
102,103,-1,-1,119,-1,132,-1
1817
DB
115,-1,116,-1,117,-1,118,-1
1818 1819 1820 1821
DB
i----- LC TABLE
K I 0
LABEL 8YTE
DB
0IBH,'1234567890-:',08H,09H
1822
08
'q..,ertyufop[]',OOH,-I.'.sdfgnJkli',021H
1823
60H,-1,5CH,'z~cvbnm,.I',-I,'.'.-I,' ·
1824 1825 1826
1827
08-1
; ----- UC TABLE
K 11
LABEL BYTE
DB
21,' !".&',31,05EH,'&·II_,' ,08H,O
1828
08
'QWERTYUIOP{} ',OOH,-I ,'ASDFGHJKL:"'
5-132 PC-XT System BIOS (11/08/82)
LOC OBJECT
4B4C3A22 E943 1E E944 FF E945 1C5A584356424E
403C3E3F E950 FF E951 00 E952 FF E953 20 E954 FF
E955 E955 54 E956 55 E951 56 E958 51 E959 58 E95A 59 E95B 5A E95C 5B E95D 5C E95E 50
E95F E95F 68 E960 69 E961 6A E9b2 6B E963 6C E964 60 E965 6E E966 6F
l' E961 10
E968
E969 E9b9 31383920343536
2B3' 3233302E
E916 E916 41 E911 48 E918 49 E919 FF E91A 4B E91B FF E91C 40 E91D FF E91E 4F E91F 50 E980 5 \ E981 52 E982 53
E981 E981 E981 FB E988 50 E989 53 E98A 51 E98B 52 E98C 56 E98D 51 E98E \ E E98F 06 E990 FC Eg91 E8C5 10 E994 E460 Egg6 50 E991 E461 E999 8AEO E99B OC80 E99D E661 Eg9F 86EO E9AI E661 EgA3 58 E9A4 8AEO
E9A6 3CFF E9A8 1503 E9AA E91 A02
E9AD EgAD 241F E9AF OE E9BO 01 EgBI BF1EE8 EgB4 B90800 E9B1 F2 E9B8 AE E9B9 8AC4 E9BB 1403 E9BD E98500
E9CO 81EF1FE8 E9C4 2E8AA586E8 E9C9 A880 E9CB 1551
E9CD 80FC I 0 E9DO 1301
E9D2 08261100 E9D6 E98000
LINE SOURCE (BIOS FOR THE 1BM PERSONAL COMPUTER XT I 1 1 108/82
1829
DB
Q7EH,-I, 'I ZXCVBNM<>?' ,-1,0,-1,' · ,-I
1830 1831 1832
;----- ue TABLE SCAN
KI2
LABEL BYTE
DB
84,85,86,81,88,89,90
1833
,- 1834
1835 KI3 1836
DB
9' ,92,93
AL T TABLE SCAN LABEL BYTE DB
104,105,106,101,108
1837
DB
109. 1 10, 1 1 1 , 1 12, 1 13
1838 1839
~~~---
NUM STATE TABLE LABEL BYTE
1840
DB
1841 1842 1843
~~~---
BASE CASE TABLE LABEL BYTE
DB
'189-456+1230, 71,12,13, -1,15, -1,77
1844
DB
-1,19,80,81,82.83
1845 1846 1847 1848 1849 1850 i 85 I 1852 1853 1854 1855 1856 1851 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1814 1875 1816 1811 1878 1879 1880 1881 1882 1883 1884 1885 1886
1881 1888 1889 1890 189 I 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906
- - - - KEYBOARD [NTERRUPT ROUT I NE
KB_1NT
ORG PROC
STi PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH eLD CALL IN PUSH IN "OV OR
OUT XCHG OUT POP
"OV
OE981H FAR
AX BX
ex
OX
SI 01
OS ES
DDS
AL.KB OAT ....
AX
....L,KB CTL AH,AL AL,80H
KB CTL,AL
AH-;-AL
KB CTL,AL AX-
AH,AL
ALLOW FURTHER INTERRUPTS
FORWARD 0 I RECT 1ON READ I N THE CHARACTER SAVE IT GET THE CONTROL POR T SAVE VALUE RESET BI T FOR KEYBOARD ; GET BACK ORIGINAL CONTROL ; KB HAS BEEN RESET ; RECovER SCAN CODE ; S.... VE SCAN CODE IN AH ALSO
;----- TEST FOR OVERRUN SCAN CODE FROM KEYBOARD
e"p
JNZ
J"P
AL,OFFH ">6 K62
; IS TH I S AN OVERRUN CHAR I NO, TEST FOR SHIFT KEY ; BUFFER_FULL_BEEP
;----- TEST FOR SHIFT KEYS
K16:
AND
PUSH POP
"OV "OV REPNE
AL,07FH
es
ES 01 ,OFFSET K6 CX,K6L
SCASB
TEST SHIFT TURN-OFF THE BREAK BI T
ESTABL I SH ADDRESS OF SHIFT TABLE SHIFT KEY TABLE LENGTH LOOK THROUGH THE TABLE FOR A MATCH
"OV
AL,AH
"E
KJ1
J"P
K2S
SH I FT KEY FOUND
RECOVER SCAN CODE JUMP 1F MA TCH FOUND I F NO MATCH, THEN SH I FT NOT FOUND
K 11:
SUB MOV TEST
"NZ
01 ,OFFSET K6+1 AH,CS:K1(OI] AL,80H K23
ADJUST PTR TO SCAN CODE MTCH GET MASK 1NTO AH
, TEST FOR BREAK KEY I BREAK _ SH I FT _FOUND
SHIFT MAKE FOUND, DETERMINE SET OR TOGGLE
CMP JAE
AH, SCROLL SH I FT
K18
-
IF SCROLL SHIFT OR ABOVE, TOGGLE KEY
PLAIN SHIFT KEY, SET SHIFT ON
OR JMP
KB FLAG, AH K26
TURN ON SHIFT BIT INTERRUPT_RETURN
PC-XT System BIOS (11/08/82) 5-133
lOC OB.JECT
E9D9 E9D9 F606110004 E9DE 7565 E9EO 3C52 E9E2 1522 E9E4 F606110008 E9E9 755A E9E8 F6Q6170020 E9FO 7500 E9F2 F606110003 E9F1 7400
E9F9 E9F9 883052 E9FC E9D60 1 £9FF E9FF F6061T0003 EA04 HF3
EA06 EA06 84261800 EAOA 7540 EAOC 08261800 EAIO 30261700 EAI4 3C52 EAI67541 EA 18 880052 EA18 E98101
EA IE EAtE 80FCI0 EA21 73tA EA23 F6D4 EA25 20261100 EA29 3CB8 EA28 152C
EA2D A01900 EA30 8400 EA32 88261900 EA36 3COO EA38 741F EA3A E9Al01 EA3D EA3D F6D4 EA3F 20261800 EA43 E814
EA45 EA45 3C80 EA41 1310 EA49 F606180008 EA4E 7411 EA50 3C45 EA52 1405 EA54 8026t800Fl EA59 EA59 FA EA5A 8020 EA5C E620 EA5E EA5E 01 EA5F 1F EA60 5F EA61 5E EA62 5A EA63 59 EA64 58 EM5 58 EA66 CF
EA61 EA61 F606110008 EA6C 1503 EA6E E99100
EAll
EAll EA16
EA18 EA1A
F606170004 7433
3C53 152F
EA1C C10612003412 EA82 EA58EOOOFO
EA81 EA81 52 EA88 4F EA89 50 EA8A 51 EA8B 4B EA8C 4C EA8D 40 EA8E -41 EA8F -48 EA90 49
EA91 10 EA92 11
LINE SOURCE (BIOS FOR THE [BM PERSONAL COMPUTER Xl) 11/08182
1907 1908 1909
1910 1911
1912 1913 1914
1915 1916 1917
1918 1919
1920 1921
1922 1923 1924
1925
1926 1921 1928 1929 1930 1931 1932
1933 1934 1935 1936 1937
1938 1939 1940 1941
1942 1943
19-44 1945 1946
1941 m~ 1950 1951 1952 1953
1954 1955 1956 1951 1958
1959 1960 1961 1962 1963 1964 1965 1966 1961
1968 1969
1910 1911 1972
1973 1914-
1975 1916 19TT 1918 1919 1980
1981 1982 1983 1984 1985 1986 1981 1988
1989 1990
1991 1992 1993
1994 1995 1996 1991 1998 1999
2000 200 I 2002
2003 2004 2005 2006 2001 2008 2009 2010
:----- TOGGLED SHIFT KEY, TEST FOR 1ST MAKE OR NOT
K 18: K 19:
TEST JNZ eM. JNZ TEST JNZ TEST JNZ TEST JZ
~~5FlAG. CTl_SHIFT
SHIFT-TOGGLE
S~~~K I;T~T~H~~!T~TATE
Al, I NS KEY
K22
-
K8 FLAG, AL T SHIFT
K25
~~{lAG, NUM_STATE
CHECK FOR I NSERT KEY -.JUMP IF NOT INSERT KEY
CHECK FOR ALTERNATE SHIFT .JUMP IF ALTERNATE SHIFT
: S~~~K 1~0~u~AC6c~T~~E ON
K8 FLAG, lEFT SHIFT+ RIGHT SHIFT
K22
-
I JUMP IF BASE STATE
K20: K21 :
MOV JM.
TEST JZ
I NUMER I C ZERO, NOT I NSERT KEY
AX, 5230H
; PUT OUT AN ASC[] ZERO
K51
; BUFFER FILL
; MIGHT BE NUMER]C
KB FLAG, LEFT SHIFT+ R]GHT SH]FT
K20
-
JUMP NUMER I C, NOT ] NSERT
K22:
TEST JNZ OR XOR eM. JNE MOV JM.
AH,KB FLAG I
K26 -
K8 FLAG I,AH KB-FlAG:AH
AL:INS KEY
K26
AX,INS KEY-256 K51
SHIFT TOGGLE KEY H]T; PROCESS ]T I S KEY ALREADY DEPRESSED .JUMP I F KEY ALREADY DEPRESSED
INDICATE THAT THE KEY I S DEPRESSED TOGGLE THE SHIFT STATE TES T FOR 1ST MAKE OF I NSERT KEY .JUMP I F NOT I NSERT KEY SET SCAN CODE INTO AH, 0 INTO Al PUT I NTO OUTPUT BUFFER
:----- 8REAK SHIFT FOUNO
K23;
eM. JAE NOT ANa eMP
JNE
AH,SCROlL SHIFT
K24
-
AH
KB FLAG, AH
AL-;-ALT KEY+80H K26
8REAK-SH 1FT-FOUND IS THIS A TOGGLE KEY YES, HANDLE BREAK TOGGLE 1NVERT MASK TURN OFF SHIFT 81T IS THIS ALTERNATE SHIFT RELEASE INTERRUPT_RETURN
---- ALTERNATE SHIFT KEY RELEASED, GET THE VALUE INTO BUFFER
K24:
MOV "OV MOV eMP JE JMP
NOT ANa JMP
- AL,AlT INPUT
AH,O
AU_INPUT .AH
AL,O K26 K58
AH KB FLAG j, AH SHORT K26
SCAN CODE OF 0 ZERO OUT THE F I ElO WAS THE INPUT=O I NTERRUPT RETURN
1T WASN'T: SO PUT IN 8UFFER 8REAK-TOGGLE I NVERT MASK INOICATE NO lONGER DEPRESSED INTERRUPT_RETURN
;----- TEST FOR HOLD STATE
K25~
K26: K27 :
eMP JAE TEST JZ eM. JE ANa
eLi MOV OUT
.OP
.0..OP
PO.
.OP
.0.POP
PO.
IRET
Al,80H K26 ~~8FlAG 1 ,HOLD_STATE
Al,NUM KEY
~~~FlA~_1 ,NOT HOLD STATE;
Al,EOI 020H, AL
ES
05
01
51
ox
ex
8X
AX
;
I
I
NO-SH I FT-FOUNO TEST FOR BREAK KEY NOTH I NG FOR BREAK CHARS FROM HERE ON ARE WE IN HOLD STATE BRANCH AROUND TEST I F NOT
CAN'T END HOLD ON NUM LOCK ; TURN OFF THE HOLD STATE BIT
! NTERRUPT-RETURN TURN OFF INTERRUPTS END OF I NTERRUPT COMMAND SEND COMMAND TO 1NT CONTROL PORT 1NTERRUPT-RETURN-NO-EO 1
RESTORE STATE RETURN, [NTERRUPTS BACK ON
WITH FLAG CHANGE
NOT IN HOLD STATE, TEST FOR SPECIAL CHARS
K28:
TEST JNZ JMP
KB FlAG,AlT SHIFT
K29
. .8
; NO-HOlD- ST ATE ; ARE WE IN ALTERNATE SHIFT ; .JUMP IF ALTERNATE SH I FT ; .JUMP I F NOT ALTERNATE
;----- TEST FOR RESET KEY SEQUENCE ICTl AlT DEll
K29:
TEST JZ eM. JNE
KB FlAG,CTL SHIFT
K3T
-
Al,DEl KEY
K31
TEST-RESET , ARE WE I N CONTROL SH I FT ALSO : NO RESET ; SHTFT STATE IS THERE, TEST KEY ; NO_RESET
:- --- CTl-AlT-DEL HAS BEEN FOUND, DO I/O CLEANUP
MOV .JMP
RESET FLAG, 1234H RESET
;----- AlT-INPUT-TA8lE
K30
lABEL BYTE
08
82,19,80,81,15,16,11
: SET FLAG FOR RESET FUNCTION ; .JUMP TO POWER ON DIAGNOSTICS
20 I I
2012 ;2013
DB
11,12,13
10 NUMBERS ON KEYPAD
SUPER-SH I FT-T ABLE
DB
16,17,18,19,20,21,22,23
A-Z TYPEWRITER CHARS
5-134 PC-XT System BIOS (11/08/82)
~
~
LaC OBJECT
EA93 '2
" EA94
EA95 14
EA96 15
EA91 1b
EA98 17
EA99 18
EA9A
EA98 I"E
EA9C IF
EA9D 20
EA9E 21
EA9F 22
EAAO 23
EAA! 24 EAA2 25
EAA3 26
EAA4 2C
EAA5 20
EAAI!:> 2E
EAA 7 2F
EAA8 30
EAA9 31 EAAA 32
EAAB EAAB EAAD EAAF EABI
3C39 1505 B020 E921 0 1
EA84 EA84 8F87EA EA87 890AOO EABA F2 EABB AE
EABC 75 I 2
EABE 81EF88EA EAC2 AO I 900 EAC5 B40A EAC1 F6E4 EAC9 03C1 EACB A21900 EACE E889
EADO EADO EAD5 EAD8 EAD9 EADA EADC EADE
C606190000 B91AOO F2 AE
1505 BOOO E9F400
EAEI EAEI EAE3
EAE5 EAE7
EAE9 EAEC EAEE
3C02 720C
3COE 7308
80C471!:> BOOO E9E400
EAFI EAFI EAF3 EAF5 EAF5 EAF8 EAF8 EAFA EAFC EAFF
3C3B 7303
E91!:> IFF
3C47 73F9 BB5FE9 E91 BO 1
E802 EB02 F606110004 EB01 1458
/"'""'\
EB09 3C41!:>
E808 7518 E80D 8BIE8000 EBI I 891EIAOO EBI5 891EICOO E819 C606110080 EBIE COIB E820 2BCO E822 E9BOOO EB25 EB25 3C45 EB27 7521 EB29 BOOE 180008 EB2E B020 E830 E620
EB32 EB31 EB39 E83C EB3F
803E490007 1407 BA0803 A06500 EE
LINE SOURCE tBIOS FOR THE [BM PERSONAL COMPUTER HI 11/08/82
2014
DB
24,25,30,31,32,33,34,35
20 I 5
DB
20 I 6
DB
49,50
2017 2018 2019 2020 2021 2022 2023 2024 2025 20 2 I!:> 2027 2028 2029 2030 2031
IN ALTERNATE SH I FT, RESET NOT FOUND
K31 ;
CNP .;NE
MOV JIM"
AL,S7 K32 AL," KS7
NO-RESET TEST FOR SPACE NOT THERE SET SPACE CHAR BUFFER_F I LL
KEY
i ----- LOOK FOR KEY PAD ENTRY
K32:
NOV NOV REPNE
01 ,OFFSET K30 CX,IO SCAS8
ALT-KEY-PAD ALT-iNPUT-TABLE LOOK FOR ENTRY US I NG LOOK FOR MATCH
KEYPAD
2032 2033 2034 2035 2036 2031
2038 2039 2040 2041 2042 2043 2044 2045 2046
-K33:
JNE SU8 NOV NOV NUL ADD MOV JMP
LOOK FOR
MOV MOV REPNE
K33 0 I ,OFFSET K30+ 1 AL,ALT INPUT AH,la AH
AX,DI AL T INPUT ,AL K26
SUPERSHIFT ENTRY
ALT INPUT,a CX,26 SCASB
NO AL T KEYPAD D I ~NOW-HAS ENTRY VALUE GET THE CURRENT BYTE MUL TIPLY BY 10
ADD IN THE LATEST ENTRY STORE IT AWAY THROW AWAY THAT KEYSTROKE
NQ-AL T-KEYPAD
ZERO ANY PREV 10US ENTRY I NTO DI,ES ALREADY POINTING LOOK FOR MATCH I N ALPHABET
INPUT
2041
2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 206 I 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2013 2014 2015 2016 2011 2018 2019 2080 2081 2082 2083
2084 2085 2086 2081 2088 2089
2090 2091 2092 2093 2094 2095 2C.96 2097 2098 2099 2100 2101 2102 2 I 03 2104 2105 2106
---K34:
--K35: K36: K37:
--K38; ;----;-----
K39 ;
K34
AL, a
K57
NOT FOUND, FUNCT I ON KEY OR OTHER ASC I I CODE OF ZERO PUT IT IN THE BUFFER
LOOK FOR TOP ROW OF ALTERNATE SHIFT
e"p
JB
e"p
JAE
ADD
MDV
JMP
AL,2 K35 AL,I4 K35 AH,I18
AL,O K57
; ALT-TOP-ROW ; KEY WITH' I ' ON IT
NOT ONE OF INTERESTING KEYS IS IT IN THE REGION ; ALT-FUNCTION ; CONVERT PSUEDO SCAN CODE TO RANGE ; INDICATE AS SUCH ; BUFFER_F I LL
TRANSLATE ALTERNATE SHIFT PSEUDO SCAN CODES
C"P JAE
J"P
e"p
JAE "DV JNP
AL,59 K37
K2.
AL,71 K3. BX,OFFSET K13 Kb3
ALT-FUNCTION TEST FOR I N TABLE ALT-CONT I NUE CLOSE-RETURN I GNORE THE KEY ALT-CONT I NUE I N KEYPAD REG I ON IF SO, IGNORE ALT SHIFT PSEUOO SCAN TABLE TRANSLATE THAT
NOT IN ALTERNATE SHIFT
TEST Jl
K8 FLAG, CTL SH I FT
K44
-
NOT-ALT-SHIFT
ARE WE IN CONTROL SHIFT NOT-CTL-SHIFT
CONTROL SHIFT. TEST SPECIAL CHARACTERS TEST FOR BREAK AND PAUSE KEYS
C"P JNE "OV NOV NOV NOV INT SUB JNP
C"P JNE DR
"DV OUT
AL.SCROLL KEY
K39
-
aX.BUFFER START 8UFFER HEAD,BX 8UFFER-TA IL,BX
810S 8REAK,80H 18H -
AX, AX K57
AL,NUM KEY
K41
K8 FLAG I ,HOLD STATE
"'L~EOI -
-
020H,AL
TEST FOR BREAK NO-BREAK RESET BUFFER TO ENPTY
TURN ON BIOS BREAK BIT BREAK I NTERRiJPT VECTOR PUT OUT DUMMY CHARACTER BUFFER FILL NO-BREAK LOOK FOR PAUSE KEY NO-PAUSE TURN ON THE HOLD FLAG END OF I NTERRUPT TO CONTROL PORT ALLOW FURTHER KEYSTROKE I NTS
DURING PAUSE INTERVAL, TURN CRT BACK ON
CNP
J"
MDV
"DV OUT
CRT MODE,1
K40
OX,03D8H
AL,CRT MODE
aX,AL -
SET
IS TM I S BLACK AND WH I TE CARD YES, NOTHING TO DO PORT FOR COLOR CARD
GET THE VALUE OF THE CURRENT MODE SET THE CRT NODE. SO THAT CRT I S ON
PC-XT System BIOS (11/08/82) 5-135
LOC OBJECT
EB40 EB40 EB45 EB47
EB4A
F606180008 75F9 E914FF
EB4A EB4C E84E EB51
3C31 1506 B80012 E98100
E854 EB54 BB8EE8 EB57 3C38
EB59 1216 E85S E858 BBCBE8 EB5E E9BCOO
EB6\ EB61 3C41 E863 732C
EB65 F606110003 EB6A H5A
EB6C 3COF EB6E 1505 E870 88000F
E873 EB60
E815 E815 3C37 EBn 1509
EB79 8020 E878 E620 EB7D C005 E81F E90CFE E882 E882 308 E884 1206
EB86 8855E9 E889 E99100 E88C EB8C 881 BE9
EB8F E840
E891 E891 F606170020 E896 7520 EB98 F606110003
EB90 1520
EB9F EB9F 3C4A EBA 1 140B EBA3 3C4E EBA5 HOC EBA7 2C41
EBA9 8B16E9 EBAC EB71 E8AE EBAE B8204A EBSI E822 EB83 EBB3 882B4E EB86 E810
E8B8 EBB8 F606110003 EBBO 15EO
EBBF EBBF 2C46 EBC I 8B69E9
E8C4 E808
E8C6 EBC6 3C38 EBC8 1204 EBCA BOOO EBCC EB01
EBCE EBCE B8E I E8
E801 EBOI FEC8 E803 2E01
EBD5 EBD5 E8D1 EBD9 EBOC
3CFF 741F 80FCFF 141A
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER )(T) 11/08/82
2107 K40:
PAUSE-LOOP
2! 08 2109 21 j 0
21' ,
K41:
TEST JNL JMP
KB FLAG I, HOLD STATE
K40
-
-
K21
LOOP UNT I L FLAG TURNED OFF
INTERRUPT RETURN NO EO!
NO-PAUSE -
-
2112
2113 ;- - TEST SPECIAL CASE KEY 55
2114
2115
AL,55
2116
K42
NOT-KEY--55
2117
A)(,114-256
START/STOP PRINTING SWITCH
2 I 18
K51
BUFFER _F I LL
2119
2120 ;----- SET UP TO TRANSLATE CONTROL SHIFT
2121
2122 K42:
NOT-KEY-55
2123
MOV
BX, OFFSET K8
SET UP TO TRANSLATE eTL
2124
CMP
AL,59
IS IT IN TABLE
2125
CTL -TABLE- TRANSLATE
2126
JB
K56
YES, GO TRANSLATE CHAR
2127 K43:
CTL -T ABLE- TRANSLATE
2128
MOV
8)(, OFFSET K9
CTL TABLE SCAN
2129
JMP
K63
TRANSLATE_SCAN
2130
213'
- NOT IN CONTROL SHIFT
2132
2133 K44:
NOT-CTL-SHIFT
2134
CMP
AL,l1
TEST FOR KEYPAD REGION
2 I 35
JAE
K48
HANDLE KEYPAD REGION
2136 2131
TEST J L
KB FLAG,LEFT SHIFT+R1GHT SHIFT
K54
I TEST FOR SHIFT STATE
2138
2'39 ; -- UPPER CASE, HANDLE SPECIAL CASES
2140
2141
CMP
AL,15
BACK TA8 KEY
2142 2143
JNE MOV
K45 AX,15-256
NOT-BACK-TAB SET PSEUDO SCAN CODE
2144
JMP
SHORT K51
BUFFER FILL
2145 K45:
NOT-BACK-TAB
2146
CMP
AL,55
PRINT SCREEN KEY
2141
JNE
K46
NOT-PR I NT-SCREEN
2148
2149
I SSUE I NTERRUPT TO I NO I CATE PR I NT SCREEN FUNCTI ON
2150
2 I5I 2 I 52 2153
2154 2155
K46:
OOV OUT INT JMP
AL,EOI 020H, AL 5H K21
END OF CURRENT INTERRUPT SO FURTHER THINGS CAN HAPPEN
ISSUE PRINT SCREEN INTERRUPT GO BACK WITHOUT EO! OCCURR ING NOT-PR I NT-SCREEN
2156
CMP
AL,59
FUNCT I ON KEYS
2151
JB
K41
NOT-UPPER-FUNCTION
2158
MOV
BX,OFFSET KI2
UPPER CASE PSEUDO SCAN CODES
2159 2160 K41:
JMP
K63
TRANSLATE SCAN NOT-UPPER~FUNCT I ON
2 I 61
MOV
B)( ,OFFSET KII
POINT TO UPPER CASE TABLE
2102
JMP
SHORT K56
OK, TRANSLATE THE CHAR
2163
2164 ;----- KEYPAD KEYS, MUST TEST NUM LOCK FOR DETERMINATION
2165
2166 K48:
; KEYPAD-REGION
2167
TEST
KB_FLAG,NUM_STATE
; ARE WE IN NUM LOCK
2168
JNL
K52
; TEST FOR SURE
2169
TEST
K8 FLAG,LEFT SHIFT+R1GHT SHIFT : ARE WE IN SHIFT STATE
2170
JNZ
K53
-
; IF SHIFTED, REALLY NUM STATE
2171
2112 ; ---- BASE CASE FOR KEYPAD
2113
2114 K49: 2115
CMP
AL,14
BASE-CASE SPECIAL CASE FOR A COUPLE OF KEYS
2176
JE
K50
MINUS
2117
CMP
AL ,18
2178
JE
K51
2179
5UB
AL,11
CONVERT OR I GIN
2180
MOV
B)(,OFFSET KI5
BASE CASE TABLE
218' 2182 K50 :
JMP
SHORT K64
CONVERT TO PSEUDO SCAN
2183
MOV
AX,14-256+'-'
MINUS
2184
JMP
SHORT K51
BUFFER_FILL
2185 K51:
2186
MOV
A)(,18-256+'+'
PLUS
2187
JMP
SHORT K5T
BUFFER_F!LL
2188
2189
- MIGHT BE NUM LOCK, TEST SHIF"T STATUS
2190
2191 K52 :
; ALMOST-NUM-STATE
2192 2193
TEST JNL
KB FLAG,LEFT SHIFT+RIGHT SHIFT
K49
-
1 SH I FTED TEMP OUT OF NUM STATE
2194 K53:
; REALLY NUM STATE
2195 2196
SUB MOV
AL,70 BX,OFFSET K14
: CONVERT ORIGIN NUt.( STATE TABLE
2191
JMP
SHORT K56
, TRANSLATE_CHAR
2198
2199 ;----- PLAIN OLD LOWER CASE
2200
2201 K54:
NOT-SHIFT
2202 2203 2204
CMP
JB MOV
AL,59 K55 AL,O
TEST FOR FUNCTION KEYS NOT-LOWER-FUNCT I ON
SCAN CODE IN AH ALREADY
2205
JMP
SHORT K57
BUFFER FILL
2206 K55 :
NOT-LOiER-FUNCT I ON
2201
MOV
B)(,OFFSET KIO
LC TABLE
2208
2209 ; - - - TRANSLATE THE CHARACTER
2210
221 1 K56:
2212
DEC
AL
TRANSLATE- CHAR CONVERT OR I GIN
2213
XLAT
CS:Kl I
CONVERT THE SCAN CODE TO ASC 1 I
2214
2215 ;----- PUT CHARACTER INTO BUFFER
2216
2211 K51:
BUFFER-FILL
2218
CMP
AL,-I
I S TH I S AN I GNORE CHAR
2219 2220
JE CMP
K59 AH,-1
YES, 00 NOTHING WITH IT LOOK FOR - I PSEUDO SCAN
2221
JE
K59
NEAR_ INTERRUPT_RETURN
2222
5-136 PC-XT System BIOS (11/08/82)
LOC OB.JECT
EBDE EBDE F606170040 EBE3 7420
EBE5 F6061 70003 EBEA 740F
EBEC 3C41 EBEE 7215 EBFO 3C5A EBF2 77 I I EBF4 0420 EBF6 EBOO EBFa EBF8 E95EFE
EBF8 EBFB 3C61 EBFO 7206 E8FF 3C7A ECO I 7702 EC03 2C20 EC05 EC05 881EICOO EC09 88F3 EC08 E863FC ECOE 381E1AOO ECI2 7413 EC14 8904 ECI6 891EICOO EC I A E93CFE
ECID ECIO ECIF ECIF EC21 EC23 EC25
2C38
2ED7 8AEO 8000 E8AE
EC27
EC27 8020
EC29 E620
EC28 B88000
EC2E E461
EC30 50
EC31
EC31 24FC
EC33 E66 I
EC35 894800
EC38
I:C38 E2FE
EC3A OC02
EC3C E661
EC3E 894800
EC41
EC41 E2FE
EC43 48
EC44 75EB
EC46 58
EC47 E661
EC49 E912FE
EC4C EC50 EC51 EC52 EC55 EC56
20333031
00
OA
36303 I
00
OA
LINE SOURCE IBIOS FOR THE IBM PERSONAL. COMPUTER XTI I I f08f82
2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249
2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2212 2273 2274 2215 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300
HANDLE THE CAPS L.OCK PROBL.EM
K58 :
TEST JZ
KB FL.AG,CAPS STATE K61
BUFFER -F] LL -NOTEST ARE WE 1N CAPS LOCK STATE SKIP IF NOT
;----- IN CAPS L.OCK STATE
TEST .JZ
K8 FLAG,LEFT SHIFT+R[GHT SHIFT ; TEST FOR SHIFT STATE
K60
-; I F NOT SH I FT, CONVERT LOWER TO UPPER
; ----- CONVERT ANY UPPER CASE TO LOWER CASE
e"p
JB
e"p
JA
ADD
K59:
J"P
J"P
AL, 'A' K61
AL, 'z'
K61 AL,' a' -, A' SHORT K61
K26
F I NO OUT I F ALPHABET I C NOT_C ....PS_STATE
NOT C....PS ST .... TE
CONVERT To LOWER CASE
; NOT CAPS ST .... TE NEAR-] NTERRUPT-RETURN 1NTERRUPT _RETURN
--- CONVERT ANY LOWER CASE TO UPPER CASE
K60: K61:
eMP JB GMP JA SUB
MO'
"0'
C .... LL
e"p
JE "OV MOV JMP
AL.,'i!I'
K61 AL, 'z.' K61 AL.,·.' -'A'
BX,BUFFER TAIL.
SI,BX
K4
BX,BUFFER HEAD
K62
[S 1 J, .. X
BUFFER TAIL,BX K26
LOWER - TO-UPPER FIND OUT IF ALPHABETIC NOT CAPS_STATE
NOT CAPS STATE CONVERT TO UPPER CASE NOT-CAPS-STATE GET THE END PO I NTER TO THE BUFFER SAVE THE VALUE ADVANCE THE TAIL HAS THE BUFFER WR ....PPEO ....ROUND 1 BUFFER FULL BEEP , STORE THE VALUE 1 MOVE THE PO I NTER UP ; INTERRUPT_RETURN
; ----- TRANSLATE SCAN FOR PSEUDO SC ....N CODES
K63: K64:
SUB
XL .... T
"0'
MO' JMP
AL,59
CS:K9 AH,AL AL.,O K51
TRANSL .... TE-SCAN CONVERT ORIGIN TO FUNCTION KEYS TRANSL .... TE - SC ....N-ORGO
CTL TABLE SCAN PUT VALUE INTO AH
ZERO A SC 1 1 CODE PUT 1T 1NTO THE BUFFER
KB_tNT ENOP
--- BUFFER IS FULL, SOUND THE BEEPER
K62: 1(65: K66: K67 :
"0'
OUT MO' IN PUSH
AND OUT MOV
LOOP OR OUT MOV
LOOP DEC JNZ POP OUT JMP
....L..EOI 20H,AL.
BX,080H
AL,KB CTL.
AX
AL. ,OFCH
KB CTL,AL
CX-;48H
K66
AL,2
KB CTL,AL
CX-; 48H
Kb1 BX K65
AX
KB CTL,AL
K27
BUFFER-FULL -BEEP END OF I NTERRUPT COMMAND SEND COMMAND TO I NT CONTROL PORT NUMBER OF CYCLES FOR' I 12 SECOND TONE GET CONTROL I NFORMAT I ON SAVE BEEP-CYCLE TURN OFF TIMER G.... TE AND SPE ....KER DATA OUTPUT TO CONTROL H ....LF CYCLE TIME FOR TONE
SPEAKER OFF TURN ON SPEAKER BIT OUTPUT TO CONTROL SET UP COUNT
ANOTHER HALF CYCLE TOT AL T I ME COUNT 00 ....NOTHER CYCLE RECOVER CONTROL OUTPUT THE CONTROL.
DB
30 1',13,10
230 I
DB
'60" .13,10
Dr SKETTE ERROR
PC-XT System BIOS (11/08/82) 5-137
LOC OB..IECT
EC59 EC59 EC59 F8 EC5A 53 EC5B 51 EC5C IE EC5D 56 EC5E 51 EC5F 55 EC60 52 EC6! 68EC EC63 E6F30D EC66 EI3ICOO EC69 BB0400 EC6C E8FDO 1 EC6F 88264000 EC136A264100 EC11 BOFCO I EC1A F5 EC1B 5A EC1C 5D EC7D 5F EC7E 5E EC1F IF EC60 59 EC6 I 58 ECB2 CA0200
ECB5 EC85 8AFO EC81 60263F001F EC8C OAE4 EC8E 7421 EC90 FECC ECn 7413 EC94 C606410000 EC99 80FA04 EC9C 1313 EC9E FECC ECAO 7469 ECA2 FECC ECA4 1503 ECAb E99500 ECA9 ECA9 FECC ECAB 1461 ECAO FECC ECAF 1461 ECBI ECBI C60641 000 I ECBb C3
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XTl 11/013/132
2302 2303 2304 2305 230b 2301 2308 2309 2310 2311 2312 2313 2314 2315 231b 2311 23113 2319 2320 2321 2322 2323 2324 2325 232b 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2331 2338 2339 2340 2341 2342 2343
2344 2345 234b 2341 2348 2349 2350 2351 2352 2353 2354 2355 2356 2351 2358 2359
23bO 2361 2362 2363 23b4 23b5 236b 23bl 23b8 2369 2310 2311 2312 2313 2314 2315 2316 2311 2318 2319 2380 2381 2382 2383 2384 2385 2386 2381 2388 2389 2390 2391 2392 2393 2394 2395 2396 2391 2398 2399 2400 2401 2402 2403 2404 2405 2406 2401 2408 2409 2410 2411
INT 13 -- --------------------
----------
DISKETTE I/O
THIS INTERFACE PROVIDES ACCESS TO THE 5 1/4 DISKETTE DRIVES
INPUT
IAH!:O RESET DISKETTE SYSTEM
HARD RESET TO NEC, PREPARE COMMAND, RECAL REQUIRED
ON ALL DR I VES
(AHI=l READ THE STATUS OF THE SYSTEM INTO (ALl
DISKETTE_STATUS FROt.4 LAST OPERATION IS USED
REGISTERS FOR READ/WRITE/VERIFY/FQRMAT lOLl - DRIVE NUM8ER (0-3 ALLOWED, VALUE CHECKED I (DHI - HEAD NUMBER 10-1 ALLOWED, NOT VALUE CHECKED) ICHI - TRACK NUMBER (0-39, NOT VALUE CHECKED) ICLI - SECTOR NUMBER 11-13, NOT VALUE CHECKED, NOT USED FOR FORMAT) ( AL) - NUMBER OF SECTORS ( MAX :: 8, NOT VALUE CHECKED, FOR FORMATI IES:8X) - ADDRESS OF BUFFER ( NOT REQUIRED FOR VERIFY)
NOT USED
IAH):2 (AHI =3 (AHI =4 (AHI =5
READ THE DESIRED SECTORS INTO MEMORY WRITE THE DESIRED SECTORS FROM MEMORY VERIFY THE DESIRED SECTORS FORMAT THE DESIRED TRACK FOR THE FORMAT OPERATION, THE BUFFER POINTER lES,BXI MUST POINT TO THE COLLECTION OF DESIRED ADDRESS FIELDS
FOR THE TRACK. EACH FIELD IS COMPOSED OF 4 BYTES,
IC,H,R,N), WHERE C = TRACK NUMBER, H=HEAD NUMBER,
R = SECTOR NUMBER, N: NUMBER OF BYTES PER SECTOR (00=128,01=256,02:::512,03=1024). THERE MUST BE ONE ENTRY FOR EVERY SECTOR ON THE TRACK. THIS INFORh4ATiON
I S USED TO F I NO THE REQUESTED SECTOR OUR I NG READ / WR I TE ACCESS.
DATA VARIABLE - DISK POINTER
DOU8LE WORD POINTER TO THE CURRENT SET OF DISKETTE PARAh4ETERS OUTPUT
AH = STATUS OF OPERATION STATUS BITS ARE DEFINED IN THE EQUATES FOR DISKETTE STATUS VARIA8LE IN THE DATA SEGMENT OF THIS MODULE. -
CY = a SUCCESSFUL OPERATION IAH=O ON RETURN)
CY = I FAILED OPERATION !AH HAS ERROR REASON)
FOR READ/WRITE/VERIFY
DS,BX,DX,CH,CL PRESERVED
AL = NUMBER OF SECTORS ACTUALLY READ
····· AL MAY NOT BE CORRECT 1FT I h4E OUT ERROR OCCURS
NOTE I
IF AN ERROR IS REPORTED BY THE DISKETTE CODE, THE
APPROPRIATE ACTION IS TO RESET THE DISKETTE, THEN RETRY
THE OPERATION. ON READ ACCESSES, NO MOTOR START DELAY
J S TAKEN, SO THAT THREE RETR I ES ARE REQU I RED ON READS
TO ENSURE THAT THE PROBLEh4 J S NOT DUE TO h40TOR
START-UP.
ASSUME
ORG DISKETTE 10
STI PUSH PUSH PUSH PUSH PUSH PUSH PUSH NOV CALL CALL MOV CALL MOV MOV
CMP CMC POP POP POP
POP POP POP POP RET OISKETTE_IO
CS: CODE, OS: OAT A ,ES: OAT A
OEC59H
PROC
FAR
I NTERRUPTS BACK ON
BX
SAVE ADDRESS
CX
os
SAVE SEGt.lENT REGISTER VALUE
S 1
SAVE ALL REGISTERS DURING OPERATION
DI
BP
OX
BP,SP
SET UP PO I NTER TO HEAD PARM
DDS
JI
CALL THE REST TO ENSURE OS RESTORED
BX,4
GET THE ,,",OTOR WA I T PARAMETER
GET PARM
MOTOR COUNT, AH
SET THE T I h4ER COUNT FOR THE MOTOR
AH,DI5KETTE STATUS
GET STATUS OF OPERATION
AH, T
-
SET THE CARRY FLAG TO I NO I CA TE
SUCCESS OR FAILURE
DX
RESTORE ALL REGISTERS
BP
01
S 1
OS
CX
BX
RECOVER ADDRESS
2
I THROW AWAY SAVED FLAGS
ENDP
..12: J3:
PROC MDV AND OR JZ DEC JZ
"0'
CMP JAE DEC JZ DEC JNZ JMP
DEC JZ DEC JZ
MOV RET ENDP
NEAR
DH,AL
SAVE' SECTORS IN OH
MOTOR STATUS,OlFH
INDICATE A READ OPERATION
AH,AH
AH=O
DISK RESET AH -
I AH=1
DISK STATUS
DISKETTE STATUS,O
DL ,4
-
RESET THE STATUS INDICATOR TEST FOR DRIVE IN 0-3 RANGE
J3
ERROR I F ABOVE
AH
AH=2
DISK READ
AH -
AH=3
J2
TEST_OISK_VERF
DISK_WRITE
TEST DISK VERF
AH
AH=4
DISK VERF AH -
AH::5
DISK_FORMA T
BAD COMMAND
01 SKETTE_ST ATUS ,BAD_CMD ERROR CODE, NO SECTORS TRANSFERRED
UNDEFINED OPERATION
5-138 PC-XT System BIOS (11/08/82)
r"...
LOC OBJECT
ECB1 EC81 8AF203 EC8A FA ECBB A03FOO ECBE Bl04 ECCO 02EO ECC2 A820 ECC4 150C ECC6 A840 ECC8 1506 ECCA A880 ECCC 1406 ECCE FECO ECOO ECDO FECO EC02 EC02 FECO EC04 EC04 OC08 EC06 EE EC01 C6063EOOOO ECOC C606410000 ECEI OC04 ECE3 EE ECE4 FB ECE5 E82A02
ECE8 A04200 ECEB 3CCO ECEO 1406 ECEF 800E410020 ECF4 C3
ECF5 ECF5 8403 ECF1 E84101 ECFA BB0100 ECFO E86CO 1
EOOO BB0300 E003 E86601 E006 E006 C3
E001 E001 A04100 EOOA C3
~
EOOB EOOB B046 EOOO EOOO E8B80 1 EOIO B4E6 ED 12 E836
EOl4 EDI4 B042 EOl6 E8F5
EOl8 ED 18 800E3F0080 EOIO B04A ED I F E8A60 I E022 B440 E024 E824 E026 E026 880100 E029 E84001 E02C BB0900 ED2F E83AO 1 ED32 880FOO ED35 E83401
ED38 BBl100 ED3B E9ABOO
ED3E ED3E 800E3F0080 ED43 B04A ED45 E8800 I ED48 B4C5
~
LINE SOURCE IBIOS FOR THE IBM PERSONAL COMPUTER Xl) '1108/82
2412 2413 2414 2415 2416 2411 2418 2419 2420 2421 2422 2423 2424 2425 2426 2421 2428 2429 2430 2431 2432 2433 2434 2435 2436 2431 2438 2439 2440 2441 2442 2443 2444 2445 2446 2441 2448 2449 2450 2451 2452 2453
2454 2455 2456 2451 2458 2459 2460 2461 2462 2463 2464 2465 2466 2461 2468 2469 2410 2411 2412 2413 2414 2415 2416 2411 2418 2419 2480 2481 2482 2483 2484 2485 2486 2481 2488 2489 2490 2491 2492 2493 2494 2495 2496 2491 2498 2499 2500 2501 2502 2503 2504 2505 2506 2501 2508 2509 2510 2511 2512 2513
:----- RESET THE DISKETTE SYSTEM
- DISK RESET "OV CLI
"OV "OV SAL TEST JNZ TEST JNZ TEST JZ INC J4: INC J5: INC J6:
OR OUT
"OV "OV OR OUT STI CALL
"OV C"P JZ OR RET
PROC
NEAR
OX,03F2H
AL,MOTOR
CL,4 AL,CL
AL, 20H J5 AL, 40H J4 AL, 80H Jb AL
STATUS
AL
AL
AL,8 OX,AL SEEK STATUS,O
- 01 SKETTE STATUS,O
AL,4 OX,AL
- CHK- STAT 2
AL,NEC_STATUS AL,OCOH J1 01 SKETTE_STA TUS ,BAD_NEC
ADAPTER CONTROL PORT NO INTERRUPTS WHICH MOTOR IS ON SHIFT COUNT MOVE MOTOR VALUE TO HIGH NYBBLE SELECT CORRESPOND I NG DR I 'IE JUMP I F MOTOR ONE I S ON
JUMP I F MOTOR TWO I S ON
I F MOTOR ZERO I S ON
TURN ON I NTERRUPT ENABLE RESET THE ADAPTER SET RECAL REQU I RED ON ALL DR I VES SET OK STATUS FOR DISKETTE TURN OFF RESET TURN OFF THE RESET REENABLE THE INTERRUPTS 00 SENSE INTERRUPT STATUS
FOLLOW I NG RESET IGNORE ERROR RETURN AND DO OWN TEST TEST FOR DRIVE READY TRANSITION EVERYTH I NG OK SET ERROR CODE
SEND SPEC I FY COMMAND TO NEC
J1:
"OV CALL "OV CALL
"OV CALL J8: RET DISK_RESET
AH,03H NEC OUTPUT Bx,T
GET- PARM
BX,3
GET- PARM
ENDP
DR I 'IE READY SPEC I FY COMMAND OUTPUT THE COMMAND FIRST BYTE PARM IN BLOCK
TO THE NEC CONTROLLER
SECOND BYTE PARM I N BLOCK TO THE NEC CONTROLLER
RESET RET RETURN TO CALLER
:----- DISKETTE STATUS ROUTINE
DISK STATUS
-
MOV
RET
DISK_STATUS
PROC
NEAR
AL,DI SKETTE_STATUS
ENDP
;----- DISKETTE READ
01 SK READ
-
MOV
J9;
CALL
"OV
J"P 01 SK_REAO
PROC
NEAR
AL,046H
DMA SETUP
AH,OE6H
SHORT RW OPN
ENDP
-
READ COMMAND FOR DMA DISK READ CONT SET UP THE DMA SET UP RD COMMAND FOR NEC CONTROLLER GO DO THE OPERAT I ON
;----- DISKETTE VERIFY
01 SK VERF
-
1010'1
J"P DISK_VERF
PROC
NEAR
AL,042H
J9
ENDP
VER I FY COMMAND FOR DMA 00 AS IF DISK READ
;----- DISKETTE FORMAT
01 SK FORMAT - OR
"OV CALL
Jl0;
"OV J"P
"OV CALL
"OV CALL
"OV CALL
"OV
J"P 01 SK_FORMAT
PROC
NEAR
MOTOR STATUS,80H
AL,04AH
DMA SETUP
AH,04DH
SHORT RW_OPN
BX,1 GET PARM BX,9 GET PARM BX.15 GET PARM BX,11
Jib ENDP
INDICATE WRITE OPERATION
WILL WRITE TO THE DISKETTE
SET UP THE DMA
EST ABL I SH THE FORMAT COMMAND
DO THE OPERAT I ON
CONTINUATION OF RW OPN FOR FMT
GET THE
-
B'fTESISECTOR VALUE TO NEC
GET THE
SECTORS/TRACK VALUE TO NEC
GET THE
GAP LENGTH VALUE TO NEC
GET THE FILLER BYTE
TO THE CONTROLLER
:----- DISKETTE WRITE ROUTINE
DISK WRITE - OR
"OV CALL "OV DISK_WRITE
PROC
NEAR
MOTOR STATUS,80H
AL,04AH
DMA SETUP
AH,OC5H
ENDP
INDICATE WRITE OPERATION DMA WR I TE COMMAND
NEC COMMAND TO WR I TE TO 0 I SKETTE
- ALLOW WR I TE ROUT I NE TO FALL INTO RW_OPN
PC-XT System BIOS (11/08/82) 5-139
LaC OBJECT
E04A E04A 7308 E04C C606410009 ED51 BOOO E053 C3 E054 E054 50
E055 51 E056 8ACA E058 800 I E05A 02EO ED5C FA
E050 C6064000FF E062 84063FOO E066 7531 E068 80263FOOFO ED60 08063FOO E071 FB E0728010 E074 02EO E076 OAC2 E018 OCOC EOl A 52 E07B BAF203 ED7E EE E07F SA
E080 Fb063F0030 E0851412 E031 8B1400 ED8A E80FOO ED 3D OAE4 ED8F ED8F 7408 E091 2BC9 E093 ED93 E2FE ED95 FECC E097 EBF6 E099 ED99 FB ED9A 59
ED9B E80FOO ED9E 58 E09F 8AFC EOA I B600 EOA3 724B EOA5 BEFOED90 EOA9 56
EDAA E89400 EDAD 8A660 1 EDBO DOE4 EDBl 00E4 EOB4 80E404 EOB7 OAE2 E089 E63500
EDBC 80FF4D EDBF 7503 EDCI E962FF EDC4 EOC4 8AE5 EDC6 E87300 EDC9 8A660 1 EDCC E87200 EDCF 8AE I EDDI E86DOO EOD4 BB0700 E007 E89200 EDDA B80900 EDOD E88COO EDEO BBOBOO EDE3 E88600 EOE6 BBODOO EDE9 EOE9 E88000 EOEC 5E
EOEO E8430 I EDFO EOFO 1245 EOF2 E6140 I EDF5 723F
EDF7 FC EDF8 BE4200 EOFB AC EDFC 24CO EOFE 7438 EEOO 3C40 EE02 7529
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER Xl) 11/08/82
2514 :-~;-O;~---- --- ---- ------------- -- ------------ --- --------------
2515
2516 2511 2518 2519 2520 2521 2522 2523 2524
: ~;~OPN
..I I I I
TH' S ROUT I NE PERFORMS THE READ I WR I TE I VER' FY OPERA T I ON PROC --~~~~-------------------- - - - - - - - - - - - - - - - -
..INC MOV MOV RET
PUSH
..III
; TEST FOR DMA ERROR
01 SKETTE STATUS,DMA BOUNDARY
; SET ERROR
AL, 0
-
- ; NO SECTORS TRANSFERRED
; RETURN TO MA I N ROUT I NE
; DO RW OPN
AX
; SAVE THE COMMAND
2525 2526
- TURN ON THE MOTOR AND SELECT THE DRIVE
2527 2528 2529
2530 2531 2532 2533 2534 2535 2536 2537 2538
2539 2540 2541 2542 2543
2544
2545 2546 2547 2548 2549
PUSH
"OV "OV SAL eLI
MOV TEST JNZ AND OR ST I NOV SAL OR OR PUSH NOV OUT POP
ex
CL,DL AL,I AL,CL
MOTOR COUNT. OFFH
AL,MOYOR STATUS
..114
-
MOTOR STATUS,OFOH
MOTOR-STATUS. AL
AL,IOH
AL,CL AL,DL
AL,OCH ox
OX,03F2H OX ,AL ox
SAVE THE TIS PARMS GET DRIVE NUMBER AS SHIFT COUNT MASK FOR DETERMINING MOTOR BIT SHIFT THE MASK 81T NO INTERRUPTS WH I LE DE TERM I N I NG
MOTOR STATUS SET LARGE COUNT DURING OPERATION TEST THAT MOTOR FOR OPERATING IF RUNNING, SKIP THE WAIT TURN OFF ALL MOTOR BI TS TURN ON THE CURRENT MOTOR I NTERRUPTS BACK ON MASK BIT DEVELOP BIT MASK FOR MOTOR ENABLE I GET DRIVE SELECT 81TS IN NO RESET, ENABLE DMA f I NT SAVE REG CONTROL PORT ADDRESS
RECOVER REG I STERS
---- WAIT FOR MOTOR IF WRITE OPERATION
2550 2551 2552 2553 2554 2555
TEST JZ
"OV CALL OR
MOTOR STATUS,80H JI4 BX,20 GET PARM
AH,AH
IS THIS A WRITE NO, CONTINUE WITHOUT GET THE MOTOR WA I T
PARAMETER TEST FOR NO WAIT
WAIT
2556 2557 2558 2559
2560 2561
2562
2563 2564
2565 2566 2567
2568 2569 2510 2571 2572
2573 2574 2575
2576 2577 2571:1 2579 2580 2531 2532 2533 2534
2535 2586 2537
..112: ..113:
..114:
JZ SUB
LOOP DEC JMP
ST I POP
J CX",cx
JI3 AH JI2
CX
-- DO THE SEEK OPERAT I ON
TEST WAIT TIME EXIT-WITH-TIME EXPIRED
SET UP I 18 SECOND LOOP T I ME
WAIT FOR THE REQUIRED TIME
DECREMENT T I ME VALUE
ARE WE DONE YET
MOTOR RUNN I NG
I NTERRUPTS BACK ON FOR BYPASS
WA I T
CALL POP NOV NOV JC
"OV PUSH
SEEK AX
BH,AH DH,O
Ji1 SI,OFFSET Ji1 51
MOVE TO CORRECT TRACK
RECOVER COMMAND SAVE COMMAND IN BH SET NO SECTORS READ IN CASE OF ERROR rF ERROR, THEN EX I T AFTER MOTOR OFF DUMMY RETURN ON STACK FOR NEC OUTPUT
SO THAT IT WILL RETURN TO MOTOR OFF
LOCATION
SEND OUT THE PARAMETERS TO THE: CONTROLLER
CALL MOV SAL SAL AND
OR CALL
NEC OUTPUT AH.TBP+I] AH,I AH, I
AH,4 AH,DL NEC_OUTPUT
OUTPUT THE OPERAT I ON COMMAND
GET THE CURRENT HEAD NUMBER
MOVE IT TO BIT 2
I ISOLATE THAT BIT
OR I N THE DR I VE NUMBER
2588 2569
2590 2591 2592
2593 2594 2595
2596 2597 2593 2599 2600 260 I 2602 2603 2604
2605 2606 2t'>07 2608 2609 2t'> I 0
;--..115:
..116:
TEST FOR FORMA T COMMAND
CMP JNE J"F
NOV CALL NOV CALL NOV CALL "OV CALL MOV CALL NOV CALL NOV
BH,04DH JIS JIO
AH,CH NEe OUTPUT
AH, Tsp+ 1 ) NEe OUTPUT
AH,CL NEe OUTPUT
8X,7 GET PARM 8X,9 GET PARM 8X ,TI GET PARM BX, T3
CALL POP
- GET PARM
51
IS THIS A FORMAT OPERATION
NO. CONTINUE WITH R/W/V
I F SO, HANDLE SPEC I AL
CYL [NOER NUMBER
HEAD NUMBER FROM STACK
SECTOR NUMBER
BYTES/SECTOR PARM FROM BLOCK
TO THE NEC
EaT P ARM FROM BLOCK
TO THE NEC
GAP LENGTH PARM FROM BLOCK
TO THE NEC
DTL PARM FROM BLOCK
RW OPN FINISH
TO THE NEC
CAN NOW 0 I SCARO THAT DUMMY
RETURN ADDRESS
2611 2612 2613
26t4 2615
2616 2617 2618 2619 2620 2621 2622 2623 2624
2625 2626 2621 2t'>28 2629
..1111 ; - - ---
LET THE OPERAT I ON HAPPEN
CALL
WA IT_INT
Je CALL Je
J21 RESULT5 J20
CHECK THE RESULTS RETURNED BY
"OV LODS
AND JZ
e"F JNZ
S I ,OFFSET NEC STATUS NEC STATUS -
AL.OCOH J22 AL.040H JI8
THE
WAIT FOR THE INTERRUPT
MOTOR OFF
LOOK FOR ERROR
GET THE NEC STATUS
LOOK FOR ERROR
CONTROLLER
SET THE CORRECT DIRECTION
POINT TO STATUS FIELD
GET STO
TEST FOR NORMAL TERMINATION
OPN OK
TEST FOR A8NORMAL TERMINATION
NOT ABNORMAL, BAD NEC
5-140 PC-XT System BIOS (11/08/82)
LOC 08JECT
EE04 AC EE05 OOEO EEOl 8404 EE09 1224 EEOB OOEO EEOO OOEO EEOF B410 EEl I 121C EE 13 OOEO EElS 8408 EE11 1216 EE19 oOEO EEI8 oOEO EEIO 8404 EE1F 120E EE21 oOEO EE23 8403 EE25 1208 EE21 OOEO EE29 B402 EE2B 1202
EE2D EE2D 8420 EE2F EE2F 08264100 EE33 E81601 EE36 EE36 C3 EE31 EE31 E82FO I EE3A C3
EE3B EE38 E81001 EE3E 32E4 EE40 C3
EE41 EE41 52 EE42 51 EE43 BAF403 EE46 33C9 EE48 EE48 EC EE49 A840 EE4B 140C EE40 E2F9 EE4F EE4F 800E410080 EE54 59 EE55 SA EE56 58 EE51 F9 EE58 C3 EE59 EE59 33C9 EE58 EE58 EC EE5C A880 EE5E 1504 EE60 E2F9 EE62 EBEB EE64 EE64 6AC4 EEb6 82F5 EE68 EE EE69 ~9 EE6A SA EE6B C3
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XT) 11108/82
2630 ;----- A8NORMAL TERMINATION, FINO OUT WHY
2631
2632
LDDS
NEC STATUS
GET ST I
2633
SAL
AL,T
TEST FOR EOT FOUND
2634 2635
MOV JC
AH,RECORO NOT FND
...119
--
RW_FAIL
2636
SAL
AL, I
2637
SAL
AL, I
TEST FOR CRC ERROR
2638
MOV
AH,BAO CRC
2639
JC
JI9 -
RW FAIL
2640
SAL
AL,I
TEST FOR OMA OVERRUN
264. 2642
MOV JC
AH,BAO OMA JI9 -
RW_FAIL
2643
SAL
AL, I
2644
SAL
AL, I
TEST FOR RECORD NOT FOUND
2645 2646
MOV JC
AH, RECORD NOT FNo
..J19
-
RW_FAIL
2641
SAL
AL,I
2648
MOV
AH,WRITE PROTECT
TES T FOR WR I TE PROTECT
2649
JC
..J19
-
RW FAIL
2650
SAL
AL, I
TEST MISSING ADDRESS MARK
2651 2652
MOV JC
AH, BAD ADDR MARK
..J19 -
2653
2654
NEC MUST HAVE FAILED
2655
2656
RW-NEC-FA I L
2651
MOV
AH,BAD_NEC
2658 J19:
RW-FAIL
2659
OR
01 SKETTE_STATUS.AH
2660
CALL
NUM_TRANS
HOW MANY WERE REALLY TRANSFERRED
2661 ...120:
RW ERR
2662
RET
RETURN TO CALLER
2663 ...1211
; RW ERR RES
2664
CALL
RESUL TS
; FLUSH THE RESULTS BUFFER
2665
RET
2666
2661 1----- OPERATION WAS SUCCESSFUL
2668
2669 J22 :
OPN OK
2610
CALL
NUM TRANS
HOW-MANY GOT MOVED
2611
XOR
AH,AH
NO ERRORS
2612
RET
2613 RW_OPN ENOP
2614
2615
NEG OUTPUT
2616
- THIS ROUTINE SENDS A BYTE TO THE NEC CONTROLLER AFTER TESTING
2611
FOR CORRECT DIRECTION AND CONTROLLER READY THIS ROUTINE WILL
2618
TIME OUT IF THE BYTE IS NOT ACCEPTED WITHIN A REASONABLE
2619
AMOUNT OF TIME, SETTING THE DISKETTE STATUS ON COMPLETION.
2680
INPUT
2681
IAH)
BYTE TO BE OUTPUT
2682
OUTPUT
2683 2684
CY = CY =
SUCCESS FAILURE -- DISKETTE STATUS UPDATED
2685
I F A FA' LURE HAS OCCURRED, THE RETURN ! S MADE ONE LEVEL 1
2686
HIGHER THAN THE CALLER OF NEC OUTPUT.
2681
TH I S REMOVES THE REQU I REMENT OF TEST I NG AFTER EVERY
2688
CALL OF NEC OUTPUT.
2689 2690
---
-
(ALI
------
-D-E-S-T-R-O-Y-E-D--------
-
2691 NEC OUTPUT
2692
-
PUSH
PROC DX
NEAR
SAVE REG I STERS
2693
PUSH
CX
2694
MOV
DX,03F4H
STATUS PORT
2695
XOR
CX.CX
COUNT FOR T I ME OUT
2696
2691
IN
AL,DX
GET STATUS
2696
TEST
AL,040H
TEST DIRECTION BIT
2699
JZ
J25
DIRECTION OK
2100
LOOP
J23
2101 2102 2103
...124:
OR
POP
DISKETTE STATUS,TlME OUT; TIME_ERROR
CX
-
2104
POP
OX
SET ERROR CODE AND RESTORE REGS
2105
POP
AX
DISCARD THE RETURN ADDRESS
2106
STC
INDICATE ERROR TO CALLER
2107
RET
2108 ..J25 : 2109
XOR
ex.cx
RESET THE COUNT
2110 ..J26:
211 1
IN
AL,DX
GET THE STATUS
2112
TEST
AL,080H
I S IT READY
2113
JNl
J21
YES, GO OUTPUT
2114
LOOP
J2.
COUNT DOWN AND TRY AGAIN
2115
JMP
J24
ERROR CONo, T I ON
2116 ...121:
OUTPUT
2111
MOV
AL,AH
GET BYTE TO OUTPUT
2118
MOV
DL,OF5H
DATA PORT (3F51
2119
OUT
DX,AL
OUTPUT THE BYTE
2120
POP
CX
RECOVER REG I STERS
2121 2122
POP
ox
RET
; CY = 0 FROM TEST INSTRUCTION
2123 NEC_OUTPUT
ENDP
PC-XT System BIOS (11/08/82) 5-141
LOC OBJECT
EE6C EE6C IE EE6D 2BCO EE6F 8E08 EEll C5361800 EE15 D1EB
EE11 8A20 EE19 IF EE1A 12C5 EE1C C3
EE1D EE1D BOO 1 EE1F 51 EE80 8ACA EE82 D2CO EE84 59 EE85 84063EOO EE89 1513 EE8B 08063EOO EE8F B401 EE91 E8ADFF EE94 8AE2 EE96 E8A8FF EE99 E81600 EE9C 1229
EE9E EE9E B40F EEAO E89EFF EEA3 8AE2 EEA5 E899FF EEA8 8AE5 EEAA E894FF EEAD E86200
EEBO 9C
EEBI BB1200
EEB4 EBB5FF
EEB1 51
EEB8
EE88 B92602
EE8B OAE4
EE8D 1406
EE6F
EEBF E2FE
EEC 1 FECC
EEC3 EBF3
EEC5
EEC5 59
EEC6 90
EEC1
EECl C3
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
212.. 2125 2126 2121 2128 2129 2130 213 I 2132 2133 2134 2135 2136 2131 2138 2739 2140 2141 2142 2143 2144 2745 2746 2141 2148 2149 2150 2151 2752 2153 2154 2155 2756 2151 2158 2159 2160 2161 2162 2163 2164 2165 2166 2161 2168 2169 2110 2111 2112 2113 2114 2775 2776 277 7 2778 2779 2780 2781 2782 2183 2184 2185 2186 2187 2788 2789 2190 2791 2792 2793 2794 2195 2196 2191 2198 2199 2800 2801 2802 2803 2804 2805 2806 2801 2808 2809 2810 2811
; - - ------------- --- -- - --- - - - - - ------- - --- - ----------- - ---- ---- - -- ------
; GET PARM
;
- THIS ROUTINE FETCHES THE INDEXED POINTER FROM THE DISK BASE
;
BLOCK POINTED AT BY THE DATA VARIABLE DISK POINTER. A BYTE FROM
;
THAT TABLE IS THEN MOVED INTO AH, THE INDEX OF THAT BYTE BEING
;
THE PARM IN BX
ENTRY -
8X = I NDEX OF 8YTE TO BE FETCHED · 2
IF THE LOW BIT OF BX IS ON, THE BYTE IS IMMEDIATELY OUTPUT
TO THE NEC CONTROLLER
EX I T -
--A-H---:::--TH--A-T- B-YTE FROM BLOCK
GET PARM
PRQC
NEAR
-
PUSH
OS
SAVE SEGMENT
SUB
AX,AX
ZERO TO AX
"OV
DS,AX
ASSUME OS :ABSO
LOS SHR
SI,DISK POINTER BX,. -
PO I NT TO 8LOCK DIVIDE BX BY 2, AND SET FLAG
FOR EXIT
"OV
AH, (SI+BX)
GET THE WORD
POP
OS
RESTORE SEGMENT
ASSUME DS:DATA
JC
NEC_OUTPUT
IF FLAG SET, OUTPUT TO CONTROLLER
RET
RETURN TO CALLER
GET _PARM
ENDP
SEEK
TH I S ROUT I NE 'II I LL MOVE THE HEAD ON THE NAMED DR I VE TO THE
NAMED TRACK. IF THE DRIVE HAS NOT 8EEN ACCESSED SINCE THE
DRIVE RESET COMMAND WAS ISSUED, THE DRIVE WILL BE RECALIBRATED.
INPUT
= IOU = DRIVE TO SEEK ON
(CHI
TRACK TO SEEK TO
OUTPUT
= CY = 0 SUCCESS
CY I FAILURE,-- DISKETTE STATUS SET ACCORDINGLY
- -- (AXI DESTROYED
;~~;----;~oc--- ~~;~
MOV PUSH MOV ROL POP TEST
JNZ OR MOV
CALL MOV
CALL CALL
JC
CL,DL
AL,CL
CX
AL,SEEK STATUS
J26
SEEK STATUS,AL
AH,01H
NEC OUTPUT
AH,DL
NEC OUTPUT
CHK-STAT 2
J32-
-
ESTABLISH MASK FOR RECAL TEST SAVE INPUT VALUES GET DRIVE VALUE INTO CL SHIFT IT BY THE DRIVE VALUE RECOVER TRACK VALUE TEST FOR RECAL REQUIRED NO RECAL TuRN ON THE NO RECAL BIT IN FLAG RECAL I BRATE COMMAND
OUTPUT THE DR I VE NUMBER GET THE INTERUPT AND SENSE INT STATUS SEEK_ERROR
DRIVE IS IN SYNCH WITH CONTROLLER, SEEK TO TRACK
J28:
"OV CALL
"OV CALL
"OV CALL CALL
AH,OFH NEC OUTPUT AH,Dl NEC OUTPUT AH,CH NEC OUTPUT
CHK:=STAT_2
SEEK COMMAND TO NEC
OR I VE NUMBER
TRACK NUMBER
GET END I NG I NTERRUPT AND SENSE STATUS
WA I T FOR HEAD SETTLE
J29:
J30:
J31: J32: SEEK
PUSHF MOV CALL PUSH
MOV OR JZ
LOOP DEC JMP
POP POPF
RET ENDP
8)(,18 GET PARM CX -
CX,550 AH,AH J3I
J30 AH J29
ex
SAVE STATUS FLAGS GET HEAD SETTLE PARAMETER
SAVE REGISTER HEAD SETTLE I MS-LOOP TEST FOR TIME EXPIRED
DEL ... Y FOR 1 loiS DECREMENT THE COUNT DO I T SOME MORE
RECOVER STATE
SEEK ERROR RETURN TO CALLER
5-142 PC-XT System BIOS (11/08/82)
LOC OBJECT
EEC8 EEC8 51 EEC9 FA EECA E60C EECC 50 EECD 58 EECE E60B EEDO 8CCO EED2 B 104 EED4 D3CO EED6 8AE8 EED8 24FO EEDA 03C3 EEOC 1302 EEDE FECS EEEO EEEO 50 EEE 1 E604 EEE3 8AC4 EEE5 E604 EEE7 8AC5 EEE9 240F EEEB E681
EEED 8AE6 EEEF 2ACO EEFI DIE8 EEF3 50 EEF4 BB0600 EEF7 EB72FF EEFA BACC EEFC 5B EEFD D3EO EEFF 48 EFOO 50 EFO I E605 EF03 8AC4 EF05 E605 EF07 FB EFOB 59 EF09 58 EFOA 03CI EFOC 59 EFOD B002 EFOF E60A EF I I C3
EFI2 EFI2 EBIEOO
EFI5 7214
EFI7 8408
EF I 9 E825FF
EF I C E84AOO
EF IF 720A
EF21 A04200
EF24 2460
EF26 3C60
EF2B 7402
EF2A FB
EF28 EF28 C3 EF2C EF2C BOOE410040 EF31 F9 EF32 C3
LINE SOURCE 18105 FOR THE IBM PERSONAL COMPUTER XTI 11/08/82
2812 2BI3 2814 2815 2816 28\ 7 2818 2819 2820 2821
2B22 2B23 2824 2B25 2B26 2827 2B28 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2B47 2848 2849 2B50 2851 2852 2853
2854 2855 2856 2857
2B5B 2B59 2860 2B61 2B62 2863 2864 2865 2866 2867 2868 2869 2B70 2871
2B72 2873 2874 2B75 2876 2877 2878 2879 2880 2881 2882 2BB3 2884 2885 2886 2887 2888 28B9 2890 2891 2892 2893 2894
2B95 2B96 2897 2898 2899 2900 2901 2902
DMA SETUP
- THIS ROUTINE SETS UP THE DMA FOR READ/WRITE/VERIFY OPERATIONS.
INPUT
I AL ) = MODE BYTE FOR THE DMA
IES:BXI
ADDRESS TO READ/WRITE THE DATA
OUTPUT
-------IA-X--I -D--ES-T-R-O--YE-D-------------------------
DMA SETUP
-
PUSH
CL I
PROC CX
NEAR
SAVE THE REG I STER NO MORE INTERRUPTS
OUT
DMA+ 12, AL
SET THE FIRST/LAST F/F
PUSH
AX
POP
AX
OUT MaY
DMA+II,AL AX,ES
OUTPUT THE MODE BYTE GET THE ES VALUE
MaY ROL MaY
CL,4 AX,CL CH,AL
SH I FT COUNT ROTATE LEFT GET HIGHEST NYBlE OF ES TO CH
ANa ADO
AL,OFOH AX,BX
ZERO THE LOW NYBBLE FROM SEGMENT TEST FOR CARRY FROM ADDITION
JNC
J33
INC
CH
J33 :
PUSH
SAVE START ADDRESS
OUT
DMA+4,AL
OUTPUT LOW ADDRESS
MaY
AL,AH
OUT
DMA+4,AL
OUTPUT HIGH ADDRESS
MaY
AL,CH
GET HIGH 4 BITS
AND
AL,OFH
OUT
081H,AL
OUTPUT THE HIGH 4 81TS TO
THE PAGE REGISTER
DETERM I NE COUNT
MaY SUB SHR PUSH MDY CALL MDY PDP SHL DEC PUSH OUT MaY OUT STI POP POP AOO POP MaY OUT RET
DMA- SETUP
AH,DH AL,AL AX, I AX BX,6 GET PARM CL,AH AX AX,CL AX AX DMA+5,AL AL,AH DMA+5,AL
ex
AX AX,CX CX AL,2 DMA+IO,AL
ENDP
NUM8ER OF SECTORS TIMES 256 [NTO AX
SECTORS · 128 I NTO AX
GET THE BYTES / SECTOR PARM
USE AS SHIFT COUNT 10=128, 1=256 ETC)
MUL T I PL Y BY CORRECT - I FOR DMA VALUE SAVE COUNT VALUE LOW BYTE OF COUNT
AMOUNT
HIGH 8YTE OF COUNT INTERRUPTS BACK ON RECOVER COUNT VALUE RECOVER ADDRESS VALUE ADD, TEST FOR 64K OVERFLOW RECOVER REG I STER MODE FOR 8237 I NIT I AL I ZE THE 0 I SKETTE CHANNEL RETURN TO CALLER,
CFL SET BY ABOVE I F ERROR
CHK STAT 2
THIS ROUTINE HANDLES THE INTERRUPT RECEIVED AFTER A
RECALIBRATE, SEEK, OR RESET TO THE ADAPTER.
THE INTERRUPT IS WAITED FOR, THE INTERRUPT STATUS SENSED,
AND THE RESULT RETURNED TO THE CALLER.
INPUT
NONE
OUTPUT
CY 0 SUCCESS
CY = I FAilURE -- ERROR IS IN DISKETTE_STATUS
I AX I DES TROY ED
;-
CHK STAT 2 CALL JC
PROC
NEAR
WAIT INT
J34 -
'iliA 1T FOR THE INTERRUPT
I F ERROR, RETURN r T
MaY
AH,08H
SENSE [NTERRUPT STATUS COMMAND
CALL
NEC OUTPUT
CALL
RESOL TS
READ IN THE RESULTS
JC
J34
CHK2 RETURN
MaY
AL,NEC STATUS
GET THE F[RST STATUS BYTE
AND
AL,060H
ISOLATE THE BITS
CMP
AL,060H
TEST FOR CORRECT VALUE
J<
J35
IF ERROR, GO MARK IT
CLC
GOOD RETURN
J34:
RET
RETURN TO CALLER
J35:
CHK2_ERROR
OR
DISKETTE STATUS,BAD_SEEK
STC
ERROR RETURN CODE
RET
CHK STAT_2
ENDP
PC-XT System BIOS (11/08/82) 5-143
LOC OBJECT
EF33 EF33 F8 EF34 53 EF35 51 EF36 B302 EF38 33C9 EF3A EF3A F6063E0080 EF3F 750C EF41 E2F7 EF43 FECB EF45 75F3 EF41 800E410080 EF4C F9 EF40 EF40 9C EF4E 80263E007F EF53 90 EF54 59 EF55 58 EF5b C3
EF57 EF57 EF51 FB EF58 1E EFS9 50 EFSA E8FCOA EF5D 800E3E0080 EF62 B020 EF64 E620 EF6b 58 EF67 IF EFb8 CF
EF69 EF69 FC EF6A BF4200 EF6D 51 EF6E 52 EF6F 53 EF10 B307
EF72 EF72 33C9 EP14 BAF403 EF11 EF17 EC EF18 A880 EF1 A 150C EF7C E2F9 EF7E 800E410080 EF83 EF83 F9 EF84 5B EF85 5A EF86 59 EF81 C3
EF88 EF88 EC EF89 A840 EF8B 1507 EF8D EF8D 800E410020 EFn EBEF
EF94 EF94 42 EF95 EC EF96 8805 EF98 47 EF99 890AOO EF9C E2FE EF9E4A EF9F EC EFAO ABl0
LINE SOURCE IBIOs FOR THE IBM PERSONAL COMPUTER XTI 11 '06'62
2904 2905 2906
2901 2906 2909 2910 2911 2912 2913 2914 2915 2916 2917 29113 2919 2920 2921 2922 2923 2924 2925 2926 2921 2928 2929 2930 2931 2932 2933 2934 2935 2936 2931 2938 2939 2940 2941 2942 2943 2944 2945
WAIT INT
- THIS ROUTINE WAITS FOR AN INTERRUPT TO OCCUR. A TIME OUT
ROUTINE TAKES PLACE DURING THE WAIT, SO THAT AN ERROR MAY BE
RETURNED I F THE DR I VE IS NOT READY.
INPUT
NONE
OUTPUT
CY '" 0 SUCCESS CY = I FAILURE
DISKETTE 5 T ATUS I S SET ACCORD I NGL Y
I AX J DESTROYED
WAIT INT
-
STI
PUSH
PUSH
PROC
BX CX
NEAR
TURN ON INTERRUPTS, JUST IN CASE SAVE REGISTERS
J36:
"OV XOR
TEST .JNZ
BL,2 CX,CX
SEEK STATUS, INT FLAG
J37 -
-
CLEAR THE COUNTERS FOR 2 SECONO WA I T
TEST FOR INTERRUPT OCCURRING
LOOP DEC
J36 BL
COUNT DOWN WH I LE WA I T I NG SECOND LEVEL COUNTER
JNZ OR STC
J36 DISKETTE_STATU5,TIME_OUT
; NOTHING HAPPENED ERROR RETURN
J37:
PUSHF AND POF'F
SEEK_S T ATUS ,NOT I NT_FLAG
SAVE CURRENT CARRY : TURN OFF I NTERRUPT FLAG
RECOVER CARRY
POP
CX
POP
ex
RET
RECOVER REG I STERS GOOD RETURN CODE COMES
W.-A-IT---IN--T---- --E-N-D-P------
FROM TEST INST
-----------
; DISK INT
; INPUT TH I 5 ROUT I NE HANDLES THE D! SKETTE INTERRUPT
;
NONE
I OUTPUT
THE I NTERRUPT FLAG I S SET I S SEEK STATUS
2946 2941 2948 2949
2950 2951 2952 2953
2954 2955
2956 2957
2958 2959 2960 2961 2962 2963 2964
2965 2966 2961 2968 2969
2910 2911 2912 2913
2914 2975
2916 2917 29113 2919 2980 298 I
2982 2983
2984 2985 29136 2981 2988
2989 2990 2991 2992
2993
2994 2995 2996 2991 2998 2999 3000 3001
3002
3003 3004
3005 3006 3007 3008 3009 3010
3011 3012 3013 3014
3015 3016 3017 3018
3019
ORG
01 SK INT
-
STI
OEF51H PROC
; RE ENABLE rNTERRUPTS
PUSH
OS
PUSH
AX
CALL
ODS
OR
SEEK STATUS, INT FLAG
"OV
AL.20H
-
OUT
20H, Al
END OF I NTERRUPT MARKER INTERRUPT CONTROL PORT
POP
AX
POP
OS
RECOVER SYSTEM
IRET
RETURN FROM INTERRUPT
DISK INT
ENDP
; - - -=- - - ------ - - - - - - ------ - --- - - ------- - - - - - ------ - - --- -- --- --
; RESULTS
;
THIS ROUTINE WILL READ ANYTHING THAT THE NEC CONTROLLER HAS
;
TO SA Y FOLLOW I NG AN J NTERRUPT .
; INPUT
NONE
OUTPUT
= ° CY
= CY
SUCCESSFUL TRANSFER I FAILURE - TIME OUT IN WAITING FOR STATUS
NEe STATUS AREA HAS STATUS BYTE LOADED INTO IT
(AHT DESTROYED
~~SUl TS -;~;~-- - -~~;~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - ---
CLO
"OV PUSH PUSH PUSH OOV
DI,OFFSET
ex
OX BX Bl,1
NEC STATUS
-
POINTER TO DATA AREA SAVE COUNTER
MAX STATUS BYTES
- WA IT FOR REQUEST FOR MASTER
J3B: .J39:
J40:
XOR MOV
IN TEST JNZ LOOP OR
STC POP POP POP RET
ex ,ex
OX, 03F 4H
Al,DX Al, oaOH J40A J39 )ISKETTE
STATUS,TlME_OUT
ex
OX CX
INPUT lOOP COUNTER STATUS PORT WAIT FOR MASTER GET STATUS MASTER READY TEST DIR WAIT::::MASTER
RESULTS ERROR SET ERROR RETURN
TEST THE DIRECTION BIT
J40A: J41:
IN TEST JNZ
AL,DX AL,040H J42
OR JMP
DISKETTE_ST ATUS. BAD_NEC J40
IN THE STATUS
GET STATUS REG AGAIN TEST DIRECTION BIT OK TO READ STATUS
- NEC FAil
RESUL TS_ERROR
J42; J43:
INC IN MOV INC
"OV lOOP DEC IN TEST
OX AL,DX
{DI1.AL 01
CX,IO J43 OX AL,DX AL,010H
INPUT STAT POINT-AT DATA PORT GET THE DATA
STORE THE BYTE INCREMENT THE PO INTER LOOP TO K J Ll TIME FOR
NEC
POINT AT STATUS PORT GET STATUS TEST FOR NEe STILL BUSY
5-144 PC-XT System BIOS (11/08/82)
LOC OBJECT
EFA2 1406 EFA4 FECB EFA6 15CA EFA8 EBE3
EFAA EFAA 5B EFAB 5A EFAC 59 EFAO C3
EFAE EFAE A04S00 EFBI 3ACS EFB3 A04700 EFB6 140A EFB8 BB0800 EFBB E8AEFE EFBE 8AC4 EFCO FECO EFC2 EFC2 2AC 1 EFC4 C3
EFC1 EFC1 EFC1 CF EFC8 02 EFC9 25 EFCA 02 EFCB 08 EFCC 2A EFCD FF EFCE 50 EFCF F6 EFDO 19 EFDI 04
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER Xli 11/08/82
3020 3021 3022 3023 3024 3025 3026 3021 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3041 3048 3049 3050
3051 3052 3053 3054 3055 3056 3051 3058 3059 3060 3061
JZ DEC JNZ JMP
J44
BL J38 J41
RESULTS DONE DECREMENT THE STATUS GO BACK FOR MORE CHIP HAS FAILED
COUNTER
;----- RESULT OPERATION IS DONE
..144:
PDP
BX
POP
OX
POP
CX
; RECOVER REGISTERS
; - - - - ---R-E-T---- - - - --------------- - --
: GOOD RETURN CODE FROM TEST
; NUM TRANS
- TH I S ROUT I NE CALCULATES THE NUMBER OF SECTORS THAT
WERE ACTUALLY TRANSFERRED TO/FROM THE DISKETTE
INPUT
(CHI:: CYLINDER OF OPERATION
(CL) " START SECTOR OF OPERA T I ON
OUTPUT
(ALl ::; NUMBER ACTUALLY TRANSFERRED
NO OTHER REGISTERS MODIFIED
~~~ - ~~~~;------- ~R~~ - ---~~~; - - - - - -- - - -- -
INST
-
MOV
AL,NEC STATUS+3
GET CYL INDER ENDED UP ON
CMP
AL,CH -
SAME AS WE STARTED
MOV JZ
AL,NEC STATUS+5 J45-
GET ENDING SECTOR I F ON SAME CYL, THEN NO ADJUST
MOV CALL
BX,8 GET PARM
GET EaT VALUE
MOV
AL ,AH
INTO AL
INC
AL
I USE EOT+1 FOR CALCULATION
J45:
SUB
AL,CL
SUBTRACT START FROM END
RET
NUM TRANS
ENDP
----- RESiJL TS ENDP
;
--------- -----
; DISK BASE
;
- THIS ]S THE SET OF PARAMETERS REQUIRED FOR DISKETTE OPERATION.
;
THEY ARE POINTED AT BY THE DATA VARIABLE DISK POINTER. TO
;
MODIFY THE PARAMETERS, BUILD ANOTHER PARAMETER BLOCK AND POINT
3062 3063 3064 3065 3066 3067 3068 3069 3010 3011 3012 3013 3014 3015 3076 3011
;
DISK_POINTER TO IT.
1----- - ------ - - - - -------- - -
ORG
OEFC1H
DISK BASE
-
DB
LABEL BYTE 1100 1111B
DB
2
DB
MOTOR WAI T
DB
2
DB
8
08
02AH
DB
OFFH
DB
050H
DB
OF6H
DB
25
DB
4
--- - -------- - - ------------------- - - - - - ----
SRT=C. HD UNLOAD=OF - 1ST SPECIFY BYTE HD LOAD= I. MODE=DMA - 2ND SPEC I FY BYTE WAIT AFTER OPN TIL MOTOR OFF 512 BYTES/SECTOR EOT ( LAST SECTOR ON TRACK)
GAP LENGTH
OTL
GAP LENGTH FOR FORMAT
F ILL BYTE FOR FORMAT
HEAD SETTLE T I ME (M I LL I SECONDS)
MOTOR START TIME 11/8 SECONDS I
PC-XT System BIOS (11/08/82) 5-145
LOC 08JECT
EFD2 EFD2 EFD2 FB EFIJ3 IE EFD4 52 EF05 56 EF06 51 EFOl 53 EF08 E81EOA EFOB BBF2 EFOO 8ASC18 EFEO 0lE6 EFE2 885408 EFES 0802
EFEl H·OC EFE9 OAE4 EFES 740E EFED FECC EFEF 143F EFF I FECC EFF3 1428 EFF5 EFF5 58 EFF6 59 EFFl 5E EFF8 5A EFF9 IF EFFA CF
EFFB EFFB 50 EFFC EE EFFO 42 EFFE EFFE 2BC9 FOOO FOOO EC FOO I BAED F003 AB8D FOD5 150E FOOl E2F1 F009 FEeB FODB 1SFI FOOD eoccO I FO 10 80E4F9 FOl3 E813 FO 15 FOl5 BOOO Fa 11 42 Fa 18 EE FOl9 BOaC FO IB EE FO IC 58
FO 10 FO 10 50 FOIE FOIE 8B5408 F02! 42 F022 EC F023 8AEO F025 8aE4F8 F02e F02e 5A F029 8AC2 F02B eOF448 F02E EBC5
LINE
3018 3019 3080 3081 3082 3083 3084 3085 3086 3081 3068 3089 3090 3091 3092 3093 3094 3095 3096 3091 3098 3099 3100 3101 3102 3103 3104 3105 3106 3101 3108 3109 3110 311 I 3112 3113 3114 3115 3116 31 11 3118 3119
3120 3121 3122 3123 3124 3125 3126 3121 3128 3129 3130 3131 3132 3133 3134 3135 3136 3131 3138 3139
3140 3141 3142 3143 3144 3145 3146 3141 3148 3149 3150 3151 3152 3153 3154 3155 3156 3151 3158 3159 3160 3161 3162 3163 3164 3165 3166 3161 3168 3169 3110 3111 3112 3113 3114 3115 3116 3111 3118 3119 3180 3181 3182
SOURCE IBIOS FOR THE IB~ PERSONAL COMPUTER XT) 11/08/82
;--- INT 17 ------ ------------- ----------- __ ----- ______ _
; PRINTER 10
,,,,;;
INPUT
THIS ROUTiNE PROVIDES CO~~UNICATION WITH THE PRINTER
r AHI =0
= (AHl I
PR I NT THE CHARACTER I N I AL I ON RETURN, AH=! I F CHARACTER COULD NOT BE PR I NTED
!TIME OUT). OTHER BITS SET AS ON NORMAL STATUS CALL INITIALIZE THE PRINTER PORT
RETURNS WITH (AHI SET WITH PRINTER STATUS {AH) =2 READ THE PRINTER STATUS INTO IAHI
1
6
5
<4
3
2-1 0
I
I
I
I
I
I
I_TIMEOUT
I
I
I
I
I
1_ UNUSED
I
I
I
I
1_ 1 " I 10 ERROR
I
I
I
I I" SELECTED
I
1
1_ I " OUT OF PAPER
I
I I " ACKNOWLEDGE
1_ I " NOT BUSY
{OX) = PRINTER TO BE USED {O, j ,2) CORRESPONDING TO ACTUAL VALUES IN PRINTER_BASE AREA
OAT A AREA PR I NTER SASE CONTA I NS THE SA SE ADDRESS OF THE PR INTER CAROlS) AVAILABLE-~LOCATED AT BEGINNING OF DATA SEGMENT, 406H ABSOLUTE, 3 WORDS)
DATA AREA PRINT TIM OUT (BYTE I MAY BE CHANGED TC CAUSE DIFFERENT TIME-OUT WAITS.-OEFAULT::20
REGI STERS
AH IS MODIFIED ALL OTHERS UNCHANGED
ASSUME ORC PR[NTER 10 -STI
PUSH PUSH PUSH PUSH PUSH
CALL
"OV "OV SHL HOV OR
CS: CODE, OS: OA T A
OEFD2H
PROC
FAR
os
OX
51
CX BX
DDS
SI,DX
BL,PRINT TIM OUT[SI]
SI · I
-
g~:6~INTER_BASEISI ]
BI:
JZ OR JZ DEC JZ DEC JZ
POP PDP PDP POP POP IRET
BI AH,AH B2 AH B6 AH B5
BX CX 5 I ox DS
INTERRUPTS BACK ON SAVE SEGMENT
GET PR [NTER PARM LOAD T I ME -OUT PAR~ WORO OFFSET INTO TABLE GET BASE ADDRESS FOR PR[NTER CARD TEST OX FOR ZERO,
INDICATING NO PRINTER RETURN TEST FOR (AHI"O PRINT AL TEST FOR lAHI=1 INIT PRT TEST-FOR (AH) =2 PRINTER STATUS RETURN
RECOVER REG I STERS RECOVER REGISTERS
---- PRINT THE CHARACTER IN (AU
B2: B3:
PUSH OUT INC
SUB
AX OX ,AL ox
CX ,CX
IN OOV
AL,DX AH,AL
TEST
AL ,60H
JNZ
B.
LOOP DEC
-B3 I
BL
JNZ
83
DR
AH, I
AND
AH,OF9H
J"P
SHORT B7
84:
OOV
AL ,ODH
INC
ox
OUT
OX ,AL
"OV
AL ,OCH
OUT
DX,AL
POP
AX
;------ PRINTER STATUS
SAVE VALUE TO PRINT OUTPUT CHAR TO PORT POINT TO STATUS PORT
WAIT_BUSY
GET STATUS STATUS TO AH ALSO IS THE PRINTER CURRENTLY BUSY OUT STROBE TRY-AGA IN DROP LOOP COUNT GO TILL TIMEOUT ENDS SET ERROR FUG TURN OFF THE OTHER BITS RETURN WITH ERROR FLAG SET OUT STROBE SET-THE STROBE HiGH STROBE IS BIT 0 OF PORT C OF 8255
SET THE STROBE LOW
RECOVER THE OUTPUT CHAR
B5: B6:
B1:
PUSH
"OV INC IN "DV AND
POP HOV XOR JOP
AX
OX, PR INTER_BASE (S I] OX AL,DX AH,AL AH,OF6H
OX AL,DL AH.48H 81
SAVE AL REG
GET PRINTER STATUS
TURN OFF UNUSED BI TS STATUS SET RECOVER AL REG GET CHARACTER INTO AL FLIP A COUPLE OF B[TS RETURN FROM ROUT I NE
5-146 PC-XT System BIOS (11/08/82)
LOC OBJECT
/"'""""\
F030 F030 50 F031 42 F032 42 F033 8008 F035 EE F036 88E803 F039 F039 48 F03A 75FO F03C 800C
F03E EE FQ3F E8DD
LINE SOURCE (BIOS FOR THE I BM PERSONAL COMPUTER XTI 1 1/08/82
3183 3184 3185 3186 3187 3188 3189 3190 3191 3 I 92 3193 31943195 3196 3197 3198 3199 3200 320 I
INITIALIZE THE PRINTER PORT
88: 89:
PUSH INC INC "OV OUT "OV
OEC JNZ MOV
AX OX OX AL,8 OX,AL AX,IOOO
AX 8. AL,OCH
OUT JMP PR INTER- 10
DX,AL 86
ENDP
SAVE AL POINT TO OUTPUT PORT
SET INIT LINE LOW
INIT LOOP LOOP-FOR RESET TO T AI<.E INIT LOOP NO INTERRUPTS, NON AUTO LF,
INIT HIGH
PRT- STATUS- I
PC-XT System BIOS (11/08/82) 5-147
LOC 08JECT
LINE SOURCE 18105 FOR THE I Bioi PERSONAL COMPUTER XT t i l / 08/82
3202
3203
3204 3205 3206 3201 3208 3209 32(0 321 I 3212 3213 3214 3215
321 b 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3221 3228 3229 3230 3231 3232 3233
3234 3235 3236 3231 3238 3239 3240 3241 3242 3243
3244 3245 3246 3247 3248 3249 3250
3251 3252 3253 3254 3255
3256 3251
3258 3259 3260 3261
3262 3263 3264 3265 3266 3261 3268 3269 3270 3211 3212 3213 3214 3215 3276 3211 3218 3219 3280 3281 3282 3283 3284 3285 3286 3281
3288 3289 3290 3291 3292 3293 3294 3295 3296 3291 3298 3299 3300 3301 3302 3303 3304 3305 3306 3301 3308 3309 3310 3311 3312 3313
--- tNT 10 -- ----------------------------- ______ _
V IDEO 10
-THESE ROUT I NES PROV I DE THE CRT INTERFACE
THE FOLLOWING FUNCTIONS ARE PROVIDED:
(AH):;O SET MODE (AL I CONTAINS MODE VALUE
(ALI=O 40X25 8'11' (POWER ON DEFAULT)
(ALI=( 40X25 COLOR
(AL)=2 80X25 BW
(AL) =3 80X25 COLOR
GRAPHICS MODES
(AL) =4 320X200 COLOR
(AL)_5 320X200 BW
iAL)=b 640x200 BW
CRT MODE=1 80X25 8&'11' CARD I USED 1NTERNAL TO V IDEO ONL Y I
··· NOTE 8W MODES OPERATE SAME AS COLOR MODES, aUT
COLOR BURST IS NOT ENABLED
IAHI =1 SET CURSOR TYPE
(CHI
BITS 4-0 = START LINE FOR CURSOR
·· HARDWARE WILL ALWAYS CAUSE BLiN
·· SETTING 81T 5 OR 6 WILL CAUSE ERRATIC
BLINKING OR NO CURSOR AT ALL
(CU = 81TS 4-0 = END LINE FOR CURSOR
IAH):;2 SET CURSOR POSITION
(cH,DU :; ROW,COLUMN (0,0) IS UPPER LEFT
IBH) :; PAGE NUMBER (MUST BE 0 FOR GRAPHICS MODES I
IAH)=3 READ CURSOR POSITION
IBHI = PAGE NUMBER (MUST BE 0 FOR GRAPHICS MODES)
ON EXIT (DH,DLI = ROW,COLUMN OF CURRENT CURSOR
(CH,CLI :; CURSOR MODE CURRENTLY SET
(AHI =4 READ LIGHT PEN POSITION
ON EXIT:
IAHI = 0 -- LIGHT PEN SWITCH NOT DOWN/NOT TRIGGERED
IAHI = 1 -- VALID LIGHT PEN VALUE IN REGISTERS
(QH,DLI = ROW,COLUMN OF CHARACTER LP POSN
ICH) = RASTE;R LINE (0-1991
(BX) = PIXEL COLUMN (0-319,6391
IAH)=5 SELECT ACTIVE DISPLAY PAGE lVALID ONLY FOR ALPHA MODES I :
(ALl =NEW PAGE VAL {0-1 FOR MODES 0&1, 0-3 FOR MODES 2&31:
I AH) =6 SCROLL ACT I 'olE PAGE UP
I AL I :; NUMBER OF LINES, INPUT LINES BLANKED AT BOTTOM
OF WINDOW
I AH I = 1
AL = 0 MEANS BLANK ENT I RE WI NDOW
(CH,CLI ROW,COLUMN OF UPPER LEFT CORNER OF SCROLL
{QH,DLI = ROW,COLUMN OF LOWER RIGHT CORNER OF SCROLL
(BH I = ATTR I BUTE TO BE USED ON BLANK LINE
SCROLL ACT I VE PAGE DOWN
I ALl = NUMBER OF LINES, INPUT LINES BLANKED AT TOP
OF WI NDOW
AL = 0 MEANS BLANK ENT I RE WI NOOW
ICH,CLl " ROW,COLUMN OF UPPER LEFT CORNER OF SCROLL
IDH,DLI = ROW,COLUMN OF LOWER RIGHT CORNER OF SCROLL
IBH) = ATTRIBUTE TO BE USED ON BLANK LINE
CHARACTER HANDL I NG ROUT I NES
= 8 READ ATTRIBUTE/CHARACTER AT CURRENT CURSOR POSITION
IBH) = DISPLAY PAGE (VALID FOR ALPHA MODES ONLY)
ON EX IT:
(AL) " CHAR READ
(AHI = ATTRIBUTE OF CHARACTER READ (ALPHA MODES ONLn
IAH)
9 WRITE ATTRIBUTE/CHARACTER AT CURRENT CURSOR POSITION
= (BHI
0 I SPLAY PAGE I VAL 1D FOR ALPHA MODES ONLY I
{CXI = COUNT OF CHARACTERS TO WRITE
(ALI = CHAR TO ,.RITE
(BLI = ATTRIBUTE OF CHARACTER (ALPHAI/COLOR OF CHAR
(GRAPHICSI
SEE NOTE ON WR 1TE DOT FOR BIT 7 OF BL = I.
(AHI '" 10 WRITE CHARACTER ONLY AT CURRENT CURSOR POSITION
IBH! = DISPLAY PAGE (VALID FOR ALPHA MODES ONLY)
= ICX! = COUNT OF CHARACTERS TO WRI1E
(ALl CHAR TO WRITE
FOR READ/WRITE CHARACTER INTERFACE WHILE IN GRAPHICS MODE, THE :
CHARACT!::RS ARE FORMED FROM A CHARACTER GENERATOR IMAGE
MAINTAINED 'IN THE SYSTEM ROM. ONLY THE 1ST 128 CHARS
ARE CONTA I NED THERE. TO READ/WR, TE THE SECOND 128
CHARS, THE USER MUST INITIALIZE THE POINTER AT
INTERRUPT lFH (LOCATION 0001CH) TO POINT TO THE IK BYTE
TABLE CONTAINING THE CODE POINTS FOR THE SECOND
128 CHARS 1128-2551.
FOR WRITE CHARACTER INTERFACE IN GRAPHICS MODE, THE REPLICATION
FACTOR CONTAINED IN ICXI ON ENTRY WILL PRODUCE VALID
RESULTS ONLY FOR CHARACTERS CONTAINED ON THE SAME ROW.
CONTINUATION TO SUCCEEDING LINES WILL NOT PRODUCE
CORRECTL Y ·
GRAPHICS INTERFACE
{AH I " I I SET COLOR PALET1E
IBHI = PALETTE COLOR 10 8EING SET (0-1211
18LI = COLOR VALUE TO BE USED WITH THAT COLOR 10
NOTE: FOR THE CURRENT COLOR CARD, THIS ENTRY POINT
HAS MEANING ONLY FOR 320X200 GRAPHICS.
I
COLOR I D = 0 SELECTS THE BACKGROUND COLOR (0-15 I :
COLOR I D = 1 SELECTS THE PALETTE TO BE USED:
0 = GREENII)/REDI2){YELLOW(31
I -" CYAN! 11/MAGENTA(2) /WHITE13!
IN 40X25 OR 80X25 ALPHA MODES, THE VALUE SET
FOR PALETTE COLOR 0 INDICATES THE
BORDER COLOR 10 BE USED I VALUES 0-31,
WHERE 16-31 SELECT THE HIGH INTENSITY
BACKGROUND SET.
(AHI
12 WRITE DOT
= lOX) ROW NUMBER
(CX! ;; COLUMN NUMBER
(ALI " COLOR VALUE
IF BIT 7 OF AL " I, THEN THE COLOR VALUE IS
EXCLUSIVE OR'O WITH THE CURRENT CONTENTS OF
THE DOT
IAH)
13 READ DOT
(OX) = ROW NUMBER
(CX I :; COLUMN NUMBER
(AL) RETURNS THE DOT READ
5-148 PC-XT System BIOS (11/08/82)
LOC OBJECT
F045 F045 F045 FCFO F041 CDF 1 F049 EEF 1 F048 39F2 F04D 9CF7 F04F 11F2 F051 96F2 F053 38F3 F055 74F3 F057 B9F3 F059 ECF3 F05B 4EF2 F05D 2FF4 F05F I EF4 F061 I 8F 1 F063 74F2
0020
F065 F065 F065 FB F066 Fe F067 06 F068 IE F069 52 F06A 51 F06B 53 F06C 56 F06D 57 F06E 50 F06F 8AC4 F011 32E4 FOB OlEO F015 8BFO F077 302000 F07A 1204 F01C 58 F07D E9450 I F080 F080 E8D609 F083 B80088 F086 8B3E I 000 F08A 81E13000 F08E 83FF30 F091 1502 F093 B4BO F095 F095 8ECO F091 58 F098 8A264900 F09C 2EFF A445FO
LINE SOURCE (BIDS FOR THE IBM PERSONAL COMPUTER XTl 11/08/82
3314 3315 3316 3311 3318 3319 3320 3321 3322 3323 3324 3325 3326 3321 3328 3329 3330 333 I 3332 3333 3334 3335 3336 3331 3338 3339 3340 3341 3342 3343 3344 3345 3346 3341 3348 3349 3350 3351 3352 3353 3354 3355 3356 3351 3358 3359 3360 3361 3362 3363 3364 3365 3366 3361 3368 3369 3310 337 I 3312 3373 3374 3375 3376 3377 3318 3319 3380 3381 3382 3383
3384 3385
ASC I I TELETYPE ROUT I NE FOR OUTPUT
(AHI
= 14 WRITE TELETYPE TO ACTIVE PAGE
IALl = CHAR TO WRITE
(BLl FOREGROUND COLOR IN GRAPHICS MODE
NOTE - - SCREEN WIDTH I S CONTROLLED BY PREV 10US
MODE
SET
(AHI
15 CURRENT VIDEO STATE
RETURNS THE CURRENT VIDEO STATE
= I AL I
I AH)
MODE CURRENTLY SET I SEE AH=O FOR EXPLANAT I ON ) NUMBER OF CHARACTER COLUMNS ON SCREEN
IBH) = CURRENT ACT! VE D 1SPLA Y PAGE
CS,SS,DS,ES,BX,CX,DX PRESERVED DURING CALL ALL OTHERS DESTROYED
MIL
ASSUME
ORG
LABEL DW DW DW DW DW DW DW DW DW DW DW DW DW DW DW DW EoU
CS:CODE,DS:DATA,ES:VIDEO RAM
OF045H
-
WORD
; TABLE OF ROUTINES WITHIN VIDEO I/O
OFFSET SET MODE
OFFSET SET-CTYPE
OFFSET SET-CPOS
OFFSET READ CURSOR
OFFSET REAO-LPEN
OFFSET ACT DISP PAGE
OFFSET SCROLL UP
OFFSET SCROLL-DOWN
OFFSET READ AC CURRENT
OFFSET WR I TE AC CURRENT
OFFSET WR I TE-C CURRENT
OFFSET SET COL5R
OFFSET WR ('FE DOT
OFFSET READ 50T
OFFSET WRITE TTY
OFFSET V IDEO::::STATE
I-M!
ORG VIDEO_l0
STI CLD PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH
MO' XDR SAL
MD' CMP JB PDP JMP M2: CALL MOV MOV AND eMP JNE
MO'
MO' POP MDV JMP VIDEO_l0
OF065H
PROC
NEAR
ES OS DX ex BX 51 DI AX
AL,AH AH,AH AX,! 51 ,AX
AX,MIL M2 AX
V IDEO_RETURN
I NTERRUPTS BACK ON SET DIRECTION FORWARD
SAVE SEGMENT REGISTERS
SAVE AX VALUE GET 1NTO LOW BYTE ZERO TO HIGH BYTE ·2 FOR TABLE LOOKUP PUT INTO S J FOR BRANCH TEST FOR WITHIN RANGE BRANCH AROUND BRANCH THROW AWAY THE PARAMETER 00 NOTHING IF NOT IN RANGE
DDS AX,OB800H DI,EQUIP FLAG DI,30H -
OJ ,30H
M'
AH,OBOH
SEGMENT FOR COLOR CARD GET EQU I PMENl SETT I NG ISOLATE CRT SWITCHES 1S SETl I NG FOR Bill' CARD?
SEGMENT FOR Bill' CARD
ES,AX
SET UP TO POINT AT VIDEO RAM AREAS
AX
RECOVER VALUE
AH,CRT MODE
GET CURRENT MODE INTO AH
WORD PRT CS: [s I +QFFSET M I
ENDP
PC-XT System BIOS (11/08/82) 5-149
LOC OBJECT
FOA4 FOA4
FOA4 38 FOA5 28 FOA6 20 FOAl OA FOA8 IF FOA9 06 FOAA 19 FOAB I C FOAC 02 FOAD 01 FOAE 06 FOAF 01 FOBO 00 FOBI 00 FOB2 00 FOB3 00
00 I a
FOB4 71 FOB5 50 FOB6 5A FOBl OA FOB8 IF FOB9 06 FOB A 19 FOBB 1C FOSC 02
FOBD 07 FOBE 06 FOBF 07 FOCO 00 FOC I 00 Foe2 00 FOC3 00
FOC4 38 FOC5 28 FOC6 20 FOCl OA FOC8 IF FOC9 06 FOCA 64 FOCB 70 Face 02 FOCD 01 FOCE 06 FOCF 07 FODO 00 FOOl 00 F002 00 FOD3 00
FOQ4 61 FOD5 50 F006 52 FOOl OF F008 19 F009 06 FOOA 19 FODB 19 FOOC 02 FOOD 00 FODE OB FODF OC FOEO 00 FOE I 00 FOE2 00 FOE3 00
FOE4
FQE4 FOE6 FOE8 FOEA
00Q8 0010 0040 0040
FOEC FOEC 28 FOED 28 FOEE 50 FOEF 50 FOFO 28 FOFI 28 FOF2 50 FOF3 50
FOF4 FOF4 2C FOF5 28 FOF6 20 FOFl 29 FOF8 2A FOF9 2E FOFA IE
FOFB 29
LINE
3366 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3391 3398 3399 3400 340 I
SOURCE ~BIOS FOR THE IBM PERSONAL COMPUTER XTI 11/08/82
SET MODE
- THIS ROUTINE INITIALIZES THE ATTACHMENT TO THE SELECTED MODE. THE SCREEN I S BLANKED.
INPUT
(AL) " MODE SELECTED (RANGE 0-9) OUTPUT
NONE
;----- TABLES FOR USE IN SETTING OF MODE
ORG
OFOA4H
VIDEO PARMS
LABEL BYTE
- lNIT TABLE
DB
38H,28H,20H,OAH.1FH,6.19H
SET UP FOR 40)(25
3402
DB
ICH,2,7,b.7
3403
3404 M4 3405 340b
DB
EQU DB
0, 0.0,0 I1H,50H.5AH.OAH.IFH.6.19H
SET UP FOR 80X25
3401
3408 3409 3410
DB
ICH,2.7,b,7
DB
0,0, 0,0
DB
38H. 28H. 2DH. OAH I IFH, b, 64H
SET UP FOR GRAPHICS
3411
3412
3413 3414
DB
10H,2,I,b.7
0,0,0,0
DB
bIH.50H,52H,OFH,19H,6.19H
SET UP FOR 80)(25 B&W CARD
3415
DB
19H,2 ,OOH. OBH, OCH
3416
., 3411
3418 3419 3420 3421 3422 3423 3424 3425 3426 M6 3421
DB
0,0.0.0
LABEL
ow ow ow ow
WORD 2048 4096 16384 16384
COLUMNS
LABEL DB
BYTE 40,40,80,80,40,40,80 .80
TABLE OF 40X25 80X25 GRAPHI CS
REGEN
LENGTHS
3428 3429 3430 3431 1041 3432
- C_REG TAB
LABEL DB
BYTE
; TABLE OF MODE SETS
2CH,28H,20H.29H,2AH.2EH,IEH.29H
5-150 PC-XT System BIOS 01/08/82)
LOC 08,JECT
FOFC FOFC 8AD403 FOFF B300 FlO I 83FF30 FI04 1506 F I 06 B001 FI08 B2B4 FIOA FEC3 FlOC FlOC 8AEO FlOE A24900 FI I I 89166300 F 115 IE FI 16 50 FI 11 52 F 118 83C204 F 118 8AC3 FI 10 EE F I IE 5A FI IF 2BCO F 121 8ED8
F 123 C51E1400 F 121 58
FI28891000 F 128 80FC02 F 12E 1210 F 130 0309 F 132 80FC04 FI35 7209 FI37 0309 FI39 80FC01 FI3C 1202 F 13E 0309
FI40 FI40 50 F 141 32E4
F 143 F 143 8AC4 F 145 EE FI46 42 FI41 FEC4 FI49 8A07 FI48 EE FI4C 43 F 140 4A FI4E E2F3 FI50 58 FI51 IF
F 152 33FF F 154 893E4EOO FI58 C606620000 FI5D 890020 FI60 80FC04 FI63 7208 F 165 80FC01 FI68 1404 F 16A 33CO FI6C E805 FI6E FI6E 8508 FI10 FI70 882001 FI73 FI13 F3 FI74 A8
FI75 FI18 FI7E FI80 FI82
C10660000706 A04900 32E4 88FO 88166300
FI86 F I 89 FI8E F I 8F
83C204 2E8A84F4FO EE A26500
F 192 2E8A84ECFO FI97 32E4 F 199 A34AOO
FI9C 81E60EOO F I AO 2E888CE4FO F IA5 890E4COO F IA9 890800 F I AC 8F5000 F IAF IE F 180 01 F IBI 33CO F 183 F3 F 184 AB
LINE SOURCE I B J OS FOR THE [B~ PERSONAL CO~PUTER XT I I 1 108/82
3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3441 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3413 3474 3415 3476 3411 3478 3479 3480 3481 3482 3483 3484 3485 3486 3481 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510
SET MODE
-
MOV
MOV
C"P JNE
"OV
~8:
"OV INC
"OV MOV
"OV PUSH
PUSH
PUSH
AOO
"OV OUT
POP
SUB
"OV ASSUME
LOS
POP ASSUME
"OV C"P JC
AOO
e"p Je
AOO
C"P JC
AOO
PROC
NEAR
DX,03D4H
BL,O
DI,30H
M8
AL,7
DL,OB4H
BL
AH,AL CRT MODE, AL ADDR 6845,DX
as
AX OX
DX,4 AL ,BL
ox ,AL
OX AX ,AX
OS ,AX DS:ABSO
8X, PARM PTR
AX
-
DS:CODE CX,M4 AH,2
"9 aX,ex
AH,4
"9
BX,CX
AH,7
"9
BX ,ex
ADDRESS OF COLOR CARD MODE SET FOR COLOR CARD IS BW CARD INSTALLED OK WITH COLOR I NO I CA TE BW CARD MODE ADDRESS OF BW CARD 1384) MODE SET FOR 8W CARD
SAVE MODE IN AH SAVE IN GLOBAL VARIABLE SAVE ADDRESS OF BASE SAVE POINTER TO DATA SEGMENT SAVe: MODE SAVE OUTPUT PORT VALUE PO I NT TO CONTROL REG I STER GET MODE SET FOR CARD RESET V IDEO BACK TO BASE REG I STER SET UP FOR ABSO SEGMENT ESTABLISH VECTOR TABLE ADDRESSING
GET POINTER TO VIDEO PARMS RECOVER PARMS
LENGTH OF EACH ROW OF TABLE DETERM I NE WH I CH ONE TO USE MODE IS 0 OR I MOVE TO NEXT ROW OF IN ITT ABLE
MOOEIS20R3 MOVE TO GRAPHICS ROW OF INIT_TABLE
MODE IS 4,5, OR 6 MOVE TO BW CARD ROW OF I NIT_TABLE
BX POINTS TO CORRECT ROW OF INITIALIZATION TABLE
1049:
PUSH XOR
AH,AH
OUT INIT SAVE MODE IN AH AH WILL SERVE AS REGISTER
NUMBER OUR I NG LOOP
LOOP THROUGH TABLE, OUTPUTTT I NG REG ADDRESS, THEN VALUE FROM TABLE
MIO:
"OV OUT INC INC
"OV OUT INC
OEC LOOP POP POP ASSUME
AL,AH OX ,AL
OX AH AL, (BX) DX,AL BX OX
"10 AX DS DS:OATA
INIT LOOP ; GET 6845 REGISTER NUMBER
; POINT TO DATA PORT ; NEXT REGISTER VALUE
GET TABLE VALUE OUT TO CHIP NEXT IN TABLE BACK TO PO I NTER REG I STER DO THE WHOLE TABLE GET MODE BACK RECOVER SEGMENT VALUE
FILL REGEN AREA WITH BLANK
10411: 10412: 1.113:
XOR "OV MOV "OV
e"p
JC C"P JE XOR J"P
"OV
REP
01,01 CRT START ,01 ACTIVE PAGE, 0 CX,8192 AH,4
"'2
AH,7
""AX,AX
SHORT 10413
CH,08H
STOSW
SET UP PO 1NTER FOR REGEN START ADDRESS SAVED IN GLOBAL SET PAGE VALUE NUMBER OF WORDS 1N COLOR CARD TEST FOR GRAPHICS NO GRAPHICS INIT TEST FOR BW-CARD 8W CARD INIT FILL FOR GRAPHICS MODE CLEAR 8UFFER 8W CARD INiT 8UFFER 5 I ZE ON BW CARD NO GRAPHICS INIT FILL CHAR FOR ALPHA CLEAR BUFFER FILL THE REGEN BUFFER WITH BLANK S
3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542
ENABLE VIDEO AND CORRECT PORT SETTING
"OV "OV XOR "OV "OV
AOO "OV OUT "OV
CURSOR MODE,607H AL ,CRT-MODE AH, AH -
SI,AX OX, ADDR_6845
DX,4 AL,CS:[SI+OFFSET DX,AL CRT_MODE_SET ,AL
M1)
SET CURRENT CURSOR MODE GET THE MODE
INTO AX REGISTER T ABLE PO INTER, I NDEXED BY PREPARE TO OUTPUT TO
V IDEO ENABLE PORT
MODE
SET V IDEO ENABLE PORT SAVE THAT VALUE
---- DETERMINE NUMBER OF COLUMNS, 80TH FOR ENTIRE DISPLAY AND THE NUMBER TO BE USED FOR TTY INTERFACE
"OV XOR
AL,CS:[SI+OFFSET 1.16)
AH,AH CRT_eOLS,AX
NUt.4BER OF COLUMNS IN TH I S SCREEN
SET CURSOR POSITIONS
"OV "OV "OV "OV PUSH POP
XOR REP
S I ,OEH CX,CS:(SI+OFFSET M5j CRT LEN ,CX CX,S
0as1, OFFSET CURSOR - POSN
ES AX,AX STOSW
WORO OFFSET INTO CLEAR LENGTH TABLE
LENGTH TO CLEAR
SAVE LENGTH OF CRT
NOT USED FOR BW
CLEAR ALL CURSOR POS I T IONS
ESTA8LISH SEGMENT ADDRESS I NG
FILL WITH ZEROES
PC-XT System BIOS (11/08/82) 5-151
LOC 08JECT
F 185 42 FI86 B030
FI88 FIBD FI8F FICI FIC I F I C2
803E490006 7502 B03F
EE A26bOO
FIC5 F I C5 5F F I C6 5E Fle1 58 Fle8 F I C8 59 F I C9 5A FICA IF Fle8 01 F I CC CF
FICO FICO F 1CF FI03 F 106
8<4-0A 890EbOOO E80200 E8EO
FID8 Fl0888166300 FlOC 8AC4 FIDE EE FIOF 42 FIEO 8AC5 FI E2 EE F I E3 4A FIE4 8AC<4 FIE6 FECO F IE8 EE F I E9 42 FlEA 8ACI F I EC EE FI ED C3
FlEE FlEE 8ACF FIFO 32EO FIF2 DIE 1 FIF4 88FI FIF6 895450 F I F9 383E6200 FIFO 7505 FIFF 88C2 F20 I E80200 F204 F204 EBBF
F206 F206 E81COO F209 88C8 F208 030E4EOO F20F 0lF9 F211 840E F213 E8C2FF F216 C3
LINE SOURCE (8105 FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
3543 3544 3545 3546 3541 3548 3549 3550 3551 3552 3553 3554 3555 3556 3551 3558 3559 3560 3561 3562 3563 3564 3565 3566 3561 3568 3569 3510 351 I 3512 3573 3514 3515 3576 3511 3518 3519
3580 3581 3582 3583 3584
3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3591 3598 3599 3600 360 I 3602 3603 3604 3605 3606 3607 3608 3609 3610 361 I 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 363 I 3632 3633 3634 3635 3636
SET UP OVERSCAN REGISTER
1.414:
C"P JNZ
OUT MOV
ox
AL,30H
CRT MODE ,b 1.414 AL,3FH
OX,AL CRT_PALETTE, AL
SET OVERSCAN PORT TO A DEFAULT VALUE OF 30H FOR ALL MODES
EXCEPT 640X200 SEE I F THE MODE IS 640X20 0 8W ! FIT I SNT 640X200, THEN GOTO REGULAR IF IT IS 640X200, THEN PUT IN 3FH
; OUTPUT THE CORRECT VALUE TO 309 PORT ; SAVE THE VALUE FOR FUTURE USE
NORMAL RETURN FROM ALL V IDEO RETURNS
v IDEO RETURN:
- POP
DI
POP
51
POP
BX
MIS:
VIDEO RETURN_C
PDP
CX
POP
OX
POP
OS
POP
ES
[RET
RECOVER SEGMENTS ALL OONE
.SE-T-_-M-O-DE- --- ENDP
j SET CTYPE - THIS ROUTINE SETS THE CURSOR VALUE
INPUT
(CX) HAS CURSOR VALUE CH-START LINE. CL-STOP LINE OUTPUT
NONE
~ET CTYPE
-
MOV
MOV
CALL JMP
PROC
NEAR
AH,IO
CURSOR MODE,CX
1.416 -
V IDEO_RETURN
; b845 REGI STER FOR I SAVE IN DATA AREA ; OUTPUT CX REG
CURSOR
SET
TH I S ROUT I NE OUTPUTS THE CX REG] STER TO THE 6845 REGS NAMED
1.416:
"DV "DV OUT
INC
ox, ADOR b845
AL,AH -
DX,AL OX
ADDRESS REGISTER GET VALUE REG J STER SET DATA REG I STER
MDV
AL,CH
DATA
OUT
OX.AL
DEC
OX
MOV INC
Al.AH AL
POINT TO OTHER DATA REGISTER
OUT
OX,Al
SET FOR SECOND REG I STER
INC
OX
MOV
AL,CL
SECOND DATA VALUE
OUT
OX ,AL
RET
ALL DONE
S; E-T-_-C-T-YPE
; SET CPOS
- TH I S ROUT I NE SETS THE CURRENT CURSOR
POS I T I ON TO THE NEW X-Y VALUES PASSED
INPUT
ox
ROW, COLUMN OF NEW CURSOR
BH - 0 I SPLAY PAGE OF CURSOR
OUTPUT
CURSOR IS SET AT 6845 IF DISPLAY PAGE
------I S CURRENT 0 I SPLA Y
SET- - CPOS
--- ----- -------------- ---- - -----
PROC
NEAR
-
MOV
CL.BH
XDR
CH.CH
; ESTABLISH LOOP COUNT
SAL
CX. I
I WORD OFFSET
MOV
SI,CX
; USE INDEX REGISTER
1.417:
"OV CMP
JNZ
"DV CALL
ISI+OFFSET CURSOR POSNj,DX
; SAVE THE POINTER
ACTIVE PAGE.8H -
1.417 -
SET CPOS RETURN
M"AX ,OX
GET-ROW I COLUMN TO AX CURSOR SET
SET_CPOS RETURN
JMP SET_CPOS
V JDEO RETURN ENDP -
--- SET CURSOR POSITION, AX HAS ROW/COLUMN FOR CURSOR
M 18 M'8
PROC CALL MDV ADD SAR MOV CALL RET ENDP
NEAR POSITION CX.AX CX.CRT START CX.! -
M'.AH.14
DETERM I NE LOCA T [ON I N REGEN BUFFER
ADD IN THE START ADDR FOR THIS PAGE OJ V J DE BY 2 FOR CHAR ONL Y COUNT REGI STER NUMBER FOR CURSOR OUTPUT THE VALUE TO THE 6845
5-152 PC-XT System BIOS (11/08/82)
LOC OBJECT
F217 F2 I 7 A26200 F2 I A 8BOE4COO F21E 98 F2 IF 50 F220 F7E 1 F222 A34EOO F225 8BC8 F227 DIF9 F229 840C F228 E8AAFF F22E 58 F22F 0lE3 F231 884750 F234 E8CFFF F231 E88C
F239 F239 8AOF F23B 32FF F23D DIE3 F23F 8B5750 F242 880E6000 F246 5F F241 5E F248 58 F249 58 F24A 58 F248 1F F24C 01 F24D CF
F24E F24E 88166300 F252 83C205 F255 A06600 F258 OAFF F25A 750E
F25C 24EO F25E 80E31F F261 OAC3 F263 F263 EE F264 A26600 F267 E958FF
F26A F26A 24DF F26C DOES F26E 73F3 F210 OC20 F212 EBEF
F214 F214 81<2641<00 F218 0404900 F218 8,4,3E6200 F27F 5F F280 5E F281 59 F282 E943FF
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
3631 3638 3639 3640 3641 3642 3643 3644
3645 3646 3641 3648 3649 3650
3651 3652 3653 3654 3655
3656 3657 3658 3659 3660
3661 3662 3663 3664 3665 3666 3667
3668 3669 3610 3611 3672 3673 3674 3675 3676 3617 3678
; ----- - - - -- ---------- - - - - -- - ---------- - ---- - - --- --------
ACT 0 I SP PAGE
:
- THTs ROUT! NE SETS THE ACT' VE 0 I SPLAY PAGE. ALLOW I NG THE
FULL USE OF THE RAM SET AS I DE FOR THE Y] OED ATTACHMENT
INPUT
AL HAS THE NEW ACTIVE DISPLAY PAGE
OUTPUT
;;oc---- ------------------------------- - - -- ;
THE 6845 IS RESET TO DISPLAY THAT PAGE
1~~ ~ 7;~ ~~G~
~~~~
-
MOV
MOV
caw
PUSH
MUL
MOV
MOV SAR
MOV CALL POP SAL MOV CALL JMP ACT_DI SP_PAGE
ACTIYE PAGE,AL
SAVE ACTIVE PAGE VALUE
CX, CRT:::\EN
GET SAVED LENGTH OF REGEN BUFFER
CONVERT AL TO WORD
AX
SAVE PAGE VALUE
CX
DISPLAY PAGE TIMES REGEN LENGTH
CRT_START,AX
SAVE START ADDRESS FOR
LATER REQU I REMENTS
CX. AX
START ADDRESS TO CX
CX,I
DIVIDE BY 2 FOR 6845 HANDLING
AH, ]2
6845 REG]STER FOR START ADDRESS
M1.
BX
RECOVER PAGE VALUE
BX,I
, "2 FOR WORD OFFSET
AX, [8X + OFFSET CURSOR POSN]
; GET CURSOR FOR THIS PAGE
M18
- ; SET THE CURSOR POS I T I ON
SHORT V IDEO RETURN
ENDP
READ CURSOR
- THIS ROUTINE READS THE CURRENT CURSOR VALUE FROM THE
6845, FORMATS IT, AND SENDS I T BACK TO THE CALLER
INPUT
BH - PAGE OF CURSOR
OUTPUT
OX - ROW, COLUMN OF THE CURRENT CURSOR POSITION
--; - ----C-X---- --C-U-R-RE-N--T- C-U-R-S-O-R- -M-O--D-E-- - ------ --- - ------- -- ----------
READ CURSOR
-
MOV
PRoe 8L,BH
NEAR
XOR
BH,BH
SAL
BX, I
; WORD OFFSET
MOV
DX. [BX+OFFSET CURSOR_POSN]
3619
MOV
CX,eURSOR MODE
3680
POP
01
3681
POP
SI
3682
POP
BX
3683
POP
AX
DISCARD SAVED CX AND OX
3684
POP
AX
3685
POP
OS
3686 3687
POP
ES
IRET
3688 READ_CURSOR
ENDP
3689
3690
SET COLOR
3691
THIS ROUTINE WILL ESTABLISH THE BACKGROUND COLOR, THE OVERSCAN
3692
COLOR, ANO THE FOREGROUND COLOR SET FOR MEDIUM RESOLUTION
3693
GRAPHICS
3694
INPUT
3695
IBHI HAS COLOR 10
3696
IF BH=O, THE BACKGROUND COLOR VALUE IS SET
3697
FROM THE LOW BITS OF BL (0-31)
3698
IF BH= I, THE PALETTE SELECT I ON I S MADE
3699
BASED ON THE LOW BIT OF BL:
3100
O=GREEN, RED, YELLOW FOR COLORS 1,2,3
370 I
I",BLUE. CYAN, MAGENTA FOR COLORS 1,2,3
3702
I BL I HAS THE COLOR VALUE TO BE USED
3703
OUTPUT
- ------- ---- --------- 3104
THE COLOR SELECTION IS UPDATED
3105 ~~~ ~o~o~
;;~c
~~ ~~
~
3706
3107
-
MOY
OX, ADDR 6845
1/0 PORT FOR PALETTE
3108
ADD
DX,5
OVERSCAN PORT
3709
1040'1
AL, CRT PALETTE
GET THE CURRENT PALETTE YALUE
3710
OR
8H,BH -
IS THIS COLOR 01
311 I
..INZ
10120
OUTPUT COLOR I
3712
37 I 3
---- HANDLE COLOR 0 BY SETTING THE BACKGROUND COLOR
3114
3715
AND
AL,OEOH
TURN OFF LOW 5 BITS OF CURRENT
3116
AND
BL,OIFH
TURN OFF HIGH 3 BITS OF INPUT VALUE
3111
OR
AL,BL
PUT VALUE INTO REGISTER
3118 10419:
OUTPUT THE PALETTE
3719
OUT
DX,AL
OUTPUT COLOR SELECT 1ON TO 309 PORT
3720
MOV
CRT PALETTE, AL
SAVE THE COLOR VALUE
3721
JMP
VIDEO_RETURN
3122
3723 ;----- HANDLE COLOR I BY SELECTING THE PALETTE TO BE USED
3724
3725 10120:
3726
AND
AL,OOFH
TURN OFF PALETTE SELECT BIT
3727 3728
S"R JNC
.,9BL,I
TEST THE LOW ORDER BIT OF BL ALREADY DONE
3129
OR
AL,20H
TURN ON PALETTE SELECT BIT
3130
J"P
3131 3732
~:~-=:~:~~ - ~
M19 ENOP
GO DO IT
3733 ; VIDEO STATE
3734 ; RETURNS THE CURRENT V IDEO STATE I N AX
3735 ; AH" NUMBER OF COLUMNS ON THE SCREEN
3736 ; AL" CURRENT Y IDEO MODE
3731 J BH = CURRENT ACT I 'IE PAGE
- ---- -------- 3738
3739
~ ~ ~~~
~~ ~~~ -----;;~c
~~~~
3740
- MOV
AH, BYTE PTR CRT COLS
GET NUMBER OF COLUMNS
3141
MOV
AL. CRT MODE
-
CURRENT MODE
3142
MOV
BH.ACTTYE PAGE
GET CURRENT ACT I YE PAGE
3143
POP
01
-
RECOVER REGISTERS
3744
POP
S I
3745
POP
CX
DISCARD SAYED BX
3746
..IMP
MI5
RETURN TO CALLER
3747 VIDEO_STATE
ENDP
PC-XT System BIOS (11/08/82) 5-153
LOC OBJECT
F285 F285 53 F286 8B08 F288 8AC4 F28A F6264AOO F28E 32FF F290 03C3 F292 OlEO F294 5B F295 C3
F296 F296 8AD8 F298 80FC04 F29B 1208 F29D 80FC07 F2AO 7403 F2A2 E9FOO I F2A5 F2A5 53 F2A6 8BC I F2A8 E83100 F2AB 7431 F2AO 03FO F2AF 8AEE. F2BI 2AE3 F2B3 F2B3 E87200 F2Bb 03FS F2B8 03FD F2BA FECC F2BC 75F5 F2BE F2BE 58 F2BF B020 F2CI F2C 1 E86000 F2C4 03FD F2C6 FECB F2C8 15F1 F2CA F2eA E88COl F2CD 803E490007 F2D2 1401 F2D4 A06500 F2D1 BAD803 F2DA EE F20B F20B E9E1FE F20E F2DE 8ADE F2EO EBDC
F2E2 F2E2 803E490002 F2E7 7218 F2E9 803E-490003 F2EE 7711
F2FO 52 F2FI BADA03 F2F4 50 F2F5 F2F5 EC F2F6 A808 F2F8 14FS F2FA B025 F2FC B208 F2FE EE F2FF 58 F300 SA F301 F30! E881FF F304 0306-4EOO F308 8BF8 F30A 8BFO F30C 2BO I F30E FECE. F3!0 FEC2 F312 32ED F314 8B2E4AOO F318 03EO F31A 8AC3 F31 C F6264AOO F320 03CO F322 06
LINE
3748 3749 3750 3751 3752 3753 375-4 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3711 3712 3713 3774 3775 3776 3777 3778 3779 3780 3181 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3193 379-4 3795 3796 3797 3798 3799 3800 3801 3802 3603 3604 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3811 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 38-42 3843 3844 3845 3846 3841 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863
SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
; -- ----- -- -;~~ ~; ~ ~~ - - - - - -
------------ ---- -- ----------- -
;
THIS SERVICE ROUTINE CALCULATES THE REGEN
; I NPUT BUFFER ADDRESS OF A CHARACTER I N THE ALPHA MODE
I
= AX ROW, COLUMN POSITION
= ; OUTPUT
1
AX
OFFSET OF CHAR POSITION IN REGEN SUFFER
1---- - - - - - - - - - -------------------------- - - - - - -- --
POS I T I ON
PROC
NEAR
PUSH
BX
I SAVE REGISTER
MOV
BX,AX
MOV
AL,AH
; ROWS TO AL
MUL
BYTE PTR CRT_eOLS
I DETERMINE BYTES TO ROW
XOR
BH,BH
ADD
AX,BX
; ADD I N COLUMN VALUE
SAL
AX,1
; · 2 FOR ATTRIBUTE BYTES
POP
BX
RET
POS
; --
I T
--
lON
---
-
-
-
-
-
-
-
-
-EN- D- P- -
-
--
-
-
-
-
-
------------ ------------
; SCROLL UP
I
THIS ROUTINE MOVES A BLOCK OF CHARACTERS UP
ON THE SCREEN
INPUT
(AH) :: CURRENT CRT MODE
(ALI :: NUMBER OF ROWS TO SCROLL
(CXI :: ROW/COLUMN OF UPPER LEFT CORNER
(OXI :: ROW/COLUMN OF LOWER R[GHT CORNER
(BHl :: ATTRIBUTE TO BE USED ON BLANKED LINE
(DSI :: DATA SEGMENT
(ESI :: REGEN BUFFER SEGMENT
OUTPUT
; ;
-
-
-
-
-
-
NONE -
- - - - --
-
T- H-E--R-E-G-E-N--B-U--F-FE-R---IS---M-O-D-I-F-IE-D
ASSUME CS;CODE.OS:DATA.ESIDATA
SCROLL_UP
PROC
NEAR
MOV
BL,AL
SAVE LINE COUNT IN BL
CMP
AH,4
TEST FOR GRAPH I CS MODE
.JC
NI
HANDLE SEPARATELy
CMP
AH.7
TEST FOR BW CARD
.JE
Nl
.JMP
GRAPHICS_UP
NI:
UP CONTINUE
PUSH
BX
SAVE FILL ATTRIBUTE IN BH
"DV CALL
OZ ADO
AX,CX
SCROLL POSITION
N7
-
SI,AX
UPPER LEFT POS I T I ON 00 SETUP FOR SCROLL BLANK FIELD FROM ADDRESS
MOV
AH.DH
# ROWS I N BLOCK
SUB
AH,BL
N2:
# ROWS TO BE MOVED ROW LOOP
CALL
NI.
MOVE ONE ROW
ADO
SI.BF
ADO
DI,BP
POINT TO NEXT LINE IN BLOCK
DEC
AH
COUNT OF LI NES TO MOVE
oNZ
N2
N3:
ROW LOOP CLEAR ENTRY
POP
AX
RECOVER ATTRIBUTE IN AH
NOV
AL. '
N41
CALL
Nil
FILL WITH BLANKS
CLEAR LOOP CLEAR-THE ROW
ADD
OI,BP
PO I NT TO NEXT LI NE
DEC
BL
COUNTER OF LINES TO SCROLL
oNZ
N4
CLEAR LOOP
N5:
SCROLL_END
CALL
DDS
C"P JE
CRT MODE.7 N6 -
IS TH I S THE BLACK AND WHITE CARD I F SO, SK I P THE MODE RESET
"DV "DV
~i:g~68~ODE_SET
GET THE VALUE OF THE MODE SET ALWAYS SET COLOR CARD PORT
OUT
OX,AL
N6:
I VIDEO_RET_HERE
VIDEO_RETURN
N7:
BLANK FIELD
BL,DH
GET ROW COUNT
N3
GO CLEAR THAT AREA
ENOP
;----- HANDLE COMMON SCROLL SET UP HERE
SCROLL POS I T I ON PROC
NEAR
- CMP
CRT MODE. 2
.JB
N9 -
CMP
CRT MODE, 3
..JA
N9 -
TEST FOR SPEC I AL CASE HERE HAVE TO HANDLE 80X25 SEPARATELY
; ---- 80X25 COLOR CARD SCROLL
N8; N9;
NOV PUSH
IN TEST JZ NOV NOV OUT POP POP
CALL ADD MOV MOV SUB INC INC XOR MOV ADO MOV MUL ADO PUSH
OX OX,30AH AX
AL,DX AL,8 NB AL,25H DL,008H DX,AL AX OX
POSITION AX ,CRT_START DI.AX SI,AX DX,CX DH DL CH.CH BP.CRT COLS BP,BP -
AL.BL BYTE PTR CRT_COLS AX.AX ES
GUARANTEED TO BE COLOR CARD HERE
WA[T D[SP ENABLE GET PORT WA[T FOR VERTICAL RETRACE WAIT_DISP_ENABLE
OX,,3D8 TURN OFF V [OED OUR I NG VERT [CAL RETRACE
CONVERT TO REGEN PO INTER OFFSET OF ACT I VE PAGE TO ADDRESS FOR SCROLL FROM ADDRESS FOR SCROLL OX " # ROWS, #COLS I N BLOCK
I NCREMENT FOR 0 OR I GIN SET HIGH BYTE OF COUNT TO ZERO GET NUMBER OF COLUMNS IN DISPLAY TIMES 2 FOR ATTRIBUTE BYTE GET LINE COUNT DETERM I NE OFFSET TO FROM ADDRESS ·2 FOR ATTR IBUTE ByTE ESTABLISH ADDRESSING TO REGEN BUFFER
5-154 PC-XT System BIOS (11/08/82)
LOC OBJECT
F323 1F F324 80FBOO F327 C3
F321l F328 F32A
F329 F32C F32D F32E F32F F330
8ACA 56
57 F3 AS 5F 5E C3
F33: F33: F333 F334 F335 F336 F337
BACA 57 F3 AB SF C3
F338 F338 FD F339 8AD8 F33B 80FC04 F33E 7208 F340 80FC07 F343 7403 F345 E9A60 1 F348 F341l 53 F349 8BC2 F34B E894FF F34E 7420 F350 2BFO F352 8AE6 F354 2AE3 F356 F356 E8CFFF F359 2BF5 F35B 2BFD F35D FECC F35F 75F5 F361 F361 58 F362 B020 F364 F364 E8CAFF F367 2BFD F369 FECB F36B 75F7 F36D E95AFF F370 F370 8ADE F372 EBED
LINE SOURCE IB[OS FOR THE IBM PERSONAL COMPUTER XT) 11 {08/82
3864 3B65 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875
POP
OS
CMP
BL,O
RET
SCROLL_pas I T I ON ENDP
MOVE ROW
NIO
PROC NOV PUSH PUSH REP
NEAR CL,DL SI DI MOVSW
FOR BOTH Fa INTERS , 0 SCROLL MEANS BLANK F [ELO I RETURN WITH FLAGS SET
GET II OF COLS TO MOVE SAVE START ADDRESS MOVE THAT LINE ON SCREEN
3876 3877 3878 38 ?9 3880 3881 3882 3883 3884 3885
NIO
POP
DI
POP
SI
RET
ENDP
CLEAR ROW
PROC NDV PUSH REP
NEAR
CL,DL DI STOSW
RECOVER ADDRESSES
GET · COLUMNS TO CLEAR STORE THE FILL CHARACTER
3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903
3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 39 I 9 3920 392 \ 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940
POP
01
RET
ENDP
;---
; SCROLL DOWN
:
TH [S ROUT I NE MOVES THE CHARACTERS W[TH I N A
;
DEF I NED BLOCK DOWN ON THE SCREEN, F JLL I NG THE
:
TOP L [NES WITH A DEF 1NED CHARACTER
; [NPUT
;
= (AH)
CURRENT CRT MODE
;
IALI
NUMBER OF LINES TO SCROLL
;
I CX)
UPPER LEFT CORNER OF REGION
;
(OX)
LOWER RIGHT CORNER OF REG I ON
;
IBH)
FILL CHARACTER
;
IDS)
OA T A SEGMENT
;
(ES) = REGEN SEGMENT
; OUTPUT
;
NONE - - SCREEN 1S SCROLLED
;~~~~~-~~;~ - - - - - ~~~~-- - - - - - - - - - - ------- - - - - ------ ------
N12; N13:
- STD MOV CMP JC CMP JE JMP
PUSH NOV CALL JZ SUB NOV SUB
CALL SUB SUB DEC JNZ
BL,AL AH,4 NI2 AH,7 NI2 GRAPHICS_DOWN
BX AX,DX SCROLL POSITION NI6 S J ,AX AH,OH AH,BL
NIO SI,SP DI,SP AH NI3
; DIRECTION FOR SCROLL DOWN : LINE COUNT TO BL ; TEST FOR GRAPHICS
TEST FOR BW CARD
CONT I NUE DOWN SAVE ATTRIBUTE IN BH LOWER R \ GHT CORNER GET REGEN LOCAT[ON
51 ]5 FROM ADDRESS GET TOTAL # ROWS COUNT TO MOVE I N SCROLL
; MOVE ONE ROW
PDP NDV N1S: CALL SUB DEC JNZ JNP N16: MOV JMP SCROLL_DOWN
AX AL,
Nil OI,SP BL
NI5 N5
BL.DH N\4 ENDP
RECOVER ATTR I BUTE [N AH
CLEAR ONE ROW GO TO NEXT ROW
PC-XT System BIOS (11/08/82) 5-155
LaC OBJECT
F374 F314 80FC04 F377 7208 F379 80FC07 F37C 7403 F37E E9A802 F381 F381 E81AOO F384 88F3
F386 88166300 F38A 83C206 F38D 06 F38E IF F38F F38F EC F390 A80 I F392 75F8 F394 FA F395 F395 EC F39b A80 I F39t\ 74FB F39A AD F398 E927FE
F39E F39E 8ACF F3AO 32EO F3A2 8BF I F3A4 0lE6 F3A6 884450 F3A9 3308 F3AB E306 F3AD F3AD 031 E4COO F3B 1 E2FA F383 F3B3 E8CFFE F3B6 0308 F388 C3
F389 F389 80FC04 F38C 7208 F38E 80FC07 F3C 1 7403 F3C3 E9B20 1 F3Cb F3C6 8AE3 F3C8 50 F3C9 51 F3CA E80lFF F3CD SBFB F3CF 59 F3DO 58 F3DI
F3D I 88 I 00300 F3D5 83C206 F3D8 F3D8 EC F3D9 A80 I F3D8 15FB F300 FA F3DE F3DE EC F30F A801 F3E I 74FB F3E3 8BC3 F3E5 AB F3E6 F8 F3E1 E2E8 F3E9 E9D9FD
3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 396 ! 3902 3963 3964 3965 3966 3961 3968 3969 3970 3971 3912 3913 3914 3975 3916 3917 3978 3919 3980 3981 3982
3983 3984 3985 3986 3981 3988 3989 3990 3991 3992 3993 3994 3995 3996 3991 3998 3999
4000 400 I 4002 4003 4004 4005 4006 4007 4008 4009 40 I 0 40 I I 4012 4013 4014 4015 4016 4011 4018 4019 4020 4021 4022 4023 4024 4025 4026 4021 4028 4029 4030 4031 4032 4033 4034 4035 4030 4031 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051
SOURCE IBIDS FOR THE IBM PERSONAL COMPUTER XTI 11/08/82
- -------- - - -- - - --- - --- -- -- - --
; READ AC CURRENT
;
- THIS ROUTINE READS THE ATTRIBUTE AND CHARACTER
;
AT THE CURRENT CURSOR POSIT[ON AND RETURNS THEM
; I NPUT TO THE CALLER
;OUTPUT
I AH J ~ BH! (OS)
(ES)
;:; CURRENT CRT MODE
= 0 [SPLA Y PAGE I ALPHA MODES ONL Y J = DATA SEGMENT
;:; REGEN SEGMENT
1
I AL I ;:; CHAR READ
IAHI ;:; ATTRIBUTE READ
ASSUME CS:COOE,OS:oATA,ES:DATA
READ AC CURRENT PROC
- -CMP
AH,4
NEAR
,.JC
PI
CMP
AH,7
JE
PI
JMP
GRAPHICS_READ
PI:
CALL
FIND POSITION
NOV
SI,BX
IS TH IS GRAPH I CS IS TH I S BW CARD
READ _ AC_CONT I NUE EST ABL I SH ADDRESS I NG INS I
;----- WA[T FOR HORIZONTAL RETRACE
P2: P3:
NOV AOO PUSH POP
IN TEST JNZ
eLI
IN TEST JZ LODSW J"P
OX,AOoR 6845 DX,6 ES OS
AL,OX AL,I P2
AL,DX AL,I P3
GET BASE ADDRESS POINT AT STATUS PORT
GET SEGMENT FOR QUICK WA I T FOR RETRACE LOW GET STATUS I S HaRZ RETRACE LOW WAIT UNTIL IT IS NO MORE INTERRUPTS WA I T FOR RETRACE HIGH GET STATUS IS IT HIGH WAIT UNTIL IT [S GET THE CHAR I ATTR
ACCESS
FIND POSITION
-
MOV
XOR
PROC CL,BH CH,CH
NEAR
; DISPLAY PAGE TO ex
NOV
S I · CX
; MOVE TO S I FOR I NOEX
SAL
SI,I
; · 2 FOR WORD OFFSET
NOV XOR
~~: ~i I +OFFSET eURSOR_POS~) SET ST lR~E!D~~:~;O~~M~E~~ THAT PAGE
JCXZ
P5
P4:
; NO PAGE : PAGE LOOP
P5:
ADD LOOP
CALL ADO RET
8X ,CRT LEN
P4
POSITION BX,AX
: LENGTH OF BUFFER
NO PAGE oETERM I NE LOCA T [ON I N REGEN ADD TO START OF REGEN
FI ;-
NO -_::
"P--O,-S-IT- IO-N-
--
-
-E-N-D-P-
-
-
-
-
-
-
-
WR ITE AC CURRENT
-THIS ROUTINE WRITES THE ATTRIBUTE
AND CHARACTER AT THE CURRENT CURSOR
POSIT[ON
[NPUT
LAH) ;:; CURRENT CRT MODE
iBH) : DISPLAY PAGE {CX) ;:; COUNT OF CHARACTERS TO WR I TE {ALI ;:; CHAR TO WRITE
IBLI ;:; ATTRIBUTE OF CHAR TO WRITE lOS I ;:; DATA SEGMENT
I ES) ;:; REGEN SEGMENT
OUTPUT
-- - NONE
ym
I
-TE
---- - ----
AC CURRENT
-
----
-- --- --
PROC
- eMP
AH,4
JC
P6
NEAR
15TH I S GRAPHICS
CMP JE
AH,1 P6
[S THIS BW CARD
JMP
GRAPHICS_WRITE
P6:
NOV
AH,BL
PUSH
AX
PUSH
ex
CALL
FIND POSITION
WR I TE AC CONT I NUE GET ATTRTBUTE TO AH SAVE ON STACK SAVE WRITE COUNT
P7:
NOV POP POP
O[ ,BX
ex
BX
ADDRESS TO 0 I REG I STER WR I TE COUNT CHARACTER IN BX REG WR ITE_LOOP
WA I T FOR HOR [ ZONT AL RETRACE
P8:
"OV ADO
DX,ADDR 6845 OX,6 -
IN
AL,DX
TE5T
AL,I
JNZ
P8
eLI
P9:
IN TEST JZ NOV
STOSW
AL,DX AL, I P9 AX,BX
ST I
LOOP
P7
JMP
VIDEO RETURN
WRITE_AC_CURRENT
- ENDP
GET BASE ADDRESS POINT AT STATUS PORT
GET STATUS IS IT LOW WAIT UNTIL [T IS NO MORE INTERRUPTS
GET STATUS IS IT HIGH WAIT UNTIL IT IS RECOVER THE CHAR I ATTR PUT THE CHAR/ATTR INTERRUPTS BACK ON
AS MANy TIMES AS REQUESTED
5-156 PC-XT System BIOS (11/08/82)
LOC 08.JECT
F3EC F3EC 60FC04 F3EF 1206 F3FI BOFC07 F3F4 1403 F3F6 E97FO I F3F9 F3F9 50 F3FA 5 I F3F8 EBAOFF F3FE 88F8 F400 59 F-401 58 F-402
F-402 88166300 F-406 63C206 F-409 F-409 EC F40A A80 I F40C 75F8 F 40E FA F40F F40F EC F410 A801 F412 74F8 F414 8AC3 F416 AA F-411 F8 F418 47 F-419 E2E7 F-4,8 E9A7FO
F-4IE F-41E E83100 F421 266.1.04 F424 22C-4 F426 02EO F428 8ACE F42A D2CO F42C E996FO
F42F F 42F 50 F430 50 F431 E81EOO F434 D2E8 F436 22C4 F438 268AOC F438 58 F43C F6C380 F-43F 7500 F-441 F&D4 F443 22CC F445 OACI F447 F447 268804 F44A 58 F448 E977FD F44E F44E 32C 1 F450 EBF5
LINE SOURCE 1810S FOR THE IBM PERSONAL COMPUTER Xl) 11/08/82
4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4011 4012 4013 4014 4015 4076 4011 4078 4019 4080 4081 4082 4083 4084 4085 4086 4081 4088 4089 4090 4091 4092 4093
4094 4095 4096 4091 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 41 I 1 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4131 4138 4139 4140 4141 4142 4143 4144 4145 4146 4141 4148 4149
;
WR ITE C CURRENT
-THIS ROUTINE WRITES THE CHARACTER AT
THE CURRENT CURSOR POS! T I ON I ATTR I BUTE
UNCHANGED
INPUT
= IAH)
CURRENT CRT MODE
= IBH)
DISPLAY PAGE
(CX) ;:: COUNT OF CHARACTERS TO WRITE
(AL) = CHAR TO WRITE (OS) = DATA SEGMENT
IES) :: REGEN SEGMENT
OUTPUT
NONE
1--- ---------
WR I TE C CURRENT PROC
NEAR
- -CMP
AH,4
IS THIS GRAPHICS
.JC
PIO
C~P
AH,1
1S TH IS BW CARD
,JE
PIO
,J~P
GRAPHICS_WR I TE
PI 0:
PUSH
AX
PUSH
ex
SAVE ON STACK SAVE WR I TE COUNT
CALL
FIND POSITION
MO' POP
DI,8X
ex
ADDRESS TO 0 I WR I TE COUNT
POP
BX
8L HAS CHAR TO WR ITE
PI I:
WR I TE_LOOP
1----- WAIT FOR HORIZONTAL RETRACE
P12: P13:
MOV AOO
IN TEST oNZ CL I
IN TEST
- OX ,ADDR 6845
OX ,6
AL,DX AL,I PI2
AL,DX AL,I
GET BASE ADDRESS POINT AT STATUS PORT
GET STATUS IS IT LOW WAIT UNTIL IT IS NO MORE INTERRUPTS
GET STATUS IS IT HIGH
OZ
PI3
WA[T UNT[L IT IS
MO' STOS8
AL,BL
RECOVER CHAR PUT THE CHARI ATTR
STI
I NTERRUPTS BACK ON
INC
D[
8UMP POINTER PAST ATTRIBUTE
LOOP
PI!
AS MANY T I ~ES AS REQUESTED
.JMP
v IDEO RETURN
---- WR I TE_C_CURRENT
; ------------ -
ENOP -
--- ------
-
-
-
--------------
-
-
-
--
-
-
-
-
-
-
-
-
READ DOT - WR 1TE DOT
:
THESE ROUTINES WILL WRITE A DOT, OR READ THE DOT AT
;
THE IND[CATED LOCATION
ENTRY - OX = ROW 1.0-199)
ITHE ACTUAL VALUE DEPENDS ON THE MODE)
CX :0 COLUMN ( 0-6391 ( THE VALUES ARE NOT RANGE CHECKED)
AL :0 DOT VALUE TO WR)TE (1,2 OR 4 81TS DEPEND[NG ON MODE,
REQ'D FOR WRITE DOT ONLY, RIGHT ,JUSTIFIED)
BIT 1 OF' AL=1 INDICATES XOR THE VALUE INTO THE LOCAT[ON
OS :0 DATA SEGMENT ES = REGEN SEGMENT
EX] T AL = DOT VALUE READ, RIGHT ,JUSTIFIED, READ ONLY
ASSUME
READ DOT
-
CALL
MOV
AND
SHL
MOV
ROL
oMP
READ_DOT
CS: CODE, OS: DATA, ES :OATA
PROC
NEAR
R3
AL,ES: (SI)
AL,AH
AL,CL
CL,DH
AL,CL
V IDEO RETURN ENDP -
OETERMI NE BYTE POS I T I ON OF DOT GET THE 8YTE MASK OFF THE OTHER BITS IN THE LEFT JUST I FY THE VALUE GET NU~BER OF BITS IN RESULT RIGHT .JUSTIFY THE RESULT RETURN FROM V IDEO I 0
BYTE
WRITE DOT - PUSH
PUSH CALL
SHR
AND MOV
POP
TEST
"NZ NOT
AND
OR Rio
MOV
POP
R2:
oMP
PROC
NEAR
AX
AX
R3
AL,CL
AL,AH
CL,ES: [SI ]
BX
8L ,80H
R2
AH
CL,AH
AL,CL
ES:[SII,AL AX VIDEO_RETURN
AL,CL RI ENDP
SAVE DOT VALUE TWICE
DETERM INE BYTE POS 1T [ON OF THE DOT SHIFT TO SET UP THE 8[TS FOR OUTPUT STRIP OFF THE OTHER BITS GET THE CURRENT BYTE RECOVER XOR FLAG IS IT ON YES, XOR THE DOT SET THE ~A SK TO REMOVE THE
INDICATED BITS OR IN THE NEW VALUE OF THOSE BITS FIN[SH DOT RESTORE THE BYTE IN MEMORY
RETURN FROM V IDEO I 0 XOR DOT EXC[US I VE OR THE DOTS F[NISH UP THE WRIT[NG
PC-XT System BIOS (11/08/82) 5-157
LOC OBJECT
F452 F452 53 F453 50
F454 B028 F456 52 F457 80E2FE F45A F6E2 F45C 5A F450 F6C20 I F4bO 7403 F462 050020 F465 F465 8BFO F467 58 F468 8BOI
F46A BBC002 F46D B90203 F470 803E490006 F475 7206 F477 BB8001 F47A B90307
F410 F41D 22EA
F47F 03EA F481 03F2 F483 8AF7
F485 2AC9 F481 F481 DOC8 F489 02CO F48B FECF F480 75F8 F48F 8AE3 F491 D2EC F493 5B F494 C3
F495 F495 8AD8 F497 88CI
F499 E86902 F49C 8BF8
F49E 2BOI F4AO 81C20101 F4A4 DOEb F4A6 DOEb
F4A8 803E490006 F4AD 7304
LINE SOURCE IBIOS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
4150
4151
TH I S SUBROUT I NE DETERM I NES THE REGEN BYTE LOCA T I ON
4152 4153
OF THE INDICATED ROW COLUMN VALUE IN GRAPHICS MODE. ENTRY -
4154
4155 415b 4157
OX " ROW VALUE 10-199)
ex " COLUMN VALUE (0-639)
EX I T
S I OFFSET I NTO REGEN BUFFER FOR BYTE OF INTEREST
4158 4159 41bO 41bl
AH CL
; --D-H-
MASK. TO STRIP OFF THE BITS OF INTEREST BITS TO SHIFT TO RIGHT JUSTIFY THE MASK. IN AH · BITS IN RESULT
4162 R3
41 b3 41b4
4165
PRoe PUSH PUSH
NEAR BX AX
; SAVE BX OURING OPERATION 1 WILL SAVE AL OURING OPERATION
4166 ;----- DETERMINE 1ST BYTE IN IDIO.TED ROW BY MULTIPLYING ROW VALLE BY 40
4161
( LOW BIT OF ROW DETERMINES EVEN/ODD, 80 BYTES/ROW
4168
4\69 4110 4111 4112 4113 4114 4115 411b
4\71 4178 4179 4180 4181 4182
R4:
MOV PUSH AND MUL
POP TEST
0'
ADO
MOV POP MOV
AL,40 DX OL,OFEH DL
OX DL,I R4 AX,ZOOOH
SI,AX AX OX.CX
SAVE ROW VAL UE
STR IP OFF oDD/EVEN BIT AX HAS ADDRESS OF 1ST BYTE
OF INDICATED ROW RECOVER IT TEST FOR EVEN/ODD
JUMP I F EVEN ROW
; OFFSET TO LOCATION OF ODD ROWS ; EVEN ROW ; MOVE-PO INTER TO S I ; RECOVER AL VALUE ; COLUMN VALUE TO OX
4183
--- DETERMINE GRAPH[CS MODE CURRENTLY IN EFFECT
4184
4185
4186 ; SET UP THE REGISTERS ACCORDING TO THE MODE 4181 ; CH" MASK FOR LOW OF COLUMN ADDRESS ( 7/3 FOR HIGH/MED RES!
4168 ; CL" # OF ADDRESS BITS IN COLUMN VALUE I 312 FOR HIM!
4169 ; BL" MASK TO SELECT BITS FROM POINTED BYTE (BOH/COH FOR HIM!
m.4190
;
BH '" NUMBER OF VALID BITS IN POINTED BYTE ( I 12 FOR HIM)
4193 4194 4195
4196 4191 4\96 4199
MOV MOV eNP
"C
MOV "OV
BX ,2COH CX.302H CRT MODE,b R5 -
BX, 1BaH CX,703H
SET PARMS FOR MED RES HANDLE IF MED ARES SET PARMS FOR HIGH RES
4200
---- DETERMINE BIT OFFSET IN BYTE FROM COLUMN MASK
4201
4202 R5:
4203
AND
CH,DL
I ADDRESS OF PEL 'III I TH I N BYTE TO CH
4204
4205 4206
OETERM I NE BYTE OFFSET FOR TH IS LOCATION I N COLUMN
4207
SHR
OX ,CL
; SH I FT BY CORRECT AMOUNT
4208 4209 42\0
ADD MOV
S I · OX DH,BH
; I NCREMENT THE PO INTER I GET THE. OF BITS IN RESULT TO DH
4211
MULTIPLY BH (VALID BITS IN BYTE) BY CH (BIT OFFSET)
42\2
4213 4214 R6:
SUB
CL,CL
ZERO INTO STORAGE LOCATION
4215 4216
ROR
AL,I
LEFT JUSTIFY THE VALUE
IN AL (FOR WRITEI
4217 4218 4219 4220
ADO DEC "NZ
CL,CH BH Rb
ADD IN THE BIT OFFSET VALUE
LOOP CONTROL
ON EXIT. CL HAS SHIFT COUNT
TO RESTORE B[TS
4221 4222 4223
4224
MOV SHR POP RET
AH,BL AH,CL BX
GET MASK TO AH
MOVE THE MASK TO CORRECT LOCATION
RECOVER REG
RETURN WITH EVERYTHING SET UP
4225 4226
R3
-----EN-D--P - -
4227 ; SCROLL UP
4228 4229 4230 4231
; ENTRY THIS ROUT[NE SCROLLS UP THE INFORMATION ON THE CRT
CH, CL = UPPER LEFT CORNER OF REG I ON TO SCROLL DH.DL = LOWER RIGHT CORNER OF REG I ON TO SCROLL
4232 4233
BOTH OF THE ABOVE ARE IN CHARACTER POSITIONS
BH = FILL VALUE FOR BLANKED LINES
4234
AL = · Ll NES TO SCROLL (AL=O MEANS BLANK THE ENT [RE
4235
FIELD)
4236 4237
OS = DATA SEGMENT
ES = REGEN SEGMENT
4238 4239
EXIT NOTH I NG, THE SCREEN [S SCROLLED
4240 4241 4242 4243 4244
~;~;~~~~-~;-MOV
NOV
PROC BL,AL AX,CX
NEAR
; SAVE L [NE COUNT IN 8L I GET UPPER LEFT POSITION INTO AX REG
4245 ; -- - - - USE CHARACTER SU8ROUT I NE FOR POS I T I ON I NG
4246 4247
ADDRESS RETURNED IS MULTIPLIED BY 2 FROM CORRECT VALUE
4248 4249
CALL
GRAPH POSN DI,AX-
; SAVE RESULT AS DESTINATION ADDRESS
4250
4251
DETERMINE SIZE OF WINDOW
4252
4253 4254 4255 4256 4251
SUB ADD SAL
SAL
DX,CX
OX, 10 IH DH,I
DH, I
ADJUST VALUES
MULTIPLY # ROWS BY 4
SINCE 8 VERT DOTS/CHAR AND EVEN/ODD ROWS
4256
4259 ;----- DETERMINE CRT MODE
4260
4261 4262
eNP JNC
CRT MODE.b R1 -
TEST FOR MEDIUM RES
F I NO SOURCE
5-158 PC-XT System BIOS (11/08/82)
LOC OB.JECT
F4AF DOE2 F481 D1E7
F4B3 F4B3 06 F4B4 IF F4B5 2AED F4B7 00E3 F4B9 DOE3 F4BB 1420 F4BO 8AC3 F4BF B450 F4Cl F6E4 F4C3 8BF7 F4C5 03FO F4C7 8A£6 F4C9 2AE3
F4CB
F4CB E88000 F4CE 81EEBOIF F402 81EFB01F F4D6 FECC F4D8 15FI
F40A F40A 8AC7 F4DC F4DC EBBBOO F4DF BIEFBOtF F4E3 FECB F4E5 75F5 F4E7 E9DBFC F4EA F4EA BADE
F4EC EBEC
F4EE F4EE FD F4EF BAD8 F4FI BBC2
F4F3 EBOF02 F4F6 8BF8
F4F8 2BOI F4FA B1C20101 F4FE 00E6
F500 DOE6
F502 B03E490006 F501 7305
F509 DOE2
F50B DIEl F500 47
F50E F50E 06 F50F 1F F5 10 2AED F512 81C7FOOO FSl6DOE3 F51B 00E3 F51A 742E F51C BAC3 F51E 8450 F520 F6E4 F522 5BF7 F524 2BFO F526 BAE6 F525 2AE3
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XTI 11/08/132
4263
4264 ; ----- MEDIUM RES UP
4265
4266 4267 4268
SAL SAL
DL.' 01,1
; · COLUMNS · 2. SINCE 2 BYTES / CHAR ; OFFSET -Z SINCE 2 BYTES/CHAR
4269 4270
- DETERMINE THE SOURCE AODRESS [N THE BUFFER
4271 4212 4273 4214
4275 4276 4277
4218 4279 4280 4281 42B2 4283 4284
4285
R7:
PUSH POP SUB SAL SAL JZ MOV
MOV MUL MOV ADD MOV SUB
ES OS CH,CH BL,I
BL.t
R"
AL,BL
AH,80 AH
SI,OI S I ,AX AH,OH AH,BL
; F I NO SOURCE ; GET SEGMENTS 80TH PO. NT I NG TO REGEN
; ZERO TO HIGH OF COUNT REG MULTIPLY NUMBER OF LINES BY 4
; 1F ZERO, THEN BLANI<. ENT I RE FIELD ; GET NUMBER OF LINES IN AL
80 BYTESfROW DETERM [NE OFFSET TO SOURCE ; SET UP SOURCE ; ADD IN OFFSET TO IT ; NUMBER OF ROWS IN F I ELO ; DETERM I NE NUMBER TO NOVE
4286 ;----- LOOP THROUGH. MOVING ONE ROW AT A T[ME, BOTH EVEN AND ODD FIELDS
4287
4288 4289 4290 4291 4292 4293 4294 4295 4296
R8:
CALL
R17
SUB
S I, 2000H-80
SUB
01,2000H-80
DEC
AH
"' JNZ
--- FILL IN THE VACATED LINErS)
RD. LOOP MOVE ONE ROW MOVE TO NEXT ROW
NUMBER OF ROWS TO MOVE CONTINUE TILL ALL MOVED
4297 4298 4299
R9: R10:
MOV
AL,BH
CLEAR ENTRY ATTRIBUTE TO FILL WITH
4300 4301 4302 4303 4304
CALL
sue
DEC
JNZ JMP
RIB 01 ,ZOOQH-80 BL RIO V IDEO_RETURN
I CLEAR THAT ROW
: POINT TO NEXT LINE
NUMBER OF LINES TO F [LL
CLEAR LOOP
EVERYTHING DONE
4305 4306 4307
4308 4309 4310
Rl1 :
MOV
JMP GRAPHICS_UP
BL,DH
R9 ENDP
BLANK FIELD
SET BLANK COUNT TO EVERYTHING IN FIELD
CLEAR THE FIELD
4311 4312
4313
SCROLL DOWN
THIS ROUTINE SCROLLS DOWN THE INFORMATION ON THE CRT ENTRY
4314 4315 4316 43, 7 4318 4319 4320
4321 4322
EXIT
CH,CL = UPPER k-EFT CORNER OF REGION TO SCROLL DH,DL = LOWER RIGHT CORNER OF REG I ON To SCROLL
= BOTH OF THE ABOVE ARE IN CHARACTER POSITIONS
8M FILL VALUE FOR BLANI<.ED LINES
AL = · Ll NES TO SCROLL (AL .. O MEANS BLANI<. THE ENT I RE
FIELD)
OS .. DATA SEGMENT
ES = REGEN SEGMENT
4323 :
NOTHING, THE SCREEN [S SCROLLED
---------- 4324
4325
~~~~~~~~- ~~;~ - - - ~~~~ - - --~~~~ - - ---
-
4326 4327 4328 4329
STD MOV
MOV
BL,AL AX,oX
; SET DIRECTION ; SAVE LINE COUNT IN BL
I GET LOWER RIGHT POSITION INTO AX REG
4330 4331 4332
;----- USE CHARACTER SUBROUTINE FOR POSITIONING ADDRESS RETURNED IS MULTIPLIED BY 2 FROM CORRECT VALUE
4333 4334 4335
CALL MOV
GRAPH POSN OI,AX
: SAVE RESULT AS DESTINATION ADDRESS
4336 ;- --- DETERMINE SIZE OF WINDOW
4337
4338 4339 4340 4341 4342 4343
SUB AOD SAL
SAL
DX,CX DX,10!H OH,l
DH,I
ADJUST VALUES
MULTIPLY' ROWS BY 4 S I NeE 1\ VERT DOTS I CHAR AND EVEN/ODD ROWS
4344 4345
---- DETERMINE CRT MODE
4346 4347 4348
CMP JNC
CRT MODE,6 R IZ
TEST FOR MED I UM RES F I NO_SOURCE_DOWN
4349 1----- MEDIUM RES DOWN
4350
4351 4352 4353 4354 4355
4356 4351
; - ----
SAL
SAL INC
oL,'
01,1 01
DE TERM I NE THE
SOURCE
ADDRESS
· COLUMNS - 2, SINCE 2 BY'TES/CHAR lOFFSET 01<.)
OFFSET -Z SINCE 2 BYTESfCHAR POINT TO LAST BYTE
I N THE BUFFER
4358 4359 4360 4361 4362
4363 4364 4365 4366
4367 436B 4369 4370 4371 4372
R 12;
PUSH
POP SUB ADO SAL SAL JZ
MOV
MOV MUL MOV
SUB MOV SUB
ES OS CH,CH 01,240 BL,I 8L,I R ,.
AL,BL AH, BO AH 51,01 SI,AX AH,OH AH,BL
FINO SOURCE DOWN 80TH-SEGMENTS TO REGEN
H. ZERO TO GH OF COUNT REG
POINT TO LAST ROW OF PIXELS MULTIPLY NUMBER OF LINES BY 4
IF ZERO, THEN BLANI<. ENTIRE FIELD GET NUMBER OF LINES IN AL 80 BYTES /ROW DETERM I NE OFFSET TO SOURCE SET UP SOURCE
SUBTRACT THE OFFSET ; NUMBER OF ROWS [N F. ELO i OETERM I NE NUMBER TO MOVE
PC-XT System BIOS (11/08/82) 5-159
LOC OBJECT
F52A F52A E82100 F52D 81 EE5020 F531 81 EF5020 F535 FECC F537 75Fl
F539 F539 F53B F53B F53E F542 F544 F546 F541 F54A F54A
8AC7
E82900 81 EF5020 FECB 75F5 FC E91BFC
8ADE
F54C EBEB
F54E F54E 8ACA F550 56 F551 57 F552 F3 F553 A4 F554 5F F555 5E F556 81 C60020 F55A 81C70020 F55E 56 F55F 51 F560 8ACA
F562 F3 F563 A4 F564 5F F565 5E F566 C3
F567 F561 F569 F56A F56B F56C F56D F571 F512 F514 F575 F576 F577
57 F3 AA 5F 81C70020 51 8ACA F3 AA 5F C3
F578
F518 B400
F51A 50
F57B E8840 I
F57E 8BF8
F580 58
F581 3C80
F583 1306
SOURCE IBIOS FOR THE IBM PERSONAL COMPUTER XTI 11/08/82
4313 4374 4315 4316 4377 4378 4319 4380 4381 43e2 4383 4384 4385 4386 4381 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 440 I 4402 4403 4404 4405 4406
LOOP THROUGH, MOVING ONE ROW AT A TIME, BOTH EVEN AND ODD FIELDS
R13;
CALL 5UB 5UB DEC JNZ
RI1 SI,2000H+80
DI,2000H+80
AH RI3
ROW LOOP DOWN MOVE ONE-ROW MOVE TO NEXT ROW
NUMBER OF ROWS TO MOVE CONT I NUE T [LL ALL MOVED
;----- FILL IN THE VACATED LINEIS)
R [4:
R15: R16:
CALL SUB DEC JNZ CLD JMP
MOV
JMP GRAPHICS_DOWN
AL,BH
RI8 DI,2000H+80 BL RI5
V [DEO_RETURN
BL,DH
RI4 ENDP
CLEAR ENTRY DOWN
ATTRIBUTE TO FILL WITH CLEAR LOOP DOWN CLEAR-A ROW
PO [NT TO NEXT LI NE
NUMBER OF LINES TO FILL CLEAR LOOP DOWN RESET-THE is [RECT I ON FLAG EVERYTH I NG DONE
BLANK F [ELD DOWN SET BLANK COUNT TO EVERYTH I NG
IN FIELD CLEAR THE FIELD
;----- ROUT[NE TO MOVE ONE ROW OF [NFORMAT[ON
RI1
PROC
NEAR
"OV
CL,DL
PUSH
51
PUSH
01
REP
MOVSB
NUMBER OF BYTES IN THE ROW
SAVE POINTERS MOVE THE EVEN F [ELD
4401 4408 4409 4410 441 I 4412 4413
POP POP ADD ADO PUSH PUSH
"OV
01 51 SI,2000H DI,2000H 51 01 CL,DL
MOVSB
POINT TO THE ODD FIELD
SAVE THE POI NTERS COUNT BACK MOVE THE ODD FIELD
4415 4416 4411 4418 4419 4420 4421 4422 4423 4424 4425
RI1 RIB
POP
01
POP
51
RET
ENDP
CLEAR A SINGLE ROW
PROC
"OV PUSH REP
NEAR CL,DL 01 STOSB
POI NTERS BACK RETURN TO CALLER
NUMBER OF BYTES [N FIELD SAVE POINTER STORE THE NEW VALUE
4426 4427 4428 4429 4430
POP ADD PUSH
"OV REP
01 DI,2000H 01 CL,DL STOSB
PO [NTER BACK POINT TO ODD F[ELD
FILL THE ODD F I LELD
4431 4432 4433 4434 4435 4436 4431 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4461 4468 4469 4410 447 [ 4412 4413 4474 4415 4416 4411 4418 4479 4480
POP
01
RET
RETURN TO CALLER
16
ENDP --------------------
-----------------------
GRAPH I CS WR I TE
TH [S ROUT I NE WR I TES THE ASC [[ CHARACTER TO THE
CURRENT POS I T I ON ON THE SCREEN.
ENTRY
AL '" CHARACTER TO WR I TE BL = COLOR ATTR I BUTE TO BE USED FOR FOREGROUND COLOR
IF B[T 7 [S SET, THE CHAR IS XOR'D INTO THE REGEN
BUFFER 10 I S USED FOR THE BACKGROUND COLOR) CX = NUMBER OF CHARS TO WR [TE
OS = DATA SEGMENT ES = REGEN SEGMENT
EXIT
NOTH I NG I S RETURNED
GRAPH [CS READ
TH I S ROUT [NE READS THE ASC I I CHARACTER AT THE CURRENT CURSOR POSITION ON THE SCREEN BY MATCHING THE DOTS ON
THE SCREEN TO THE CHARACTER GENERATOR CODE POINTS ENTRY
NONE I 0 [S ASSUMED AS THE BACKGROUND COLOR EXIT
AL = CHARACTER READ AT THAT POS IT] ON 10 RETURNED IF NONE FOUND)
FOR BOTH ROUT[NES, THE IMAGES USED TO FORM CHARS ARE CONTA[NED [N ROM FOR THE 1ST 128 CHARS. TO ACCESS CHARS IN THE SECOND HALF, THE USER MUST IN[T[ALIZE THE VECTOR AT INTERRUPT IFH (LOCATION 0007CH) TO POINT TO THE USER SUPPLIED TABLE OF GRAPHIC IMAGES (8X8 BOXES). FA[LURE TO DO SO WILL CAUSE IN STRANGE RESULTS
ASSUME GRAPHICS WR[TE
MOV PUSH
CS: CODE, OS: OAT A, ES: DATA
PROC
NEAR
AH,O
I ZERO TO HIGH OF CODE POINT
AX
; SAVE CODE POINT VALUE
;----- DETERMINE POSITION [N REGEN BUFFER TO PUT CODE POINTS
CALL "OV
52. DI,AX
; FIND LOCA T I ON I N REGEN BUFFER ; REGEN POINTER IN 01
---- DETERM[NE REGION TO GET CODE POINTS FROM
POP
C"P JAE
AX AL,80H 51
RECOVER CODE PO I NT I SIT 1N SECOND HALF YE5
5-160 PC-XT System BIOS (11/08/82)
LOC OBJECT
F585 BE6EFA F588 OE F589 EBOF
F58B F58B F58D F58E F590
2C80 IE 2BF6 8EDE
F592 C5367COO F5% 8CDA
F598 IF F599 52
F59A F59A F59C F59E F5AO F5A2 F5A7 F5A8
OlEO OlEO OlEO 03FO 803E490006 IF 722C
F5AA F5AA F5AB F5AC F5AE F5AE F5AF F5B2
57 56 B604
AC F6C380 7516
F5B4 F5B5 F5B6 F5B6 F5BB F5BE F5CO F5C2 F5C3 F5C4 F5C5 F5C7 F5CA F5CA F5CD F5CE F5CF F5D4
AA AC
268885FFIF 83C74F FECE 75EC 5E 5F 47 E2E3 E9FBFB
263205 AA AC 263285FF I F EBEO
F5D6 F5D6 8AD3 F5D8 DIE7 F5DA E8D I 00 F5DD F5DD 57 F5DE 56 F5DF B604 F5EI F5EI AC F5E2 E8DEOO F5E5 23C3
F5E7 F6C280 F5EA 7407 F5EC 263225 F5EF 26324501 F5F3 F5F3 268825 F5F6 26884501 F5FA AC F5FB E8C500 F5FE 23C3 F600 F6C280 F603 740A F605 2632A50020 F60A 2632850120 F60F F60F 2688A50020 F614 2688850120 F619 83C750 F61 C FECE F61E 75Cl F620 5E F621 5F F622 47 F623 47 F624 E2B7 F626 E99CFB
LINE
4461 4482 4463 4464 4485 4466 4487 4488 4469 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522
4523 4524 4525 4526 4527 4526 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583
SOURCE (B I OS FOR THE I BM PERSONAL COMPUTER XT I 1 1106/82
IMAGE IS IN FIRST HALF, CONTAINED IN ROM
MOV PUSH JMP
SI,OFA6EH CS SHORT S2
CRT CHAR GEN lOFFSET OF IMAGESI SAVE SEGMENT ON STACK ; OETERM I NE_MODE
I MAGE I SIN SECONO HALF, I N USER RAM
SI :
SUB PUSH
SUB
AL,80H OS SI, SI
MOV
OS, SI
ASSUME OS:ABSO
LOS MOV ASSUME POP PUSH
SI,EXTPTR OX,DS OS:DATA OS OX
EXTEND CHAR ZERO OR I GIN FOR SECOND HALF SAVE OATA POINTER
EST ABL I SH VECTOR ADDRESS I NG
GET THE OFFSET OF THE TABLE GET THE SEGMENT OF THE TABLE
RECOVER OAT A SEGMENT SAVE TABLE SEGMENT ON STACK
DETERMINE GRAPHICS MODE IN OPERATION
S2:
SAL
AX,I
SAL
AX, I
SAL
AX,I
ADD
SI,AX
CMP POP
CRT MOOE,6 OS
JC
57
DE TERM I NE MODE
MULTIPLY COOE POINT
VALUE BY 8
SI HAS OFFSET OF DESIREO CODES
RECOVER TABLE PO I NTER SEGMENT TEST FOR MEOIUM RESOLUTION MOOE
HIGH RESOLUTION MOOE
S3:
PUSH PUSH
01
SI
MOV
DH,4
S4:
LODSB TEST
BL ,80H
JNZ
S6
HIGH CHAR SAVE-REGEN PO INTER SAVE COOE POINTER NUMBER OF TIMES THROUGH
LOOP
GET BYTE FROM CODE PO I NTS
SHOULD WE USE THE FUNCTI ON
TO PUT CHAR IN
STOSB
LOOSB S5:
STORE I N REGEN BUFFER
MOV
ES: [01 +2000H~I] ,AL
; STORE I N SECOND HALF
ADD
01,79
MOVE TO NEXT ROW I N REGEN
DEC
OH
DONE WITH LOOP
JNZ
54
POP
51
POP
01
RECOVER REGEN PO INTER
INC
01
PO I NT TO NEXT CHAR POS I T I ON
LOOP
53
MORE CHARS TO WR I TE
JMP
V IDEO_RETURN
S6:
XOR STOSB LODSB XOR JMP
AL,ES: 101]
AL,ES: 10 I +2000H-I] 55
EXCLUS I VE OR WITH CURRENT
STORE THE CODE PO I NT
AGAIN FOR ODD FIELD
BACK TO lolA I NSTREAM
MEDIUM RESOLUTION WRITE
S7:
MOV
OL,BL
SAL
01,1
CALL
519
S8:
PUSH
01
PUSH
51
MOV
OH,4
S9:
LOOSB
CALL
521
AND
AX ,BX
TEST JZ XOR XOR SIO: MOV MOV LODSB CALL AND TEST JZ XOR XOR S11 : MOV
MOV ADO
DEC JNZ POP
POP INC INC LOOP JMP GRAPHICS_WRITE
OL,80H SID AH,ES: 1011 AL,ES: [01 + I]
ES:(DI ],AH ES:IDJ+II,AL
521 AX,BX OL ,80H 511 AH,ES:IDI+2000H] AL,ES:[DI+200IH]
ES:[DI+2000H ,AH] ES: [01 +2000H+ 1] ,AL 01,80 DH 59 51 01 01 01 58 V IDEO RETURN ENDP
MED RES WR I TE SAVE HIGH COLOR BIT OFFSET·2 SINCE 2 BYTES/CHAR EXPAND BL TO FULL WORO OF COLOR MED CHAR SAVE REGEN POINTER SAVE THE CODE PO INTER NUMBER OF LOOPS
GET CODE PO I NT
DOUBLE UP ALL THE BITS
CONVERT THEM TO FOREGROUND
COLOR ( 0 BACK I [S THIS XOR FUNCT[ON
NO, STORE IT IN AS IT IS
DO FUNCT [ON WITH HALF
AND WITH OTHER HALF
STORE FIRST BYTE
STORE SECOND BYTE
GET CODE PO I NT
CONVERT TO COLOR
AGAIN, IS THIS XOR FUNCTION
NO, JUST STORE THE VALUES
FUNCTION WITH FIRST HALF
AND WITH SECOND HALF
STORE I N SECOND PORT I ON OF BUFFER POINT TO NEXT LOCATION
KEEP GOING
RECOVER CODE PONTER
RECOVER REGEN PO INTER
PO I NT TO NEXT CHAR POS I T I ON
MORE TO WR I TE
PC-XT System BIOS (11/08/82) 5-161
LOC OBJECT
F629 F629 E8D600 F62C 8BFO F6ZE 83EC08
F631 8BEC
F633 F638 F639 F63A
803E490006 06 IF 721A
F63C B604 F63E F63E F640 884600 F643 45 F644 8A840020 F648 884600 F64B 45 F64C 83C650 F64F FECE F651 75EB F653 EBI790
F656 F656 D1E6 F658 B604 F65A Fb5A E88800
Fb5D 81 C60020 Fbbl E88100 Fbb481EEBOIF F668 FECE F66A 75EE
F66C
FbbC Fb70 F671 F672
BFbEFA90 OE
07 83ED08
F675 8BF5 F677 FC F678 BOOO Fb7A F67A 16 F67B IF F67C 8A8000 F67F F67F 56 F680 51 F681 890800 F684 F3 F685 A6 F686 5F F687 5E F688 74IE F68A FECO F68C 83C708 F68F 4A F690 75ED
F692 F694 F696 F698
3COO 7412 2BCO 8ED8
F69A C43E7COO F69E 8CCO F6AO OBC7 F6A2 7404 F6A4 8080 F6A6 E8D2
FoA8 F6A8 83C408 F6AB E917F8
LINE SOURCE 1810S FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4b09 4610 461 I 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625
4626 4627 4628 4629 4630 4631 4632 4633 4634
4635 4636 4631 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651
.- ------------
GRAPHICS READ CALL
PROC S26
MOV
SltAX
SUB
SP,8
NEAP
MOV
BP, SP
;----- DETERMINE GRAPHICS MODES
CONVERTED TO OFFSET I N REGEN SAVE IN SI ALLOCATE SPACE TO SAVE THE
READ CODE PO I NT
POINTER TO SAVE AREA
C"P PUSH POP JC
CRT MODE,6 E5
OS S'3
;----- HIGH RESOLUTION READ
PO I NT TO REGEN SEGMENT MEDIUM RESOLUT ION
;----- GET VALUES FROM REGEN BUFFER AND CONVERT TO CODE POINT
S 12:
S 13: S14:
"Ov
DH,4
"OV "Ov INC "OV "OV INC AOO DEC JNl
J"P
AL, [SI] [BP] ,AL BP AL.[SI+2000H] (BPi tAL BP S 1,80 OH 502 515
MED I UM RESOLUT I ON READ
5AL "Ov
CALL
S 1,1 DH,4
523
ADO CALL 5UB
DEC JNl
SI,ZOOOH 523 S I, ZOOOH-80 OH 504
: NUMBER OF PASSES
; GET FIRST BYTE SAVE IN STORAGE AREA NEXT LOCATION GET LOWER REG I ON BYTE ADJUST AND STORE
PO I NTER I NTO REGEN LOOP CONTROL DO IT SOME MORE GO MATCH THE SAVED CODE POINTS
MED RES READ OFFSET·Z SINCE 2 BYTES/CHAR NUMBER OF PASSES
GET PAIR BYTES FROM REGEN INTO SINGLE SAVE
GO TO LOWER REG I ON GET THIS PAIR INTO SAVE ADJUST POINTER 8ACK INTO UPPER
KEEP GOING UNTIL ALL 8 DONE
SAVE AREA HAS CHARACTER I NIT, MATCH IT
516: S 11:
"OV PUSH
POP SUB
"OV CLO "OV
PUSH POP "Ov
PUSH PUSH "Ov REPE
OI,OFFSET CRT CHAR GEN
CS
-
ES BP,8
SI,BP
AL,O
55 05 DX.128
51 01 CX,8 CMPSB
FIND CHAR
ESTABLISH ADDRESSING
CODE POINTS IN CS ADJUST POINTER TO 8EGINNING
OF SAVE AREA
ENSURE DIRECTION CURRENT CODE POINT BEING MATCHED
ESTABLISH ADDRESSING TO STACK FOR THE STRING COMPARE NUMBER TO TEST AGAINST
SAVE SAVE AREA POINTER SAVE CODE POINTER NUMBER OF BYTES TO MATCH COMPARE THE 8 BYTES
4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4614 4615 4676 4677 4618 4679 4680
POP POP JZ INC ADD
DEC JNl
01 51 51. AL 01.8 ox 517
RECOVER THE POINTERS
I F ZERO FLAG SET, NO MATCH, MOVE ON NEXT CODE POINT
LOOP CONTROL
DO ALL OF THEM
THEN MA TCH TO NEXT
OCCURRED
- CHAR NOT MATCHED, MIGHT BE IN USER SUPPLIED SECOND HALF
C"P JE
SUB
"OV ASSUME LE5
"OV OR
Jl MOV
J"P ASSUME
AL,O 518 AX, AX DS,AX OS:ABSO 01 ,EXT PTR AX,ES
AX,DI 51. AL,128
Sib DS:DATA
AL <> 0 IF ONLY 1ST HALF SCANNED IF " 0, THEN ALL HAS BEEN SCANNED
ESTABLISH ADDRESSING TO VECTOR
GET POI NTER SEE IF THE POINTER REALLY EXISTS IF ALL 0, THEN DOESN'T EXIST NO SENSE LOOKING ORIGIN FOR SECOND HALF GO BACK AND TRY FOR IT
; - - ~ - CHARACTER 1S FOUND i AL=O I F NOT FOUND )
S 18:
ADO J"P GRAPH I CS_READ
SP,8
V IDEO RETURN ENDP
REAO.JUST THE STACK, THROW AWAY SAVE ALL DONE
5-162 PC-XT System BIOS (11/08/82)
LOC 08.JECT
F6AE F6AE 80E303 F6BI 8AC3 F6B3 51 F6B4 B90300 F6Bl F6Bl DOEO F089 DOEO F6BB OA08 F68D E2F8 F6BF 8AFB F6C I 59 F6C2 C3
F6C3 F6C3 52 F6C4 51 F6C5 53 F6C6 2802 F6C8 890.100 F6C8 F6C8 8B08 F6CO 2309 F6CF 0803 F6DI OlEO F6D30lEI
F6D5 8808 F607 2309 F609 OB03 F60B OIEI
F600 F60F F6E I F6E2 F6E3 F6E4
l3EC 8BC2 58 59 SA C3
F6E5 F6E5 81.24
F6El 81.440 I F6EA 8900CO F6ED B200 FbEF F6EF 85CI F6FI F8 F6F2 740 I F6F4 F9 F6F5 0002 F6F7 01E9 F6F9 01E9
F6FB 73F2
F6FO 885600
noo 45
F70! C3
F702 F702 A I 5000 F705 Fl05 53 Fl06 8808 F708 8AC4 F70A F6264AOO F70E OlEO F710 OlEO n12 2AFF F114 03e3 F7 I 6 5B F7 I 7 C3
LINE SOURCE 18105 FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 470 I 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 471 Q 4717 4718 4719 4120 4121 4722
EXPAND MEO COLOR
THIS-ROUTINE EXPANDS THE LOW 2 81TS IN 8L TO FILL THE ENTIRE BX REGISTER ENTRY
EX J T
BL COLOR TO BE USED I LOW 2 BITS )
BX
e COLOR TO 8E USED I REPLI CAT IONS OF THE
2 COLOR B[TS I
~~;-----;R~~-
520:
AND NOV
PUSH NOV
NEAR
BL,3 AL,BL
ex
CX,3
I SOLA TE THE COLOR 81 TS COPY TO AL SAVE REG] STER
NUMBER OF TIMES TO 00 THIS
SAL SAL OR LOOP NOV POP
AL,I AL,I BL,AL 520 BH,8L
ex
LEFT SHIFT BY 2 ANOTHER COLOR VERS I ON FILL ALL OF BL FILL UPPER PORT! ON REG I STER BACK
INTO BL
RET
:- - 519
ENDP
~;~A~~ ~;~~------
ALL DONE
-------------------- --------
THIS ROUTINE TAKES THE BYTE IN AL AND DOUBLES
ALL OF THE BITS, TURNING THE 8 BITS INTO
--- I
16 8ITS. THE
~~~-----;R~~-
~~~~
R-E-S-U-L-T---IS--L-E-F--T--IN---A-X-- -------------
S22:
PUSH PUSH PUSH SUB MOV
NOV
AN~ OR
SHL SHL
DX CX 8X DX,DX CX,!
8X,AX 8X,CX OX,BX AX,I CX, I
SAVE REGI STERS
RESULT REGISTER MASK REGISTER
8ASE I NTO TEMP USE MASK TO EXTRACT A 8 I T PUT INTO RESULT REGISTER
SHIFT BASE AND MASI< BY 1
4723
NOV
8X,AX
BASE TO TEMP
4724
AND
8X,CX
EXTRACT THE SAME BIT
4725 4126
OR
DX,8X
SHL
ex, 1
PUT INTO RESULT SH' FT ONL Y MASI(; NOW.
4121
MOV I NG TO NEXT BASE
4128
JNC
522
USE !.!ASK 81T COMING OUT TO TERMINATE
4129
NOV
AX,DX
RESUL T TO PARM REG I STER
4130 4731
POP
8X
POP
ex
; RECOVER REGI STERS
4132
POP
DX
4733
RET
I ALL DONE
4134 S21
ENOP
4135 ;-----------
4736
"lEO READ BYTE
4131
- THIS ROUTINE WILL TAKE 2 8YTES FRO,,", THE REGEN
4738
BUFFER, COMPARE AGA I NST THE CURRENT FOREGROUND
4739
COLOR, AND PLACE THE CORRESPONDING ON/OFF BIT
4140
PATTERN INTO THE CURRENT POSITION IN THE SAVE
4741
AREA
4742
ENTRY
4743
SI,DS POINTER TO REGEN AREA OF INTEREST
4744
8X EXPANDED FOREGROUND COLOR
4745
BP PO I NTER TO SAVE AREA
4746
EXIT
4747 ;
BP I S INCREMENT AFTER SAVE
4148 ~~~-----;R~~----~E~~------------------------------------4149
4750 415 I
MOV MOV
AH, [SI]
AL, [S I + 1I
eET FIRST BYTE
GET SECOND BYTE
4752
MOV
CX,OCOOOH
2 81T MASK TO TEST THE ENTRIES
4753
MOV
DL,O
RESULT REGISTER
4754 524 :
4755
TEST
AX,CX
15TH 1S SECT I ON BACKGROUND?
4756
eLe
CLEAR CARRY IN HOPES THAT IT IS
4757
OZ
525
IF ZERO, IT IS BACKGROUND
4758
STe
WASN'T, SO SET CARRY
4759 S25:
ReL
DL,I
,,",OVE THAT 81 T INTO THE RESULT
4760
SHR
CX,I
4161
SHR
CX, I
MOVE THE MASK TO THE RIGHT 8Y 2 81 TS
4162
JNe
52.
DO IT AGAIN IF MASK DIDN'T FALL OUT
4163 4164
"OV INC
[BP] ,DL 8P
STORE RESULT IN SAVE AREA ADJUST POINTER
4765
RET
ALL DONE
4166 4767
523
; --
-
-
-
-
- E-N- O- -P
4768 ; V4 POSITrON
4769
-
THIS ROUTINE TAKES THE CURSOR POSITION
4110
CONTAINED IN THE MEMORY LOCATION, AND
4771
CONVERTS I T I NTO AN OFFSET I NTO THE
4112
REGEN BUFFER, ASSUMING ONE BYTE/CHAR.
4113
FOR MEDIUM RESOLUTION GRAPHICS,
4774
THE NUMBER MUST 8E DOUBLED.
4775
ENTRY
4776
NO REGISTERS, MEMORY LOCATION
4117
CURSOR_POSN I S USED
4778
EX I T
4779
AX CONT A I NS OFFSET [NTD REGEN BUFFER
4780
4781
PROC
NEAR
4182
"OV
4183 GRAPH POSN
AX,CURSOR POSN LABEL NEAR
I GET CURRENT CURSOR
4784
- PUSH
8X
; SAVE REGISTER
4185 4786 4787 4788
"OV "OV
"UL SHL
BX,AX AL,AH BYTE PTR AX,I
CRT_COLS
; SAVE A COPY OF CURRENT CURSOR
; GET ROWS TO AL
I MUL T! PL Y BY BYTES/COLUMN
; Io4UL TI PLY 4 SINCE 4 ROWS IBYTE
4789
SHL
AX, I
4790
SU8
8H,BH
150LATE COLUMN VALUE
4791
ADD
AX,BX
OETERMI NE OFFSET
4792
PDP
8X
RECOVER PO INTER
4793
RET
ALL DONE
4794 526
ENDP
PC-XT System BIOS (11/08/82) 5-163
LaC OB..JECT
Fl16 Fll6 50 F119 50 F11A B403 F11C 6A3E6200 F120 COlO Fl22 56
F123 F125 F121 F129 F12B F120 F12F F131
3C08 1452 3COO 1451 3COA 1451 3COl 1451.
F733 B40A Fl35 B90100 Fl38 COlO
F13A FEC2 F13C 3A I 641.00 F140 1533 F142 B200 F144 80FE 18 F141 152A
F749 F149 B402 F14B COlO
FHO A04900 Fl50 3C04 Fl52 1206 F154 3COl F156 8100 F158 1506 F15A F15A 8408 F15C COlO F15E 8AFC F160 Fl60 880 I 06 F163 28C9 F765 B618 F161 8AI64AOO F16B FECA F160 F160 COlO F16F Fl6F 58 Fno E952FA F113 F113 FEC6 F115 F115 B402 Fl11 EBF4
F119 F119 80FAGO F11C HFl FllE FECA F180 EBF3
F782 F782 B200 F184 EBEF
F186 F186 80FEI8 F189 15E8 F18B EBBC
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XT) 11{08{82
4795 4196 4197 4198 4199 4800 4601 4802 4803 4804 4805 4806 4601 4808 4809 4610 4811 4812 4813 4814 4815 4816 4811 4818 4819 4820 4821 4822 4823 4824 4825 4826 4821 4828 4829 4830 4831 4832 4833 4834 4835 4836
4831 4838 4839 4840 4841 4842 4843 4844 4845 4846 4841
4848 4849 4850 4851 4852 4853 4e54 4855 4856 4851 4858 4859 4860 4861 4862 4863 4864 4865 4866 4861 4868 4869 4810 4811 4812 4813 4814 4815 4876 4811 4818 4819 4660 4881 4882 4883 4884 4885 4886 4881 4888 4689 4890 4891 4892 4893 4894 4895 4896 4891 4898 4899 4900 4901
4902 4903 4904 4905 4906 4901 4908
WRITE TTY
-THIS INTERFACE PROVIDES A TELETYPE LIKE INTERFACE TO THE VIDEO
CARD. THE ! NPUT CHARACTER IS WR ITTEN TO THE CURRENT CURSOR
POS I T I ON, AND THE CURSOR 15 MOVED TO THE NEXT POS I T I ON. I F THE
CURSOR LEAVES THE LAST COLUMN OF THE FIELD, THE COLUMN 15 SET
TO ZERO, AND THE ROW VALUE IS INCREMENTED. IF THE ROW VALUE
LEAVES THE FIELD, THE CURSOR IS PLACED ON THE LAST ROil, FIRST
COLUMN, AND THE ENT I RE SCREEN I S SCROLLED UP ONE LI NE. WHEN
THE SCREEN IS SCROLLED UP, THE ATTRIBUTE FOR FILLING THE NEWLY
BLANKED LINE I S READ FROt.4 THE CURSOR POS IT! ON ON THE PREV 1OUS
LINE BEFORE THE SCROLL, I N CHARACTER MODE. I N GRAPH I CS MODE,
THE a COLOR I S USED.
ENTRY
= I AH)
CURRENT CRT MOOE
I AL) = CHARACTER TO BE WR 1TTEN
NOTE THAT BACK SPACE. CAR RET, BELL AND LINE FEED ARE HANDLED
AS COMMANDS RATHER THAN AS 0 I SPLA YABLE GRAPH I CS I BL I = FOREGROUND COLOR FOR CHAR WR I TE IF CURRENTLY I N A
GRAPHICS MODE
EX IT
ALL REGI STERS SAVED
ASSUME WRITE TTY
- PUSH
PUSH MOV
"OV INT POP
CS: CODE, OS: DA T A
PROC
NEAR
AX AX AH,3
BH,ACTIVE PAGE
10H
-
AX
SAVE REG I STERS SAVE CHAR TO WR I TE
GET THE CURRENT ACT I VE PAGE READ THE CURRENT CURSOR POSITION RECOVER CHAR
OX NOW HAS THE CURRENT CURSOR POS I T ION
C"P JE
C"P JE
C"P JE
C"P JE
AL,8 U6 AL,OOH U9 AL,OAH U I 0 Al,OlH UII
I SIT A BACKSPACE BACK SPACE I S IT CARRIAGE RETURN CAR RET 1S IT A LINE FEED
LINE FEED IS IT A BELL BELL
1 -- WRITE THE CHAR TO THE SCREEN
"OV
"OV INT
AH, 10 CX, I 10H
WR I TE CHAR ONLY ONl Y ONE CHAR WR I TE THE CHAR
;----- POSITION THE CURSOR FOR NEXT CHAR
INC
OL
C"P
DL,BYTE PTR CRT_COlS
JNZ
UT
"0'
OL.O
C"P
OH,24
JNZ
Ub
TEST FOR COLUMN OVERFLOW SET CURSOR COLUMN FOR CURSOR
SCROLL REQU 1RED
UI:
"0'
AH,2
INT
10H
; SET THE CURSOR
;----- DETERMINE VALUE TO FILL WITH DURING SCROLL
U2: U3:
U4: US: U6; U7:
MOV C"P JC C"P "OV JNE
"OV INT
"OV SUB "OV
"0'
DEC
INT
POP J"P
INC
"OV J"P
Al,CRT_MODE AL,4
U2 AL,7 BH,O U3
AH,8 10H BH,AH
AX,60IH CX ,CX OH,24 OL.BYTE OL
PTR
CRT COlS
10H
AX VIDEO_RETURN
OH
AH,2 U4
; ----- BACK SPACE FOUND
I GET THE CURRENT MODE
REAO-CURSOR
FILL WITH BACKGROUNO SCROLL-UP READ-CURSOR
READ CHAR I ATTR AT CURRENT CURSOR STORE IN BH SCROLL-UP SCROll ONE LINE UPPER lEFT CORNER LOWER RIGHT ROW lOWER RIGHT COLUMN
V 10EO-CALL-RETURN SCROLL UP THE SCREEN TTY-RETURN RESTORE THE CHARACTER RETURN TO CALLER SET-CURSOR- INC NEXT ROW SET-CURSOR
; EST ABl I SH THE NEW CURSOR
U8:
C"P
DL,O
JE
UT
OEC
DL
J"P
UT
- CARR I AGE RETURN FOUND
U9:
"OV J"P
OL,O UT
;----- LINE FEED FOUND
ALREADY AT END OF LINE
=- SET CURSOR
NO
..JUST t.40VE 1T BACK
SET _CURSOR
MOVE TO FIRST COLUMN
SET_CURSOR
UIO:
C"P JNE
J"P
DH.24
Ub UI
BOTTOM OF SCREEN YES, SCROLL THE SCREEN NO, ..JUST SET THE CURSOR
5-164 PC-XT System BIOS (11/08/82)
LOC 08JECT
F780 n80 830Z F78F E8160Z F19Z E808
F194 F194 03 F195 03 F196 05 F797 05 F198 03 F199 03 F79A 03 F798 04 F19C
F79C 8400 F79E 8BI66300 F7A2 83C206 F7A5 EC
F1A6 A804 F1AB 151E
F1AA A80Z F1AC 1503 F1AE E98100
F1BI F1B! B410
F183 B8166300 FlB7 8AC4 F189 EE F18A 42 F1BB EC F1BC 8AE8 F18E 4A F78F FEC4 F7C 1 8AC4 F1C3 EE F7C4 42 F1C5 EC F1C6 8AE5
F7C88A1E490Q F7CC ZAFF F 7CE 2E8A9F94F1 F103 2BC3 F105 881E4EOO F109 DIEB F70B 2BC3 F100 7902 F10F 2BCO
F7EI F7EI F1E3 F1E8 F1EA F7EF
BI03 803E490004 122A 803E490001 7423
F7F I 8228 F7F3 F6F2
F1F5 8AE8 F1F1 02ED F1F9 8ADC F7FB 2AFF F7FO 803E490006 F802 7504 F8D4 BI04 F806 DOE4 Feoe
FeDe D3E3
LINE
4909
4910 491 I 4912 4913 4914 4915 4916 4911 4918 4919 4920 4921 4922 4923 4924 4925 4926 4921 4928 4929 4930 4931 4932 4933 4934 4935
SOURCE ~BIOS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
BELL FOUND
UI I:
MOV
BL,2
CALL
BEEP
JMP
U5
WR I TE TTY
ENDP
;-----=-- ----------
SET UP COUNT FOR BEEP SOUND THE POD BELL TTY_RETURN
; LIGHT PEN
THIS ROUTINE TESTS THE LIGHT PEN SWITCH AND THE LIGHT
I
PEN TRIGGER. IF BOTH ARE SET, THE LOCATION OF THE LIGHT
;
PEN IS DETERMINED. OTHERWISE, A RETURN WITH NO
;
I NFORMAT I ON I S MADE.
; ON EX I T
:
I AHI = 0 IF NO LIGHT PEN [NFORMATION IS AVAILABLE
;
ex, CX · OX ARE DESTROYED
IAHI = I IF LIGHT PEN [S AVAILABLE
I DH, DL) :::: ROW, COLUMN OF CURRENT LIGHT PEN
POSITION
(CHI:::: RASTER POSITION
leXI :::: BEST GUESS AT PIXEL HORIZONTAL POSITION
ASSUME CS:CODE,DS:DATA
v,
SUBTRACT TABLE LABEL BYTE
DB
3,3,5,5,3,3,3,4
4936 4931 4938 4939 4940 4941 4942 4943
4944 4945 4946 4941 4948 4949 4950 4951 4952 4953 4954 4955 4956 4951 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4910 4911 4972 4973 4914 4915 4976 4971 4918 4919 4980 498 I 4982 4983 4984 4985 4986 4981 4988 4989 4990 4991 4992 4993 4994 4995 4996 4991 4998 4999 5000 5001 5002 5003 5004 5005 5006 5001 5008 5009
50 I a
5011 5012
PROC
NEAR
-- WAIT FOR LIGHT PEN TO BE DEPRESSED
MOV MOV ADD IN
TEST JNZ
AH,O OX, AoDR 6845 DX,6
AL,DX
AL,4 Vb
;----- NOW TEST FOR LIGHT PEN TRIGGER
SET NO LI GHT PEN RETURN CODE GET 8ASE ADDRESS OF 6845 POINT TO STATUS REGISTER GET STATUS REGISTER
TEST LIGHT PEN SWITCH NOT SET. RETURN
TEST JNZ JMP
Al,2 V1A
V7
TEST LIGHT PEN TR I GGER RETURN 'II I THOUT RESETT I NG TR I GGER
1----- TRIGGER HAS BEEN SET, READ THE VALUE IN
V1A:
MDV
AH,16
; LIGHT PEN REG I STERS ON 6845
I NPUT REGS PO I NTED TO BY AH, AND CONVERT TO ROW COLUMN I N OX
MOV
MOV
OUT INC IN MOV DEC INC MDV
OUT INC IN MOV
OX, AD DR 6845 AL, AH -
OX ,AL DX Al,OX CH,AL DX AH AL,AH OX ,AL OX Al,DX
AH,CH
ADDRESS REGI STER REGISTER TO READ SET IT UP DATA REGISTER GET THE VALUE SAVE IN CX ADDRESS REGJ STER
FOR
6845
SECOND DATA REGI STER
POINT TO DATA REGISTER GET SECOND DATA VALUE AX HAS INPUT VALUE
AX HAS THE VALUE READ I N FROM THE 6845
MOV SUB MOV SUB MOV SHR SUB
JNS SUB
BL,CRT MODE BH,BH BL.CS;VI (BX] AX,BX BX,CRT START BX, 1 AX,BX V2 AX,AX
- - - DETERM I NE MODE OF OPERAT I ON
MODE VALUE TO BX DETERM' NE AMOUNT TO SUBTRACT TAKE [T AWAY
IF POSITIVE, DETERMINE MODE <0 PLAYS AS 0
V2:
MOV
CL,3
CMP JB
CRT MODE, 4 V4
eMP JE
CRT MODE, 1 V4
OETERM I NE MODE SET -8 SHIFT COUNT DETERMINE IF GRAPHICS OR ALPHA ALPHA_PEN
ALPHA_PEN
GRAPHICS MODE
MOV 01 V
Dl.40 DL
- DETERMINE GRAPHIC ROW POSIT[ON
DIVISOR FOR GRAPHICS DETERMINE ROW~AU AND COLUMNIAHI
Al RANGE 0-99, AH RANGE 0-39
MOV
CH,AL
ADD
CH,CH
MOV SUB
BL,AH BH,BH
CMP JNE
CRT MQOE,6 V3
MOV
Cl.4
SAL
AH,I
V3:
SHL
BX ,CL
SAVE ROW VALUE IN CH -2 FOR EVEN/ODD F[ElD COLUMN VALUE TO BX MULTIPLY BY 8 FOR MEDIUM RES DETERMINE MEDIUM OR HIGH RES NOT HIGH RES
SHIFT VALUE FOR HIGH RES COLUMN VALUE TIMES 2 FOR HIGH RES NOT HIGH RES MULTIPLY--16 FOR HIGH RES
PC-XT System BIOS (11/08/82) 5-165
LOC 08JECT
F60A FBoe F80E F810 F8f2
6A04 8AFO DOEE DOEE EB 12
F814
F814 Fb364AOO
F8'8 8AFO F81A 8AD4 F81C 02EO F81E 8AE8 F820 8ADC F822 32FF F824 03E3 F826
F826 8401 F828 F828 52 F829 B8166300 F6ZD 63C201 F830 EE F631 5A F832 F832 5F F633 5E F834 IF FB35 IF FB36 IF F837 IF FB38 OT F839 CF
LINE SOURCE {BIOS FOR THE IBM PERSONAL COMPUTER XTI 11108/82
5013 5014 5015 5016 50 I 7 50 I 8 50 I 9 5020 5021 5022 5023 5024 5025 5026 5021 5026 5029 5030 5031 5032 5033 5034 5035 5036 5037 5036 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049
5050
;--
DETER!.! I NE ALPHA CHAR POSITION
"OV MOV SHR SHR
JMP
Ol,AH OH,AL OH, ,
DH,' SHORT V5
ALPHA MODE ON LIGHT PEN
V4: DIV
"OV
"OV SAL
"OV
"OV XDR
SAL V5;
"OV Vb:
PUSH MOV
ADO
V7 :
OUT POP
POP
POP
POP
POP POP
POP POP
IRET
READ_LPEN
BYTE PTR DH,AL DL,AH AL,CL CH,AL BL.AH BH,SH 8X,Cl
CRT~COLS
AH, I
OX DX,ADOR_6645 OX ,1 DX,AL OX
01 51 OS OS D5
OS ES
ENOP
COLUMN VALUE FOR RETURN ROW VALUE DIVIDE 8Y 4
FOR VALUE IN 0-24 RANGE LIGHT_PEN_RETURN~ SET
ALPHA PEN DETERM I NE ROW. COLUMN VALUE ROWS TO DH COLS TO DL MULTIPLY ROWS 8 GET RASTER VALUE TO RETURN REG COLUMN VALUE
TO 8X
LIGHT PEN RETURN SET I NO I CATE EVERTH 1NG SET LIGHT PEN RETURN SAVE RETURN VALUE {INCASE) GET BASE ADDRESS POINT TO RESET PARM ADDRESS, NOT DATA, IS IMPORTANT RECOVER VALUE RETURN_NO_RESET
01 SCARD SAVED BX,CX,DX
5-166 PC-XT System BIOS (11/08/82)
LOC 08.JECT
F8-4 I F8-41 F84 I F8 F842 IE F843 E81302 F64b 1.11300 F649 1F F64A CF
F640 F640 F640 F8 F64E IE F64F E60702 F652 1.11000 F855 IF F856 CF
F859 F859 F659 F9 F65A 846b F65C CA0200
L [NE SOURCE 1810S FOR THE IBM PERSONAL COMPUTER XT I 1 1 /08/82
5051 5052 5053 5054 5055 5056 5051
5056 5059 50bO 506 [ 5062 5063 506450b5 5066 5061 5066 5069 5010 5011 5012 5013 5014 5015 5016 5011 5018 5019 5060 5081 5082 5083 5084 50B5 5086 5081 50BB 50B9 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5101 5108 5109 5110 5111 5112 5113 5114 5115 5 I 10 51 11 5116 5119 5120 5121 5122 5123 5124
5125 5126 5127 5128 5129 5130 5131 5 t 32 5133 5134 5135 5136 5131
-- [NT 12 ----------------
MEMOR Y SIZE DET TH I S ROUT I NE DETERM I NES THE AMOUNT OF MEMORY I N THE SYSTEM AS REPRESENTED BY THE SWITCHES ON THE PLANAR. NOTE THAT THE SYSTEM MAY NOT 8E A8LE TO USE [/0 MEMORY UNLESS THERE I S A FULL COMPLEMENT OF 64K BYTES ON THE PLANAR.
INPUT
NO REG I STERS THE MEMORY SIZE VAR I ABLE I S SET OUR I NG POWER ON D I AGNOST I CS
ACCORDING-TO THE FOLLOWING HARDWARE ASSUMPTIONS:
PORT 60 BITS 3,2 = 00 - 16K BASE RAM
01 - 32K BASE RAM 10 - 46K BASE RAM 1 I - 64K BASE RAM PORT 62 Bl TS 3-0 INDICATE AMOUNT OF I/O RAM IN 32K INCREMENTS E.G., 0000 - NO RAM IN 1/0 CHANNEL 0010 - 64K RAM IN I/O CHANNEL, ETC. OUTPUT lAX) = NUMBER OF CONTIGUOUS IK BLOCKS OF MEMORY
ASSUME CS:CODE,DSIDATA
ORG
OFB41H
MEMORY SIZE DET PROC - STI
FAR
PUSH CALL OOV POP IRET MEMORY_SIZE_DET
OS DDS AX,MEMORY OS
ENDP
SIZE
I NTERRUPTS BACK ON SAVE SEGMENT
GET VALUE RECOVER SEGMENT RETURN TO CALLER
;--- INT 11 -------------- ------------------------------------- EQUIPMENT DETERMINATION THIS ROUTINE ATTEMPTS TO DETERMINE WHAT OPTIONAL
DEVICES ARE ATTACHED TO THE SYSTEM. INPUT
NO REGISTERS THE EQUIP FLAG VARIABLE IS SET DURING THE POWER ON DIAGNOSTICS USING THE FOLLOWING HARDWARE ASSUMPTIONS: PORT 60 = LOW ORDER BYTE OF EQUPMENT PORT 3FA = INTERRUPT 10 REGI STER OF B250
BITS 1-3 ARE ALWAYS 0 318 = OUTPUT PORT OF PRINTER -- B255 PORT THAT
CAN BE READ AS WELL AS WR I TTEN OUTPUT
lAX) IS SET, BIT SIGNIFICANT. TO INDICATE ATTACHED I/O BIT 15,14 = NUMBER OF PRINTERS ATTACHED BIT 13 NOT USED BIT 12 = GAME I/O ATTACHED BIT 11,10,9 = NUMBER OF RS232 CARDS ATTACHED BIT 8 UNUSED BIT 1,6 = NUMBER OF DISKETTE DRIVES
00=1,0[=2. 10=3, 11=4 ONLY IF BIT 0 = 1 BIT 5,4 = INITIAL VIDEO MODE
00 - UNUSED 01 - 40X25 BW US I NG COLOR CARD 10 - 80X25 BW US [NG COLOR CARD
11 - 60X25 BW US ING BW CARD BIT 3,2 = PLANAR RAM SIZE 100=16K,OI",32K,IO=46K,II=64K) BIT 1 NOT USED BIT 0 '" IPL FROM DISKETTE -- TH[S BIT INDICATES THAT
THERE ARE 0 I SKETTE DR I VES ON THE SYSTEM
NO OTHER REGISTERS AFFECTED
ASSUME
ORG EQUIPMENT
STI PUSH
CALL NOV POP I RET EQU IPMENT
CS: CODE, OS: DATA
OFB4DH
PROC
FAR
OS
DDS
AX,EQUIP FLAG
OS
-
ENDP
I NTERRUPTS BACK ON SAVE SEGMENT REG I STER
GET THE CURRENT SETT I NGS RECOVER SEGMENT RETURN TO CALLER
;-- INT 15 -----------
-------------------------------------
;
DUMMY CASSETTE 10 ROUTINE-RETURNS 'INVALID CMD' IF THE ROUTINE IS :
IS EVER CALLED BY ACCIDENT IAH=6bH, CARRY FLAG:I)
ORG CASSETTE 10
STC OOV RET CASSETTE_IO
OF859H
PROC
FAR
AH,86H
2 ENDP
; CARRY INDICATOR=I
PC-XT System BIOS (11/08/82) 5-167
LaC OB.JECT
F85F
F85F 50 F660 E46<' F862 A8CO F864 1503 F866 E98100 F869 F869 BA4000 F86C 8EDA F86E BE 15F990 F872 ,1,840 F874 1504 F876 BE25F990 F87A F87A B400 F87C ,1,04900 F87F COlO F881 E8460 I
F884 BOOO F886 E6AO F886 E461 F88A OC30 F88C E661 F88E 24CF F890 E66 \
FB'128BIE1300 F896 FC F897 2BD2 F899 F899 8EDA F89B 8EC2 F89D B90040 F8AO 2BF6
F8A2 F3 F8A3 AC F8A4 E462 F8A6 24CO F8AB 7512 F8AA 8 \ C20004 FBAE 83EB10 F8Bl 75E6 F8B3 BE35F990 FBB7 E81 00 I FBBA FA FBBB F4 F8BC FBBC 8CDA F8BE E81907 F8CI BAI302 FBC4 BOOO F8C6 EE F8C7 B028 F8C9 E8DOOO F8CC 885AA5 F8CF 88C8 F8DI 2BD8 F8D3 8907 FBD5 90 F8D6 90 F8D7 8B07 F8D9 3BC 1 FBDS 1407 F8DD B045 F8DF E8BAOO FBE2 EB05 F8E4 F8E4 B053 F8E6 E8B300 FBE9 FBE9 B029 F8EB E8AEOO F8EE FA F8EF F4 F8FO FBFO 58 FBF I CF
F8F2 FeF2 FBF5 FBF5 F8F7 F8F7 F8F9 FBFA FBFC F8FE
B90020
32CO
0207 43 E2FB OACO C3
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XTJ 11/08/82
----- -- 5138
5139 ;
-- ----- ------ ------ - - ------- --- -- --- - -
5140 ; NON-MA sKABLE I NTERRUPT RouT I NE:
5141 ; 5142
THIS ~OUTINE WILL PRINT A PAR[TY CHECK 1 OR 2 MESSAGE:
AND ATTEMPT TO FIND THE STORAGE LOCATION CONTAINING THE
5143 5144
BAD PAR J TY · I F FOUND, THE SEGMENT ADDRESS WI LL BE PRINTED. IF NO PARITy ERROR CAN BE FOUND IINTERMITTANT
5145
READ PROBLEM) ????1<-WILL BE PR[NTED WHERE THE ADDRESS
5146
WOULD NORMALLY GO.
5147 5148
IF ADDRESS IN ERROR IS IN THE [/0 EXPANSION BOX, THE ADDRESS WILL BE FOLLOWED BY A · (E)', IF IN SYSTEM UNIT,
- -- ----------- 5149
5150 515 I
A '( S I ' WI LL FOLLOW THE ADDRESS ~~ ~ ~ ~~-~~~c ~ -~~~~--
5152
-
ASSUME DS:DATA
5153 5154
PUSH IN
AX AL,PORT C
SAVE OR I G CONTENTS OF AX
5155 5156
TEST ,JNZ
AL.OCOH NMI I
PAR I TY CHECK?
5157 5158
,JMP
014
NO, EXIT FROM ROUTiNE
5159 5160 5161 5162
5163 5164 5165
DI3r
"DV
"DV "OV TEST eNZ
"DV
OX ,DATA OS,OX S I ,OFFSET 01 AL,40H 013 51 ,OFFSET 02
ADDR OF ERROR MSG
I/O PAR I TV CHECK
DISPLAY ERROR "SG MUS T BE PLANAR
5166 5167 5 I 68 5 I 69 5170
MDV MDV INT CALL
AH,O AL,CRT_MOOE IDH P _MSG
INIT AND SET MODE FOR VIDEO
CALL VIDEO 10 PROCEDURE PRINT ERROR MSG
5171 :----- SEE IF LOCATION THAT CAUSED PARITY CHECK CAN BE FOUND 5172
5173 5114
MOV OUT
AL,OOH OAOH,AL
o I SABLE TRAP
5175
IN
AL,PORT B
5176 5171
OR OUT
AL,OOll'O0008 PORT B,AL
TOGGLE PARITY CHECK ENABLES
5178
AND
AL, lioOll1 1B
5179
OUT
PORT B, AL
5180 5181 5182 5183
NMI
"DV CLD SuB
LOOP:
BX,MEMORY SIZE OX,DX
GET MEMORY SIZE WORD SET 0 I R FLAG TO I NCR I MENT POINT OX AT START OF MEM
5184
-
MOV
DS,DX
5 I 85 5 I 86 5187
5188 5189
MOV MOV SUB
REP
ES,DX CX,4000H SI,SI
Loose
SET FOR 16KB SCAN SET S I TO BE REAL T I VE TO START OF ES
READ 16KB OF MEMORY
5190 5191
IN AND
AL,PORT C AL, I 1000000B
5192 5193
..INZ ADD
PRT NMI OX,0400H
5194
SUB
BX,160
5195
..INZ
NMI LOOP
5196 5191
MOV CALL
S I, (OFFSET D2A I P _MSG
5198
CLI
5199
HLT
5200 PRT NM':
520 I
-
MOV
DX,DS
5202
CALL
PRT SEG
5203 5204 5205
MDV MOV OUT
DX,'0213H AL,OO
ox, AL
5206
"DV
AL.' {'
5201
CALL
PRT HEX
5208
MDV
AX, OA55AH
5209 52 I 0 5211
MDV
SUB MOV
CX,AX BX,BX
(BX I, AX
5212
NDP
5213
NDP
5214 5215 5216
MDV CMP ..IE
AX,IBX] AX,CX SYS BOX_ERR
52 \ 7 5218
"DV CALL
AL,'E' PRT HEX
5219
eMP
SHORT HLT _NM I
5220 SYS sox ERR:
5221
-
-MOV
AL. 'S'
5222
CALL
PRT_HEX
5223 HLT NMI:
5224
-
MOV
AL,') ·
5225
CALL
PRT_HEX
5226
CLI
5227
HLT
5228 014:
5229
PDP
AX
5230
IRET
5231 NMI_INT ENDP
5232
5233 ; ------------
--- - ---- 5234 ;
ROS CHECKSUM SUBROUTiNE
5235 5236
~~~~C~~CK;~~
~~;c
N~~~ --- - - - ---
5237
MOV
CX,8192
5238 ROS CHECKSUM CNT:
5239
-
XOR -
AL,AL
5240 C26:
5241
AOD
AL,OS: IBX]
5242
INC
BX
5243 5244
LOOP DR
C26 AL,AL
5245
RET
5246 ROS_CHECKSUM
ENDP
SEE IF PARITY CHECK HAPPENED GO PRINT ADDRESS IF IT DID PO I NT TO NEXT 16K BLOCK
PRINT ROW OF 711'? IF PARITY CHECK COULD NOT BE RE-CREATED HALT SYSTEM
PR I NT SEGMENT VALUE
o I SABLE EXPANS I ON BOX
(CAN'T WRITE TO MEM)
WR I TE A WORD TO SEGMENT THAT
HAD THE ERROR I S IT THERE7 YES- MUST BE SYS UNIT NO-MUST BE IN EXP. BOX
H,I..LT SYSTEM
RESTORE OR J G CONTENTS OF AX
: NEXT ROs MODULE ; NUMBER OF BYTES TO ADD ; ENTRY FOR OPTIONAL ROS TEST
PO I NT TO NEXT BYTE ADO ALL BYTES IN ROS MODULE SUM = 07
5-168 PC-XT System BIOS (11/08/82)
LOC 08JECT
F8FF 313031 F902 00 F903 OA F904 20323031 F908 00 F909 OA F90A 524F4D F90D OD F90E OA F90F 31383031 F913 00 F914 OA F915 50415249545920
43484543482032 F923 00 F924 OA F925 50415249545920
43484543482031 F933 00 F934 OA F935 3F3F3F3F3F F93A 00 F938 OA
F93C F93C F8 F93D 50 F93E E461 F940 8AEO F942 F600 F944 2440 F946 80E4BF F949 OAC4 F94B E661 F940 8020 F94F E620 F951 58 F952 CF
F953
F953
884000 F956
8ECO F958
2AE4 F95A
8A4702 F950
8109 F95F
D3EO F96 \
88Ca F963
51 F964
890400 F967
03E8 F969
0300 F968
59 F96C
E886FF F96F
7406 F911
E851EO F914
E81490 F911
F911
52 F918
26Cl0661000300 F97F
268C IE6900 F984
26FF 1E6100 F989
5A F98A
F98A
C3
F988 F988 50
F98C 8104
F98E D2E8
F990 E80300
F993 58
F994 240F
F996 F996 0490
F998 27
F999 1440
F998 27
F99C F99C 840E
F99E 8700
F9AO COlO
F9A2 C3
F9 ... 3 F9A3 F9A5 F9A7 F9A9
8C03 7803 7802
LINE SOURCE 18105 FOR THE IBM PERSONAL COMPUTER XTI 11108182
5241 5248 5249
5250
; --------------- - - - - - - - - ----- - - -- - ------
I
MESS ...GE AREA FOR POST
,-----------
---------------------
EO
08
' 101',13, 10
SYSTEM BO...RD ERROR
5251 EI
DB
20 \ ' , 13,10
MEMORY ERROR
5252 F3A
DB
'ROM',13,IQ
ROM CHECK SUM ERROR
5253 F3e
08
'1801'.13. I 0
EXPANSION 10 BOX ERROR
5254 01
08
'PARITY CHECK 2' ,13, 10
5255 D2
08
'PARITY CHECK 1'.13, I Q
5256 o2A
08
· ?????'. 13.10
5257
5258
5259
BL I NK LEO PROCEDURE FOR MFG RUN- I N TESTS
5260 ;
IF LED (5 ON, TURN IT OFF. IF OFF, TURN ON.
5261 I - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
5262
ASSUME OS:OATA
5263 BLINK INT
PROC
NEAR
5264
- STI
5265
PUSH
AX
SAVE AX REG CONTENTS
5266
IN
AL.PORT B
READ CURRENT VAL OF PORT B
5267
"OV
AH ....L
5268
NOT
AL
FLIP ...LL BITS
5269
AND
AL,OIOOOOOOB
ISOL"'TE CONTROL BIT
5270
AND
AH, 10 I I I I I IB
MASK OUT OF ORIGINAL VAL
5271
DR
"'L,AH
OR NEW CONTROL BIT (N
5212
OUT
PORT B,AL
5273 5274
"DV OUT
AL,EOI INTAOO,AL
5275
PDP
AX
RESTORE AX REG
5276
IRET
5211 BLINK INT
ENOP
5278
; 5219
5280
-~~~s- ~~~~~ ~~-~~~~~SUMS ~;~~~~~~ - R~~-~~~~~~s-~~~--------
5281 ; IF CHECKSUM IS OK, CALLS INITITEST CODE IN MODULE
- --- -- ---- 5282
5283
~~~
~~~~;
---~R~C --~~~R------
5284
-
MOV
AX,DATA
; POINT ES TO DATA AREA
5285
MOV
ES.AX
5286
SUB
AH,AH
ZERO OUT AH
5287
MOV
AL, [BX+2)
GET LENGTH I NO I CA TOR
5288
MOV
CL,09H
MULTIPLY BY 512
5289
SHL
AX.CL
5290 5291
MOV PUSH
CX,AX
cx
SET COUNT
SAVE COUNT
5292
"DV
CX,4
ADJUST
5293
SHR
AX,CL
5294 5295
ADD
OX,AX
PDP
ex
SET PO I NTER TO NEXT MODULE
RETR I VE COUNT
5296
CALL
ROS CHECKSUM CNT
00 CHECKSUM
5297 5298
JZ CALL
ROM-CHECK 1 ROM-ERR -
POST CHECKSUM ERROR
5299
J"P
5300 ROM CHECK 1;
ROM::::CHECK_ENO
AND EX I T
5301
-
PUSH
OX
SAVE POINTER
5302 5303
"DV "OV
ES: 10 ROM lNIT,0003H ES: 10-ROM-SEG,oS
LOAD OFFSET
; LOAD SEGMENT
5304 5305
CALL PDP
DoxWORD-PTR-ES: 10- ROM INIT
; CALL INIT.ITEST ROUTINE
5306 ROM CHECK END:
5301
-
RET
RETURN TO CALLER
5308 ROM_CHECK
ENDP
5309
5310 1------ - - - -- - -~~-- -- - - - ----- - - ---------------
5311 I CONVERT AND PR I NT ASC I I CODE
:
5312 ;
AL MUST CONTAIN NUMBER TO 8E CONVERTED. :
5313 1
AX AND BX DESTROYED.
I
5314 1----- ---- ----- - - - - - - - - - - --- - - -- ----------------
5315 XPC BYTE
PROC
NEAR
5316
-
PUSH
AX
SAVE FOR LOW NIBBLE DISPLAY
5311
MDV
CL.4
SHIFT COUNT
5318
SHR
AL,CL
NYBBLE SWAP
5319
CALL
XLAT_PR
DO THE HIGH NIBBLE DISPLAY
5320
PDP
AX
RECOVER THE NIBBLE
5321
AND
AL,OFH
I SOLATE TO LOW NIBBLE
5322
FALL INTO LOW NIBBLE CONVERSION
- 5323 XLAT PR PROC
5324
ADD
NEAR AL ,090H
CONVERT OO-OF TO ASCI I CHARACTER
ADD FIRST CONVERSION FACTOR
5325
oAA
ADJUST FOR NUMER 1C AND ALPHA RANGE
5326
Aoe
AL,040H
ADD CONVERSION AND ADJUST LOW NIBBLE
5327
oAA
ADJUST HIGH NI88LE TO ASCHI RANGE
5328 5329 5330 5331
- PRT HEX PROC "DV
"OV INT
NEAR AH,14 BH,O 10H
01 SPLA Y CHARACTER
5332
RET
5333 PRT HEX ENDP
5334 XLAT PR ENOP
5335 XPCJ3YTE
ENDP
5336
5337
LABEL WORD
PR I NTER SOURCE TABLE
5338
OW
3BCH
5339
OW
318H
5340
OW
218H
534\ F.E
LABEL WORD
5342
PC-XT System BIOS (11/08/82) 5-169
LOC OBJECT
F9A9 F9A9 ,!IBEE F9AB E81COO F9AE 1E F9AF E8Al00 F9B2 AO 1000 F9B5 2 ....0 1 F9Bl 150F F9B9 F9B9 FA F9BA B089 F9BC E663 F9BE B085 F9CO E66 I F9C2 AO 1500 F9C5 E660 F9C1 F4 F9C8 F9C8 IF F9C9 C3
F9CA F9CA F9CA 2E8A04 F9CD ....6 F9CE 50 F9CF E8CAFF F9D2 58 F9D3 3COA F9D5 75F3 F9D7 C3
F9D8 F9D8 9C F9D9 FA F9DA 1E F9DB E87BOO F9DE OAF6 F9EO 7414 F9E2 F9E2 B306 F9E4 E82100 F9E7 F9E7 E2FE F9E9 FECE F9EB 15F5 F9EO 803E 12000 I F9F2 1502 F9F4 EBC3 F9F6 F9F6 B30 I F9F8 E80000 F9FB F9FB E2FE F9FD FECA F9FF 75F5 FAOI FAOI E2FE FA03 FA03 E2FE FA05 IF FA06 9D FAOT C3
FADe FAD8 80B6 FAOA E643 FAOC 883305 FAOF E642 FAI' 8AC4 FAI3 E642 FA15 E461 FA11 8AEO FA\9 OC03 FAtS E661 FAIO 2BC9 FAIF FAIF E2FE FA21 FECB FA23 15FA FA25 8AC.... FA21 E661 FA29 C3
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XT) I' /08/82
5343
5344
THIS SUBROUTINE WILL PRINT A MESSAGE ON THE DISPLAY
5345
5346 5341 5348 5349
5350 5351
; ENTRY REQU I REMENTS:
;
SI = OFFSET I ADDRESSl OF MESSAGE BUFFER
;
CX = MESSAGE 8YTE COUNT
-------- ------- ------- ----- ;
~ =~SG
MAXIMUM MESSAGE LENGTH IS 36 CHARACTERS PR~~-- - - ~~;R
5352
MDV
BP. S I
SET BP NON- ZERO TO FLAG ERR
5353
CALL
P MSG
PR I NT MESSAGE
5354 5355
PUSH CALL
OS DDS
5356 5357 5358 5359 5360
MOV
AND
JNZ
MFG HALT:
-
CLI
AL. BYTE PTR EQU I P FLAG
AL,O IH
-
GI2
LOOP/HALTON ERROR SWITCH ON7 NO - RETURN
YES - HALT SYSTEM
5361 5362 5363
MDV OUT MDV
AL.89H CMO PORT, AL AL,TOOOOIOIB
01 SABLE KB
5364
OUT
PORT B,AL
5365 5366 5367
MDV
OUT HLT
AL. MFG ERR FLAG PORT_A~AL -
RECOVER ERROR I NO I CATOR
SET INTO 8255 REG HALT SYS
5368 5369 5310 5371 5372
G12: E_MSG
POP
RET ENOP
5313 P MSG 5374 GI2A:
PROC
NEAR
5375 5316 5377 5318 5319
MOV INC PUSH CALL POP
AL.CS:[SI] 51
, , - AX
PRT HEX
I PUT CHAR IN AL PO I NT TO NEXT CHAR SAVE PRINT CHAR CALL VIDEO 10 RECOVER PRTNT CHAR
5360 5361 5382
eMP JNE RET
AL,10 G 12A
WAS IT LINE FEED1 ; ND,KEEP PRINTING STRING
5383 P_MSG ENDP
5384
5365
5366
INITIAL RELIA81LITY TEST -- SUBROUTINES
5387
53B8 5389 ;
ASSUME CS:COOE,DS:DATA
5390 ; 5391
SUBROUT I NES FOR POWER ON 0 I AGNOST I CS
5392
THIS PROCEDURE WILL ISSUE ONE LONG TONE 13 SECS) AND ONE OR
5393
MORE SHORT TONES 11 SEC) TO INDICATE A FAILURE ON THE PLANAR
5394
BOARD, A BAD RAM MODULE, OR A PROBLEM WITH THE CRT.
5395 5396
= ENTRY PARAMETERS:
DH NUMBER OF LONG TONES TO BEEP
- -- --------------- 5397
DL = NUMBER OF SHORT TONES TO SEEP.
5396 ~RR-~~~~ -~RO~ ~~~~
5399
5400
-
PUSHF
SAVE FLAGS
5401 5402
CL I
PUSH
05
DISABLE SYSTEM INTERRUPTS
SAVE OS REG CONTENTS
5403 5404 5405 5406 5407 5408 5409
Gl : G2:
CALL DR JZ
MOV CALL
DDS
DH,DH 03
BL,6 BEEP
ANY LONG ONES TO BEEP
NO, 00 THE SHORT ONES
LONG BEEP:
COUNTER FOR 8EEPS
DO THE BEEP
5410 5411 5412 5413 5414 5415
5416 G3: 5411 5418 5419 G4:
LOOP DEC JNZ CMP JNE JMP
MDV CALL
02 DH GI MFG TST, 1 03 MFG_HAL T
BL,I BEEP
DEL AY BETWEEN BEEPS ANY MORE TO DO DO IT MFG TEST MODE1 YES - CONT I NUE BEEP I NG SPEAKER STOP BLINKING LED SHORT BEEP: COUNTER FOR A SHORT BEEP
00 THE SOUND
5420
LOOP
G4
DELAY BETWEEN BEEPS
5421
DEC
DL
5422
5423 os,
JNZ
03
DONE WITH SHORTS DO SOME MORE
5424 5425 G6: 5426
5421 5428 5429
LOOP
05
LOOP
06
PDP
05
POPF
RET
LONG DEL A'f BEFORE RETURN
RESTORE OR I G CONTENTS OF OS RESTORE FLAGS TO ORIG SETTINGS RETURN TO CALLER
5430 5431
ERR- BEEP
ENDP
5432 ;----- ROUTINE TO SOUND BEEPER
5433
5434 BEEP
PROC
NEAR
5435 5436 5437 5438 5439 5440 5441 5442
MDV OUT MDV
OUT MDV OUT
IN MDV
AL. 101 1011 OB T I MER"'3, AL AX,533H T [MER+2.AL
AL,AH
T I MER"'2. AL AL,PORT B AH,AL -
SEL TIM 2,LSB,MSB,81NARY
WR I TE THE T I MER MODE REG
DIVISOR FOR 1000 HZ
WRITE TIMER 2 CNT - LSB
WRITE TIMER 2 CNT - MSB
GET CURRENT SETT I NG OF PORT
SAVE THAT SETTINGH
5443
DR
AL.03
TURN SPEAKER ON
5444 5445 5446 5441 5448 5449 5450 5451 5452
5453
G7:
BEEP
OUT SUB
LOOP DEC JNZ MOV OUT RET ENDP
PORT 8,AL
CX,CX
G1 BL 01 AL,AH PORT_B,AL
SET CNT TO WA 1T 500 MS
DELA Y BEFORE TURN I NG OFF
DELAY CNT EXPIRED7
NO - CDNT I NUE 8EEP I NG SPK
RECOVER VALUE OF PORT
; RETURN TO CALLER
5-170 PC-XT System BIOS (11/08/82)
LOC OBJECT
FA2A
FA2A B008 FAze E661 FA2E 895629 FA31 FA31 E2FE FA33 80C8 FA35 Eb61 FA37 FA37 8048 FA39 E6bl FA38 80FO FA30 Eb21 FA3F C606680400 FA44 F8 FA45 28C9 FA47 FA47 F606680402 FA4C 7502 FA4E E2F7 FA50 FA50 E460 FA52 8A08 FA54 80C8 FA56 E661 FA58 C3
FA59 FA59 50 FA5A B84000 FA50 8E08 FA5F 58 F A60 C3
FA6E FA6E FA6E 0000000000000000 FA76 7E81A581B099817E FA7E 7EFFD8FFC3E7FF7E FA86 6CFEFEFE1C381000 FA8E 10387CFE1C381 000 FA96 387C38FEFE7C387C FA9E 101038 7CFE7C387C FAA6 0000 183C3C 180000 FAAE FFFFE7C3C3E7FFFF FA8b 003C6642426b3COO F A8E FFC39980BD99C3FF FACb OF070F7DCCCCCCl8 FACE 3Cbbb6663CI87E18 FAD6 3F333F303070FOEO FADE 7Fb37Fb36367E6CO FAE6 995A3CE7E73C5A99 FAEE 80EOF8FEF8E08000 FAF6 020E3EFE3EOE0200 FAFE 183C7E18187E3C18 FB06 6666666b66006600 FBOE 7F08DB7BIBIBIBOO F8 16 3E63386C6C38CC 7 8 FBIE 000000007E7E7EOO FB26 183C7EI87E3CI8FF FB2E 183C7EI818181800 FB36 181818187E3CI800 F83E 00 I 80CFEOC I 80000 FB46 003060FE60300000 FB4E OOOOCOCOCOFEOOOO FB56 0024bbFF66240000 FB5E 00183C7EFFFFOOOO F866 00FFFF7E3C 180000 FB6E 0000000000000000 FBl6 3078783030003000 Fe7E 6C6C6COOOOOOOOOO FB86 6C6CFE6CFE6C6COO FB8E 307CC0780CF83000 FB96 00C6CC I 83066C600 FB9E 386C38760CCC7600 FBA6 6060COOOOOOOOOOO FBAE 1830606060301800 FBBb 60301818 \ 8306000 FBBE 00663CFF3C660000 FBC6 003030FC30300000 FBCE 0000000000303060 FB06 OOOOOOFCOOOOOOOO FBOE 0000000000303000 FBE6 060C 183060C08000 FBEE lCC6CEOEF6E61COO FBF6 301030303030FCOO FBFE 78CCOC3860CCFCOO FC06 78CCOC380CCC1800 FCOE lC3C6CCCFEOC I EOO FCI6 FCCOF80COCCC7800 FC1E 3860COF8CCCC1800 FC26 FCCCOC 1830303000 FC2E 18CCCC78CCCC7800 FC36 78CCCC7COC 187000 FC3E 0030300000303000 FC46 0030300000303060 FC4E 183060C06030 1800 FC56 OOOOFCOOOOFCOOOO FC5E 6030 180C 18306000 FC66 78CCOC1830003000
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
5454 5455 5456 5457 5458 5459 5460 5461 5462 5463 5464 5465 54bb 5461 5468 5469 5410 5411 5412 5473 5474 5475 5476 5411 5478 5479 5480 5481 5482 5483 5484 5485 5486 5481 5488 5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499 5500 5501 5502 5503 5504 5505 550b 5507 5508 5509 5510 551 1 5512 55 I 3 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 553b 5531 5538 5539 5540 5541 5542 5543 5544 5545 554b 5541 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 55bO 5561 5562 55£.3 55b4
; --- - - - - -------- - - - --------- -- - - - - -------- ------ - - - ------------ - - -
;
TH I S PROCEDURE WILL SEND A SOFTWARE RESET TO THE KEYBOARD.
------ ---- ------ ---------- ;
SCAN CODE 'AA' SHOULD BE RETURNED TO THE CPU.
- - - -- -- -
------- ------ -- ---- ------
---
-- ---
KBO RESET
PROC
NEAR
-
ASSUME OS:ABSO
MOV
AL, 08H
; SET KBD CLK LINE LOW
OUT
PORT B, AL
MOV
CX,I0582
G8:
; WR I TE 8255 PORT B HOLD KBD CLK LOW FOR 20 MS
LOOP MOV
OUT
SP TEST:
-
MOV
OUT
G8 AL.OC8H PORT_B.AL
AL .48H PORT B,AL
LOOP FOR 20 MS SET CLK, ENABLE LINES HIGH
ENTRY FOR MANUFACTURING TEST 2 SET KBD CLK HI GH, ENABLE LOW
MOV
AL.OFOH
ENABLE KEYBOARD INTERRUPTS
OUT
INTAOI,AL
, WRITE 8259 IMR
MOV 5TI
OATA_AREA [OFFSET I NTR JL~G ~NASLE; I~~~~~U~~~ERRUPT I NO I CATOR
5uB
CX, ex
G9:
; SETUP INTERRUPT TIMEOUT CNT
TEST JNZ
DATA AREAIOFFSET INT R FLAG}, 02H ; DID A KEYBOARD INTR OCCUR?
G 10 -
- ; YES - READ SCAN CODE RETURNED
LOOP
G9
GIO:
; NO - LOOP TILL TIMEOUT
IN MOV
AL,PORT A BL,AL
; READ KEYBOARD SCAN CODE SAVE SCAN CODE JUST READ
MOV OUT
AL,OC8H PORT_B, AL
CLEAR KEYBOARD
RET KBD_RESET
ENOP
RETURN TO CALLER
005
005
; --
PROC PUSH MOV MOV
POP RET ENDP
NEAR AX AX .DATA OS,AX AX
SAVE AX
SET SEGMENT RESTORE AX
CHARACTER GENERATOR GRAPHICS FOR 320X200 AND 640X200 GRAPHICS
ORG
CRT CHAR GEN
-
DB
DB DB DB 08 08 08 DB DB DB DB 08 OB DB OB OB OB OB
OB OB OB OB
OB 08 08
DB 08 08
08 08
08
08 08 08
08 08 OB 08 08 OB DB DB DB 08 OB
DB DB
DB
DB DB DB 08 DB 08 08 DB DB
DB DB DB DB DB DB DB
OFA6EH LABEL BYTE
OOOH, OOOH, OOOH, OOOH, OOOH, OOOH. OOOH, OOOH 07EH, 08 IH, OA5H,081H, OBOH, 099H, 081H, 07EH
o7EH. OFFH, OOBH, OFFH. OC3H. OE 7H. OFFH. 01EH
ObCH. OFEH, OFEH, OFEH, 0 7CH. 038H, 0 I OH, OOOH 01 OH, 038H, 07CH, OFEH, 0 7CH, 038H, 0 I OH, OOOH 038H, 0 lCH, 038H, OFEH. OFEH, 0 7CH. 038H, 07CH
01 OH. 0 I OH, 038H, 01CH. OFEH, 01CH, 038H, 07CH OOOH, OOOH, 0 I 8H, 03CH, 03CH, 0 18H, OOOH, OOOH OFFH, OFFH. OE1H, OC3H, OC3H, OE1H. OFFH, OFFH OOOH, 03CH, ObbH, 042H, 042H, 066H, 03CH, OOOH OFFH, OC3H, 099H, OBOH, OBOH, 099H, OC3H, OFFH OOFH, 00 7H, OOFH, 010H, OCCH, OCCH, OCCH, 018H 03CH, 066H, 066H, ObbH, 03CH. 0 I 8H, 0 lEH, 0 18H
03FH, 033H, 03FH, 030H, 030H, 0 70H. OFOH, OEOH 07FH, 063H. 0 lFH. 063H, 063H, 06 7H, OE6H, OCOH 099H, 05AH, 03CH, OE1H. OE7H, 03CH, 05AH, 099H
080H, OEOH, OF8H, OFEH, OF8H, OEOH, 080H. OOOH 002H, OOEH, 03EH. OFEH, 03EH, OOEH, 002H. OOOH o 18H, 03CH, 07EH, 0 18H,O 18H,OlEH,03CH, 0 18H
066H. 066H, 066H, 06bH. 066H, OOOH, 066H. OOOH
olFH, ODBH, OOSH. 01BH, 0 I BH, 0 ISH, 0 ISH, OOOH
03EH, Ob3H, 038H, 06CH, 06CH, 038H. OCCH, Ol8H
OOOH, OOOH, OOOH, OOOH, 0 7EH, 07EH, 0 7EH, OOOH
o18H, 03CH,07EH, 0 18H,OlEH, 03CH, 0 18H, OFFH o ISH, 03CH, 07EH,O 18H.0 18H,O 18H, 0 18H, OOOH
018H,O 18H, 0 18H,O 18H,OlEH,03CH, 0 18H, OOOH OOOH,O 18H, OOCH, OFEH. OOCH, 0 I 8H, OOOH, OOOH OOOH, 030H, ObOH, OFEH, ObOH, 030H, OOOH, OOOH OOOH, OOOH. OCOH, OCOH. OCOH, OFEH, 00 OH. 00 OH OOOH, 024H. 066H. OFFH, 066H, 024H, 00 OH, OOOH OOOH.O 18H. 03CH, 0 7EH, OFFH, OFFH, OOOH, 0 0 OH
OOOH, OFFH. OFFH, OlEH, 03CH. 0 18H. OOOH, OOOH
OOOH, OOOH. OOOH. OOOH. OOOH, OOOH, OOOH, OOOH 030H. 018H, 0 78H, 030H, 030H, OOOH, 030H, OOOH 06CH. OoCH, 06CH, OOOH, OOOH, OOOH. OOOH. OOOH ObCH. OoCH, OFEH, ObCH, OFEH, 06CH, ObCH. OOOH 030H, 07CH. OCOH, 078H, OOCH, OF8H, 030H, OOOH 00 OH, OCbH, OCCH, 0 18H, 030H, ObbH, OC6H, OOOH
038H, 06CH, 038H. 016H, OOCH, OCCH, 01bH, OOOH 060H, 060H. OCOH, OOOH, OOOH, OOOH, OOOH, OOOH 01 8H, 030H, 060H, 060H, 060H, 030H, 0 18H, OOOH 060H, 030H, 0 I 8H, 0 18H, 0 18H, 030H, 060H, OOOH OOOH, 066H, 03CH, OFFH, 03CH, 066H, OOOH, OOOH OOOH, 030H. 030H. OFCH, 030H, 030H, OOOH, OOOH OOOH, OOOH, OOOH, OOOH, OOOH, 030H, 030H. 060H
OOOH. OOOH, OOOH, OFCH, OOOH. OOOH, OOOH, OOOH OOOH, OOOH, OOOH, OOOH, OOOH, 030H, 030H, OOOH 006H, OOCH, 0 18H, 030H, OoOH, OCOH, 080H. OOOH
07CH, OC6H. OCEH. OOEH, OF6H, OE6H. 07CH. OOOH 030H, 0 70H, 030H, 030H, 030H. 030H, OFCH, OOOH
Ol8H. OCCH, OOCH, 038H, ObOH, OCCH, OFCH, OOOH Ol8H. OCCH. OOCH. 038H. OOCH. OCCH. OT8H, OOOH 01 CH, 03CH, 06CH, OCCH, OFEH, OOCH, 0 IEH, OOOH OFCH, OCOH, OF8H. OOCH, OOCH, OCCH, OT8H, OOOH 038H, ObOH. OCOH, OF8H. OCCH, OCCH, OT8H, OOOH OFCH, OCCH, OOCH, 0 18H, 030H, 030H. 030H, OOOH 078H, OCCH, OCCH, 018H, OCCH. OCCH, 078H. OOOH 07 8H ,OCCH, OCCH, 07CH, OOCH, 0 ISH, 0 7 OH, OOOH OOOH, 030H, 030H, OOOH, OOOH, 030H, 030H, OOOH OOOH, 030H, 030H, OOOH, OOOH, 030H, a30H, ObOH
o 18H ,030H, ObOH, ocaH, 060H, 030H, 0 18H, OOOH
OOOH, OOOH, OFCH, 00 OH, OOOH, OFCH, OOOH, OOOH ObOH, 030H. 0 18H, OOCH, 0 18H, 030H, 060H, OOOH 07 8H, OCCH, OOCH, a 18H, 030H. OOOH, 030H, OOOH
o 00
0-01 0-02
0-03 0-04 0-05 O-Ob
0-01 D-08 0-09 O-OA O-OB O-OC
0-00 O-OE O-OF
0-10
0-'1 0-'2
0-'3 0-'4 0-15
r-'6
0-'7 0-18 0-,9
D-'A O-'B O-'C 0-'0 O-'E O-IF
SP 0 20 ! 0 21 " 0-22 , 0-23 S 0-24 PER-CENT 0_25
& 0 26 · 0-27 I 0-28 ) 0-29
· 0-2A + 0-2B
, O::::2C - 0 20 · 0-2E I 0-2F
o 0-30
1 0-31 2 0-32 3 0-33 4 0-34
5 0-35 6 0-36 7 0-31 8 0-38 9 0-39 : 0-3A
; O::)B < 0 3C '" 0-30
0-3E
O::::3F
PC-XT System BIOS (11/08/82) 5-171
LOC OBJECT
FC6E 7CC60EOEOEC07600 FC76 3078cCCCFCCCCCOO FC7E FC66667C6666FCOO FC66 3C66COCOC0663COO FC6E F66C6666666CF600 FC96 FE6266166662FEOO FC9E FE6266166660FOOO FCA6 3C66COCOCE663EOO FCAE CCCCCCFCCCCCCCOO FCB6 1630303030301600 FCBE I EOCOCOCCCCC 7 800 FCC6 E6666C166C66E600 FCCE F06060606266FEOO FC06 C6EEFEFE06C6C600 FCOE C6E6F60ECEC6C600 FCE6 386CC6C6C66C3800 FCEE FC66661C6060FOOO FCF6 18CCCCCCOC 181 COO FCFE FC66661C6C66E600 F006 78CCE070lCCC1800 FOOE FCB4303030301800 FD 16 CCCCCCCCCCCCFCOO FDI E CCCCCCCCCC183000 F026 C6C6C6D6FEEEC600 F02E C6C66C38386CC600 F036 CCCCCC1830301800 F03E FEC68C 183266FEO 0 F046 1860606060601800 F04E C06030 180C060200 F0561616181818161600 F05E 10366CC600000000 F066 OOOOOOOOOOOOOOFF F06E 3030180000000000 F016 0000160C1CCC1600 F01E E060601C66660COO F086 000016CCCOCC1800 F08E I COCOC lCCCCC160 0 FD96 000018CCFCC01800 F09E 386C60F06060FOOO FOA6 000076CCCC1COCF6 FDAE E0606C 166666E600 FOB6 3000703030301800 FOBE OCOOOCOCOCCCCC78 FDC6 E060666C 186CE600 FOCE 1030303030301800 F006 0000CCFEFE06C600 FOOE 0000F8CCCCCCCCOO FOE6 000018CCCCCC1800 FDEE 00000C66661C60FO FDF6 000016CCCC1COCIE FDFE 0000DC166660FOOO FE06 0000lCC0160CF800 FEOE 10301C30303-41600 FEI6 0000CCCCCCCC1600 FE 1E OOOOCCCCCC 183000 FE26 0000C606FEFE6COO FE2E 0000C66C366CC600 FE36 0000CCCCCC1COCF8 FE3E 0000FC983064FCOO FE46 I C3030E03030 1COO FE4E 1818180018181800 FE56 E03030 I C3030EOOO FE5E 160COOOOoooooooo FE66 001 0366CC6C6FEOO
FE6E FE6E FE6E FB FE6F IE FE10 E8E6FB FE13 OAE-4 FE15 1-401 FEn FECC FE19 1-416 FE1B FE1B FB FETC IF FE10 CF FE7E FE7E FA FE1F A07000 FE82 C606100000 FE81 8BOE6EOO FE8B 8B 166COO FE6F ESEA FE91 FE91 FA FE92 69166COO FE96 690E6EOO FE9A C606100000 FE9F EBOA
LINE SOURCE IBIOS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
5565 5566 5561 5568 5569 5510 557 I 5512
5513 551-4 5515 5516 5511 5518 5519 5560 5561 5562 5563 5584 5565 5586 5581 5568 5569 5590 5591 5592 5593 559-4 5595 5596 5591 5598 5599 5600 560 I 5602 5603 560-4 5605 5606
5601 5606 5609 5610 5611 5612 5613 5614 5615 5616 5611 5616 5619 5620 5621 5622 5623 562-4 5625 5626 5621 5628 5629 5630 5631 5632 5633 563-4 5635 5636 5637 5638 5639 5640 56-41 56-42 56-43 56-44 5645 5646 5641 5646 5649 5650 5651 5652 5653 5654 5655 5656 5651 5656 5659
5660 5661 5662 5663 5664 5665 5666 5667 56&6 5&69 5&10 5611 5612 5673 5674 5675
DB
01CH, OC6H, OOEH, OOEH, ODEH. OCOH, 016H. OOOH · 0 40
DB
030H, 0 18H, OCCH, OCCH, OFCH. OCCH, OCCH. OOOH A 0-41
DB
OFCH, 066H, 066H, 01CH, 066H, 066H, OFCH, OOOH B 0-42
DB
03CH, 066H. OCOH, OCOH. OCOH. 066H, 03CH, OOOH C 0-43
DB
o OF8H, O&CH. 066H. 066H, 066H. 06CH, OF8H, OOOH
0-44
DB
OFEH. 062H, 068H, 0 18H, 066H, 062H, OFEH, OOOH E 0-45
DB
OFEH. 062H, 068H, 0 18H, 066H. 060H, OFOH, OOOH F 0-46
DB
03CH. 066H, OCOH, OCOH, OCEH, 066H. 03EH, OOOH G 0-41
DB
OCCH. OCCH, OCCH, OFCH, OCCH, OCCH, OCCH, OOOH H 0-48
DB
o18H, 030H, 030H. 030H, 030H, 030H, 0 18H, OOOH
I 0-49
DB
01 EH, OOCH, OOCH, OOCH, OCCH, OCCH, 0 7 8H. OOOH ,J 0-4A
DB
OE6H, 066H, 06CH. 0 18H, 06CH. 066H, OE6H, OOOH K 0-4B
DB
OFOH, 060H, 060H, 060H, 062H, 066H, OFEH, OOOH L 0-4C
DB
OC6H, OEEH, OFEH, OFEH, 006H, OC6H, OC6H. OOOH M 0-40
DB
OC6H, OE6H, OF6H, OoEH, OCEH, OC&H, OC6H, OOOH N 0-4E
DB
o 038H, 06CH. OC6H, OC6H, OC6H, 06CH, 038H. OOOH
0-4F
DB
OFCH. 066H, 066H, 0 lCH, 060H, 060H, OFOH, OOOH PO-50
DB
07 8H, OCCH. OCCH, O(;CH, OOCH. 07 8H, 0 1CH, OOOH Q 0-51
DB
OFCH, 066H, 066H, 0 lCH, 06CH, 066H, OE6H, OOOH R 0-52
DB
018H, OCCH, OEOH, 0 1 OH. 0 1CH, OCCH, 0 18H, OOOH SO-53
DB
OFCH. OB4H, 030H, 030H. 030H. 030H, 018H. eeeH TO-54
DB
OCCH. OCCH, OCCH, OCCH, OCCH. OCCH, OFCH, eOOH U 0-55
DB
OCCH. OCCH, OCCH, OCCH, OCCH. 018H. 030H, OOOH v 0-56
DB
OC6H, OC6H, OC6H, OD6H, OFEH, OEEH, OC6H, OOOH 'II 0-51
DB
OC6H. OC6H, 06CH, 038H. 038H, 06CH. OC6H, OOOH X 0-58
DB
OCCH. OCCH, OCCH, 0 18H. 030H. 030H. 018H, OOOH YO-59
DB
OFEH, OC6H, 08CH, 0 I 8H, 032H. 066H, OFEH, OOOH Z 0-5A
DB
016H, 060H, 060H. 060H. 060H. 060H. 0 18H, OOOH [ 0-5B
DB
OCOH. 060H. 030H, 0 16H. OOCH, 006H. 002H, OOOH BACKS LASH 0 5C
DB
078H,O 16H,O 18H, 0 16H.0 18H, 0 16H,016H, OOOH ] 0 50
DB DB
01 OH, 038H, 06CH, OC6H, OOOH, OOOH, OOOH. OOOH OOOH, OOOH, OOOH, OOOH. OOOH, OOOH, OOOH. OFFH
o CIRCUMFLEX 0 5E
5F
DB
030H, 030H, 0 I 8H, COOH. OOOH, OOOH, OOOH, OOOH ... 0-60
DB
OOOH, OOOH, 0 18H, OOCH, 01CH. OCCH. 016H, OOOH LOWER CASE A 0 61
DB
OEOH. 060H, 060H, 0 lCH, 066H, 066H. OOCH. OOOH L.C. B 0 62
DB
OOOH, OOOH, 0 16H, OCCH, OCOH, OCCH. 0 18H, OOOH L.C. C 0-63
DB
01 CH, OOCH, 0 OCH, 0 lCH, OCCH, OCCH. 0 16H, OOOH L.C. 0 0-64
DB
OOOH. OOOH, 018H, OCCH, OFCH, OCOH, 0 18H. OOOH L.C. E 0-65
DB
038H, 06CH, 060H, OFOH, 060H, 060H, OFOH. OOOH L.C. F 0-66
DB
OOOH, OOOH, 0 16H, OCCH, OCCH. 01CH, OOCH. OF8H L.C. G 0-61
DB
OEOH. 060H, 06CH, 016H, 066H, 066H, OE6H, OOOH L.C. H 0-66
DB
030H. OOOH, 0 7 OH, 030H, 030H. 030H, 01 6H. OOOH L.C. ! 0-69
DB
OOCH, OOOH, 0 OCH, OOCH, OOCH, OCCH, OCCH. 018H L.C. J D-6A
DB
OEOH, 060H, 066H, 06CH, 0 18H. 06CH, OE6H, OOOH L.C. K 0-6B
DB
01 OH, 030H, 030H, 030H, 030H. 030H, 018H, OOOH L.C. L 0-6C
DB
OOOH. OOOH, OCCH, OFEH, OFEH, OD6H, OC6H, OOOH L.C. M 0-60
DB
OOOH, OOOH. OF8H, OCCH, OCCH, OCCH, OCCH, OOOH L.C. N 0-6E
DB
OOOH, OOOH, 0 16H, OCCH, OCCH, OCCH, 0 7 8H, OOOH L.C. a 0-6F
DB
OOOH, OOOH, OOCH, 066H, 066H, 01CH. 060H, OFOH L.C. P 0-10
DB
OOOH, OOOH, 0 16H, OCCH. OCCH, 01CH, OOCH, 0 1EH L.C. Q 0-11
DB
OOOH. OOOH. OOCH, 0 16H. 066H, 060H, OFOH, OOOH L.C. R 0-12
DB
OOOH, OOOH, 01CH, OCOH, 018H, OOCH. OF 8H, OOOH L.C. S 0-13
DB
01 OH, 030H. 01CH, 030H. 030H, 034H. 0 18H, OOOH L.C. T 0-14
DB
OOOH, OOOH, OCCH, OCCH, OCCH, OCCH, 016H. OOOH L.C. U 0-15
DB
OOOH, OOOH. OCCH, OCCH, OCCH. 0 7 8H. 030H, OOOH L.C. v 0-16
DB
OOOH, OOOH. OC6H, 006H, OFEH, OFEH, 06CH, OOOH L.C. 'II 0-17
DB
eOOH, OOOH, OC6H. 06CH, 036H. 06CH. OC6H, OOOH L.C. X 0-18
DB
OOOH, eOOH. OCCH, OCCH. OCCH, 01CH. OOCH, OF6H L.C. Y 0-19
DB
OOOH, OOOH, OFCH, 098H. 030H. 064H, OFCH, OOOH L.C. Z D-1A
DB
01 CH, 030H, 030H, OEOH. 030H, 030H. 0 I CH. OOOH { 0 lB
DB
oISH, 0 18H,O 18H,OOOH, 0 I BH, 0 ISH,O 18H, OOOH I 0-lC
DB
OEOH, 030H, 0 30H, 0 1CH. 030H, 030H, OEOH, OOOH } 0-10
DB
016H, OOCH, OOOH, OOOH. OOOH, OOOH, OOOH, OOOH TILDE 0 7E
DB
OOOH, 0 1 OH, 038H, 06CH, OC6H, OC6H. OFEH, OOOH DELTA 0:=7F
INT I A ---------------- ------------ TIME OF DAY
THIS ROUTINE ALLOWS THE CLOCK TO BE SETIREAO
INPUT
(AHI
READ THE CURRENT CLOCK SETT I NG
= RETURNS ex HIGH PORTION OF COUNT
ox = LOW PORTION OF COUNT
AL = 0 IF TIMER HAS NOT PASSED
24 HOURS SINCE LAST READ
I AH) = I
<>0 IF ON ANOTHER DAY SET THE CURRENT CLOCK
CX = HIGH PORTION OF COUNT
ox = LOW PORT I ON OF COUNT
NOTE: COUNTS OCCUR AT THE RATE OF
1193160/65536 COUNTS/SEC
lOR ABOUT 18.2 PER SECOND -- SEE EQUATES BELOW)
ASSUME
DRG TIME OF DAY
- -STI
PUSH
CALL DR JZ DEC JZ Tl :
ST 1
PDP IRET T2: eLi Mav MDV Mav MaV JMP T3: CLI MDV MDV MDV JMP TIME_OF_OAY
CS:COOE.DS:OATA
OFE6EH
PROC
FAR
05 DDS AH,AH T2 AH T3
05
AL.TIMER OFL
TIMER OFL,O
CX.TIMER HIGH
OX, T I MER-LOW
TI
TIMER LOW,OX TIMER-HIGH,CX TIMER-OFL,O TI
ENOP
I NTERRUPTS BACK ON SA VE SEGMENT
AH=O READ T I ME AH=l
SET TI ME TOO-RETURN INTERRUPTS BACK ON RECOIIER SEGMENT RETURN TO CALLER READ TIME NO TTMER INTERRUPTS
WHILE
READING
GET OVERFLOW, AND RESET THE FLAG
TOO RETURN SET-TIME NO TNTERRUPTS WHILE WRITING
SET THE TIME RESET OVERFLOW TOO_RETURN
5-172 PC-XT System BIOS (11/08/82)
LOC 08..JECT
FEA5 FEA5 FEA5 F8 FEA6 1E FEA 7 50 FEA8 52 FEA9 E8ADFB FEAC FF066COO FEBO 1504 FEB2 FF066EOO FEB6 FEB6 833E6EOO 18 FEBB 1'j15 FEBD 813E6COOBOOO FEC3 1500
FEC5 28CO FECl A36EOO FECA A36COO FECD C606700001
FED2 FED2 FEOE4000 FED6 150B FED8 e0263FOOFO FEDD BOOC FEDF BAF203 FEE2 EE FEE3 FEE3 CD 1e FEE5 B020 FEEl E620 FEE9 5A FEEA 58 FEEB 1F FEEC eF
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XTI II f08/82
5616 5611
; - - --- - - ---- ------ - ----- - - - -- - -- --------- - ---- - ------
5618 ; TH I S ROUT I NE HANDLES THE T I MER I NTERRUPT FROM
5619
CHANNEL 0 OF THE 8253 TIMER. INPUT FREQUENCY
5680
IS 1.19318 MHZ AND THE DIVISOR IS 65536, RESULTING
5681
IN APPROX. 18.2 INTERRUPTS EVERY SECOND.
5682
5683
THE INTERRUPT HANDLER MAINTAINS A COUNT OF INTERRUPTS
5684
SINCE POWER ON TIME, WHICH MAY BE USED TO ESTABLISH
5&85
TIME OF DAY,
5&8&
THE I NTERRUPT HANDLER ALSO DECREMENTS THE MOTOR
5&81
CONTROL COUNT OF THE DISKETTE, AND WHEN IT EXPIRES,
5&88
WILL TURN OFF THE 0 I SKETTE MOTOR, AND RESET THE
5&89
MOTOR RUNNING FLAGS.
5690
THE INTERRUPT HANDLER WILL ALSO INVOKE A USER ROUTINE
5&91
THROUGH INTERRUPT lCH AT EVERY TIME TICK. THE USER
5692
MUST CODE A ROUTINE AND PLACE THE CORRECT ADDRESS IN
5693
THE VECTOR TABLE.
5694
5695
ORG
OFEA5H
5&96 TIMER INT
5691
- STI
PROC
FAR
[NTERRUPTS BACK ON
5698
PUSH
OS
5699
PUSH
AX
5100
PUSH
OX
SAVE MACHINE STATE
5101
CALL
ODS
5102 5703
INC JNZ
T I MER LOW T4
INCREMENT T I ME TEST DAY
5704
INC
TIMER_HIGH
INCREMENT HIGH WORD OF TIME
5705 T4:
TEST DAY
5706
CMP
TIMER HIGH,Ol8H
TES T-FOR COUNT EQUAL I NG 24 HOURS
5707
JNZ
T5 -
01 SKETTE_CTL
5108 5709
CMP JNZ
T I MER LOW, OBOH T5 -
01 SKETTE_CTL
5110 5111
; ------ T I MER HAS GONE 24 HOURS
5112 5113
sus
AX, AX
5714
MOV
TIMER HIGH,AX
5715
MOV
TIMER-LOW. AX
5716
MOV
T I MER:'=OFL. I
5717
5718
----- TEST FOR DISKETTE TIME OUT
5719
5720 T5:
DISKETTE_CTL
5121 5122
DEC JNZ
MTOOTOR- COUNT
RETURN I F COUNT NOT OUT
5723
AND
MOTOR STATUS,OFOH
TURN OFF MOTOR RUNNING BITS
5124
MOV
AL,OCH
5725
MOV
OX,03F2H
FDC eTL PORT
5726
OUT
OX ,AL
TURN OFF THE MOTOR
5127 T6:
TIMER RET:
5728
INT
TRANSFER CONTROL TO A USER ROUTINE
5729
MOV
AL,EOI
5730
OUT
02QH,AL
END OF INTERRUPT TO 8259
5131
POP
OX
5132
POP
AX
5133
POP
OS
RESET MACHINE STATE
5134
IRET
RETURN FROM INTERRUPT
5135 TIMER INT
ENDP
5136
PC-XT System BIOS (11/08/82) 5-173
LOC OBJECT
FEF3 FEF3 FEF3 A5FE FEF5 87E9 FEF7 23FF FEF9 23FF FEFB 23FF FEFD 23FF FEFF 51EF FFO 1 23FF FF03 65FO FF05 4oF8 FFOl 41F8 FF09 59EC FFOB 39El FFOD 59F8 FFOF 2EE8 FFll 02EF
FF13 0000
FF15 F2E6 FF I 7 6EFE FF19 4BFF FFIB 4BFF FFIo A4FO FFIF C7EF FF21 0000
FF23
FF23 1E FF24 52 FF25 50 FF26 E830FB FF29 B008 FF2B E620 FF2D 90 FF2E E420 FF30 8AEO FF32 OAC4 FF34 7504 FF36 84FF FF38 E80A FF3A FF3A E42 I FF3C OAC4 FF3E E621 FF40 B020 FF42 E620 FF44 FF44 88266BOO FF48 58 FF49 5A FF4A IF FF4B FF4B CF
FF53 FF53 CF
LINE SOURCE (BIOS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
5131 ; --------- ---- --
5738 ; THESE ARE THE VECTORS WH I CH ARE MOVED INTO
5139 ; THE 8086 I NTERRUPT AREA OUR I NG POWER ON.
5140 ; ONLY THE OFFSETS ARE 01 SPLA YEO HERE, CODE
5741 ; SEGMENT WILL BE ADDED FOR ALL OF THEM, EXCEPT
5742 ; WHERE NOTED.
5743 ; - - - ------------ -
5144
ASSUME CS :CODE
5145
ORO
OFEF3H
5146 VECTOR TABLE
5741
- OW
LABEL WORD OFFSET TIMER INT
VECTOR TABLE FOR MOVE TO INTERRUPTS INTERRUPT 8
5748
DW
OFFSET KB I NT
INTERRUPT 9
5749
OW
OFFSET 011
1NTERRUPT A
5750
OW
OFFSET 011
1NTERRUPT B
5151 5752
OW
OFFSET 011
ow
OFFSET 01 I
1NTERRUPT C INTERRUPT 0
5753
OW
OFFSET 0 I SK I NT
INTERRUPT E
5754
OW
OFFSET 0 I I
INTERRUPT F
5755
OW
OFFSET V IDEO 10
1NTERRUPT 10H
5756
OW
OFFSET EQU 1PMENT
INTERRUPT 1 1H
5757
OW
OFFSET MEMORY SIZE OET
INTERRUPT 12H
5758 5759
OW
OFFSET DISKETTE I O~
OW
OFFSET RS232 I O~
INTERRUPT 13H INTERRUPT 14H
5760
OW
CASSETTE 10
INTERRUPT 15HIFORMER CASSETTE [0)
576\ 5762
OW
OFFSET KEYBOARD 10
OW
OFFSET PR I NTER~To
1NTERRUPT 16H INTERRUPT 17H
5763
5764
OW
OOOOOH
INTERRUPT 18H
5765
OW
OF&OOH
MUST BE INSERTED INTO TABLE LATER
5766
51&1
OW
OFFSET BOOT STRAP
1NTERRUPT 19"
51&8
OW
TIME OF DAY
INTERRUPT IAH -- TIME OF DAY
51&9
OW
DUMMY RETURN
INTERRUPT 18H -- KEY8oARo 8REAK AODR
5170
OW
DUMMY-RETURN
INTERRUPT IC -- TIMER BREAK AOOR
5171
OW
Vl0EO-PARMS
INTERRUPT 10 -- VIDEO PARAMETERS
5172 5713
OW OW
OoFFSET DISK - BASE
INTERRUPT IE -- DISK PARMS INTERRUPT IF -- POINTER TO VIDEO EXT
5114 5115
;-------------- ----------
5176 ; TEMPORARY INTERRUPT SERV I CE ROUT I NE
5177
I. THIS ROUTINE IS ALSO LEFT IN PLACE AFTER THE
5718 5119
POWER ON DIAGNOSTICS TO SERVICE UNUSED INTERRUPT VECTORS. LOCATION 'INTR FLAG' WILL
5180
CONTAIN EITHER: I. LEVEL OF HARDWARE INT. THAT
5181
CAUSED CODE TO BE EXEC.
5182
2. 'FF' FOR NON-HARDWARE INTERUPTS THAT WAS
b ----------- - 5183
5184
EXECUTED ACC [OENTL Y · ~~--- --;;~~--- -~~~~
5785
5186
ASSUME OS :DATA
5113"7
PUSH
OS
5788
PUSH
OX
5789
PUSH
AX
SAVE REG AX CONTENTS
5790
CALL
DOS
5791
MOV
AL.OBH
READ [N-SERVICE REG
5792
OUT
INTAOO.AL
IFIND OUT WHAT LEVEL BEING
5793
Nap
SERV! CEO I
5794 5795
IN Mav
AL.INTAOO AH.AL
GET LEVEL
SAVE IT
5796
OR
AL,AH
~O? INO HARDWARE I SR ACTIVE)
5797
JNZ
HW INT
5798
MOV
AH-;-OFFH
5799
JMP
SHORT SET_INTR_FLACi
SET FLAG TO FF IF NON-HOWARE
5800
5801
IN
AL.INTAOI
GET MASK VALUE
5802
OR
AL.AH
MA SK OFF L VL BE 1NG SERV I CEO
5803
OUT
INTAO I.AL
5804
MOV
AL,EOI
5805
OUT
INT .... OO.AL
5806 SET I NTR FLAG:
5807 5608
MOV POP
I NTR FLAG. AH AX -
SET FLAG
RESTORE REG AX CONTENTS
5809
POP
OX
5810
POP
05
5811 DUMMY RETURN:
NEED IRET FOR VECTOR TABLE
5812
- IRET
5813 011
ENoP
5814
5815
581&
5817
5818
ORO
OFF53H
5819
IRET
5820
5-174 PC-XT System BIOS (11/08/82)
LOC OB..JECT
FF54 FF54 FF54 FB FF55 IE FF56 50 FF57 53 FF58 51 FF59 52 FF5A B85000 FF5D 8ED8 FF5F 803EOOOOO I FF64 745F FF66 C60600000 I FF6B B40F FF6D CD I 0
FF6F 8ACC FF71 B519 FF73 E85500 FF7C 51 FF77 B403 FF79 COlO FF7B 59 FF7C 52 FF7D 3302
FF7F FF7F B402 FF81 COlO FF83 B408 FF85 COlO FF87 OACO FF89 7502 FF8B B020 FF8D FF8D 52 FF8E 3302 FF90 32E4 FF92 CDI7 FF94 5A FF95 F6C425 FF98 7521 FF9A FEC2 FF9C 3ACA FF9E 75DF FFAO 3202 FFA2 8AE2 FFA4 52 FFA5 E82300 FFA8 5A FFA9 FEC6 FFAB 3AEE FFAD 7500 FFAF FFAF 5A FFBO B402 FFB2 CD I 0 FFB4 C606000000 FFB9 EBOA FFBB FFBB 5A FFBC B402 FFBE COlO FFCO FFCO C6060000FF FFC5 FFC5 5A FFC6 59 FFC7 5B FFC8 58 FFC9 IF FFCA CF
FFCB FFCB 3302 FFCD 32E4
FFCF FFDI FFD3 FFD5 FFD7 FFD9
BOOA COl7 32E4 BOOD CDI7 C3
LINE SOURCE (BIDS FOR THE IBM PERSONAL COMPUTER XT) 11/08/82
5821 5822 5823 5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854 5855 5856 5857 5858 5859 5860 5861 5862 5863 5864 5865 5866 5867 5868 5869 5870 5871 5872 5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903
5904 5905 5906 5907 5908 5909 5910 591 I 5912 5913 5914 5915 5916 5917 5918 5919 5920 5921 5922 5923 5924 5925 5926 5927 5928 5929 5930 5931 5932 5933
I NT
5 - - - - - - - - - - - - - - - - - ~~~ ~
~ ~~~~~~
~~~~~~~~~~~ -~
~~~~~~~~~- ~~~-----
THIS LOGIC WILL BE INVOKED BY INTERRUPT 05H TO PRINT THE SCREEN. THE CURSOR POSITION AT THE TIME THIS ROUTINE IS INVOKED WILL BE SAVED AND RESTORED UPON COMPLET ION. THE ROUT I NE IS INTENDED TO RUN WITH INTERRUPTS ENABLED. IF A SUBSEQUENT 'PRINT SCREEN' KEY IS DEPRESSED DURING THE TIME THIS ROUTINE IS PRINTING IT WILL BE IGNORED. ADDRESS 50:0 CONTAINS THE STATUS OF THE PRINT SCREEN:
50:0
~ [ =255
EITHER PR I NT SCREEN HAS NOT BEEN CALLED OR UPON RETURN FROM A CALL THIS INDICATES A SUCCESSFUL OPERATION. PR I NT SCREEN I SIN PROGRESS ERROR ENCOUNTEREO OUR I NG PR I NT I NG
ASSUME CS: CODE, OS: XXDATA
aRC
OFF54H
PR I NT SCREEN - STI
PUSH
PROC
as
FAR
MUST RUN WITH INTERRUPTS ENABLED MUST USE 50: 0 FOR DATA AREA STORAGE
PUSH
AX
PUSH
BX
PUSH
CX
WILL USE THIS LATER FOR CURSOR LIMITS
PUSH MOV
OX AX,XXDATA
WILL HOLD CURRENT CURSOR POSITION HEX 50
MOV
DS,AX
CMP JZ MOV MOV
STATUS BYTE,I EXIT ~
STATUS BYTE,I AH,I5 -
SEE IF PRINT ALREADY IN PROGRESS ..JUMP IF PRINT ALREADY IN PROGRESS INDICATE PRINT NOW IN PROGRESS WILL REQUEST THE CURRENT SCREEN MODE
[NT
[OH
[AL]=MODE
[AH]=NUMBER COLUMNS/LINE
------ - - - - - - ---------- - - - - - - -- ;
~
~-------
[BH]=VISUAL PAGE
--------------~---
;
AT THIS POINT WE KNOW THE COLUMNS/LINE ARE IN
(AX] AND THE PAGE IF APPLICABLE IS IN[BH]. THE STACK
HAS DS,AX,BX,CX,DX PUSHED. [A] HAS VIDEO MODE
MOV
CL,AH
WILL MAKE USE OF (CX I REG I STER TO
MOV
CH,25
CONTROL ROW & COLUMNS
CALL
CRLF
CARR I AGE RETURN LINE FEED ROUT I NE
PUSH
CX
SAVE SCREEN BOUNDS
MOV
AH,3
WILL NOW READ THE CURSOR.
[NT
[ OH
AND PRESERVE THE POSITION
POP
CX
RECALL SCREEN BOUNDS
PUSH
OX
RECALL [BH]=VISUAL PAGE
----------------------------------- XOR
DX,DX
; --------~------------------
WILL SET CURSOR POSITION TO (0,0]
THE LOOP FROM PRIIO TO THE INSTRUCTION PRIOR TO PRI20
IS THE LOOP TO READ EACH CURSOR POSITION FROM THE
;
SCREEN AND PR I NT ·
- ~~ ~ ~ ~~--------- --~-
MOV [NT MOV [NT
OR JNZ MOV PR115: PUSH XOR
XOR [NT POP TEST JNZ [NC CMP JNZ XOR MOV PUSH CALL POP [NC
CMP JNZ PR 120: POP MOV [NT MOV
JMP ERR10:
POP MOV [NT ERR20 : MOV EXIT: POP POP
POP POP POP IRET PR I NT_SCREEN
AH,2 [ OH AH,8 [ OH AL,AL PRI15 AL.
OX DX,DX AH,AH I7H OX AH, 25H ERRIO OL CL,DL PRI1 0 DL,DL AH,DL OX CRLF OX OH CH,DH PRll0
OX AH,2 [OH STATUS BYTE,O SHORT EX I T
OX AH,2 IOH
STATUS BYTE,OFFH
OX CX BX AX
os
ENDP
TO INDICATE CURSOR SET REQUEST NEW CURSOR POSITION ESTABLISHED TO I NO I CATE READ CHARACTER CHARACTER NOW IN [AL I SEE IF VALID CHAR ..JUMP IF VALID CHAR MAKE A BLANK
SAVE CURSOR POSITION INDICATE PRINTER I TO INDICATE PRINT CHAR IN PR I NT THE CHARACTER RECALL CURSOR PDS I T I ON TEST FOR PR I NTER ERROR ..JUMP I F ERROR DETECTED ADVANCE TO NEXT COLUMN SEE IF AT END OF LINE I F NOT PROCEED BACK TO COLUMN 0 [AHI=O SAVE NEW CURSOR POSITION LINE FEED CARR I AGE RETURN RECALL CURSOR POSITION ADVANCE TO NEXT LINE FINISHED? I F NOT CONT I NUE
[ALI
RECALL CURSOR POSITION TO INDICATE CURSOR SET REQUEST CURSOR POS I T I ON RESTORED INDICATE FINISHED EXIT THE ROUTINE
GET CURSOR POSITION TO REQUEST CURSOR SET CURSOR POS I T I ON RESTORED
INDICATE ERROR
RESTORE ALL THE REG I STERS USED
CARR I AGE RETURN, LINE FEED SUBROUT I NE
CRLF CRLF
PROC XOR XOR
MOV [NT XOR MOV [NT RET ENDP
NEAR DX,DX AH,AH
AL,I2Q I7H AH,AH AL,I5Q I7H
PR INTER 0 WILL NOW SEND INITIAL LF,CR
TO PR INTER LF SEND THE LINE FEED NOW FOR THE CR CR SEND THE CARR I AGE RETURN
PC-XT System BIOS (11/08/82) 5-175
LOC OBJECT
FFOA FFOA 8AC6 FFOC E8ACF9 FFOF 8AC2 FFE 1 E8A 1F9 FFE4 B030 FFE6 E8B3F9 FFE9 B020 FFEB E8AEF9 FFEE C3
0000 EA5BEOOOFO 0005 313 I 2F30382F38
32
LINE SOURCE IBIOS FOR THE IBM PERSONAL COMPUTER Xli 11/08/82
5934 5935 5936 5931 5938 5939 5940 5941 5942 5943 5944 5945 5946 5941 5948 5949 5950 595 I 5952 5953 5954 5955 5956 5951 5958 5959 5960 5961 5962
;------------
----------------
-------------
PRINT A SEGMENT VALUE TO LOOK LIKE A 20 BIT ADDRESS
;
OX MUST CONTAIN SEGMENT VALUE TO BE PRINTED
PRT SEG PROC
-
MOV
CALL
MaV
CALL
Mav
CALL
Mav
CALL
RET
PRT SEC ENDP
NEAR AL,CH XPC BYTE AL,DL XPC BYTE AL,'O' PRT HEX AL.' , PRT_HEX
; GET MS8 ;LSB ;PRINTA'O' ;SPACE
CODE
ENDS
.--------PO-W-ER ON RE-S-E-T--V-E-C-T-O-R----
VECTOR SEGMENT AT OFFFFH
;----- POWER ON RESET
JMP
RESET
DB
· I 1/08/82'
RELEASE MARKER
5963 VECTOR ENOS
5964
END
5-176 PC-XT System BIOS (11/08/82)
SECTION 6. INSTRUCTION SET
8088 Register Model ........................... 6-3
Operand Summary .......................... 6-4
Second Instruction Byte Summary .............. 6-4
Memory Segmentation Model .................. 6-5
Segment Override Prefix ...................... 6-6
Use of Segment Override ..................... 6-6
8088 Instruction Set ............................ 6-7
Data Transfer .............................. 6-7
Arithmetic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-10
Logic .................................... 6-13
String Manipulation ........................ 6-15
Control Transfer ........................... 6-16
8088 Instruction Set Matrix ..................... 6-20
8088 Conditional Transfer Operations ............. 6-22
Processor Control ............................. 6-23
8087 Coprocessor Instruction Set ................. 6-24
Data Transfer ............................. 6-24
Comparison .............................. 6-25
Arithmetic ................ . . . . . . . . . . . . . . .. 6-26
Transcendental ............................ 6-28
Constants ................................ 6-28
Processor Control .......................... 6-29
Instruction Set 6-1
Notes:
6-2 Instruction Set
8088 Register Model
Notes:
if d = I then "to"; if d = 0 then "from"
if w = I then word instruction; if w = 0 then byte instruction
if s:w 01 then 16 bits of immediate data from the operand
if s:w I I then an immediate data byte is signed extended to form
the 16-bit operand
if v = 0 the "count" = 1; if v = I the "count" is in (cL) or (CX)
x = don't care
z is used for string primitives for comparison with ZF FLAG
AL 8-bit accumulator
AexX
16-bit accumulator
= Count register
DS = Data segment
ES = Extra segment
Above/below refers to unsigned value
Greater = more positive;
Less = less positive (more negative) signed values
AX:
AH
AL
Accumulator
BX:
BH
BL
Base
CX:
CH
CL
Count
DX:
DH
DL
Data
General Register File
SP
Stack Pointer
BP
Base Pointer
SI
Source Index
DI
Destination Index
IP
FLAGSH
FLAGSL
Instruction Pointer Status Flags
~
CS
Code Segment
DS
Data Segment
Segment
Register File
SS
Stack Segment
ES
Extra Segment
Instructions which reference the flag register file as a 16-bit object, use the symbol FLAGS to represent the file:
15
7
o
~X~X~X~X~I-OF~I-D~FI--'F~I-TF~I-S~FI-Z-F~I-X~I-AF~I-x~l~p-F~I-X'-C-'F
X Don't Care
Instruction Set 6-3
AF: Aux iIi ary Carry - BCD
CF: Carry Flag PF: Parity Flag
}
SF: Sign Flag
ZF: Zero Flag
DF: Direction Flag
}
IF: Interrupt Enable Flag
OF: Overflow Flag (CF + SF)
TF: Trap-Single Step Flag
80SO Flags
8088 Flags
Operand Summary
reg Field Bit Assignments
16-Bit [w ~ 1]
8-Bit [w ~ 0]
000 AX 001 CX 010 DX
all BX 100 SP
101 BP 110 51
111 Dl
000 AL 001 CL 010 DL all BL 100 AH
101 CH
110 DH
111 BH
Segment
00 ES
01 CS
10 55
11 DS
Second Instruction Byte Summary
I mod xxx rim
mod Displacement 00 DISP ~ 0*, disp-low and disp-high are absent 01 DISP = disp-low sign-extended to 16-bits, disp-high is absent 10 DISP = disp-high: di~p-IHw . 11 rim is treated as a reg field
DISP follows 2nd byte of instruction (before data if required)
*except if mod~OO and rim-lID then EA~disp-high: disp-low.
6-4 Instruction Set
Memory Segmentation Model
7
Logical Memory Space
-
0 FFFFF
JKB
code Segment
t
}
XXXXO
.~.
I
~
DisPl,cement
15
0
Offset Addres s
I
I
1- ~ 1
15 :
0
1 I
woc{ MSB LSB
Selected CS 0000 f-
BYTE
Segment SS 0000 r-
Register DS 0000
CS,SS,DS,ES ES
or none
- r - for I/O, INT
0000
\
I Adder
:J--5t,e, 5'9m,ot
Data Segment
Extra Data Segment
9
Physical
I
I
Address Latch
00000
Instruction Set 6-5
Segment Override Prefix
OOlregllO
Use of Segment Override
Operand Register
Default With Override Prefix
IP (Code Address)
CS
SP (Stack Address)
SS
BP (Stack Address or Stack Marker) SS
SI or DI (not including strings)
DS
SI (Implicit Source Address
DS
for strings)
DI (Implicit Destination Address
ES
for strings)
Never Never BP + DS or ES,
or CS ES, SS, or CS ES, SS, or CS
Never
6-6 Instruction Set
8088 Instruction Set
Data Transfer
MOV = Move
Register/Memory to/from Register
100010dw
mod reg rim
Immediate to Register/Memory
1100011w
mod 000 rim
data
data if w
Immediate to Register
1011wreg
data
data if w
Memory to Accumulator
1010000w
addr-low
addr-high
Accumulator to Memory
1010001w
addr-low
addr-high
Register/Memory to Segment Register
10001110
mod o reg rim
Segment Register to Register/Memory
10001100
mod 0 reg rim
PUSH = Push
Register/Memory
11111111
mod 110 rim
Register
01010 reg
Instruction Set 6-7
Segment Register
000 reg 110
POP = POp
Register/Memory
10001111
mod 000 rim
Register
01011reg
Segment Register
000 reg 111
XCHG = Exchange
Register/Memory with Register
1000011w
mod reg rim
Register with Accumulator I0010reg
IN = Input to ALIAX from
Fixed Port
1110010w
port
Variable Port
1110110w
OUT = Output from ALIAX to
Fixed Port
1110011w
port
6-8 Instruction Set
Variable Port (OX) 1110110w
XLAT = Translate Byte to AL
~
11010111
LEA = Load EA to Register
I lOOOl101
mod reg rim
LDS = Load Pointer to DS
I 11000101
mod reg rim
LES = Load Pointer to ES
I 11000100
mod reg rim
LAHF = Load AH with Flags
~
10011111
SAHF = Store AH with Flags
10011110
PUSHF = Push Flags
10011100
POPF = Pop Flags
10011101
Instruction Set 6-9
Arithmetic
ADD = Add
Register/Memory with Register to Either
OOOOOOdw
mod reg rim
Immediate to Register Memory
100000sw
mod 000 rim
data
data if s:w 01
Immediate to Accumulator
0000010w
data
data if w
ADC = Add with Carry
Register/Memory with Register to Either
000100dw
mod reg rim
Immediate to Register/Memory
100000sw
mod 010 rim
data
data if s:w 01
Immediate to Accumulator
0001010w
data
data if w
INC = Increment
Register/Memory
1111111w
mod 000 rim
Register 01000reg
AAA = ASCII Adjust for Add
00110111
6-10 Instruction Set
DAA = Decimal Adjust for Add
00100111
SUB = Subtract
Register/Memory and Register to Either
001010dw
mod reg rim
Immediate from Register/Memory
100000sw
mod 101 rim
data
data if s:w 01
Immediate from Accumulator
0010110w
data
data if w
SBB = Subtract with Borrow
Register/Memory and Register to Either
000110dw
mod reg rim
Immediate from Register/Memory
100000sw
mod 011 rim
data
data if s:w 01
Immediate to Accumulator
0001110w
data
data if w
DEC = Decrement
Register/Memory
1111111w
mod 001 rim
Register Ol001reg
NEG = Change Sign 1111011w I mod 011 rim
Instruction Set 6-11
CMP = Compare
RegisterlMemory and Register
001110dw
mod reg rim
Immediate with RegisterlMemory
100000sw
mod III rim
data
data if s:w = 01
Immediate with Accumulator
0011110w
data
data if w = 1
AAS = ASCII Adjust for Subtract
00111111
DAS = Decimal Adjust for Subtract
00101111
MUL = Multiply (Unsigned)
1111011w
mod 100 rim
IMUL = Integer Multiply (Signed)
1111011w
mod 101 rim
AAM = ASCII Adjust for Multiply
11010100
00001010
DIV = Divide (Unsigned)
1111011w
mod 110 rim
IDIV = Integer Divide (Signed)
1111011w
mod III rim
6-12 Instruction Set
AAD = ASCII Adjust for Divide
I 11010101
00001010
CBW = Convert Byte to Word
~
10011000
CWD = Convert Word to Double Word
10011001
Logic
Shift/Rotate Instructions
NOT = Invert Register/Memory
I 1111011w
mod 010 rim
SHL/SAL = Shift Logical!Arithmetic Left 110100vw I mod 100 rim
SHR = Shift Logical Right
110100vw I mod 101 rim
SAR = Shift Arithmetic Right
I I 1101 OOvw
mod 111 rim
ROL = Rotate Left 110100vw I mod 000 rim
~ ROR = Rotate Right
110100vw
mod 001 rim
Instruction Set 6-13
RCL = Rotate through Carry Left
I 110100vw
mod 010 rim
RCR = Rotate through Carry Right
I I 110100vw
mod 011 rim
AND = And
Register/Memory and Register to Either
001000dw
mod reg rim
Immmediate to Register/Memory
1000000w
mod 100 rim
data
data if w
Immediate to Accumulator
0010010w
data
data if w
TEST = AND Function to Flags; No Result
Register/Memory and Register
1000010w
mod reg rim
Immediate Data and Register/Memory
1111011w
mod 000 rim
data
data if w
Immediate Data and Accumulator
1010100w
data
data if w
OR= Or
Register/Memory and Register to Either
000010dw
mod reg rim
Immediate to Register/Memory
1000000w
mod 001 rim
data
data if w
6-14 Instruction Set
Immediate to Accumulator
0000110w
data
data if w = 1
~
XOR = Exclusive OR
Register/Memory and Register to Either
001100dw
mod reg rim
Immediate to Register/Memory
1000000w
mod 110 rim
data
data if w = 1
Immediate to Accumulator
00110 lOw
data
data if w = 1
String Manipulation
REP = Repeat
1111001z
MOVS = Move String
1010010w
CMPS = Compare String
1010011w
SCAS = Scan String
1010111w
LODS = Load String
1010110w
Instruction Set 6-15
STOS = Store String
1010101w
Control Transfer
CALL = Call
Direct within Segment
11101000
disp-low
Indirect within Segment
11111111
mod 010 rim
Direct Intersegment
10011010
offset-low
seg-low
disp-high
offset-high seg-high
Indirect Intersegment
11111111
mod 011 rim
JMP = Unconditional Jump
Direct within Segment-Short
11101011
disp
Indirect within Segment
11111111
mod 100 rim
Direct Intersegment
11101010
offset-low
offset-h i gh
seg-low
seg-high
6-16 Instruction Set
Indirect Intersegment
11111111
mod 101 rim
RET = Return from Call
Wit h i n Segmen t 11000011
Within Segment Adding Immediate to SP
11000010
data-low
data-high
Intersegment
11001011
Intersegment Adding Immediate to SP
11000010
data-low
data-high
JE/JZ = Jump on Equal/Zero
01110100
disp
JL/JNGE = Jump on Less/Not Greater, or Equal
01111100
disp
JLE/JNG = Jump on Less, or Equal/Not Greater
01111110
disp
JB/JNAE = Jump on Below/Not Above, or Equal
01110010
disp
JBE/JNA = Jump on Below, or Equal/Not Above
01110110
disp
Instruction Set 6-17
JP/ JPE = Jump on Parity/Parity Even
101111010
I disp
JO = Jump on Overflow
I I 01110000
disp
JS = Jump on Sign
I I 01111000
disp
JNE/JNZ = Jump on Not Equal/Not Zero
I I 01110101
disp
JNL/JGE = Jump on Not Less/Greater, or Equal
I I 01111101
disp
JNLE/JG = Jump on Not Less, or Equal/Greater
I I 01111111
d i sp
JNB/JAE = Jump on Not Below/Above, or Equal
I I 01110011
disp
JNBE/JA = Jump on Not Below, or Equal/Above
I I 01110111
disp
JNP/ JPO = Jump on Not Parity/Parity Odd
I I 01111011
disp
JNO = Jump on Not Overflow
01110001
disp
6-18 Instruction Set
JNS = Jump on Not Sign
I I 01111001
disp
~
LOOP = Loop CX Times
I 11100010
disp
LOOPZ/LOOPE = Loop while Zero/Equal
I 11100001
dis p
LOOPNZ/LOOPNE = Loop while Not Zero/Not Equal
I I 11100000
disp
JCXZ = Jump on CX Zero
11100011
disp
Instruction Set 6-19
8088 Instruction Set Matrix
LO
o
2
3
4
5
6
7
HI 0 ADD
ADD
ADD
ADD
ADD ADD PUSH POP
b,b,r/m w,f,r/m b,t,r/m w,t,r/m b, ia w, ia ES
ES
AOC
ADC
ADC
AOC
AOC ADC PUSH POP
b,f,r/m w,f ,rim b,t,r/m w,t,r/m b, i w,i SS
SS
2 AND
AND
AND
AND
AND AND OEG
DAA
b,f,r/m w,f,r/m b,t,r/m w,t,r/m b, i w,i =ES
3 XOR
XOR
XOR
XOR
XOR XOR SEG
AAA
b,f,r/m w,f ,rim b,t,r/m w,t,r/m b, i w,i =S+
4 INC
INC
INC
INC
INC INC INC
INC
AX
ex
DX
BX
SP BP
SI
DI
5 PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH
AX
CX
OX
BX
SP BP
SI
01
6
7 JO
JNO
JBI
JNBI JE/ JNEI JBEI JNBEI
JNAE JAE
JZ JNZ JNA
JA
8 Immed Immed Immed Immed TEST TEST XCHG XCHG b,r/m w,r/m b ,rIm is,r/m b,r/m w,r/m b,r/m w,r/m
9 NOP
XCHG XCHG XCHG XCHG XCHG XCHG XCHG
CX
DX
BX
SP BP
SI
DI
A MOV
MOV
MOV
MOV
MOVS MOVS CMPS CMPS
m AL m AL AL m AL m b w
b
w
B MOV
MOV
MOV
MOV
MOV MOV MOV
MOV
i AL i CL i DL i BL i AH i CH i DH i BH
C
RET
RET
LES LDS
( I+SP)
o Sh ift Sh ift Sh i ft Sh i ft AAM AAD
b
w
b,v W,v
MOV MOV b, i ,r 1m w, i ,r 1m
XLAT
E LOOPNZI LOOPZI LOOP JCXZ IN IN
OUT
OUT
LOOPNE POOPE
b w
b
w
F LOCK
REP
REP
HLT CMC Grp 1 Grp 1
z
b,r/m w,r/m
b byte operation d direct f = from CPU reg i immediate ia = immed. to accum. id = direct is = immed. byte, sign ext. 1 = long ie. intersegment
m = memory rIm = EA is second byte si = short intersegment t = to CPU reg v = variable w = word operation z = zero sr = segment register
6-20 Instruction Set
LO
8
9
A
B
C
D
E
HI 0 OR
OR
OR
OR
b,f,r/m w,f,r/m b,t,r/m w,t,r/m b, i
OR PUSH w, i CS
SBB
SBB
SBB
SBB SBB
b,f,r/m w,f,r/m b,t,r/m w,t,r/m b, i
SBB PUSH
POP
w, i DS
DS
2 SUB
SUB
SUB
SUB
SUB
b,f,r/m w,f,r/m b,t,r/m w,t,r/m b, i
SUB SEG=
DAS
w, i CS
CMP
CMP
CMP
CMP
CMP
b,f,r/m w,f,r/m b,t,r/m w,t,r/m b, i
CMP SEG= AAS w, i CS
4 DEC
DEC
DEC
DEC
DEC
DEC DEC
DEC
AX
CX
DX
BX
SP
BP SI
DI
5 POP
POP
POP
POP
POP
POP POP
POP
AX
CX
DX
BX
SP
BP SI
DI
6
7 JS
JNS
JPI
JPE
JNPI JL/
JPO
JNGE
JNL/ JLEi JGE JNG
JNLEi JG
8 MOV
MOV
MOV
MOV
MOV
LEA MOV
POP
b,f,r/m w,f ,rim b,t,r/m w,t,r/m sr,t,r/m
sr,f,r/m rim
9 CBW
CWD
CALL
WAIT PUSHF POPF SAHF
LAHF
CX
I,d
BX
SP
BP SI
DI
A TEST
b, i
TEST
W, i
STOS b
STOS LODS
w
b
LODS SCAS w b
SCAS w
B MOV
MOV
MOV
MOV
MOV
MOV MOV
MOV
i AX i CX i DX
i BX i SP
i BP i SI
i DI
C
RET
RET
INT
INT INTO
IRET
1, ( I+SP) 1
Type 3 (Any)
D ESC
ESC
ESC
ESC
ESC
ESC ESC
ESC
0
1
2
3
4
5
6
7
CALL JMP
JMP
JMP
IN
IN OUT
OUT
d
d
I,d
5 i ,d v,b
v,w v,b
v,w
F CLC
STC
CLI
STI
CLD
STD Grp 2 Grp 3 b,r/m w,r/m
where:
mod rim
000
001 010 011 100
101 110 111
Immed
ADD OR ADC SBB AND
SUB XOR CMP
Shift Grp 1
ROL ROR RCL RCR SHL/SAL SHR -- SAR
TEST -- NOT NEG MUL
IMUL DIV DIV
Grp 2
INC DEC CALL CALL JMP id 1, id id
JMP PUSH - 1, i d
Instruction Set 6-21
8088 Conditional Transfer Operations
Instruction
Condition
Interpretation
JE or JZ JL or JNGE
ZF = 1
::equa.l." orll"zero"
II
(SF xor oF) =1 "less or not"grea~,er or equal"
JLE or JNG
((SF xor OF) or less or equal or not greater
ZF) = 1
JB or JNAE or JC CF = 1
::belowll or "notllabov~ or equal::
JBE or JNA
(CF or zF) = 1 "bel~w W eqH al .or not "above
JP or JPE
PF = 1
parity or parity even
JO
OF = 1
"overflow!!
JS JNE or JNZ
SF = 1 ZF = 0
II.
II
sign
II
I
II
"not equa I or 'not zero
JNL or JGE
(SF xor OF) = 0 ::not less ll or IIgre~ter 8r equal::
JNLE or JG
((SF xor OF) or not less or equal or greater
ZF) = 0
JNB or JAE o~ JNC CF = 0
JNBE or JA
(CF or zFl = 0
tl not Ii not
belowll or "aboxe or llequal:: below or equal or above
JNP or JPO
PF = 0
Iinot parity" or "parity odd"
JNO JNS
OF = 0
SF = 0
Iinot Ii not
osiv.genr"f low"
'Above and below refer to the relation between two unsigned values, while "greater" and "less" refer to the
relation between two signed values.
INT = Interrupt
Type Specified
11001101
Type
Type 3
11001100
INTO = Interrupt on Overflow
11001110
IRET = Interrupt Return
11001111
6-22 Instruction Set
Processor Control
CLC = Clear Carry
STC = Set Carry
1...-_11_1_1_10_0_0_ _ _ _ _. .JI 1 11111001
CMC = Complement Carry NOP = No Operation
11110101
1 LI_10_0_10_0_0_0_ _ _ _ _ _--'
CLD = Clear Direction
STD = Set Direction
1...-_11_1_1_11_0_0_ _ _ _ _----11 I 11111101
CLI = Clear Interrupt
11111010
STI = Set Interrupt
11111011
1 1
/""'"""\
HLT = Halt
11110100
WAIT = Wait
10011011
1 1
LOCK = Bus lock prefix ESC = Escape (to 8087)
11110000
I I
11011xxx
I mod xxx r/ml
Instruction Set 6-23
8087 Coprocessor Instruction Set
The following is an instruction set summary for the 8087 coprocessor. In the following, the bit pattern for escape is 11011.
MF = Memory format
rIm
Operand Address
00 - 32-bit Real 01 - 32-bit Integer 10 - 64-bit Real 11 - 64-bit Integer
000
(BX) + (S I ) + DISP
001
(BX) + (D I ) + DISP
010
(BP) + (S I ) + DISP
011
(BP) + ( DI ) + DISP
100
(S I ) + DISP
101
(D I ) + DISP
110
(BP) + DISP*
100
(BX) + DISP
DISP follows 2nd byte of instruction (before data if required) *except if mod=OO and r/m-110 then EA=disp-high: disp-low.
I""
Data Transfer
FLD = Load
IntegerlReal Memory to ST(O)
escape MF 1 mod 000 rIm
disp-low
Long Integer Memory to ST(O)
escape 111
mod 101 rIm
disp-low
Temporary Real Memory to ST(O)
escape 011
mod 101 rIm
disp-low
BCD Memory to ST(O)
escape 111
mod 100 rIm
disp-low
ST(i) to ST(O)
escape 001
11000ST(i)
disp-high disp-high disp-high disp-high
6-24 Instruction Set
FST = Store
ST(O) to Integer/Real Memory
escape MF 1 mod 010 rim
disp-low
~
ST(O) to ST(i)
escape 101
11010 ST(i)
FSTP = Store and Pop
ST(O) to Integer/Real Memory
escape MF 1 mod 011 rim
disp-low
ST(O) to Long Integer Memory
escape 111
mod 111 rim
disp-low
ST(O) to Temporary Real Memory
escape 011
mod 111 rim
disp-low
ST(O) to BCD Memory
escape 111
mod 110 rim
disp-low
ST(O) to ST( i )
escape 101
11011 ST(i)
FXCH = Exchange ST(i) and ST(O)
escape 001
11001 ST(i)
Comparison
FCOM = Compare
Integer/Real Memory to ST(O)
escape MF 0 mod 010 rim
disp-low
disp-high
disp-high disp-high disp-high disp-high
disp-high
Instruction Set 6-25
ST(i) to ST(O)
escape 000
11010 ST( i)
FCOMP = Compare and Pop
Integer/Real Memory to ST(O)
escape MF 0 mod 011 r /m
disp-low
ST( i) to ST(O)
escape 000
11010 ST(i)
disp-high
FCOMPP = Compare ST(i) to ST(O) and Pop Twice
I escape 110
11011001
FTST = Test ST(O)
I escape 001
11100100
FXAM = Examine ST(O)
escape 001
11100101
Arithmetic
FADD = Addition
Integer/Real Memory with ST(O)
escape MF 0 mod 000 rim
disp-low
ST(i) and ST(O)
escape dPO
11000 ST(i)
FSUB = Subtraction
Integer/Real Memory with ST(O)
escape MF 0 mod lOR rim
disp-low
disp-high disp-high
6-26 Instruction Set
5T( i) and 5T(0)
escape dPO
111 OR r /m
FMUL = Multiplication
Integer/Real Memory with 5T(0)
escape MF 0 mod 001 r /m
disp-low
5T(i) and 5T(0)
escape dPO
11001 rim
FDIV = Division
Integer/Real Memory with 5T(0)
escape MF 0 mod 11R rim
disp-low
5T(i) and 5T(0)
escape dPO
1111R rim
disp-high disp-high
~ FSQRT = Square Root of ST(O)
I escape 001
11111010
FSCALE = Scale ST(O) by ST(1)
I escape 001 I 11111101
FPREM = Partial Remainder of ST(O) -;- ST(1)
I escape 001
11111000
FRNDINT = Round ST(O) to Integer
I escape 001 I 11111100
~ FXTRACT = Extract Components of ST(O)
escape 001
11110100
Instruction Set 6-27
FADS = Absolute Value of ST(O)
I escape 001
11100001
FCHS = Change Sign of ST(O)
I I escape 001
11100000
Transcendental
FPTAN = Partial Tangent of ST(O)
I I escape 001 11110010
FPATAN = Partial Arctangent of ST(O) -;- ST(1)
I I escape 001 11110011
F2XM1 = 2sT(O) -1
I I escape 001 11110000
FYL2X = ST(1) X Log2 [ST(O)]
I I escape 001 11110001
FYL2XP1 = ST(1) X Log2 [ST(O) + 1]
I I escape 001 11111001
Constants
FLDZ = Load + 0.0 into ST(O)
I escape 001
11101110
FLD1 = Load + 1.0 into ST(O)
escape 001
11101000
6-28 Instruction Set
FLOPI = Load 'TT into ST(O)
I escape 001
11101011
~
FLOL2T = Load Log2 10 into ST(O)
I I escape 001
11101001
FLOLG2 = Load LoglO 2 into ST(O)
I I escape 001
11101100
FLDLN2 = Load Loge 2 into ST(O)
I I escape 001
11101101
Processor Control
FINIT = Initialize NDP
I escape 011
11100011
FENI = Enable Interrupts
I escape 011
11100000
FDISI = Disable Interrupts
I escape 011
11100001
FLOCW = Load Control Word
escape 001
mod 101 rim
disp-1ow
FSTCW = Store Control Word
escape 001
modl11 rim
disp-low
FSTSW = Store Status Word
escape 101
mod111 rim
disp-low
disp-high disp-high disp-high
Instruction Set 6-29
FCLEX = Clear Exceptions escape 011 I 11100010
FSTENV = Store Environment
escape 001 modl10 rim
disp-low
FLDENV = Load Environment
escape 001 mod100 rim
disp-low
FSAVE = Save State
escape 101 mod110 rim
disp-low
FRSTOR = Restore State
escape 101 mod100 rim
disp-low
FINCSTP = Increment Stack Pointer
escape 001 11110111
FDECSTP = Decrement Stack Pointer
escape 001 11110110
FFREE = Free ST(i)
I escape 001 11000ST(i)
FNOP = No Operation
escape 001 I 11010000
FWAIT = CPU Wait for NDP
10011011
disp-high disp-high disp-high disp-high
6-30 Instruction Set
Notes: ST(O) = Current Stack top ST(i) = ilh register below Stack top d = Destination
O-Destination is ST(O)
I-Destination is ST(i)
P=POP O-NoPop I-Pop ST(O) R = Reverse O-Destination (op) Source I-Source (op) Destination For FSQRT: -O~ST(O)~+oo For FSCALE: _215~ST(1)< + 215 and ST(1) interger For F2XM1: 0 ~ST(O) ~2-1 For FYL2X: O<St(O)<oo - oo<ST(1)<+oo
For FYL2XP1: 0< I ST(O) I «2-12)/2 - oo<ST(1)<00
For FPTAN: O~ST(O)<'IT/4 For FPATAN: O~ST(O)<ST(1)<+oo
Instruction Set 6-31
Notes:
6-32 Instruction Set
SECTION 7. CHARACTERS, KEYSTROKES, AND COLORS
Character Codes ............................... 7-3
Quick Reference .............................. 7-14
Characters, Keystrokes, and Colors 7-1
Notes:
7-2 Characters, Keystrokes, and Colors
Character Codes
As Text Attributes
Value lex Dec Sym
As Characters
Color/Graphics Monitor Adapter
Keystrokes Modes Background Foreground
IBM Monochrome
Display Adapter
00 0 Blank Gtrl2 (Null)
Black
Black
Non-Display
02 2
04 4 05 06 6
08 8
·~··+··
Gtll Gtrl B Gtrl Gtrl D Gtrl Gtrl F Gtrl G
Gtrl H,
Backspace,
Shift
Backspace
Black Black Black Black
Green Gyal Red Magenta Brown Light Grey Dark Grey
Normal
Normal Normal Normal Normal Non-Display
09 9
OA 10
OB 11 OG 12 OD 13
OE OF 15 10 16
12 18 13 19 14 20
21
17 23
0
Gtrll
Gtrl J, Gtrl.-.J
d
Gtrl K
Q Gtrl L
j
Gtrl M,..,J, Shift.....-J
~
Gtrl
~
GtrlO
... Gtrl P
!
!!
q-r
-§
~
Gtrl R Gtrl S Gtrl T Gtrl U Gtrl Gtrl W
Black Black Black Black Black
Black BI,
Blue
Blue
Light Blue High Intensity Underline
Light Green High Intensity
Ligl : Gyal Light Red Light Magenta Yell, White Black
Green Gyan
'V'"\'/''' ""
Brown Light Grey
ligh
ity
High Intensity
High Intensity
High Intensity
tigl
lsity
Normal
Underline
Normal
Normal
I
Normal N, II
Normal
Characters, Keystrokes, and Colors 7-3
As Text Attributes
Value Hex Dec
As Characters
Color/Graphics Monitor Adapter
Symbol Keystrokes Modes Background Foreground
IBM Monochrome
Display Adapter
18 24
1
Gtrl X
Blue
Dark Grey H ig h Intensity
19 25
!
Gtrl Y
Blue
Light Blue High Intensity Underline
1A 26
~
Ctrl Z
Blue
Light Green High Intensity
1B 27
1C 28 1D 29 1E 30 1F 31 20 32
<-
L
<------+
...
....
Blank Space
Ctrl [, Esc, Shift Esc, Crtl Esc
Ctrl \
Ctrl J
Ctrl6
Ctrl-
Space Bar, Shift, Space, Gtrl Space, Alt Space
Blue
Light Gyan High Intensity
Blue Blue
Blue Blue Green
Light Red Light Magenta Yellow White Black
High Intensity High Intensity
High Intensity H ig h Intensity Normal
21 33
!
22 34
"
23 35
#
24 36
$
!
Shift Green
Blue
Underline
"
Shift Green
Green
Normal
#
Shift Green
Cyan
Normal
$
Shift Green
Red
Normal
25 37
%
26 38
&
,
27 39
%
Shift Green
&
Shift Green
,
Green
Magenta Brown Light Grey
Normal Normal Normal
28 40
(
29 41
)
2A 42
*
2B 43
+
2G 44
,
2D 45
-
(
Shift Green
Dark Grey High Intensity
)
Shift Green
Light Blue H ig h Intensity
Underline
*
Note 1 Green
Light Green High Intensity
+
Shift Green
Light Cyan H ig h Intensity
,
Green
Light Red High Intensity
-
Green
Light
High Intensity
Magenta
2E 46
Note 2 Green
Yellow
High Intensity
7-4 Characters, Keystrokes, and Colors
As Text Attributes
Value
As Characters
Color/Graphics Monitor Adapter
Hex Dec Symbol Keystrokes Modes Background Foreground
IBM Monochrome
Display Adapter
2F 47
30 48
o
Green
o
Note 3 Cyan
White Black
High Intensity Normal
31 49
Note 3 Cyan
Blue
Underline
32 50
2
2
Note 3 Cyan
Green
Normal
33 51
3
3
Note 3 Cyan
Cyan
Normal
34 52
4
4
Note 3 Cyan
Red
Normal
35 53
5
5
Note 3 Cyan
Magenta
Normal
36 54
6
6
Note 3 Cyan
Brown
Normal
37 55
7
7
Note 3 Cyan
Light Grey Normal
38 56
8
8
Note 3 Cyan
Dark Grey High Intensity
39 57
9
9
Note 3 Cyan
Light Blue
High Intensity Underline
3A 58
Shift Cyan
Light Green High Intensity
3B 59
3C 60
<
3D 61
3E 62
>
3F 63
?
40 64
@
41 65
A
42 66
B
43 67
C
44 68
D
45 69
E
46 70
F
47 71
G
48 72
H
49 73
4A 74
J
Cyan
<
Shift Cyan
Cyan
>
Shift Cyan
?
Shift Cyan
@
Shift Red
A
Note 4 Red
B
Note 4 Red
C
Note 4 Red
D
Note 4 Red
E
Note 4 Red
F
Note 4 Red
G
Note 4 Red
H
Note 4 Red
Note 4 Red
J
Note 4 Red
Light Cyan High Intensity
Light Red High Intensity
Light Magenta
H Ig h Intensity
Yellow
High Intensity
White
High Intensity
Black
Normal
Blue
Underline
Green
Normal
Cyan
Normal
Red
Normal
Magenta
Normal
Brown
Normal
Light Grey Normal
Dark Grey High Intensity
Light Blue High Intensity Underline
Light Green High Intensity
Characters, Keystrokes, and Colors 7-5
As Text Attributes
Value Hex Dec
As Characters
Color/Graphics Monitor Adapter
Symbol Keystrokes Modes Background Foreground
IBM Monochrome
Display Adapter
4B 75
K
K
Note 4 Red
Light Cyan High Intensity
4C 76
L
L
Note 4 Red
Light Red High Intensity
40 77
M
M
Note 4 Red
Light Magenta
High Intensity
4E 78
N
N
Note 4 Red
Yellow
High Intensity
4F 79
0
0
Note 4 Red
White
High Intensity
50 80
I?
51 81
Q
P
Note 4 Magenta Black
Q
Note 4 Magenta Blue
Normal Underline
52 82
R
R
Note 4 Magenta Green
Normal
53 83
S
54 84
T
55 85
U
S
Note 4 Magenta Cyan
Normal
T
Note4 Magenta Red
Normal
U
Note 4 Magenta Magenta Normal
56 86
V
V
Note 4 Magenta Brown
Normal
57 87
W
W
Note 4 Magenta Light Grey Normal
58 88
X
59 89
Y
X
Note 4 Magenta Dark Grey High Intensity
Y
Note4 Magenta Light Blue H ig h Intensity
Underline
5A 90
Z
5B 91
[
5C 92
\
50 93
1
Z
Note 4 Magenta Light Green High Intensity
[
Magenta Light Cyan High Intensity
\
Magenta Light Red High Intensity
1
Magenta Light
High Intensity
Magenta
5E 94
A
5F 95
-
60 96
,
61 97
a
62 98
b
63 99
c
64 100
d
65 101
e
66 102
I
A
Shilt Magenta Yellow
High Intensity
-
Shilt Magenta White
,
Brown
Black
High Intensity Normal
a
Note 5 Brown
Blue
Underline
b
Note 5 Brown
Green
Normal
c
Note 5 Brown
Cyan
Normal
d
Note 5 Brown
Red
Normal
e
Note 5 Brown
Magenta Normal
I
Note 5 Brown
Brown
Normal
7-6 Characters, Keystrokes, and Colors
As Text Attributes
Value
As Characters
Color/Graphics Monitor Adapter
Hex Dec Symbol Keystrokes Modes Background Foreground
IBM Monochrome
Display Adapter
67 103
g
g
Note 5 Brown
Light Grey Normal
68 104
h
h
Note 5 Brown
Dark Grey High Intensity
69 105
i
i
Note 5 Brown
Light Blue High Intensity
Underline
6A 106
j
j
Note 5 Brown
Light Green High Intensity
6B 107
k
6e 108
I
6D 109
m
6E 110
n
6F 111
0
70 112
P
71 113
q
72 114
r
73 115
s
74 116
t
75 117
u
76 118
v
77 119
w
78 120
x
79 121
Y
7A 122
z
7B 123
{
7C 124
7D 125
I
7E 126
-
7F 127
f::,.
k I m
n
0
P q r s t u v w x Y
z {
I I
I
-
Ctrl -
Note 5 Brown
Light Cyan High Intensity
Note 5 Brown
Light Red High Intensity
Note 5 Brown
Light Magenta
High Intensity
Note 5 Brown
Yellow
High Intensity
Note 5 Brown
White
High Intensity
Note 5 Light Grey Black
Reverse Video
Note 5 Light Grey Blue
Underline
Note 5 Light Grey Green
Normal
Note 5 Light Grey Cyan
Normal
Note 5 Light Grey Red
Normal
Note 5 Light Grey Magenta Normal
Note 5 Light Grey Brown
Normal
Note 5 Light Grey Light Grey Normal
Note 5 Light Grey Dark Grey Reverse Video
Note 5 Light Grey Light Blue H ig h Intensity Underline
Note 5 Light Grey Light Green High Intensity
Shift Light Grey Light Cyan High Intensity
Shift Light Grey Light Red High Intensity
Shift
Light Grey Light Magenta
High Intensity
Shift Light Grey Yellow
High Intensity
Light Grey White
High Intensity
Characters, Keystrokes, and Colors 7-7
As Text Attributes
Value Hex Dec
As Characters
Color/Graphics Monitor Adapter
Symbol Keystrokes Modes Background Foreground
IBM Monochrome
Display Adapter
'* '* '* '* 80 to FF Hex are Flashing In both Color & IBM Monochrome '* '* * '*
80 128
C
Alt 128 Note 6 Black
Black
Non-Display
81 129
U
82 130
e
83 131
a
84 132
a
Alt 129 All 130 All 131 All 132
Note 6 Black Nole 6 Black Note 6 Black Nole 6 Black
Blue Green Cyan Red
Underline Normal Normal Normal
85 133
Ii
Alt 133 Note 6 Black
Magenta Normal
86 134
a
Alt 134 Note 6 Black
Brown
Normal
87 135 88 136
" e
89 137
e
8A 138
e
8B 139
.,
Alt 135 Alt 136 Alt 137
Note 6 Black Note 6 Black Note 6 Black
Alt 138 Alt 139
Note 6 Black Note 6 Black
Light Grey Normal Dark Grey Non-Display Light Blue High Intensity
Underline Light Green High Intensity Light Cyan High Intensity
8C 140
I
All 140 Note 6 Black
Light Red High Intensity
8D 141
I
8E 142
A
Alt 141 Note 6 Black Alt 142 Note 6 Black
Light Magenta
Yellow
High Intensity High Intensity
8F 143
A
90 144
E
Alt 143 Alt 144
Note 6 Black Note 6 Blue
White Black
High Intensity Normal
91 145
III
All 145 Note 6 Blue
Blue
Underline
92 146 A:
All 146 Note 6 Blue
Green
Normal
93 147
0
All 147 Note 6 Blue
Cyan
Normal
94 148
6
Alt 148 Note 6 Blue
Red
Normal
95 149
0
Alt 149 Note 6 Blue
Magenta Normal
96 150
U
Alt 150 Note 6 Blue
Brown
Normal
97 151
U
Alt 151 Note 6 Blue
Light Grey Normal
98 152
Y
99 153
6
9A 154
U
Alt 152 Alt 153
Note 6 Blue Nole 6 Blue
Alt 154 Nole 6 Blue
Dark Grey High Inlensity Lighl Blue High Intensity
Underline
Lighl Green High Intensity
7-8 Characters, Keystrokes, and Colors
As Text Attributes
Value Hex Dec 9B 155
As Characters
Color/Graphics Monitor Adapter
Symbol Keystrokes Modes Background Foreground
IBM Monochrome
Display Adapter
¢
Alt 155 Note 6 Blue
light Cyan High Intensity
9C 156
£
Alt 156 Note 6 Blue
light Red High Intensity
90 157
¥
9E 158
Pt
9F 159
f
AO 160
a
A1 161
I
A2 162
6
A3 163
U
A4 164
n
A5 165
N
A6 166
a
A7 167
~
A8 168
~
A9 169 r-
AA 170 --,
AB 171
1(,
AC 172
V.
AD 173
i
AE 174 «
AF 175 »
BO 176 ...........,
I B1 177 I B2 178
B3 179
B4 180 -
== B5 181
B6 182 ---I
All 157 Note 6 Blue
Alt 158 Alt 159 Alt 160 Alt 161 Alt 162 Alt 163 Alt 164 Alt 165 Alt 166 Alt 167 Alt 168 Ail 169
Note 6 Blue Note 6 Blue Note 6 Green Note 6 Green Note 6 Green Note 6 Green Note 6 Green Note 6 Green Note6 Green Note 6 Green Note 6 Green Note6 Green
Alt 170 Alt 171 All 172 All 173
Note 6 Green Note 6 Green Note 6 Green Note 6 Green
Alt 174 Alt 175 All 176 Alt 177 Alt 178 All 179 All 180 All 181 All 182
Note 6 Green Note 6 Green Note 6 Cyan Note 6 Cyan Note 6 Cyan Note 6 Cyan Note 6 Cyan Note 6 Cyan Note 6 Cyan
light Magenta
High Intensity
Yellow
High Intensity
White
High Intensity
Black
Normal
Blue
Underline
Green
Normal
Cyan
Normal
Red
Normal
Magenta Normal
Brown
Normal
Light Grey Normal
Dark Grey High Intensity
light Blue High Intensity Underline
light Green High Intensity
light Cyan High Intensity
light Red High Intensity
light Magenta
High Intensity
Yellow
High Intensity
White
High Intensity
Black
Normal
Blue
Underline
Green
Normal
Cyan
Normal
Red
Normal
Magenta Normal
Brown
Normal
Characters, Keystrokes, and Colors 7-9
As Text Attributes
Value Hex Dec
As Characters
Color/Graphics Monitor Adapter
Symbol Keystrokes Modes Background Foreground
IBM Monochrome
Display Adapter
B7 183 - n
B8 184 ==l
W B9 185
h
BA 186
Alt 183 Alt 184 Alt 185
Note 6 Cyan Note 6 Cyan Note 6 Cyan
Alt 186 Note 6 Cyan
Light Grey Normal Dark Grey High Intensity Light Blue High intensity
Underline Light Green High Intensity
BB 187 ~
2 J BC 188 WJ BD 189
B BE 190
BF 191 h CO 192 L -
Alt 187 Alt 188 Alt 189
Alt 190 Alt 191 Alt 192
Note 6 Cyan Note 6 Cyan Note 6 Cyan
Note 6 Cyan Note 6 Cyan Note 6 Red
Light Cyan Light Red Light Magenta Yellow White Black
High Intensity High Intensity High Intensity
High Intensity High Intensity Normal
C1 193
Alt 193 Note 6 Red
Blue
Underline
C2 194 C3 195 C4 196
1-=
Alt 194 Alt 195 Ait 196
Note 6 Red Note 6 Red Note 6 Red
Green Cyan Red
Normal Normal Normal
C5 197
Alt 197 Note 6 Red
Magenta Normal
C6 198 C7 199 C8 200
I
1=
~
Alt 198 Alt 199 Alt 200
Note 6 Red Note 6 Red Note 6 Red
Brown Light Grey Dark Grey
Normal Normal High Intensity
C9 201
II
CA 202 ~---c:=
Alt 201 Alt 202
Note 6 Red Note 6 Red
Light Blue High Intensity Underline
Light Green High Intensity
CB 203 r---, r -
CC 204 I~
CD 205
Alt 203 Alt 204 Alt 205
CE 206 ~!:=
CF 207
DO 208 TT
Alt 206 All 207 Alt 208
Note 6 Red Note 6 Red Note 6 Red
Note 6 Red Note 6 Red Note 6 Magenta
Light Cyan Light Red Light Magenta Yellow White Black
High Intensity High Intensity High Intensity
High Intensity High Intensity Normal
7-10 Characters, Keystrokes, and Colors
Value
Hex Dec
As Text Attributes
IBM Monochrome
Display Adapter
Characters, Keystrokes, and Colors 7-11
As Text Attributes
Value Hex Dec
As Characters
Color/Graphics Monitor Adapter
Symbol Keystrokes Modes Background Foreground
IBM Monochrome
Display Adapter
EC 236
~
Alt 236 Note 6 Brown
Light Red High Intensity
ED 237
<I>
Alt 237 Note 6 Brown
Light Magenta
High Intensity
EE 238
EF 239
n
Alt 238 All 239
Note 6 Brown Note 6 Brown
Yellow White
High Intensity High Intensity
FO 240
-
F1 241
±
Alt 240 Alt 241
Note 6 Light Grey Black Note 6 Light Grey Blue
Reverse Video Underline
F2 242
2-
F3 243
<;
F4 244
r
F5 245 J
Alt 242 Alt 243 Alt 244 Alt 245
Note6 Light Grey Green Note 6 Light Grey Cyan Note 6 Light Grey Red Note 6 Light Grey Magenta
Normal Normal Normal Normal
F6 246
Alt 246 Note 6 Light Grey Brown
Normal
"" F7 247
F8 248
0
· F9 249
FA 250
·
r FB 251
FC 252
n
FD 253
2
· FE 254
FF 255 BLANK
Alt 247 Alt 248 Alt 249
Alt 250 Alt 251 Alt 252 Alt 253
Alt 254 Alt 255
Note 6 Light Grey Light Grey Normal
Note 6 Light Grey Dark Grey Reverse Video
Note 6 Light Grey Light Blue Hig h Intensity Underline
Note 6 Light Grey Light Green High Intensity
Note 6 Light Grey Light Cyan High Intensity
Note 6 Light Grey Light Red High Intensity
Note 6 Light Grey Light Magenta
High Intensity
Note 6 Light Grey Yellow
High Intensity
Note 6 Light Grey White
High Intensity
7-12 Characters, Keystrokes, and Colors
Notes:
1. Asterisk (*) can be typed using two methods: press the (PrtSc/*) key or, in the shift mode, press the 8 key.
2. Period (.) can be typed using two methods: press the. key or, in the shift or Num Lock mode, press the Del key.
3. Numeric characters 0-9 can be typed using two methods: press the numeric keys on the top row of the keyboard or, in the shift or Num Lock mode, press the numeric keys in the keypad portion of the keyboard.
4. Uppercase alphabetic characters (A-Z) can be typed in two modes: the shift mode or the Caps Lock mode.
5. Lowercase alphabetic characters (a-z) can be typed in two modes: in the normal mode or in Caps Lock and shift mode combined.
6. The three digits after the Alt key must be typed from the numeric keypad. Character codes 001-255 may be entered in this fashion (with Caps Lock activated, character codes 97 -122 will display uppercase).
Characters, Keystrokes, and Colors 7-13
Quick Reference
DECIMAL VALUE
·HEXA
DECIMAL
· VALUE
0 0
16 32 1 2
0
0
BLANK [NULLI
~
,BLANK
[SPACEI
1 2 3
-· ,, 1 ~ ....... ·
2
t II
3
·· #
48
3
0 1 2 3
64
4
@
A B C
80
5
p
Q
R S
96
6 ,
a b c
112
7
P
q
r
s
+ 4 4
~ $ 4D T d t
· - 5 5 ~ § % 5 E U e u
6 7
6 7
·
-.l &,
6 F V 7 GW
f g
v
W
8 8
i ( 8HX h x
9 90 !
) 9
I
Y
·
1 .
Y
10 A
----+
+* 11 B cJ +-
· ·
J Z J
z
,· K [ k {
< " 12 C Q L ,
L
1 I I
13 D )1 ~ - - M ] m }
> 14 E ~ ... ·
N n /\
'"\.;
15 F ~ ...
/
?
·
0 -
0 f:J.
7-14 Characters, Keystrokes, and Colors
· ·
DECIMAL
VALUE
128 144 160 176 192 208 224 240
HEIA DECIMAL
8
9 A B CD
E
F
VALUE
0 1
0 1
Cu..
,
E
re
a "
1 "
...
:.:.:.:.:.
:::::
II oc ---
f3 +
2 2 e" IE 0" III
3 4 5
3 4 5
aa,A..-
a
A
0..
0 ,
0
u "
-n '- N- ===
6
6
(\
uA
,
a ---1
" r ->
- lL 7T -<
~ l: r
F
u
J
..
== - J1 ·
7 8 9
IO
7 8 9 A
~
eAe,.-. e
uy..
0 11
c· I
0 I
~
-
_L-r -
tJ I
T ~ ~
cp 0
e · n ·
11 B 12 C 13 D
··
1
¢
Y2 ~ -
, A
, 1
1
£
¥
~ :::::L · ---.lJ
"" 8
n 00 ¢ 2
A 14 E
It
« d
~
I
15 F A J » n
E I
n BLANK 'FF'
Characters. Kevstrokes. and Colors 7-15
Notes:
7-16 Characters, Keystrokes, and Colors
Glossary
This glossary includes terms and definitions from the IBM Vocabulary for Data Processing, Telecommunications, and Office Systems, GC20-1699.
JL. Prefix micro; 0.000001. J-Ls. Microsecond; 0.000 001 second. A. Ampere. ac. Alternating current. accumulator. A register in which the result of an operation is formed. active high. Designates a signal that has to go high to produce an effect. Synonymous with positive true. active low. Designates a signal that has to go low to produce an effect. Synonymous with negative true. adapter. An auxiliary device or unit used to extend the operation of another system. address bus. One or more conductors used to carry the binary-coded address from the processor throughout the rest of the system. algorithm. A finite set of well-defined rules for the solution of a problem in a finite number of steps. all points addressable (APA). A mode in which all points of a displayable image can be controlled by the user. alphameric. Synonym for alphanumeric.
Glossary-!
alphanumeric (A/N). Pertaining to a character set that contains letters, digits, and usually other characters, such as punctuation marks. Synonymous with alphameric.
alternating current (ac). A current that periodically reverses its direction of flow.
American National Standard Code for Information Interchange (ASCII). The standard code, using a coded character set consisting of 7-bit coded characters (8 bits including parity check), used for information exchange between data processing systems, data communication systems, and associated equipment. The ASCII set consists of control characters and graphic characters.
ampere (A). The basic unit of electric current.
A/N. Alphanumeric
analog. (1) Pertaining to data in the form of continuously variable physical quantities. (2) Contrast with digital.
AND. A logic operator having the property that if P is a
I~
statement, Q is a statement, R is a statement,... , then the AND of
P, Q, R,.. .is true if all statements are true, false if any statement is
false.
AND gate. A logic gate in which the output is 1 only if all inputs
are 1.
AND operation. The boolean operation whose result has the
boolean value 1, if and only if, each operand has the boolean
value 1. Synonymous with conjunction.
APA. All points addressable.
ASCII. American National Standard Code for Information
Interchange.
assemble. To translate a program expressed in an assembler
language into a computer language.
assembler. A computer program used to assemble.
Glossary-2
assembler language. A computer-oriented language whose instructions are usually in one-to-one correspondence with computer instructions.
asynchronous transmission. ( 1) Transmission in which the time of occurrence of the start of each character, or block of characters, is arbitrary; once started, the time of occurrence of each signal representing a bit within a character, or block, has the same relationship to significant instants of a fixed time frame. (2) Transmission in which each information character is individually transmitted (usually timed by the use of start elements and stop elements).
audio frequencies. Frequencies that can be heard by the human ear (approximately 15 hertz to 20,000 hertz).
auxiliary storage. (1) A storage device that is not main storage. (2) Data storage other than main storage; for example, storage on magnetic disk. (3) Contrast with main storage.
BASIC. Beginner's all-purpose symbolic instruction code.
~ basic input/output system (BIOS). The feature of the IBM Personal Computer that provides the level control of the major
II0 devices, and relieves the programmer from concern about
hardware device characteristics.
baud. (1) A unit of signaling speed equal to the number of discrete conditions or signal events per second. For example, one baud equals one bit per second in a train of binary signals, one-half dot cycle per second in Morse code, and one 3-bit value per second in a train of signals each of which can assume one of eight different states. (2) In asynchronous transmission, the unit of modulation rate corresponding to one unit of interval per second; that is, if the duration of the unit interval is 20 milliseconds, the modulation rate is 50 baud.
Bec. Block-check character.
beginner's aU-purpose symbolic instruction code (BASIC). A programming language with a small repertoire of commands and a simple syntax, primarily designed for numeric applications.
Glossary-3
binary. (1) Pertaining to a selection, choice, or condition that has two possible values or states. (2) Pertaining to a fixed radix numeration system having a radix of 2.
binary digit. (1) In binary notation, either of the characters 0 or 1. (2) Synonymous with bit.
binary notation. Any notation that uses two different characters,
usually the binary digits 0 and 1.
binary synchronous communications (BSC). A uniform procedure,
using a standardized set of control characters and control
character sequences for synchronous transmission of
binary-coded data between stations.
BIOS. Basic input/output system.
bit. Synonym for binary digit
bits per second (bps). A unit of measurement representing the
number of discrete binary digits transmitted by a device in one
second.
block. (1) A string of records, a string of words, or a character
string formed for technical or logic reasons to be treated as an
entity. (2) A set of things, such as words, characters, or digits,
treated as a unit.
block-check character (BCC). In cyclic redundancy checking, a
character that is transmitted by the sender after each message
block and is compared with a block-check character computed by
the receiver to determine if the transmission was successful.
boolean operation. (1) Any operation in which each of the
operands and the result take one of two values. (2) An operation
that follows the rules of boolean algebra.
bootstrap. A technique or device designed to bring itself into a
desired state by means of its own action; for example, a machine ~ routine whose first few instructions are sufficient to bring the rest
of itself into the computer from an input device.
bps. Bits per second.
Glossary-4
BSe. Binary synchronous communications.
buffer. (1) An area of storage that is temporarily reserved for use in performing an input/output operation, into which data is read or from which data is written. Synonymous with I/O area. (2) A portion of storage for temporarily holding input or output data.
bus. One or more conductors used for transmitting signals or power.
byte. (1) A sequence of eight adjacent binary digits that are operated upon as a unit. (2) A binary character operated upon as a unit. (3) The representation of a character.
e. Celsius.
capacitor. An electronic circuit component that stores an electric charge.
Cartesian coordinates. A system of coordinates for locating a point on a plane by its distance from each of two intersecting ~ lines, or in space by its distance from each of three mutually perpendicular planes.
CAS. Column address strobe.
cathode ray tube (CRT). A vacuum tube in which a stream of electrons is projected onto a fluorescent screen producing a luminous spot. The location of the spot can be controlled.
cathode ray tube display (CRT display). (1) A CRT used for displaying data. For example, the electron beam can be controlled to form alphanumeric data by use of a dot matrix. (2) Synonymous with monitor.
CCITT. International Telegraph and Telephone Consultative Committee.
Celsius (C). A temperature scale. Contrast with Fahrenheit (F).
central processing unit (CPU). Term for processing unit.
Glossary-S
channel. A path along which signals can be sent; for example,
data channel, output channel.
character generator. (1) In computer graphics, a functional unit
that converts the coded representation of a graphic character into
the shape of the character for display. (2) In word processing,
~
the means within equipment for generating visual characters or
symbols from coded data.
character set. (1) A finite set of different characters upon which
agreement has been reached and that is considered complete for
some purpose. (2) A set of unique representations called
characters. (3) A defined collection of characters.
characters per second (cps). A standard unit of measurement for
the speed at which a printer prints.
check key. A group of characters, derived from and appended to
a data item, that can be used to detect errors in the data item
during processing.
clipping. In computer graphics, removing parts of a display image
that lie outside a window.
~
closed circuit. A continuous unbroken circuit; that is, one in
which current can flow. Contrast with open circuit.
CMOS. Complementary metal oxide semiconductor.
code. (1) A set of unambiguous rules specifying the manner in which data may be represented in a discrete form. Synonymous with coding scheme. (2) A set of items, such as abbreviations, representing the members of another set. (3) To represent data or a computer program in a symbolic form that can be accepted by a data processor. (4) Loosely, one or more computer programs, or part of a computer program.
coding scheme. Synonym for code.
collector. An element in a transistor toward which current flows.
color cone. An arrangement of the visible colors on the surface of a double-ended cone where lightness varies along the axis of
Glossary-6
the cone, and hue varies around the circumference. Lightness includes both the intensity and saturation of color.
column address strobe (CAS). A signal that latches the column addresses in a memory chip.
compile. (1) To translate a computer program expressed in a problem-oriented language into a computer-oriented language. (2) To prepare a machine-language program from a computer program written in another programming language by making use of the overall logic structure of the program, or generating more than one computer instruction for each symbolic statement, or both, as well as performing the function of an assembler.
complement. A number that can be derived from a specified number by subtracting it from a second specified number.
complementary metal oxide semiconductor (CMOS). A logic circuit family that uses very little power. It works with a wide range of power supply voltages.
computer. A functional unit that can perform substantial ~ computation, including numerous arithmetic operations or logic
operations, without human intervention during a run.
computer instruction code. A code used to represent the instructions in an instruction set. Synonymous with machine code.
computer program. A sequence of instructions suitable for processing by a computer.
computer word. A word stored in one computer location and capable of being treated as a unit.
configuration. ( 1) The arrangement of a computer system or network as defined by the nature, number, and the chief characteristics of its functional units. More specifically, the term ~ configuration may refer to a hardware configuration or a software configuration. (2) The devices and programs that make up a system, subsystem, or network.
conjunction. Synonym for AND operation.
Glossary-7
contiguous. Touching or joining at the edge or boundary; adjacent.
control character. A character whose occurrence in a particular context initiates, modifies, or stops a control operation.
control operation. An action that affects the recording, processing, transmission, or interpretation of data; for example, starting or stopping a process, carriage return, font change, rewind, and end of transmission.
control storage. A portion of storage that contains microcode.
coordinate space. In computer graphics, a system of Cartesian coordinates in which an object is defined.
cps. Characters per second.
CPU. Central processing unit.
CRe. Cyclic redundancy check.
CRT. Cathode ray tube.
CRT display. Cathode ray tube display.
CTS. Clear to send. Associated with modem control.
cursor. (1) In computer graphics, a movable marker that is used to indicate position on a display. (2) A displayed symbol that acts as a marker to help the user locate a point in text, in a system command, or in storage. (3) A movable spot of light on the screen of a display device, usually indicating where the next character is to be entered, replaced, or deleted.
cyclic redundancy check (CRC). (1) A redundancy check in which the check key is generated by a cyclic algorithm. (2) A system of error checking performed at both the sending and receiving station after a block-check character has been accumulated.
cylinder. (1) The set of all tracks with the same nominal
distance from the axis about which the disk rotates. (2) The
Glossary-8
tracks of a disk storage device that can be accessed without repositioning the access mechanism.
daisy-chained cable. A type of cable that has two or more connectors attached in series.
data. (1) A representation of facts, concepts, or instructions in a formalized manner suitable for communication, interpretation, or processing by human or automatic means. (2) Any representations, such as characters or analog quantities, to which meaning is, or might be assigned.
data base. A collection of data that can be immediately accessed and operated upon by a data processing system for a specific purpose.
data processing system. A system that performs input, processing, storage, output, and control functions to accomplish a sequence of operations on data.
data transmission. Synonym for transmission.
~. dB. Decibel.
dBa. Adjusted decibels.
dc. Direct current.
debounce. (1) An electronic means of overcoming the make/break bounce of switches to obtain one smooth change of signal level. (2) The elimination of undesired signal variations caused by mechanically generated signals from contacts.
decibel. (1) A unit that expresses the ratio of two power levels on a logarithmic scale. (2) A unit for measuring relative power.
decoupling capacitor. A capacitor that provides a low impedance path to ground to prevent common coupling between circuits.
Deutsche Industrie Norm (DIN). (1) German Industrial Norm. (2) The committee that sets German dimension standards.
digit. (1) A graphic character that represents an integer; for example, one of the characters 0 to 9. (2) A symbol that
Glossary-9
represents one of the non-negative integers smaller than the radix. For example, in decimal notation, a digit is one of the characters 0 to 9.
digital. (1) Pertaining to data in the form of digits. (2) Contrast with analog.
DIN. Deutsche Industrie Norm.
DIN connector. One of the connectors specified by the DIN committee.
DIP. Dual in-line package.
DIP switch. One of a set of small switches mounted in a dual in-line package.
direct current (de). A current that always flows in one direction.
direct memory access (DMA). A method of transferring data between main storage and I/O devices that does not require processor intervention.
disable. To stop the operation of a circuit or device.
disabled. Pertaining to a state of a processing unit that prevents the occurrence of certain types of interruptions. Synonymous with masked.
disk. Loosely, a magnetic disk.
diskette. A thin, flexible magnetic disk and a semirigid protective jacket, in which the disk is permanently enclosed. Synonymous with flexible disk.
diskette drive. A device for storing data on and retrieving data from a diskette.
display. (1) A visual presentation of data. (2) A device for visual presentation of information on any temporary character imaging device. (3) To present data visually. (4) See cathode ray tube display.
Glossary-tO
display attribute. In computer graphics, a particular property that is assigned to all or part of a display; for example, low intensity, green color, blinking status.
display element. In computer graphics, a basic graphic element that can be used to construct a display image; for example, a dot, a line segment, a character.
display group. In computer graphics, a collection of display elements that can be manipulated as a unit and that can be further combined to form larger groups.
display image. In computer graphics, a collection of display elements or display groups that are represented together at any one time in a display space.
display space. In computer graphics, that portion of a display surface available for a display image. The display space may be all or part of a display surface.
display surface. In computer graphics, that medium on which display images may appear; for example, the entire screen of a ~ cathode ray tube.
DMA. Direct memory access.
dot matrix. (1) In computer graphics, a two-dimensional pattern of dots used for constructing a display image. This type of matrix can be used to represent characters by dots. (2) In word processing, a pattern of dots used to form characters. This term normally refers to a small section of a set of addressable points; for example, a representation of characters by dots.
dot printer. Synonym for matrix printer.
dot-matrix character generator. In computer graphics, a character generator that generates character images composed of dots.
drawing primitive. A group of commands that draw defined geometric shapes.
DSR. Data set ready. Associated with modem control.
Glossary-ll
DTR. In the IBM Personal Computer, data terminal ready. Associated with modem control.
dual in-line package (DIP). A widely used container for an integrated circuit. DIPs have pins in two parallel rows. The pins are spaced 1/10 inch apart. See also DIP switch.
duplex. (1) In data communication, pertaining to a simultaneous two-way independent transmission in both directions. (2) Contrast with half-duplex.
duty cycle. In the operation of a device, the ratio of on time to idle time. Duty cycle is expressed as a decimal or percentage.
dynamic memory. RAM using transistors and capacitors as the memory elements. This memory requires a refresh (recharge) cycle every few milliseconds. Contrast with static memory.
EBCDIC. Extended binary-coded decimal interchange code.
ECC. Error checking and correction.
edge connector. A terminal block with a number of contacts attached to the edge of a printed-circuit board to facilitate plugging into a foundation circuit.
EIA. Electronic Industries Association.
electromagnet. Any device that exhibits magnetism only while an electric current flows through it.
enable. To initiate the operation of a circuit or device.
end of block (EOB). A code that marks the end of a block of data.
end of file (EOF). An internal label, immediately following the last record of a file, signaling the end of that file. It may include control totals for comparison with counts accumulated during processing.
end-of-text (ETX). A transmission control character used to terminate text.
Glossary-12
end-of-transmission (EOT). A transmission control character used to indicate the conclusion of a transmission, which may have included one or more texts and any associated message headings.
end-of-transmission-block (ETB). A transmission control character used to indicate the end of a transmission block of data when data is divided into such blocks for transmission purposes.
EOB. End of block.
EOF. End of file.
EOT. End-of-transmission.
EPROM. Erasable programmable read-only memory.
erasable programmable read-only memory (EPROM). A PROM in which the user can erase old information and enter new information.
error checking and correction (ECC). The detection and correction of all single-bit errors, plus the detection of double-bit ,~ and some multiple-bit errors.
ESC. The escape character.
escape character (ESC). A code extension character used, in some cases, with one or more succeeding characters to indicate by some convention or agreement that the coded representations following the character or the group of characters are to be interpreted according to a different code or according to a different coded character set.
ETB. End-of-transmj.ssion-block.
ETX. End-of-text.
extended binary-coded decimal interchange code (EBCDIC). A
~ set of 256 characters, each represented by eight bits.
F. Fahrenheit.
Fahrenheit (F). A temperature scale. Contrast with Celsius (C).
Glossary-13
falling edge. Synonym for negative-going edge.
FCC. Federal Communications Commission.
fetch. To locate and load a quantity of data from storage.
FF. The form feed character.
field. (1) In a record, a specified area used for a particular category of data. (2) In a data base, the smallest unit of data that can be referred to.
field-programmable logic sequencer (FPLS). An integrated circuit containing a programmable, read-only memory that responds to external inputs and feedback of its own outputs.
FIFO (first-in-first out). A queuing technique in which the next item to be retrieved is the item that has been in the queue for the longest time.
fixed disk drive. In the IBM Personal Computer, a unit consisting
of nonremovable magnetic disks, and a device for storing data on
and retrieving data from the disks.
.~
flag. (1) Any of various types of indicators used for identification. (2) A character that signals the occurrence of some condition, such as the end of a word. (3) Deprecated term for mark.
flexible disk. Synonym for diskette.
flip-flop. A circuit or device containing active elements, capable of assuming either one of two stable states at a given time.
font. A family or assortment of characters of a given size and style; for example, 10 point Press Roman medium.
foreground. (1) In multiprogramming, the environment in which
high-priority programs are executed. (2) On a color display
~
screen, the characters as opposed to the background.
form feed. (1) Paper movement used to bring an assigned part of a form to the printing position. (2) In word processing, a
Glossary-14
function that advances the typing position to the same character position on a predetermined line of the next form or page.
form feed character. A control character that causes the print or display position to move to the next predetermined first line on the next form, the next page, or the equivalent.
format. The arrangement or layout of data on a data medium.
FPLS. Field-programmable logic sequencer.
frame. (1) In SDLC, the vehicle for every command, every response, and all information that is transmitted using SDLC procedures. Each frame begins and ends with a flag. (2) In data transmission, the sequence of contiguous bits bracketed by and including beginning and ending flag sequences.
g. Gram.
G. (1) Prefix giga; 1,000,000,000. (2) When referring to computer storage capacity, 1,073,741,824. (1,073,741,824 = 2 to the 30th power.)
gate. (1) A combinational logic circuit having one output channel and one or more input channels, such that the output channel state is completely determined by the input channel states. (2) A signal that enables the passage of other signals through a circuit.
Gb. 1,073,741,824 bytes.
general-purpose register. A register, usually explicitly addressable within a set of registers, that can be used for different purposes; for example, as an accumulator, as an index register, or as a special handler of data.
giga (G). Prefix 1,000,000,000.
gram (g). A unit of weight (equivalent to 0.035 ounces).
graphic. A symbol produced by a process such as handwriting, drawing, or printing.
Glossary-1S
graphic character. A character, other than a control character, that is normally represented by a graphic.
half-duplex. (1) In data communication, pertaining to an alternate, one way at a time, independent transmission. (2) Contrast with duplex.
hardware. ( 1) Physical equipment used in data processing, as opposed to programs, procedures, rules, and associated documentation. (2) Contrast with software.
head. A device that reads, writes, or erases data on a storage medium; for example, a small electromagnet used to read, write, or erase data on a magnetic disk.
hertz (Hz). A unit of frequency equal to one cycle per second.
hex. Common abbreviation for hexadecimal. Also, hexidecimal can be noted as X'
hexadecimal. (1) Pertaining to a selection, choice, or condition that has 16 possible different values or states. These values or states are usually symbolized by the ten digits 0 through 9 and the six letters A through F. (2) Pertaining to a fixed radix numeration system having a radix of 16.
r".
high impedance state. A state in which the output of a device is effectively isolated from the circuit.
highlighting. In computer graphics, emphasizing a given display group by changing its attributes relative to other display groups in the same display field.
high-order position. The leftmost position in a string of characters. See also most-significant digit.
hither plane. In computer graphics, a plane that is perpendicular to the line joining the viewing reference point and the view point and that lies between these two points. Any part of an object between the hither plane and the view point is not seen. See also yon plane.
Glossary-16
housekeeping. Operations or routines that do not contribute directly to the solution of the problem but do contribute directly to the operation of the computer.
Hz. Hertz
image. A fully processed unit of operational data that is ready to be transmitted to a remote unit; when loaded into control storage in the remote unit, the image determines the operations of the unit.
immediate instruction. An instruction that contains within itself an operand for the operation specified, rather than an address of the operand.
index register. A register whose contents may be used to modify an operand address during the execution of computer instructions.
indicator. (1) A device that may be set into a prescribed state, usually according to the result of a previous process or on the occurrence of a specified condition in the equipment, and that usually gives a visual or other indication of the existence of the ~ prescribed state, and that may in some cases be used to determine the selection among alternative processes; for example, an overflow indicator. (2) An item of data that may be interrogated to determine whether a particular condition has been satisfied in the execution of a computer program; for example, a switch indicator, an overflow indicator.
inhibited. (1) Pertaining to a state of a processing unit in which certain types of interruptions are not allowed to occur. (2) Pertaining to the state in which a transmission control unit or an audio response unit cannot accept incoming calls on a line.
initialize. To set counters, switches, addresses, or contents of storage to 0 or other starting values at the beginning of, or at prescribed points in, the operation of a computer routine.
input/output (I/O). ( 1) Pertaining to a device or to a channel that may be involved in an input process, and, at a different time, in an output process. In the English language, "input/output" may be used in place of such terms as "input/output data," "input/output signal," and" input/output terminals," when such usage is clear in a given context. (2) Pertaining to a device
Glossary-17
whose parts can be performing an input process and an output process at the same time. (3) Pertaining to either input or output, or both.
instruction. In a programming language, a meaningful expression that specifies one operation and identifies its operands, if any.
instruction set. The set of instructions of a computer, of a programming language, or of the programming languages in a programming system.
intensity. In computer graphics, the amount of light emitted at a display point
interface. A device that alters or converts actual electrical signals between distinct devices, programs, or systems.
interleave. To arrange parts of one sequence of things or events so that they alternate with parts of one or more other sequences of the same nature and so that each sequence retains its identity.
interrupt. (1) A suspension of a process, such as the execution
of a computer program, caused by an event external to that
~
process, and performed in such a way that the process can be
resumed. (2) In a data transmission, to take an action at a
receiving station that causes the transmitting station to terminate
a transmission. (3) Synonymous with interruption.
I/O. Input/output.
I/O area. Synonym for buffer.
irrecoverable error. An error that makes recovery impossible without the use of recovery techniques external to the computer program or run.
joystick. In computer graphics, a lever that can pivot in all directions and that is used as a locator device.
k. Prefix kilo; 1000.
K. When referring to storage capacity, 1024. (1024 = 2 to the 10th power.)
Glossary-I8
KB. 1024 bytes.
key lock. A device that deactivates the keyboard and locks the cover on for security.
kg. Kilogram; 1000 grams.
kHz. Kilohertz; 1000 hertz.
kilo (k). Prefix 1000
kilogram (kg). 1000 grams.
kilohertz (kHz). 1000 hertz
latch. (1) A simple logic-circuit storage element. (2) A feedback loop in sequential digital circuits used to maintain a state.
least-significant digit. The rightmost digit. See also low-order position.
~ LED. Light-emitting diode.
light-emitting diode (LED). A semiconductor device that gives off visible or infrared light when activated.
load. In programming, to enter data into storage or working registers.
look-up table (LUT). (1) A technique for mapping one set of values into a larger set of values. (2) In computer graphics, a table that assigns a color value (red, green, blue intensities) to a color index.
low power Schottky TTL. A version (LS series) of TTL giving a good compromise between low power and high speed. See also transistor-transistor logic and Schottky TTL.
low-order position. The rightmost position in a string of characters. See also least-significant digit.
luminance. The luminous intensity per unit projected area of a given surface viewed from a given direction.
Glossary-19
LUT. Look-up table.
m. (1) Prefix milli; 0.001. (2) Meter.
M. (1) Prefix mega; 1,000,000. (2) When referring to computer storage capacity, 1,048,576. (1,048,576 = 2 to the 20th power.)
rnA. Milliampere; 0.001 ampere.
machine code. The machine language used for entering text and program instructions onto the recording medium or into storage and which is subsequently used for processing and printout.
machine language. (1) A language that is used directly by a machine. (2) Deprecated term for computer instruction code.
magnetic disk. ( 1) A flat circular plate with a magnetizable surface layer on which data can be stored by magnetic recording. (2) See also diskette.
main storage. (1) Program-addressable storage from which instructions and other data can be loaded directly into registers for subsequent execution or processing. (2) Contrast with auxiliary storage.
mark. A symbol or symbols that indicate the beginning or the end of a field, of a word, of an item of data, or of a set of data such as a file, a record, or a block.
mask. (1) A pattern of characters that is used to control the retention or elimination of portions of another pattern of characters. (2) To use a pattern of characters to control the retention or elimination of portions of another pattern of characters.
masked. Synonym for disabled.
matrix. (1) A rectangular array of elements, arranged in rows
~
and columns, that may be manipulated according to the rules of
matrix algebra. (2) In computers, a logic network in the form of
an array of input leads and output leads with logic elements
connected at some of their intersections.
Glossary-20
matrix printer. A printer in which each character is represented by a pattern of dots; for example, a stylus printer, a wire printer. Synonymous with dot printer. MD. 1,048,576 bytes. ~ mega (M). Prefix 1,000,000. megahertz (MHz). 1,000,000 hertz. memory. Term for main storage. meter (m). A unit of length (equivalent to 39.37 inches). MFM. Modified frequency modulation. MHz. Megahertz; 1,000,000 hertz. micro (J-t). Prefix 0.000,001. microcode. (1) One or more microinstructions. (2) A code, representing the instructions of an instruction set, implemented in
r--... a part of storage that is not program-addressable.
microinstruction. (1) An instruction of microcode. (2) A basic or elementary machine instruction. microprocessor. An integrated circuit that accepts coded instructions for execution; the instructions may be entered, integrated, or stored internally. microsecond (J-ts). 0.000,001 second.
milli (m). Prefix 0.001.
milliampere (rnA). 0.001 ampere. millisecond (ms). 0.001 second. ~ mnemonic. A symbol chosen to assist the human memory; for example, an abbreviation such as "mpy" for "multiply."
Glossary-21
mode. (1) A method of operation; for example, the binary mode, the interpretive mode, the alphanumeric mode. (2) The most frequent value in the statistical sense.
modeling transformation. Operations on the coordinates of an
object (usually matrix multiplications) that cause the object to be
rotated about any axis, translated (moved without rotating),
~
and/or scaled (changed in size along any or all dimensions). See
also viewing transformation.
modem (modulator-demodulator). A device that converts serial (bit by bit) digital signals from a business machine (or data communication equipment) to analog signals that are suitable for transmission in a telephone network. The inverse function is also performed by the modem on reception of analog signals.
modified frequency modulation (MFM). The process of varying the amplitude and frequency of the 'write' signal. MFM pertains to the number of bytes of storage that can be stored on the recording media. The number of bytes is twice the number contained in the same unit area of recording media at single density.
modulation. The process by which some characteristic of one wave (usually high frequency) is varied in accordance with another wave or signal (usually low frequency). This technique is used in modems to make business-machine signals compatible with communication facilities.
modulation rate. The reciprocal of the measure of the shortest nominal time interval between successive significant instants of the modulated signal. If this measure is expressed in seconds, the modulation rate is expressed in baud.
module. (1) A program unit that is discrete and identifiable with respect to compiling, combining with other units, and loading. (2) A packaged functional hardware unit designed for use with other components.
modulo check. A calculation performed on values entered into a system. This calculation is designed to detect errors.
modulo-N check. A check in which an operand is divided by a
number N (the modulus) to generate a remainder (check digit)
Glossary-22
that is retained with the operand. For example, in a modulo-7 check, the remainder will be 0, 1,2,3,4,5, or 6. The operand is later checked by again dividing it by the modulus; if the remainder is not equal to the check digit, an error is indicated.
modulus. In a modulo-N check, the number by which the operand is divided.
monitor. Synonym for cathode ray tube display (CRT display).
most-significant digit. The leftmost (non-zero) digit. See also high-order position.
ms. Millisecond; 0.001 second.
multiplexer. A device capable of interleaving the events of two or more activities, or capable of distributing the events of an interleaved sequence to the respective activities.
multiprogramming. (1) Pertaining to the concurrent execution of two or more computer programs by a computer. (2) A mode of operation that provides for the interleaved execution of two or ~ more computer programs by a single processor.
n. Prefix nano; 0.000,000,001.
NAND. A logic operator having the property that if P is a statement, Q is a statement, R is a statement,..., then the NAND of P, Q ,R,... is true if at least one statement is false, false if all statements are true.
NAND gate. A gate in which the output is 0 only if all inputs are 1.
nano (n). Prefix 0.000,000,001.
nanosecond (ns). 0.000,000,001 second.
~ negative true. Synonym for active low.
negative-going edge. The edge of a pulse or signal changing in a negative direction. Synonymous with falling edge.
Glossary-23
non-retum-to-zero change-on-ones recording (NRZI). A transmission encoding method in which the data terminal equipment changes the signal to the opposite state to send a binary 1 and leaves it in the same state to send a binary O.
non-retum-to-zero (inverted) recording (NRZI). Deprecated term ~ for non-return-to-zero change-on-ones recording.
NOR. A logic operator having the property that if P is a statement, Q is a statement, R is a statement, ... , then the NOR of P, Q, R, ... is true if all statements are false, false if at least one statement is true.
NOR gate. A gate in which the output is 0 only if at least one input is 1.
NOT. A logical operator having the property that if P is a statement, then the NOT of P is true if P is false, false if P is true.
NRZI. Non-return-to-zero change-on-ones recording.
ns. Nanosecond; 0.000,000,001 second.
NUL. The null character.
null character (NUL). A control character that is used to accomplish media-fill or time-fill, and that may be inserted into or removed from, a sequence of characters without affecting the meaning of the sequence; however, the control of the equipment or the format may be affected by this character.
odd-even check. Synonym for parity check.
offline. Pertaining to the operation of a functional unit without the continual control of a computer.
one-shot. A circuit that delivers one output pulse of desired duration for each input (trigger) pulse.
open circuit. (1) A discontinuous circuit; that is, one that is broken at one or more points and, consequently, cannot conduct current. Contrast with closed circuit. (2) Pertaining to a no-load condition; for example, the open-circuit voltage of a power supply.
Glossary-24
open collector. A switching transistor without an internal connection between its collector and the voltage supply. A connection from the collector to the voltage supply is made through an external (pull-up) resistor.
operand. (1) An entity to which an operation is applied. (2) That which is operated upon. An operand is usually identified by an address part of an instruction.
operating system. Software that controls the execution of programs; an operating system may provide services such as resource allocation, scheduling, input/output control, and data management.
OR. A logic operator having the property that if P is a statement, Q is a statement, R is a statement,..., then the OR of P, Q, R,.. .is true if at least one statement is true, false if all statements are false.
OR gate. A gate in which the output is 1 only if at least one input is 1.
~, output. Pertaining to a device, process, or channel involved in an output process, or to the data or states involved in an output process.
output process. (1) The process that consists of the delivery of data from a data processing system, or from any part of it. (2) The return of information from a data processing system to an end user, including the translation of data from a machine language to a language that the end user can understand.
overcurrent. A current of higher than specified strength.
overflow indicator. (1) An indicator that signifies when the last line on a page has been printed or passed. (2) An indicator that is set on if the result of an arithmetic operation exceeds the capacity of the accumulator.
overrun. Loss of data because a receiving device is unable to accept data at the rate it is transmitted.
overvoltage. A voltage of higher than specified value.
Glossary-25
parallel. (1) Pertaining to the concurrent or simultaneous operation of two or more devices, or to the concurrent performance of two or more activities. (2) Pertaining to the concurrent or simultaneous occurrence of two or more related activities in multiple devices or channels. (3) Pertaining to the simultaneity of two or more processes. (4) Pertaining to the simultaneous processing of the individual parts of a whole, such as the bits of a character and the characters of a word, using separate facilities for the various parts. (5) Contrast with serial.
parameter. (1) A variable that is given a constant value for a specified application and that may denote the application. (2) A name in a procedure that is used to refer to an argument passed to that procedure.
parity bit. A binary digit appended to a group of binary digits to make the sum of all the digits either always odd (odd parity) or always even (even parity).
parity check. (1) A redundancy check that uses a parity bit. (2) Synonymous with odd-even check.
PEL. Picture element.
personal computer. A small home or business computer that has a processor and keyboard and that can be connected to a television or some other monitor. An optional printer is usually available.
phototransistor. A transistor whose switching action is controlled by light shining on it.
picture element (PEL). The smallest displayable unit on a display.
polling. (1) Interrogation of devices for purposes such as to avoid contention, to determine operational status, or to determine readiness to send or receive data. (2) The process whereby stations are invited, one at a time, to transmit.
port. An access point for data entry or exit.
positive true. Synonym for active high.
Glossary-26
positive-going edge. The edge of a pulse or signal changing in a positive direction. Synonymous with rising edge.
potentiometer. A variable resistor with three terminals, one at each end and one on a slider (wiper).
power supply. A device that produces the power needed to operate electronic equipment.
printed circuit. A pattern of conductors (corresponding to the wiring of an electronic circuit) formed on a board of insulating material.
printed-circuit board. A usually copper-clad plastic board used to make a printed circuit.
priority. A rank assigned to a task that determines its precedence in receiving system resources.
processing program. A program that performs such functions as compiling, assembling, or translating for a particular programming language.
processing unit. A functional unit that consists of one or more processors and all or part of internal storage.
processor. (1) In a computer, a functional unit that interprets and executes instructions. (2) A functional unit, a part of another unit such as a terminal or a processing unit, that interprets and executes instructions. (3) Deprecated term for processing program. (4) See microprocessor.
program. ( 1) A series of actions designed to achieve a certain result. (2) A series of instructions telling the computer how to handle a problem or task. (3) To design, write, and test computer programs.
programmable read-only memory (PROM). A read-only memory ".-....... that can be programmed by the user.
programming language. (1) An artificial language established for expressing computer programs. (2) A set of characters and rules with meanings assigned prior to their use, for writing computer programs.
Glossary-27
programming system. One or more programming languages and the necessary software for using these languages with particular automatic data-processing equipment.
PROM. Programmable read-only memory.
propagation delay. (1) The time necessary for a signal to travel from one point on a circuit to another. (2) The time delay between a signal change at an input and the corresponding change at an output.
protocol. (1) A specification for the format and relative timing of information exchanged between communicating parties. (2) The set of rules governing the operation of functional units of a communication system that must be followed if communication is to be achieved.
pulse. A variation in the value of a quantity, short in relation to the time schedule of interest, the final value being the same as the initial value.
radio frequency (RF). An ac frequency that is higher than the highest audio frequency. So called because of the application to radio communication.
radix. (1) In a radix numeration system, the positive integer by which the weight of the digit place is multiplied to obtain the weight of the digit place with the next higher weight; for example, in the decimal numeration system the radix of each digit place is 10. (2) Another term for base.
radix numeration system. A positional representation system in which the ratio of the weight of anyone digit place to the weight of the digit place with the next lower weight is a positive integer (the radix). The permissible values of the character in any digit place range from 0 to one less than the radix.
RAM. Random access memory. Read/write memory.
random access memory (RAM). Read/write memory.
RAS. In the IBM Personal Computer, row address strobe.
Glossary-2S
raster. In computer graphics, a predetermined pattern of lines that provides uniform coverage of a display space.
read. To acquire or interpret data from a storage device, from a data medium, or from another source.
read-only memory (ROM). A storage device whose contents cannot be modified. The memory is retained when power is removed.
read/write memory. A storage device whose contents can be modified. Also called RAM.
recoverable error. An error condition that allows continued execution of a program.
red-green-blue-intensity (RGBI). The description of a direct-drive color monitor that accepts input signals of red, green, blue, and intensity.
redundancy check. A check that depends on extra characters attached to data for the detection of errors. See cyclic redundancy ~ check.
register. (1) A storage device, having a specified storage capacity such as a bit, a byte, or a computer word, and usually intended for a special purpose. (2) A storage device in which specific data is stored.
retry. To resend the current block of data (from the last EOB or ETB) a prescribed number of times, or until it is entered correctly or accepted.
reverse video. A form of highlighting a character, field, or cursor by reversing the color of the character, field, or cursor with its background; for example, changing a red character on a black background to a black character on a red background.
~ RF. Radio frequency.
RF modulator. The device used to convert the composite video signal to the antenna level input of a home TV.
RGBI. Red-green-blue-intensity.
Glossary-29
rising edge. Synonym for positive-going edge.
ROM. Read-only memory.
ROM/BIOS. The ROM resident basic input/output system,
which provides the level control of the major I/O devices in the
~
computer system.
row address strobe (RAS). A signal that latches the row address in a memory chip.
RS-232C. A standard by the EIA for communication between computers and external equipment.
RTS. Request to send. Associated with modem control.
run. A single continuous performance of a computer program or routine.
saturation. In computer graphics, the purity of a particular hue. A color is said to be saturated when at least one primary color (red, blue, or green) is completely absent.
scaling. In computer graphics, enlarging or reducing all or part of a display image by multiplying the coordinates of the image by a constant value.
schematic. The representation, usually in a drawing or diagram form, of a logical or physical structure.
Schottky TTL. A version (S series) of TTL with faster switching speed, but requiring more power. See also transistor-transistor logic and low power Schottky TTL.
SDL. Shielded Data Link
SDLC. Synchronous Data Link Control.
sector. That part of a track or band on a magnetic drum, a magnetic disk, or a disk pack that can be accessed by the magnetic heads in the course of a predetermined rotational displacement of the particular device.
SERDES. Serializer/ deserializer.
Glossary - 30
serial. (1) Pertaining to the sequential performance of two or more activities in a single device. In English, the modifiers serial and parallel usually refer to devices, as opposed to sequential and consecutive, which refer to processes. (2) Pertaining to the sequential or consecutive occurrence of two or more related activities in a single device or channel. (3) Pertaining to the sequential processing of the individual parts of a whole, such as the bits of a character or the characters of a word, using the same facilities for successive parts. (4) Contrast with parallel.
serializer/deserializer (SERDES). A device that serializes output from, and deserializes input to, a business machine.
setup. (1) In a computer that consists of an assembly of individual computing units, the arrangement of interconnections between the units, and the adjustments needed for the computer to operate. (2) The preparation of a computing system to perform a job or job step. Setup is usually performed by an operator and often involves performing routine functions, such as mounting tape reels. (3) The preparation of the system for normal operation.
.~ short circuit. A low-resistance path through which current flows, rather than through a component or circuit.
signal. A variation of a physical quantity, used to convey data.
sink. A device or circuit into which current drains.
software. (1) Computer programs, procedures, and rules concerned with the operation of a data processing system. (2) Contrast with hardware.
source. The origin of a signal or electrical energy.
square wave. An alternating or pulsating current or voltage whose waveshape is square.
square wave generator. A signal generator delivering an output signal having a square waveform.
SSe Start-stop.
Glossary-31
start bit. (1) A signal to a receiving mechanism to get ready to receive data or perform a function. (2) In a start-stop system, a signal preceding a character or block that prepares the receiving device for the reception of the code elements.
start-of-text (8TX). A transmission control character that precedes a text and may be used to terminate the message heading.
start-stop system. A data transmission system in which each character is preceded by a start bit and is followed by a stop bit.
start-stop (88) transmission. (1) Asynchronous transmission such that a group of signals representing a character is preceded by a start bit and followed by a stop bit. (2) Asynchronous transmission in which a group of bits is preceded by a start bit that prepares the receiving mechanism for the reception and registration of a character and is followed by at least one stop bit that enables the receiving mechanism to come to an idle condition pending the reception of the next character.
static memory. RAM using flip-flops as the memory elements. Data is retained as long as power is applied to the flip-flops. Contrast with dynamic memory.
stop bit. (1) A signal to a receiving mechanism to wait for the next signal. (2) In a start-stop system, a signal following a character or block that prepares the receiving device for the reception of a subsequent character or block.
storage. (1) A storage device. (2) A device, or part of a device, that can retain data. (3) The retention of data in a storage device. (4) The placement of data into a storage device.
strobe. An instrument that emits adjustable-rate flashes of light. Used to measure the speed of rotating or vibrating objects.
8TX. Start-of-text.
symbol. (1) A conventional representation of a concept. (2) A representation of something by reason of relationship, association, or convention.
Glossary-32
synchronization. The process of adjusting the corresponding significant instants of two signals to obtain the desired phase relationship between these instants.
Synchronous Data Link Control (SDLC). A protocol for management of data transfer over a data link.
synchronous transmission. (1) Data transmission in which the time of occurrence of each signal representing a bit is related to a fixed time frame. (2) Data transmission in which the sending and receiving devices are operating continuously at substantially the same frequency and are maintained, by means of correction, in a desired phase relationship.
syntax. (1) The relationship among characters or groups of characters, independent of their meanings or the manner of their interpretation and use. (2) The structure of expressions in a language. (3) The rules governing the structure of a language. (4) The relationships among symbols.
text. In ASCII and data communication, a sequence of characters treated as an entity if preceded and terminated by one ~ STX and one ETX transmission control character, respectively.
time-out. (1) A parameter related to an enforced event designed to occur at the conclusion of a predetermined elapsed time. A time-out condition can be cancelled by the receipt of an appropriate time-out cancellation signal. (2) A time interval allotted for certain operations to occur; for example, response to polling or addressing before system operation is interrupted and must be restarted.
track. (1) The path or one of the set of paths, parallel to the reference edge on a data medium, associated with a single reading or writing component as the data medium moves past the component. (2) The portion of a moving data medium such as a drum, or disk, that is accessible to a given reading head position.
transistor-transistor logic (TTL). A popular logic circuit family that uses multiple-emitter transistors.
translate. To transform data from one language to another.
Glossary-33
transmission. (1) The sending of data from one place for reception elsewhere. (2) In ASCII and data communication, a series of characters including headings and text. (3) The dispatching of a signal, message, or other form of intelligence by wire, radio, telephone, or other means. (4) One or more blocks or messages. For BSC and start-stop devices, a transmission is terminated by an EOT character. (5) Synonymous with data transmission.
TIL. Transistor-transistor logic.
typematic k~y. A keyboard key that repeats its function when held pressed.
v. Volt.
vector. In computer graphics, a directed line segment.
video. Computer data or graphics displayed on a cathode ray tube, monitor, or display.
view point. In computer graphics, the origin from which angles and scales are used to map virtual space into display space.
viewing reference point. In computer graphics, a point in the modeling coordinate space that is a defined distance from the view point.
viewing transformation. Operations on the coordinates of an object (usually matrix multiplications) that cause the view of the object to be rotated about any axis, translated (moved without rotating), and/or scaled (changed in size along any or all dimensions). Viewing transformation differs from modeling transformation in that perspective is considered. See also modeling transformation.
viewplane. The visible plane of a CRT display screen that completely contains a defined window.
viewport. In computer graphics, a predefined part of the CRT display space.
volt. The basic practical unit of electric pressure. The potential that causes electrons to flow through a circuit.
Glossary-34
W. Watt. watt. The practical unit of electric power. window. (1) A predefined part of the virtual space. (2) The visible area of a viewplane. word. ( 1) A character string or a bit string considered as an entity. (2) See computer word. write. To make a permanent or transient recording of data in a storage device or on a data medium. write precompensation. The varying of the timing of the head current from the outer tracks to the inner tracks of the diskette to keep a constant 'write' signal. yon plane. In computer graphics, a plane that is perpendicular to the line joining the viewing reference point and the view point, and that lies beyond the viewing reference point. Any part of an object beyond the yon plane is not seen. See also hither plane.
Glossary-35
Notes:
Glossary-36
Bibliography
Intel Corporation. The 8086 Family User's Manual. This manual introduces the 8086 family of microcomputing components and serves as a reference in system design and implementation. Intel Corporation. 8086/8087/8088 Macro Assembly Reference Manual for 8088/8085 Based Development System. This manual describes the 8086/8087/8088 Macro Assembly Language and is intended for persons who are familiar with assembly language. Intel Corporation. Component Data Catalog. This book describes Intel components and their technical specifications. Motorola, Inc. The Complete Microcomputer Data Libary. This book describes Motorola components and their technical specifications. National Semiconductor Corporation. 250 Asynchronous Communications Element. This book documents physical and operating characteristics of the INS 8250.
Bibliography-l
Notes:
Bibliography- 2
Index
AAA 6-10,6-11
bandwidth formula 1-14
AAD 6-13
specifications I/O
AAM 6-12
channel 1-15
AAS 6-12
BASIC
adapter card with ROM 5-10
DEF SEG 5-8
ADC 6-10
reserved interrupt 5-7,
ADD 6-10
5-8
address
basic assurance test 4-25
bits 0 to 19
BASIC reserved
(AO-AI9) 1-20
interrupts 5-7
enable (AEN), I/O
BAT (basic assurance
channel 1-20
test) 4-25
latch enable (ALE), I/O
BAT Completion Code
channel 1-20
command 4-26
map, I/O channel 1-25
BAT Failure Code
map, I/O planar 1-24
command 4-26
AEN (address enable) 1-20
binary integers
ALE (address latch enable),
(coprocessor) 2-3,2-4
I/O channel 1-20
BIOS
alternate key 4-41
parameter passing 5-4
AND 6-14
quick reference 5-11,
arithmetic instructions 6-10,
5-111
6-26
software interrupt 5-5
ASCII characters 7-3
system ROM 5-11,5-111
ASCII, extended 4-34
use of 5-3
bit map, I/O 8255A 1-27
block diagram
system timer 1-10
block diagram
(coprocessor) 2-6
break 4-11
break code 4-24
break key 4-42
buffer, keyboard 4-24
Index-l
component diagram, system
board 1-19
connector specifications 4-19
cabling 4-23
CALL 6-16
caps lock key 4-10, 4-41
card specifications 1-31
CBW 6-13
CH CK, negative (-channel
check), I/O channel 1-22
channel check, negative (-CH
CK), I/O channel 1-22
channel, II0
pin assignments 1-17
character codes 4-6,4-34
character codes
(keyboard) 4-8
connectors
J-l through J-8 1-16
keyboard 1-33
power supply 1-32
speaker 1-33
system board 1-32
connectors (power supply) 3-6, 3-9
constants instructions 6-28
control key 4-40
control transfer
instructions 6-16
Ctrl state 4-38
CWD 6-13
characters 7-3
CLC 6-23
CLD 6-23
CLI 6-23
CLK, I/O channel 1-21
clock (CLK), I/O
DAS 6-12
channel 1-21
data
clock and data signals 4-32
bits 0 to 7 (DO-D7) 1-21
data output 4-33
flow, system board
data stream 4-33
CMC 6-23
diagram 1-6
data output 4-33
CMP 6-12
CMPS 6-15
data stream 4-33
data transfer
codes
instructions 6-7, 6-24
character 4-34
DEC 6-11
extended 4-38
decimal integers
commands from the system
(coprocessor) 2-3,2-4
Reset 4-26
delay, typematic 4-24
commands to the system
BAT (basic assurance test)
description 4-22
buffer 4-24
Completion Code 4-26
BAT Failure 4-26
Key Detection Error 4-27
cabling 4-23
key-code scanning 4-23
keys 4-24
Overrun 4-27
sequencing key-code
comparison instructions
6-25
scanning 4- 23
description I/O channel
1-20
Index-2
diagram, system board 1-19
diagrams
logic, 101/102-key
keyboard 4-52
logic, 83-key
keyboard 4-21
logics,256/640K 1-46
logics,64/256K 1-34
DIV 6-12
DMA request 1 to 3
(DRQ1-DRQ3) 1-21
DOS
keyboard function 5-7
encoding, keyboard 4-33
ESC 6-23
extended ASCII 4-6,4-34 extended codes 4-9,4-38
FABS 6-28
FADD 6-26
FCHS 6-28
FCLEX 6-30
FCOM 6-25
FCOMP 6-26
FCOMPP 6-26
FDECSTP 6-30
FDISI 6-29
FDIV 6-27
FENI 6-29
FFREE 6-30
FIFO 4-24
FINCSTP 6-30
FINIT 6-29
FLD 6-24
FLDCW 6-29
FLDENV 6-30
FLDLG2 6-29
FLDLN2 6-29
FLDL2T 6-29
FLDP1 6-29
FLDZ 6-28
FLD1 6-28
FMUL 6-27
FNOP 6-30
FPATAN 6-28
FPREM 6-27
FPTAN 6-28
French keyboard 4-13,4-45
FRNDINT 6-27
FRSTOR 6-30
FSAVE 6-30
FSCALE 6-27
FSQRT 6-27
FST 6-25
FSTCW 6-29
FSTENV 6-30
FSTP 6-25
FSTSW 6-29
FSUB 6-26
FTST 6-26
FWAIT 6-30
FXAM 6-26
FXCH 6-25
FXTRACT 6-27
FYL2X 6-28
FYL2XP1 6-28
F2XM1 6-28
generator, refresh
request 1-10
German keyboard 4-14,4-46
Index-3
arithmetic 6-10,6-26
comparison 6-25
constants 6-28
HLT 6-23
control transfer 6-16
data transfer 6-7, 6-24
logic 6-13
rotate 6-13
shift 6-13
string manipulation 6-15
I/O channel
INT 6-22
address map, channel 1-25
Intel 8048 4-3
Intel 8088 microprocessor,
address map, planar 1-24
ALE (address latch
enable) 1-20
arithmetic 6-8, 6-19
comparison 6-19
conditional transfer
bit map 8255A 1-27
CH CK (-I/O Channel
operations 6-15
constants 6-21
Check) 1-22
CH RDY (I/O Channel
control transfer 6-12
data transfer 6-6, 6-17
Ready), I/O
instruction set index 6-27
channel 1-22
check (-CH CK) 1-22
instruction set
matrix 6-25
CLK 1-21
instuction set
description 1-20
extensions 6-17
I/O channel 1-15
oscillator (OSC) 1-23
logic 6-10
memory segmentation
pin assignments 1-17
read command
model 6-5
operand summary 6-4
(-lOR) 1-22
processor control 6-16,
Reset Drive (RESET
6-22
DRV) 1-23
register model 6-3
Terminal Count
second instruction byte
(T/C) 1-23
Write Command
summary 6-4
string manipulation 6-11
(-lOW) 1-22
transcendental 6-21
I/O channel connectors 1-17
IDIV 6-12
use of segment
override 6-5
IMUL 6-12
interrupt request 2 to 7
IN 6-8
INC 6-10
instructions
(lRQ2-IRQ7) 1-22
INTO 6-22
IRET 6-22
Italian keyboard 4-15,4-47
Index-4
JB/JNAE 6-17
JBE/JNA 6-17
/"'""'.. JCXZ 6-19
JE/JZ 6-17
JL/JNGE 6-17
JLE/JNG 6-17
JMP 6-16
JNB/JAE 6-18
JNBE/JA 6-18
JNE/JNZ 6-18
JNL/JGE 6-18
JNLE/JG 6-18
JNO 6-18
JNP/JPO 6-18
JNS 6-19
JO 6-18
JP/JPE 6-18
JS 6-18
/"'""'..
key-code scanning 4-23
Key Detection Error
command 4-27
keyboard 4-3
connector 1-33,4-19
encoding 4-33
interface 4-5
layout 4-12, 4-35
power-on self test 4-4
routine 4-43
keyboard buffer 4-24
keyboard data output 4-33
keyboard extended codes
alt 4-10
alternate 4-41
break 4-11, 4-42
caps lock 4-10,4-41
combinations 4-41
ctrl 4-9, 4-40
number lock 4-41
pause 4-11,4-42
print screen 4-11, 4-42
scroll lock 4-10, 4-41
shift 4-9, 4-40
system request 4-42
system reset 4-11
keyboard layouts
French 4-13,4-45
German 4-14, 4-46
Italian 4-15, 4-47
Spanish 4-16, 4-48
UK English 4-17, 4-49
US English 4-18,4-50
keyboard scan 4-3
keyboard scan codes 4-6
4-28
'
keyboard, French 4-13,4-45
keyboard, German 4-14
4-46
'
keyboard, Italian 4-15, 4-47
keyboard, Spanish 4-16, 4-48
keyboard, UK English 4-17,
4-49
keyboard, US English 4-18,
4-50
keys 4-24
keys, typematic 4-4,4-24
LAHF 6-9
layout, keyboard 4-35
layouts
French 4-13,4-45
German 4-14, 4-46
Italian 4-15, 4-47
Spanish 4-16, 4-48
UK English 4-17, 4-49
Index-5
US English 4-18, 4-50
LDS 6-9
LEA 6-9
LES 6-9
line protocol 4-25
LOCK 6-23
LODS 6-15
logic diagrams 4-52
logic diagrams, system board,
256/640K 1-46
logic diagrams, system board,
64/256K 1-34
logic instructions 6-13
LOOP 6-19
LOOPNZ/LOOPNE 6-19
LOOPZ/LOOPE 6-19
-MEMW (memory write command) 1-23
modules, RAM 1-12
modules,
ROM/EPROM 1-13
MOV 6-7
MOVS 6-15
MUL 6-12
NEG 6-11
NMI (coprocessor) 2-5
NOP 6-23
NOT 6-13
Num Lock key 4-9,4-11
Num Lock state 4-38
number lock key 4-41
make code 4-4,4-24
make/break 4-24
math coprocessor
binary integers 2-3, 2-4
block diagram 2-6
control word 2-5
decimal integers 2-3, 2-4
hardware interface 2-4
NMI 2-5
QSO 2-4
QSl 2-4
real numbers 2-3,2-4
memory locations
reserved 5-8
memory map
BIOS 5-8
memory map, system 1-8
memory read command
(-MEMR) 1-23
memory write command
(-MEMW) 1-23
-MEMR (memory read
command) 1-23
OR 6-14
OSC (oscillator), I/O
channel 1-23
oscillator (OSC), I/O
channel 1-23
OUT 6-8
output, keyboard 4-33
Overrun command 4-27
parameter passing (ROM
BIOS) 5-4
software interrupt
listing 5-5
pause 4-11
Index-6
pause key 4-42
POP 6-8
POPF 6-9
POR (power-on reset) 4-25
power good signal 3-5,3-8
power-on reset 4-25
power-on routine 4-25
basic assurance test 4-25
BAT (basic assurance
QSO (coprocessor) 2-4
QS 1 (coprocessor) 2-4
quick reference charts 7-14
quick reference, character
set 7-14
test) 4-25
POR (power-on
reset) 4-25
power-on reset 4-25
power-on self test 4-4
power requirements 4-51
power supply
connectors 1-32
power supply (system) 3-3
connectors 3-6, 3-9
input requirements 3-4,
3-7
outputs 3-4, 3-8
RAM modules 1-12
RAM subsystem 1-12
rate, typematic 4-24
RCL 6-14
RCR 6-14
read command I/O
channel 1-22
read memory command
(-MEMR) 1-23
overvoltage/overcurrent
protection 3-5
pin assignments 3-6, 3-9
power good signal 3-5,
3-8
PPI 1-26
print screen key 4-11, 4-42
priorities, shift key 4-41
processor control, 8087 6-29
Programmable Peripheral
Interface 1-26
protocol 4-25
PUSH 6-7
PUSHF 6-9
ready (RDY), I/O
channel 1-22
real numbers
(coprocessor) 2-3, 2-4
refresh request
generator 1-10
REP 6-15
request interrupt 2 to 7
(lRQ2-IRQ7) 1-22
reserved interrupts
BASIC and DOS 5-7
Reset command 4-26
RESET DRV, I/O
channel 1-23
reset, power-on 4-25
reset, system 4-42
RET 6-17
ROL 6-13
ROM scan codes 4-33
ROM subsystem 1-13
Index-7
ROM/EPROM
-MEMR 1-23
modules 1-13
-MEMW 1-23
ROR 6-13
OSC 1-23
rotate instructions 6-13
RESET DRV 1-23
routine, keyboard 4-6, 4-43
T/C 1-23
signals, clock and data 4-32
software interrupt listing
(8088) 5-5
Spanish keyboard 4-16, 4-48
speaker circuit 1-26
SAHF 6-9
speaker connector 1-33
SAR 6-13
speaker drive system 1-26
SBB 6-11
speaker tone generation 1-10
scan code tables 4-28
specifications 4-51
scan codes 4-28
power requirements 4-51
scan codes, ROM 4-33
size 4-51
scanning, key-code
weight 4-51
sequencing 4-23
states
SCAS 6-15
Ctrl 4-9, 4-38
scroll lock 4-10
Num Lock 4-9, 4-38
scroll lock key 4-10, 4-41
Shift 4-9, 4-38, 4-40
sequencing key-code
STC 6-23
scanning 4-23
STD 6-23
shift 4-8
STI 6-23
shift instructions 6-13
STOS 6-16
shift key 4-9,4-40
stream, data 4-33
shift key priorities 4-10, 4-41
string manipulation
shift states 4-9, 4-40
instructions 6-15
SHL/SAL 6-13
SUB 6-11
SHR 6-13
subsystem, RAM 1-12
signals (I/O)
subsystem, ROM 1-13
AEN 1-20
switches
ALE 1-20
dual in-line package (DIP)
AO-AI9 1-20
switch 1-3
CLK 1-21
I/O Bit Map 1-27
-DACKO-DACK3 1-21
system board 1-19
DRQI-DRQ3 1-21
system board
DO-D7 1-21
data flow diagrams 1-6
-I/O CH CK 1-22
diagram 1-19
I/O CH RDY 1-22
logic diagrams,
-lOR 1-22
256/640K 1-46
-lOW 1-22
logic diagrams,
IRQ2-IRQ7 1-22
64/256K 1-34
Index-8
system board
connectors 1-32
system board,
256/640K 1-13
system board,
64/256K 1-12,1-13
system clock (CLK), I/O
channel 1-21
system memory map 1-8
system request key 4-42
system reset 4-11,4-42
system ROM BIOS 5-11,
5-111
system timer block
diagram 1-10
system timers 1-10
vectors with special
meanings 5-5
WAIT 6-23
write command (-lOW), I/O
channel 1-22
write memory command
(-MEMW) 1-23
terminal count (T/C), I/O ~ channel 1-23
TEST 6-14
timer/counters 1-10
timers, system 1-10
tone generation,
speaker 1-10
typematic delay 4-24
typematic keys 4-4,4-24
typematic rate 4-24
XCHG 6-8
XLAT 6-9
XOR 6-15
I Numerics I
8088, (see also Intel 8088
microprocessor) 1-4
8254-2 1-10
8255A bit map 1-27
~
UK English keyboard 4-17,
4-49
US English keyboard 4-18,
4-50
Index-9
- --_---- -_----- ---_---------0-----
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