VME172FXA

VME172FXA VME172FXA

User Manual: VME172FXA

Open the PDF directly: View PDF .
Page Count: 191

Download
Open PDF In Browser	View PDF

MVME172FX
400/500-Series
VME Embedded Controller
Installation and Use
VME172FXA/IH3

Notice
While reasonable efforts have been made to assure the accuracy of this document,
Motorola, Inc. assumes no liability resulting from any omissions in this document, or from
the use of the information obtained therein. Motorola reserves the right to revise this
document and to make changes from time to time in the content hereof without obligation
of Motorola to notify any person of such revision or changes.
No part of this material may be reproduced or copied in any tangible medium, or stored in
a retrieval system, or transmitted in any form, or by any means, radio, electronic,
mechanical, photocopying, recording or facsimile, or otherwise, without the prior written
permission of Motorola, Inc.
It is possible that this publication may contain reference to, or information about Motorola
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 Motorola
intends to announce such Motorola products, programming, or services in your country.

Restricted Rights Legend
If the documentation contained herein is supplied, directly or indirectly, to the U.S.
Government, the following notice shall apply unless otherwise agreed to in writing by
Motorola, Inc.
Use, duplication, or disclosure by the Government is subject to restrictions as set forth in
subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at
DFARS 252.227-7013.
Motorola, Inc.
Computer Group
2900 South Diablo Way
Tempe, Arizona 85282-9602

Preface
This document provides general information and basic installation instructions for the
400/500-Series MVME172FX VME Embedded Controller (which is available in the
versions listed below). The MVME172FX VME Embedded Controller will be referred to
as MVME172 throughout this document.
Assembly Item

Board Description

MVME172-410

4MB DRAM, 64MHz MC68LC060

MVME172-411

4MB DRAM, 64MHz MC68LC060 and SCSI Interface

MVME172-412

4MB DRAM, 64MHz MC68LC060 and Ethernet Interface

MVME172-413

4MB DRAM, 64MHz MC68LC060, SCSI & Ethernet Interfaces

MVME172-430

8MB DRAM, 64 MHz MC68LC060

MVME172-431

8MB DRAM, 64MHz MC68LC060 and SCSI Interface

MVME172-432

8MB DRAM, 64MHz MC68LC060 and Ethernet Interface

MVME172-433

8MB DRAM, 64MHz MC68LC060, SCSI & Ethernet interface

MVME172-450

16MB DRAM, 64MHz MC68LC060

MVME172-451

16MB DRAM, 64MHz MC68LC060 and SCSI interface

MVME172-452

16MB DRAM, 64MHz MC68LC060 and Ethernet interface

MVME172-453

16MB DRAM, 64MHz MC68LC060, SCSI and Ethernet interface

MVME172-510

4MB DRAM, 60MHz MC68060

MVME172-511

4MB DRAM, 60MHz MC68060 and SCSI interface

MVME172-512

4MB DRAM, 60MHz MC68060 and Ethernet interface

MVME172-513

4MB DRAM, 60MHz MC68060, SCSI & Ethernet interfaces

MVME172-520

8MB DRAM, 60MHz MC68060

MVME172-521

8MB DRAM, 60MHz MC68060 and SCSI interface

MVME172-522

8MB DRAM, 60MHz MC68060 and Ethernet interface

MVME172-523

8MB DRAM, 60MHz MC68060, SCSI and Ethernet interfaces

MVME172-530

16MB DRAM, 60MHz MC68060

MVME172-531

16MB DRAM, 60MHz MC68060 and SCSI interface

MVME172-532

16MB DRAM, 60MHz MC68060 and Ethernet interface

MVME172-533

16MB DRAM, 60MHz MC68060, SCSI & Ethernet interfaces

This manual is intended for anyone who wants to design OEM systems, supply additional
capability to an existing compatible system, or work in a lab environment for experimental
purposes.
Anyone using this manual should have a basic knowledge of computers and digital logic.
Companion publications are listed in Chapter 1.

Safety Summary
Safety Depends On You
The following general safety precautions must be observed during all phases of operation, service, and repair of this
equipment. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the equipment. Motorola, Inc. assumes no liability for the
customer’s failure to comply with these requirements.
The safety precautions listed below represent warnings of certain dangers of which Motorola is aware. You, as the user
of the product, should follow these warnings and all other safety precautions necessary for the safe operation of the
equipment in your operating environment.

Ground the Instrument.
To minimize shock hazard, the equipment chassis and enclosure must be connected to an electrical ground. The
equipment is supplied with a three-conductor AC power cable. The power cable must be plugged into an approved
three-contact electrical outlet. The power jack and mating plug of the power cable meet International Electrotechnical
Commission (IEC) safety standards.

Do Not Operate in an Explosive Atmosphere.
Do not operate the equipment in the presence of flammable gases or fumes. Operation of any electrical equipment in
such an environment constitutes a definite safety hazard.

Keep Away From Live Circuits.
Operating personnel must not remove equipment covers. Only Factory Authorized Service Personnel or other
qualified maintenance personnel may remove equipment covers for internal subassembly or component replacement
or any internal adjustment. Do not replace components with power cable connected. Under certain conditions,
dangerous voltages may exist even with the power cable removed. To avoid injuries, always disconnect power and
discharge circuits before touching them.

Do Not Service or Adjust Alone.
Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is
present.

Use Caution When Exposing or Handling the CRT.
Breakage of the Cathode-Ray Tube (CRT) causes a high-velocity scattering of glass fragments (implosion). To prevent
CRT implosion, avoid rough handling or jarring of the equipment. Handling of the CRT should be done only by
qualified maintenance personnel using approved safety mask and gloves.

Do Not Substitute Parts or Modify Equipment.
Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized
modification of the equipment. Contact your local Motorola representative for service and repair to ensure that safety
features are maintained.

Dangerous Procedure Warnings.
Warnings, such as the example below, precede potentially dangerous procedures throughout this manual. Instructions
contained in the warnings must be followed. You should also employ all other safety precautions which you deem
necessary for the operation of the equipment in your operating environment.

!
WARNING

Dangerous voltages, capable of causing death, are present in
this equipment. Use extreme caution when handling, testing,
and adjusting.

All Motorola PWBs (printed wiring boards) are manufactured by UL-recognized
manufacturers, with a flammability rating of 94V-0.

!
WARNING

This equipment generates, uses, and can radiate electromagnetic energy. It may cause or be susceptible to electromagnetic interference (EMI) if not installed and used in a
cabinet with adequate EMI protection.

European Notice: Board products with the CE marking comply with the EMC
Directive (89/336/EEC). Compliance with this directive implies conformity to
the following European Norms:
EN55022 (CISPR 22) Radio Frequency Interference
EN50082-1 (IEC801-2, IEC801-3, IEC801-4) Electromagnetic Immunity
The product also fulfills EN60950 (product safety) which is essentially the
requirement for the Low Voltage Directive (73/23/EEC).
This board product was tested in a representative system to show compliance
with the above mentioned requirements. A proper installation in a CE-marked
system will maintain the required EMC/safety performance.

The computer programs stored in the Read Only Memory of this device contain material
copyrighted by Motorola Inc., 1995, and may be used only under a license such as those
contained in Motorola’s software licenses.
Motorola® and the Motorola symbol are registered trademarks of Motorola, Inc.
All other products mentioned in this document are trademarks or registered trademarks of
their respective holders.
©Copyright Motorola 1998
All Rights Reserved
Printed in the United States of America
June 1998

Contents
CHAPTER 1

Board Level Hardware Description

Introduction................................................................................................................1-1
Overview.............................................................................................................1-1
Related Documentation.......................................................................................1-3
Other Applicable Motorola Publications ............................................................1-4
Applicable Non-Motorola Publications ..............................................................1-4
MCG Customer Services ...........................................................................................1-6
Requirements ......................................................................................................1-7
Features...............................................................................................................1-7
Specifications......................................................................................................1-9
Cooling Requirements ......................................................................................1-10
Special Considerations for Elevated Temperature Operation ...........................1-10
FCC Compliance...............................................................................................1-12
Manual Terminology.........................................................................................1-12
Block Diagram ..................................................................................................1-14
Functional Description.............................................................................................1-15
Front Panel Switches and Indicators.................................................................1-15
Data Bus Structure ............................................................................................1-16
MC68060 or MC68LC060 MPU......................................................................1-16
MC68xx060 Cache ....................................................................................1-16
No-VMEbus-Interface Option ..........................................................................1-17
Memory Options ...............................................................................................1-17
DRAM Options..........................................................................................1-17
SRAM Options ..........................................................................................1-18
About the Battery.......................................................................................1-19
EPROM and Flash Memory ......................................................................1-21
Battery Backed Up RAM and Clock ................................................................1-22
VMEbus Interface and VMEchip2 ...................................................................1-22
I/O Interfaces ....................................................................................................1-23
Serial Communications Interface ..............................................................1-23
IndustryPack (IP) Interfaces ......................................................................1-26
Optional LAN Ethernet Interface ..............................................................1-27
Optional SCSI Interface.............................................................................1-28
SCSI Termination ......................................................................................1-28
Local Resources................................................................................................1-28
Programmable Tick Timers .......................................................................1-28

vii

Watchdog Timer........................................................................................ 1-28
Software-Programmable Hardware Interrupts .......................................... 1-29
Local Bus Timeout .................................................................................... 1-29
Local Bus Arbiter ............................................................................................. 1-30
Timing Performance ......................................................................................... 1-30
Local Bus to DRAM Cycle Times ............................................................ 1-30
EPROM/Flash Cycle Times ...................................................................... 1-31
SCSI Transfers .......................................................................................... 1-31
LAN DMA Transfers ................................................................................ 1-31
Connectors........................................................................................................ 1-32
Remote Status and Control........................................................................ 1-33
Memory Maps.......................................................................................................... 1-33
Local Bus Memory Map................................................................................... 1-33
Normal Address Range ............................................................................. 1-34
VMEbus Memory Map..................................................................................... 1-38
VMEbus Accesses to the Local Bus ......................................................... 1-38
VMEbus Short I/O Memory Map ............................................................. 1-38
Software Initialization ............................................................................................. 1-39
Multi-MPU Programming Considerations ....................................................... 1-39
Local Reset Operation ...................................................................................... 1-39
CHAPTER 2

Hardware Preparation and Installation

Introduction ............................................................................................................... 2-1
Unpacking Instructions.............................................................................................. 2-1
Hardware Preparation ................................................................................................ 2-2
System Controller Select Header (J1) ................................................................ 2-3
SIMM Selection (J15) ........................................................................................ 2-5
Removal of Existing SIMM ........................................................................ 2-6
Installation of New SIMM .......................................................................... 2-8
Clock Select Header (J16) for Serial Port 1/Console ......................................... 2-9
Clock Select Header (J17) for Serial Port 2 ....................................................... 2-9
SRAM Battery Backup Source Select Header (J22) ........................................ 2-10
IP DMA Snoop Control Header (J2) ................................................................ 2-11
EPROM Size Select Header (J23) .................................................................... 2-12
General Purpose Readable Jumpers Header (J28) ........................................... 2-12
Flash Write Protect Header (J24) ..................................................................... 2-13
IP Bus Clock Header (J14) ............................................................................... 2-14
IP Bus Strobe Select Header (J19) ................................................................... 2-15
Installation Instructions ........................................................................................... 2-16
IP Installation on the MVME172 ..................................................................... 2-16

viii

MVME172 Module Installation........................................................................2-17
System Considerations......................................................................................2-19
CHAPTER 3

Debugger General Information

Overview of M68000 Firmware.................................................................................3-1
Description of 172Bug ...............................................................................................3-1
172Bug Implementation.............................................................................................3-3
Installation and Startup ..............................................................................................3-4
Autoboot ....................................................................................................................3-9
ROMboot..................................................................................................................3-10
Network Boot...........................................................................................................3-10
Restarting the System ..............................................................................................3-11
Reset..................................................................................................................3-12
Abort .................................................................................................................3-13
Break.................................................................................................................3-13
SYSFAIL* Assertion/Negation ........................................................................3-14
MPU Clock Speed Calculation .........................................................................3-14
Memory Requirements.............................................................................................3-15
Disk I/O Support ......................................................................................................3-16
Blocks Versus Sectors.......................................................................................3-16
Device Probe Function......................................................................................3-17
Disk I/O via 172Bug Commands......................................................................3-17
IOI (Input/Output Inquiry).........................................................................3-17
IOP (Physical I/O to Disk).........................................................................3-18
IOT (I/O Teach).........................................................................................3-18
IOC (I/O Control) ......................................................................................3-18
BO (Bootstrap Operating System).............................................................3-18
BH (Bootstrap and Halt)............................................................................3-18
Disk I/O via 172Bug System Calls ...................................................................3-18
Default 172Bug Controller and Device Parameters..........................................3-20
Disk I/O Error Codes ........................................................................................3-20
Network I/O Support................................................................................................3-21
Intel 82596 LAN Coprocessor Ethernet Driver ................................................3-21
UDP/IP Protocol Modules ................................................................................3-21
RARP/ARP Protocol Modules .........................................................................3-22
BOOTP Protocol Module .................................................................................3-22
TFTP Protocol Module .....................................................................................3-22
Network Boot Control Module .........................................................................3-22
Network I/O Error Codes..................................................................................3-23
Multiprocessor Support............................................................................................3-23

Multiprocessor Control Register (MPCR) Method .......................................... 3-23
GCSR Method .................................................................................................. 3-25
Diagnostic Facilities ................................................................................................ 3-26
Manufacturing Test Process..................................................................................... 3-26
CHAPTER 4

Using the 172Bug Debugger

This Chapter Covers .................................................................................................. 4-1
Entering Debugger Command Lines ......................................................................... 4-1
Terminal Input/Output Control........................................................................... 4-1
Debugger Command Syntax............................................................................... 4-3
Syntactic Variables ............................................................................................. 4-3
Expression as a Parameter........................................................................... 4-3
Address as a Parameter ............................................................................... 4-5
Address Formats.......................................................................................... 4-5
Offset Registers ........................................................................................... 4-7
Port Numbers...................................................................................................... 4-9
Entering and Debugging Programs.......................................................................... 4-10
Creating a Program with the Assembler/Disassembler .................................... 4-10
Downloading an S-Record Object File............................................................. 4-10
Read the Program from Disk............................................................................ 4-11
Calling System Utilities from User Programs ......................................................... 4-11
Preserving the Debugger Operating Environment................................................... 4-12
172Bug Vector Table and Workspace............................................................... 4-12
Examples ................................................................................................... 4-13
Hardware Functions ......................................................................................... 4-13
Exception Vectors Used by 172Bug ................................................................. 4-14
Exception Vector Tables ........................................................................... 4-15
Using 172Bug Target Vector Table .......................................................... 4-15
Creating a New Vector Table.................................................................... 4-16
Floating Point Support............................................................................................. 4-18
Single Precision Real........................................................................................ 4-19
Double Precision Real ...................................................................................... 4-20
Scientific Notation............................................................................................ 4-21
The 172Bug Debugger Command Set..................................................................... 4-22
APPENDIX A

Configure and Environment Commands

Configure Board Information Block......................................................................... A-1
Set Environment to Bug/Operating System.............................................................. A-3
Configuring the IndustryPacks ........................................................................ A-16

APPENDIX B

Serial Interconnections

Introduction............................................................................................................... B-1
EIA-232-D Connections ........................................................................................... B-1
Interface Characteristics .................................................................................... B-4
EIA-530 Connections................................................................................................ B-5
Interface Characteristics .................................................................................... B-7
EIA-485/EIA-422 Connections ................................................................................ B-8
Interface Characteristics .................................................................................. B-10
Proper Grounding.................................................................................................... B-11
APPENDIX C

IndustryPack Interconnections

Introduction............................................................................................................... C-1
APPENDIX D

Disk/Tape Controller Data

Controller Modules Supported..................................................................................D-1
Default Configurations..............................................................................................D-2
IOT Command Parameters........................................................................................D-5
APPENDIX E

Network Controller Data

Network Controller Modules Supported................................................................... E-1
APPENDIX F

Troubleshooting the MVME172: Solving Startup Problems

List of Figures
Figure 1-1. MVME172 Block Diagram...................................................................1-14
Figure 2-1. MVME172 Switches, Headers, Connectors, and LEDs..........................2-4
Figure 2-2. Serial Interface Module, Connector Side ................................................2-6
Figure 2-3. MVME172 EIA-232-D Connections, MVME712M (Sheet 1 of 6) .....2-22
Figure 2-4. MVME172 EIA-530 Connections (Sheet 1 of 2) .................................2-28
Figure 2-5. MVME172 EIA-232-D Connections, MVME712A/AM/-12/-13 (Sheet 1 of 4)
2-30
Figure 2-6. MVME172 EIA-485/EIA-422 Connections .........................................2-34

xiii

List of Tables
Table 1-1. MVME172 Specifications ........................................................................1-9
Table 1-2. Local Bus Arbitration Priority ................................................................1-30
Table 1-3. DRAM Performance ...............................................................................1-30
Table 1-4. Local Bus Memory Map ........................................................................1-34
Table 1-5. Local Bus I/O Devices Memory Map ....................................................1-36
Table 2-1. Jumper-Configurable Options...................................................................2-3
Table 2-2. Serial Interface Module Part Numbers .....................................................2-6
Table 2-3. J2 Snoop Control Encoding ....................................................................2-11
Table 4-1. Debugger Address Parameter Formats .....................................................4-5
Table 4-2. Exception Vectors Used by 172Bug .......................................................4-14
Table 4-3. Debugger Commands .............................................................................4-22
Table A-1. ENV Command Parameters ..................................................................A-4
Table B-1. EIA-232-D Interconnections ................................................................. B-2
Table B-2. EIA-232-D Interface Transmitter Characteristics .................................. B-4
Table B-3. EIA-232-D Interface Receiver Characteristics ...................................... B-4
Table B-4. Serial Port B EIA-530 Interconnect Signals ......................................... B-5
Table B-5. EIA-530 Interface Transmitter Characteristics ...................................... B-7
Table B-6. EIA-530 Interface Receiver Characteristics .......................................... B-8
Table B-7. Serial Port B EIA-485/EIA-422 Interconnect Signals .......................... B-9
Table B-8. EIA-485 Interface Transmitter (Generator) Characteristics ................ B-10
Table B-9. EIA-485 Interface Receiver (Load) Characteristics ............................ B-11
Table F-1. Troubleshooting Steps ........................................................................... F-1

1Board Level Hardware
Description

Introduction
This chapter describes the board level hardware features of the MVME172
VME Embedded Controller. The chapter is organized with a board-level
overview and features list in this introduction, followed by a more detailed
hardware functional description. Front panel switches and indicators are
included in the detailed hardware functional description. The chapter
closes with some general memory maps.
All programmable registers in the MVME172 that reside in ASICs are
covered in the MVME172 VME Embedded Controller Programmer’s
Reference Guide.

Overview
The MVME172 is based on the MC68060 or MC68LC060
microprocessor. Various versions of the MVME172 have 4, 8, or 16MB of
unprotected DRAM, 8KB of SRAM (with battery backup), time-of-day
clock (with battery backup), Ethernet transceiver interface, two serial ports
with EIA-232-D or EIA-530 or EIA-485/422 interface, six tick timers,
watchdog timer, a PROM socket, 2MB Flash memory (one Flash device),
four IndustryPack (IP) interfaces with DMA, SCSI bus interface with
DMA, VMEbus controller, and 512 KB of SRAM with battery backup.
The I/O on the MVME172 is connected to the VMEbus P2 connector. The
main board is connected through a P2 transition board and cables to the
transition boards. The MVME172 supports the transition boards
MVME712-12, MVME712-13, MVME712M, MVME712A,
MVME712AM, and MVME712B (referred to in this manual as
MVME712x, unless separately specified). The MVME712x transition
boards provide configuration headers and industry-standard connectors for
I/O devices.

1-1

Introduction

The I/O connection for the serial ports on the MVME172 is also
implemented with two DB25 front panel I/O connectors. The MVME712
series transition boards were designed to support the MVME167 boards,
but can be used on the MVME172 if you take some special precautions.
Refer to the Serial Communications Interface section for more
information. These transition boards provide configuration headers, serial
port drivers and industry-standard connectors for the I/O devices.
The following ASICS are used on the MVME172:
❏

VMEchip2. (VMEbus interface). Provides two tick timers, a
watchdog timer, programmable map decoders for the master and
slave interfaces, and a VMEbus to/from local bus DMA controller,
a VMEbus to/from local bus non-DMA programmed access
interface, a VMEbus interrupter, a VMEbus system controller, a
VMEbus interrupt handler, and a VMEbus requester.
Processor-to-VMEbus transfers are D8, D16, or D32. VMEchip2
DMA transfers to the VMEbus, however, are D16, D32, D16/BLT,
D32/BLT, or D64/MBLT.

❏

MC2 chip. Provides four tick timers, the interface to the LAN chip,
SCSI chip, serial port chip, BBRAM, EPROM/Flash, parity-DRAM
and SRAM.

❏

IndustryPack Interface Controller (IP2). The IP2 provides
control and status information for up to two singlewide IPs or one
doublewide IP that can be plugged into the MVME172 main board.

http://www.mcg.mot.com/literature

1-2

Board Level Hardware Description

Related Documentation
This manual includes installation instructions, jumper configuration
information, memory maps, debugger/monitor commands, and any other
information needed to start up the board.
If you wish to develop your own applications or need more detailed
information about your MVME172FX VME Embedded Controller, you
may purchase the additional documentation listed on the following pages.
The publications listed below are referenced in this document. To purchase
manuals you may contact Motorola in these ways:
❏

Through your local Motorola sales office

❏

By contacting the Literature Center via phone or fax at the numbers
listed under Product Literature at MCG’s World Wide Web site,
http://www.mcg.mot.com/literature.

Motorola Publication
Number

Description

68KBUG1/D 68KBUG2/D

Debugging Package for Motorola 68K CISC CPUs User’s
Manual (Parts 1 and 2)

VME172A/PG

MVME172 VME Embedded Controller Programmer’s
Reference Guide

V172DIAA/UM

MVME172Bug Diagnostics Manual

SBCSCSI/D

Single Board Computers SCSI Software User’s Manual

SIMM09A/IH

SIMM09 Serial Interface Module Installation Guide

VME712MA/IH

MVME712M Transition Module and P2 Adapter Board
Installation and Use

MVME712A/D

MVME712-12, MVME712-13, MVME712A,
MVME712AM, and MVME712B Transition Modules and
LCP2 Adapter Board User’s Manual

Each Motorola Computer Group manual publication number is suffixed
with characters that represent the revision level of the document, such as
/IH2 (second revision).
To obtain the most up-to-date product information in PDF or HTML
format, visit our Web site at http://www.mcg.mot.com/literature.

1-3

Computer Group Literature Center Web Site

Introduction

Other Applicable Motorola Publications
The following publications are applicable to the MVME172 and may
provide additional helpful information. They may be purchased from:
Motorola Semiconductor Products Sector
Literature Distribution
Telephone: 1-800-441-2447
FAX: (602) 994-6430 or (303) 675-2150
E-mail: ldcformotorola@hibbertco.com
Motorola Publication
Number

Description

M68000FR

M68000 Family Reference Manual

M68060UM

MC68060 Microprocessors User’s Manual

M68040UM

MC68040 Microprocessors User’s Manual

Applicable Non-Motorola Publications
The following non-Motorola publications are also available from the
sources indicated.
Document Title

Source

VME64 Specification, order number
ANSI/VITA 1-1994

VITA (VMEbus International
Trade Association)
7825 E. Gelding Dr., Ste. 104
Scottsdale, AZ 85260-3415

Note: An earlier version of the VME
specification is available as:
Versatile Backplane Bus: VMEbus,
ANSI/IEEE Std 1014-1987
(VMEbus Specification) (This is also
Microprocessor System Bus for 1 to 4 Byte
Data, IEC 821 BUS)
ANSI Small Computer System Interface-2
(SCSI-2), Draft Document X3.131-198X,
Revision 10c

http://www.mcg.mot.com/literature

Global Engineering Documents
15 Inverness Way East
Englewood, CO 80112-5704

1-4

Board Level Hardware Description

Document Title

Source

82596CA Local Area Network Coprocessor
Data Sheet, order number 290218; and
82596 User’s Manual, order number

Intel Corporation
Literature Sales
P.O. Box 58130
Santa Clara, CA 95052-8130

296853
28F016SA Flash Memory Data Sheet,
order number 290435

Intel Corporation
Literature Sales
P.O. Box 7641,
Mt. Prospect, IL 60056-7641

NCR 53C710 SCSI I/O Processor Data
Manual,
order number NCR53C710DM

NCR Corporation
Microelectronics Products
Division
1635 Aeroplaza Dr.
Colorado Springs, CO 80916

NCR 53C710 SCSI I/O Processor
Programmer’s Guide, order number

NCR53C710PG

1-5

MK48T58(B) Timekeeper TM and 8Kx8
Zeropower TM RAM data sheet in Static
RAMs
Databook, order number DBSRAM71

SGS-THOMSON
Microelectronics Group
Marketing Headquarters
1000 East Bell Rd.
Phoenix, AZ 85022-2699

IndustryPack Logic Interface
Specification, Revision 1.0, order number
ANSI/VITA 4-1995

VITA (VMEbus International
Trade Association)
7825 E. Gelding Dr., Ste. 104
Scottsdale, AZ 85260-3415

Z85230 Serial Communications Controller
Data Sheet

Zilog Inc.
210 Hacienda Ave.
Campbell, CA 95008-6609

Computer Group Literature Center Web Site

MCG Customer Services

MCG Customer Services
The Motorola Computer Group Customer Services organization provides
numerous services that support the needs of our OEM customers
throughout the qualification, development, deployment, and continued
service phases of their product life cycles. Specific areas of support
include:
❏

Helping you identify and address your unique needs for providing
outstanding products to your customers

❏

Extended warranties

❏

24 X 7 access to the high-level technical assistance that is crucial for
mission critical applications around the world

❏

24 X 7 access to the latest technical information on MCG products,
including known problems and a solutions database

❏

Customized training available at the MCG campus or at any of your
sites across the world

❏

Customized documentation and 24 X 7 Internet access to product
documentation

❏

Services Central, a one-stop information source about customer
services -- program content, pricing, and availability

For information on what services are available, or to purchase a support
contract, call us at Services Central, at 1-800-624-6745 or 602-438-5875,
or visit our website at http://www.mcg.mot.com/support.

http://www.mcg.mot.com/literature

1-6

Board Level Hardware Description

Requirements
These boards are designed to conform to the requirements of the following
documents:
❏

VME64 Specification, VITA

❏

EIA-232-D Serial Interface Specification, EIA

❏

SCSI Specification, ANSI

❏

IndustryPack Specification, VITA

❏

The MC68060 has a clock frequency of 60 MHz; the MC68LC060
has a clock frequency of 64 MHz

❏

4, 8, or 16MB of shared DRAM with no protection

❏

512KB of SRAM with battery backup

❏

One JEDEC standard 32-pin PLCC EPROM socket

❏

One Intel 28F016SA 2M x 8 Flash memory device (2MB Flash
memory total)

❏

8K by 8 Non-Volatile RAM and time of day clock with battery
backup

❏

Four 32-bit Tick Timers (in the MC2 chip ASIC) for periodic
interrupts

❏

Two 32-bit Tick Timers (in the VMEchip2 ASIC) for periodic
interrupts

❏

Watchdog timer

❏

Eight software interrupts (for MVME172 versions that have the
VMEchip2)

❏

I/O

Features

1-7

Computer Group Literature Center Web Site

MCG Customer Services

– Two serial ports (one EIA-232-D DCE; one EIA-232-D
DCE/DTE or EIA-530 DCE/DTE or EIA-422 DCE/DTE or
EIA-485)
– Serial port controller (Zilog Z85230)
– Optional Small Computer Systems Interface (SCSI) bus
interface with 32-bit local bus burst Direct Memory Access
(DMA) (NCR 53C710 controller)
– Optional LAN Ethernet transceiver interface with 32-bit local
bus DMA (Intel 82596CA controller)
– Four IndustryPack interfaces with DMA
❏

VMEbus interface (boards may be special-ordered without the
VMEbus interface)
– VMEbus system controller functions
– VMEbus interface to local bus (A24/A32,
D8/D16/D32 (D8/D16/D32/D64 BLT) (BLT = Block Transfer)
– Local bus to VMEbus interface (A16/A24/A32, D8/D16/D32)
– VMEbus interrupter
– VMEbus interrupt handler
– Global CSR for interprocessor communications
– DMA for fast local memory - VMEbus transfers (A16/A24/A32,
D16/D32 (D16/D32/D64 BLT)

❏

Switches and Light-Emitting Diodes (LEDs)
– Two pushbutton switches (ABORT and RESET)
– Eight LEDs (FAIL, STAT, RUN, SCON, LAN, FUSE, SCSI, and VME)

http://www.mcg.mot.com/literature

1-8

Board Level Hardware Description

Specifications
General specifications for the MVME172 are listed in Table 1-1.
Table 1-1. MVME172 Specifications
Characteristics

Specifications

Power requirements
(with PROM; without IPs)

+5 Vdc (± 5%), 3.5 A typical, 4.5 A max.
+12 Vdc (± 5%), 100 mA (max.)
-12 Vdc (± 5%), 100 mA (max.)

Operating temperature

0° to 70° C exit air with forced air cooling*

Storage temperature

-40° to +85° C

Relative humidity

5% to 90% (noncondensing)

Physical dimensions
PC board with
mezzanine module
only
Height
Depth
Thickness
PC board with
connectors and
front panel
Height
Depth
Thickness

Double-high VMEboard

9.187 inches (233.35 mm)
6.299 inches (160.00 mm)
0.662 inch (16.77 mm)

10.309 inches (261.85 mm)
7.4 inches (188 mm)
0.80 inch (20.32 mm)

*Refer to Cooling Requirements and Special Considerations for Elevated
Temperature Operation.

1-9

Computer Group Literature Center Web Site

MCG Customer Services

Cooling Requirements
The Motorola MVME172 VME Embedded Controller is specified,
designed, and tested to operate reliably with an incoming air temperature
range from 0° to 55° C (32° to 131° F) with forced air cooling at a velocity
typically achievable by using a 100 CFM axial fan. Temperature
qualification is performed in a standard Motorola VMEsystem chassis.
Twenty-five-watt load boards are inserted in two card slots, one on each
side, adjacent to the board under test, to simulate a high power density
system configuration. An assembly of three axial fans, rated at 100 CFM
per fan, is placed directly under the VME card cage. The incoming air
temperature is measured between the fan assembly and the card cage,
where the incoming airstream first encounters the controller under test.
Test software is executed as the controller is subjected to ambient
temperature variations. Case temperatures of critical, high power density
integrated circuits are monitored to ensure component vendors
specifications are not exceeded.
While the exact amount of airflow required for cooling depends on the
ambient air temperature and the type, number, and location of boards and
other heat sources, adequate cooling can usually be achieved with 10 CFM
and 490 LFM flowing over the controller. Less airflow is required to cool
the controller in environments having lower maximum ambients. Under
more favorable thermal conditions, it may be possible to operate the
controller reliably at higher than 55° C with increased airflow. It is
important to note that there are several factors, in addition to the rated
CFM of the air mover, which determine the actual volume and speed of air
flowing over the controller.

Special Considerations for Elevated Temperature Operation
The following information is for users whose applications for the
MVME172 may subject it to high temperatures.
The MVME172 uses commercial grade devices. Therefore, it can operate
in an environment with ambient air temperature from 0° C to 70° C. There
are many factors that affect the ambient temperature seen by components

http://www.mcg.mot.com/literature

1-10

Board Level Hardware Description

on the MVME172: inlet air temperature; air flow characteristics; number,
types, and locations of IndustryPack (IP) modules; power dissipation of
adjacent boards in the system, etc.
A temperature profile of the MVME172 (MVME172-513) was developed
in an MVME945 12-slot VME chassis. This board was loaded with one
GreenSpring IP-Dual P/T module (position a) and three GreenSpring IP488 modules (positions b, c, and d). One twenty-five watt load board was
installed adjacent to each side of the board under test. The exit air velocity
was approximately 200 LFM between the MVME172 and the IP-Dual P/T
module. Under these circumstances, a 10° C rise between the inlet and exit
air was observed. At 70° C exit air temperature (60° C inlet air), the
junction temperatures of devices on the MVME172 were calculated (from
the measured case temperatures) and did not exceed 100° C.

!
Caution

For elevated temperature operation, the user must perform
similar measurements and calculations to determine what
operating margin exists for any specific environment.
The following are some steps that the user can take to help make elevated
temperature operation possible:
1. Position the MVME172 board in the chassis for maximum airflow
over the component side of the board.
2. Avoid placing boards with high power dissipation adjacent to the
MVME172.
3. Use low power IP modules only. The preferred locations for IP
modules are position a (J4 and J5) and position d (J29 and J30).

1-11

Computer Group Literature Center Web Site

MCG Customer Services

FCC Compliance
The MVME172 was tested without IndustryPacks in an FCC-compliant
chassis and meets the requirements for Class A equipment. FCC
compliance was achieved under the following conditions:
1. Shielded cables on all external I/O ports.
2. Cable shields connected to earth ground via metal shell connectors
bonded to a conductive module front panel.
3. Conductive chassis rails connected to earth ground. This provides
the path for connecting shields to earth ground.
4. Front panel screws properly tightened.
For minimum RF emissions, it is essential that the conditions above be
implemented. Failure to do so could compromise the FCC compliance of
the equipment containing the module.

Manual Terminology
Throughout this manual, a convention is used which precedes data and
address parameters by a character identifying the numeric format as
follows:
$

dollar

specifies a hexadecimal character

percent

specifies a binary number

ampersand

specifies a decimal number

For example, “12” is the decimal number twelve, and "$12" is the decimal
number eighteen.
Unless otherwise specified, all address references are in hexadecimal.
An asterisk (*) following the signal name for signals which are level
significant denotes that the signal is true or valid when the signal is low.
An asterisk (*) following the signal name for signals which are edge
significant denotes that the actions initiated by that signal occur on high to
low transition.

http://www.mcg.mot.com/literature

1-12

Board Level Hardware Description

In this manual, assertion and negation are used to specify forcing a signal
to a particular state. In particular, assertion and assert refer to a signal that
is active or true; negation and negate indicate a signal that is inactive or
false. These terms are used independently of the voltage level (high or low)
that they represent.
Data and address sizes are defined as follows:
❏

A byte is eight bits, numbered 0 through 7, with bit 0 being the least
significant.

❏

A word is 16 bits, numbered 0 through 15, with bit 0 being the least
significant.

❏

A longword is 32 bits, numbered 0 through 31, with bit 0 being the
least significant.

The terms control bit and status bit are used extensively in this document.
The term control bit is used to describe a bit in a register that can be set and
cleared under software control. The term true is used to indicate that a bit
is in the state that enables the function it controls. The term false is used to
indicate that the bit is in the state that disables the function it controls. In
all tables, the terms 0 and 1 are used to describe the actual value that should
be written to the bit, or the value that it yields when read.
The term status bit is used to describe a bit in a register that reflects a
specific condition. The status bit is read by software to determine
operational or exception conditions.

1-13

Computer Group Literature Center Web Site

MCG Customer Services

Block Diagram
Figure 1-1 is a general block diagram of the MVME172.

MC68060
OR
MC68LC060

82596CA
LAN
ETHERNET

Z85230
SCC
SERIAL I/O

53C710
SCSI

FLASH
MEMORY
1MB

MC2 chip

DRAM
4, 8, 16MB

VMEchip2

IP2 chip

VMEbus

SRAM
512MB

IPA
SOCKET

MK48T58
BBRAM
& CLOCK

PROM
SOCKET

IPB
SOCKET

IPC
SOCKET

IPD
SOCKET

2018 9703

Figure 1-1. MVME172 Block Diagram

http://www.mcg.mot.com/literature

1-14

Board Level Hardware Description

Functional Description
This section contains a functional description of the major blocks on the
MVME172.

Front Panel Switches and Indicators
There are switches and LEDs on the front panel of the MVME172. The
switches are RESET and ABORT. The RESET switch resets all onboard
devices and drives SYSRESET* if the board is system controller. The
RESET switch may be disabled by software.
When enabled by software, the ABORT switch generates an interrupt at a
user-programmable level. It is normally used to abort program execution
and return to the debugger.
There are eight LEDs on the MVME172 front panel: FAIL, STAT, RUN,
SCON, LAN, FUSE (LAN power), SCSI, and VME.
The red FAIL LED (part of DS1) lights when the BRDFAIL signal line is
active.
The MC68060 status lines are decoded, on the MVME172, to drive the
yellow STAT (status) LED (part of DS1). In this case, a halt condition from
the processor lights the LED.
The green RUN LED (part of DS2) lights when the local bus TIP* signal
line is low. This indicates one of the local bus masters is executing a local
bus cycle.
The green SCON LED (part of DS2) lights when the VMEchip2 is the
VMEbus system controller.
The green LAN LED (part of DS3) lights when the LAN chip is local bus
master.
The green FUSE LED lights when the solid-state fuses for the IP ±12V, IP
+5V, and LAN transceiver +12V are functional.
The green SCSI LED (part of DS4) lights when the SCSI chip is local bus
master.

1-15

Computer Group Literature Center Web Site

Functional Description

The green VME LED (part of DS4) lights when the board is using the
VMEbus (VMEbus AS* is asserted by the VMEchip2) or when the board
is accessed by the VMEbus (VMEchip2 is the local bus master).

Data Bus Structure
The local data bus on the MVME172 is a 32-bit synchronous bus that is
based on the MC68060 bus, and which supports burst transfers and
snooping. The various local bus master and slave devices use the local bus
to communicate. The local bus is arbitrated by priority type arbiter and the
priority of the local bus masters from highest to lowest is: 82596CA LAN,
IndustryPack DMA, 53C710 SCSI, VMEbus, and MPU. Generally
speaking, any master can access any slave; however, not all combinations
pass the common sense test. Refer to the MVME172 VME Embedded
Controller Programmer’s Reference Guide and to the user’s guide for each
device to determine its port size, data bus connection, and any restrictions
that apply when accessing the device.

MC68060 or MC68LC060 MPU
The MVME172 may be ordered with an MC68060 or MC68LC060
microprocessor.
The MC68060 has on-chip instruction and data caches and a floating point
processor. (The floating point coprocessor is the major difference between
the MC68060 and MC68LC060.) Refer to the M68060 user’s manual for
more information.
MC68xx060 Cache
The MVME172 local bus masters (VMEchip2, MC68xx060, 53C710
SCSI controller, and 82596CA Ethernet controller) have programmable
control of the snoop/caching mode. The IP DMA local bus master’s snoop
control function is controlled by a jumper at J2. J2 controls the value of the
snoop control signal for all IP DMA transfers. This includes the IP DMA
which is executed when the DMA control registers are updated while the

http://www.mcg.mot.com/literature

1-16

Board Level Hardware Description

IP DMA is operating in the command chaining mode. The MVME172
local bus slaves which support MC68xx060 bus snooping are defined in
the Local Bus Memory Map table later in this chapter.

No-VMEbus-Interface Option
The MVME172 can be operated as an embedded controller without the
VMEbus interface. For this option, the VMEchip2 and the VMEbus
buffers are not populated. Also, the bus grant daisy chain and the interrupt
acknowledge daisy chain have zero-ohm bypass resistors installed.
To support this feature, certain logic in the VMEchip2 has been duplicated
in the MC2 chip. This logic is inhibited in the MC2 chip if the VMEchip2
is present. The enables for these functions are controlled by software and
MC2 chip hardware initialization.
Note that MVME172 models ordered without the VMEbus interface are
shipped with Flash memory blank (the factory uses the VMEbus to
program the Flash memory with debugger code). To use the 172Bug
package, MVME172Bug, be sure that jumper header J28 is configured for
the EPROM memory map. Refer to Chapter 3 and Chapter 4 for further
details.
Contact your local Motorola sales office for ordering information.

Memory Options
The following memory options are used on the different versions of
MVME172 boards.
DRAM Options
The MVME172 implementation includes a 4MB, 8MB, or 16MB DRAM
option. The DRAM architecture is non-interleaved for 4MB and 8MB,
while the 16MB architecture is interleaved. The 4MB DRAM option is
located entirely on the MVME172 base board; the 8MB and 16MB options
include 4MB or 12MB on a mezzanine module. The DRAM is not parity
protected.

1-17

Computer Group Literature Center Web Site

Functional Description

The following table defines the combinations of base board and mezzanine
population options used for the MVME172 series of modules.
Mezzanine
MB

Base Board
MB

Available
DRAM

Interleaved

MC2 chip Size
(@ register offset
$25)

100

4 (bank 2)

101

12 (banks 2,
3, and 4)

111

SRAM Options
The MVME172 implementation includes a 512KB SRAM option. SRAM
architecture is single non-interleaved. SRAM performance is specified in
the section on the SRAM Memory Controller in the MC2 chip
Programming Model in the MVME172 VME Embedded Controller
Programmer’s Reference Guide. A battery supplies VCC to the SRAMs
when main power is removed. The worst case elapsed time for battery
protection is 200 days.
The SRAM arrays are not parity protected.
The MVME172 SRAM battery backup function is provided by a Dallas
DS1210S. The DS1210S supports primary and secondary power sources.
When the main board power fails, the DS1210S selects the source with the
highest voltage. If one source should fail, the DS1210S switches to the
redundant source. Each time the board is powered, the DS1210S checks
power sources and if the voltage of the backup sources is less than two
volts, the second memory cycle is blocked. This allows software to provide
an early warning to avoid data loss. Because the DS1210S may block the
second access, the software should do at least two accesses before relying
on the data.

http://www.mcg.mot.com/literature

1-18

Board Level Hardware Description

The MVME172 provides jumpers (on J22) that allow either power source
of the DS1210S to be connected to the VMEbus +5V STDBY pin or to one
cell of the onboard battery. For example, the primary system backup
source may be a battery connected to the VMEbus +5V STDBY pin and
the secondary source may be the onboard battery. If the system source
should fail or the board is removed from the chassis, the onboard battery
takes over. Refer to Chapter 2 for the jumper configurations.

!
Caution

For proper operation of the SRAM, some jumper
combinations must be installed on the Backup Power Source
Select Header (J22). If one of the jumpers is used to select the
battery, the battery must be installed on the MVME172. The
SRAM may malfunction if inputs to the DS1210S are left
unconnected.
The SRAM is controlled by the MC2 chip, and the access time is
programmable. Refer to the MC2 chip description in the MVME172 VME
Embedded Controller Programmer’s Reference Guide for more detail.

About the Battery
The power source for the onboard SRAM is a RAYOVAC FB1225 battery
with two BR1225 type lithium cells which is socketed for easy removal
and replacement. A small capacitor is provided to allow the battery to be
quickly replaced without data loss.
The lifetime of the battery is very dependent on the ambient temperature
of the board and the power-on duty cycle. The lithium battery supplied on
the MVME172 should provide at least two years of backup time with the
board powered off and with an ambient temperature of 40° C. If the poweron duty cycle is 50% (the board is powered on half of the time), the battery
lifetime is four years. At lower ambient temperatures the backup time is
greatly extended and may approach the shelf life of the battery.
When a board is stored, the battery should be disconnected to prolong
battery life. This is especially important at high ambient temperatures. The
MVME172 is shipped with the batteries disconnected (i.e., with VMEbus
+5V standby voltage selected as both primary and secondary power

1-19

Computer Group Literature Center Web Site

Functional Description

source). If you intend to use the battery as a power source, whether primary
or secondary, it is necessary to reconfigure the jumpers on J22 before
installing the module. Refer to SRAM Battery Backup Source Select
Header (J22) for available jumper configurations.
The power leads from the battery are exposed on the solder side of the
board, therefore the board should not be placed on a conductive surface or
stored in a conductive bag unless the battery is removed.

!
Warning

Lithium batteries incorporate inflammable materials such as
lithium and organic solvents. If lithium batteries are
mistreated or handled incorrectly, they may burst open and
ignite, possibly resulting in injury and/or fire. When dealing
with lithium batteries, carefully follow the precautions listed
below in order to prevent accidents.
❏

Do not short circuit.

❏

Do not disassemble, deform, or apply excessive pressure.

❏

Do not heat or incinerate.

❏

Do not apply solder directly.

❏

Do not use different models, or new and old batteries together.

❏

Do not charge.

❏

Always check proper polarity.

http://www.mcg.mot.com/literature

1-20

Board Level Hardware Description

To remove the battery from the module, carefully pull the battery from the
socket.
Before installing a new battery, ensure that the battery pins are clean. Note
the battery polarity and press the battery into the socket. When the battery
is in the socket, no soldering is required.
EPROM and Flash Memory
The MVME172 implementation includes 2MB of Flash memory (an 8Mbit Flash device organized as a 2M x 8). For information on
programming Flash, refer to the Intel documents listed in Related
Documentation.
The Flash write enable is controlled by a bit in the Flash Access Time
Control Register in the MC2 chip. Refer to the MVME172 Embedded
Controller Programmer’s Reference Guide for more detail.
The EPROM location is a standard JEDEC 32-pin PLCC capable of 4 Mbit
densities organized as a 512KB x 8 device. Depending on a jumper setting
(GPI3, pins 9-10 on J28), the MC68xx060 reset code can be fetched from
either the Flash (GPI3 installed) or EPROM (GPI3 removed).
Note that MVME172 models ordered without the VMEbus interface are
shipped with Flash memory blank (the factory uses the VMEbus to
program the Flash memory with debugger code). To use the 172Bug
package, MVME172Bug, be sure that jumper header J28 is configured for
the EPROM memory map. Refer to Chapter 3 and Chapter 4 for further
details.

1-21

Computer Group Literature Center Web Site

Functional Description

Battery Backed Up RAM and Clock
The MK48T58 RAM and clock chip is used on the MVME172. This chip
provides a time-of-day clock, oscillator, crystal, power failure detection,
8KB of RAM, and a battery in one 28-pin package. The clock provides
seconds, minutes, hours, day, date, month, and year in BCD 24-hour
format. Corrections for 28- day, 29-day (leap year), and 30-day months are
automatically made. No interrupts are generated by the clock. The
MK48T58 is an 8 bit device; however, the interface provided by the MC2
chip supports 8-bit, 16-bit, and 32-bit accesses to the MK48T58. Refer to
the MC2 chip description in the MVME172 VME Embedded Controller
Programmer’s Reference Guide and to the MK48T58 data sheet for
detailed programming and battery life information.

VMEbus Interface and VMEchip2
The local bus to VMEbus interface and the VMEbus to local bus interface
are provided by the optional VMEchip2. The VMEchip2 can also provide
the VMEbus system controller functions. Refer to the VMEchip2
description in the MVME172 VME Embedded Controller Programmer’s
Reference Guide for detailed programming information.
Note that the ABORT switch logic in the VMEchip2 is not used. The GPI
inputs to the VMEchip2 which are located at $FFF40088 bits 7-0 are not
used. The ABORT switch interrupt is integrated into the MC2 chip ASIC at
location $FFF42043. The GPI inputs are integrated into the MC2 chip
ASIC at location $FFF4202C bits 23-16.

http://www.mcg.mot.com/literature

1-22

Board Level Hardware Description

I/O Interfaces
The MVME172 provides onboard I/O for many system applications. The
I/O functions include serial ports, IndustryPack (IP) interfaces, optional
LAN Ethernet transceiver interface, and optional SCSI mass storage
interface.
Serial Communications Interface
The MVME172 uses a Zilog Z85230 serial communications controller to
implement the two serial communications interfaces. Each interface
supports CTS, DCD, RTS, and DTR control signals; as well as the TxD
and RxD transmit/receive data signals, and TxC/RxC synchronous clock
signals.
The Z85230 supports synchronous (SDLC/HDLC) and asynchronous
protocols. The MVME172 hardware supports asynchronous serial baud
rates of 110b/s to 38.4Kb/s.
The Z85230 supplies an interrupt vector during interrupt acknowledge
cycles. The vector is modified based upon the interrupt source within the
Z85230. Interrupt request levels are programmed via the MC2 chip. (One
MC2 chip can handle up to four Z85230 chips.) Refer to the Z85230 data
sheet listed in this chapter, and to the MC2 chip Programming Model in the
MVME172 VME Embedded Controller Programmer’s Reference Guide,
for information.
MVME172 Serial Port 1
The A port of the Z85230 is interfaced as DCE (data circuit-terminating
equipment) with the EIA-232-D interface and is routed to:
❏

1-23

The DB-25 connector marked SERIAL PORT 1/CONSOLE on the
front panel of the MVME172. SERIAL PORT 1/CONSOLE is an
EIA-232-D DCE port.

Computer Group Literature Center Web Site

Functional Description

Note

❏

This port can be connected to the TX and RX clocks which
may be present on the DB-25 connector. These connections
are made via jumper header J16 on the MVME172 board.
(The TxC and RxC clock lines are not available on the
MVME712x transition modules.)
One of the following output connectors on the MVME712x
transition module:
MVME712M: The DB-25 connector marked SERIAL PORT 2 on
the front panel. SERIAL PORT 2 can be configured as an EIA-232D DTE or DCE port, via jumper headers J16 and J17.
MVME712A or MVME712-12: The DB-9 connector marked
SERIAL PORT 2 on the front panel. SERIAL PORT 2 is hardwired
as an EIA-232-D DTE port.
MVME712AM or MVME712-13: The DB-9 connector marked
SERIAL PORT 2 OR the RJ-11 jack on the front panel. SERIAL
PORT 2 is hardwired as EIA-232-D DTE; the RJ-11 jack utilizes the
built-in modem. Setting the jumper headers J16 and J17 on the
MVME712AM/-13 configures the output as EIA-232-D DTE at
SERIAL PORT 2 or as a modem at the RJ-11 jack.

Figure 2-3 (sheets 1 and 2) in Chapter 2 illustrates the two configurations
available for Port A when the MVME172 is used with an MVME712M.
Figure 2-5 (sheets 1 and 2) shows the two configurations available for Port
A when the MVME172 is used with an MVME712A/AM/-12/-13.
MVME172 Serial Port 2
The configuration of the B port of the Z85230 is determined via a Serial
Interface Module (SIMM) which is installed at connector J15 on the
MVME172 board. There are five SIMMs available:
SIMM05 -- DTE with EIA-232-D interface
SIMM06 -- DCE with EIA-232-D interface
SIMM07 -- DTE with EIA-530 interface
SIMM08 -- DCE with EIA-530 interface
SIMM09 -- EIA-485 interface, or DCE or DTE with EIA-422 interface

http://www.mcg.mot.com/literature

1-24

Board Level Hardware Description

Port B is routed, via the SIMM, to:
❏

Note

❏

The DB-25 connector marked SERIAL PORT 2 on the front panel
of the MVME172. SERIAL PORT 2 will be an EIA-232-D DCE or
DTE port, or an EIA-530 DCE or DTE port, or an EIA-485 port, or
an EIA-422 DCE or DTE port, depending upon which SIMM is
installed.
This port can be connected to the TX and RX clocks which
may be present on the DB-25 connector. These connections
are made via jumper header J17 on the MVME172 board.
(The TxC and RxC clock lines are available at the
MVME712M SERIAL PORT 4 via header J15, but are not
available on the other MVME712x transition modules.)
One of the following output connectors on the MVME712x
transition module:
MVME712M: The DB-25 connector marked SERIAL PORT 4 on
the front panel. SERIAL PORT 4 can be configured as an EIA-232D DTE or DCE port, via the jumper headers J18 and J19 on the
MVME712M.
MVME712A, AM, -12, or -13: The DB-9 connector marked
SERIAL PORT 4 on the front panel. SERIAL PORT 4 is hard-wired
as an EIA-232-D DTE port.

Figure 2-3 (sheets 3 through 6) in Chapter 2 illustrates the four
configurations available for Port B when the MVME172 is used with an
MVME712M. Note that the port configurations shown in Figure 2-3 sheets
5 and 6 are not recommended for synchronous applications because of the
incorrect clock direction. Figure 2-4 (sheets 1 and 2) shows an MVME172
with the two configurations available with EIA-530 SIMMs. Figure 2-5
(sheets 3 and 4) shows the two configurations available for Port B when
the MVME172 is used with an MVME712A/AM/-12/-13. Figure 2-6
shows an MVME172 with the configuration available with the EIA-485
/EIA-422 SIMM.

1-25

Computer Group Literature Center Web Site

Functional Description

!
Caution

Do not simultaneously connect serial data devices to the
equivalent ports on the MVME712 series transition module
and the MVME172 front panel. This could result in
simultaneous transmission of conflicting data.

Do not connect peripheral devices to Port 1, Port 3, or the
Centronics printer port on the MVME712x transition module.
In the EIA-232-D case, none of these ports are connected to
any MVME172 circuits. In the EIA-530 case, attempting to
use these ports would produce certain connections with the
potential to damage the MVME172 or the peripherals.

When using an EIA-530 SIMM or an EIA-485/EIA-422
SIMM, do not connect the MVME172 to an MVME712x
board. The EIA-530, EIA-485, and EIA-422 signals are not
supported by the P2 adapter and the transition boards.

IndustryPack (IP) Interfaces
The IP2 chip ASIC on the MVME172 supports four IndustryPack (IP)
interfaces: these are accessible from the front panel. The IP2 also includes
four DMA channels (one for each IP, or two for each double size IP), 32
or 30MHz (32 MHz for MC68LC060 or 30 MHz for MC68060) or 8MHz
IndustryPack clock selection (jumper selectable), and one programmable
timebase strobe which is connected to the four interfaces. Refer to the IP2
chip Programming Model in the MVME172 VME Embedded Controller
Programmer’s Reference Guide for details of the IP interface. Refer to
Appendix B for the pin assignments of the IP connectors.

http://www.mcg.mot.com/literature

1-26

Board Level Hardware Description

Notes The MVME172 boards do not monitor power supply +5 Vdc
power and assert IP reset if the power falls too low. Instead,
IP reset is handled by the ENV command of the 172Bug
debugger, as described in Appendix A. The IP reset is also
driven active by the power-up reset signal.
Two IP modules plugged into the same MVME172 board can
not use the Strobe∗ unless J19 is removed. This will
disconnect the Strobe* output from the IP2 chip ASIC.
Optional LAN Ethernet Interface
The MVME172 uses the 82596CA to implement the Ethernet transceiver
interface. The 82596CA accesses local RAM using DMA operations to
perform its normal functions. Because the 82596CA has small internal
buffers and the VMEbus has an undefined latency period, buffer overrun
may occur if the DMA is programmed to access the VMEbus. Therefore,
the 82596CA should not be programmed to access the VMEbus.
Every MVME172 that has the Ethernet interface is assigned an Ethernet
Station Address. The address is $08003E2xxxxx where xxxxx is the unique
5-nibble number assigned to the board (i.e., every MVME172 has a
different value for xxxxx).
Each board has an Ethernet Station Address displayed on a label attached
to the VMEbus P2 connector. In addition, the six bytes including the
Ethernet address are stored in the configuration area of the BBRAM. That
is, 08003E2xxxxx is stored in the BBRAM. At an address of $FFFC1F2C,
the upper four bytes (08003E2x) can be read. At an address of $FFFC1F30,
the lower two bytes (xxxx) can be read. The MVME172 debugger has the
capability to retrieve or set the Ethernet address.
If the data in the BBRAM is lost, the user should use the number on the
VMEbus P2 connector label to restore it.
The Ethernet transceiver interface is located on the MVME172 main
board, and the industry DB15 standard connector is located on the
MVME712x transition board.
Support functions for the 82596CA are provided by the MC2 chip ASIC.
Refer to the 82596CA user’s guide for detailed programming information.

1-27

Computer Group Literature Center Web Site

Functional Description

Optional SCSI Interface
The MVME172 may provide for mass storage subsystems through the
industry-standard SCSI bus. These subsystems may include hard and
floppy disk drives, streaming tape drives, and other mass storage devices.
The SCSI interface is implemented using the NCR 53C710 SCSI I/O
controller.
Support functions for the 53C710 are provided by the MC2 chip ASIC.
Refer to the 53C710 user’s guide for detailed programming information.
SCSI Termination
It is important that the SCSI bus is properly terminated at both ends.
On the MVME172, sockets are provided for the terminators on the P2
adapter board or the LCP2 adapter board. If the SCSI bus ends at the
adapter board, then termination resistors must be installed on the adapter
board. +5V power to the SCSI bus TERM power line and termination
resistors is provided through a fuse located on the adapter board.

Local Resources
The MVME172 includes many resources for the local processor. These
include tick timers, software-programmable hardware interrupts,
watchdog timer, and local bus timeout.
Programmable Tick Timers
Six 32-bit programmable tick timers with 1 µs resolution are provided, two
in the VMEchip2 and four in the MC2 chip. The tick timers can be
programmed to generate periodic interrupts to the processor. Refer to the
VMEchip2 and MC2 chip in the MVME172 VME Embedded Controller
Programmer’s Reference Guide for detailed programming information.
Watchdog Timer
A watchdog timer function is provided in the VMEchip2 and the MC2
chip. When the watchdog timer is enabled, it must be reset by software
within the programmed time or it times out. The watchdog timer can be

http://www.mcg.mot.com/literature

1-28

Board Level Hardware Description

programmed to generate a SYSRESET signal, local reset signal, or board
fail signal if it times out. Refer to the VMEchip2 and the MC2 chip in the
MVME172 VME Embedded Controller Programmer’s Reference Guide
for programming information.
The watchdog timer logic is duplicated in the VMEchip2 and MC2 chip
ASICs. Because the watchdog timer function in the VMEchip2 is a superset of that function in the MC2 chip (system reset function), the timer in
the VMEchip2 is used in all cases except for the version of the MVME172
which does not include the VMEbus interface (No VMEbus Interface
option).
Software-Programmable Hardware Interrupts
Eight software-programmable hardware interrupts are provided by the
VMEchip2. These interrupts allow software to create a hardware interrupt.
Local Bus Timeout
The MVME172 provides a timeout function in the VMEchip2 and the
MC2 chip for the local bus. When the timer is enabled and a local bus
access times out, a Transfer Error Acknowledge (TEA) signal is sent to the
local bus master. The timeout value is selectable by software for 8 µsec, 64
µsec, 256 µsec, or infinity. The local bus timer does not operate during
VMEbus bound cycles. VMEbus bound cycles are timed by the VMEbus
access timer and the VMEbus global timer.
The access timer logic is duplicated in the VMEchip2 and MC2 chip
ASICs. Because the local bus timer in the VMEchip2 can detect an
offboard access and the MC2 chip local bus timer cannot, the timer in the
VMEchip2 is used in all cases except for the version of the MVME172
which does not include the VMEbus interface (No-VMEbus-Interface
option).

1-29

Computer Group Literature Center Web Site

Functional Description

Local Bus Arbiter
The local bus arbiter implements a fixed priority which is described in the
following table.
Table 1-2. Local Bus Arbitration Priority
Device

Priority

Note

LAN

Highest

IP DMA

...

SCSI

...

VMEbus

Next Lowest

MC68060

Lowest

Timing Performance
This section gives performance information for the MVME172. The
MVME172 is designed to operate at 25 MHz or 32 MHz.
Local Bus to DRAM Cycle Times
The DRAM base address, array size, and device size are programmable.
The DRAM controller assumes an interleaved architecture if the DRAM
size requires eight physical devices (that is, when memory array size is
16MB and DRAM technology is 16 Mbits per device.)
Parity checking and parity exception action is also programmable. The
DRAM array size and device size are initialized in the DRAM Space Size
Register. However, parity may not be supported by the installed DRAM.
Table 1-3. DRAM Performance
Clock Budget

Operating Conditions

4,2,2,2

Non-interleaved, read, 25 MHz

4,1,1,1

Interleaved, read, 25 MHz

http://www.mcg.mot.com/literature

1-30

Board Level Hardware Description

Table 1-3. DRAM Performance
Clock Budget

Operating Conditions

3,2,2,2

Write, 25 MHz

5,3,3,3

Non-interleaved, read, 32 MHz

5,2,2,2

Interleaved, read, 32 MHz

4,2,2,2

Write, 32 MHz

EPROM/Flash Cycle Times
The EPROM/Flash cycle time is programmable from 3 to 10 bus
clocks/byte (4 bytes = 12 to 40). (The actual cycle time may vary
depending on the device speed.) The data transfers are 32 bits wide. Refer
to the MVME172 VME Embedded Controller Programmer’s Reference
Guide.
SCSI Transfers
The MVME172 includes an SCSI mass storage bus interface with DMA
controller. The SCSI DMA controller uses a FIFO buffer to interface the
8-bit SCSI bus to the 32-bit local bus. The FIFO buffer allows the SCSI
DMA controller to efficiently transfer data to the local bus in four
longword bursts. This reduces local bus usage by the SCSI device. Refer
to the MC2 chip Programming Model in the MVME172 VME Embedded
Controller Programmer’s Reference Guide.
The transfer rate of the DMA controller is 44MB/sec at 32 MHz with parity
off and interleaved DRAM and read cycles. Assuming a continuous
transfer rate of 5MB/sec on the SCSI bus, 12% of the local bus bandwidth
is used by transfers from the SCSI bus.
LAN DMA Transfers
The MVME172 includes a LAN interface with DMA controller. The LAN
DMA controller uses a FIFO buffer to interface the serial LAN bus to the
32-bit local bus. The FIFO buffer allows the LAN DMA controller to
efficiently transfer data to the local bus.

1-31

Computer Group Literature Center Web Site

Functional Description

The 82596CA does not execute MC68060 compatible burst cycles,
therefore the LAN DMA controller does not use burst transfers. DRAM
write cycles require 3 clock cycles at 25 MHz or 4 clock cycles at 32 MHz,
and read cycles require 5 clock cycles.
The transfer rate of the LAN DMA controller is 20MB/sec at 25 MHz or
32 MHz. Assuming a continuous transfer rate of 1MB/sec on the LAN bus,
5% of the local bus bandwidth is used by transfers from the LAN bus.

Connectors
The MVME172 has two 96-position DIN connectors: P1 and P2. P1 rows
A, B, C, and P2 row B provide the VMEbus interconnection. P2 rows A
and C provide the connection to the SCSI bus, serial ports, and Ethernet.
The serial ports on the MVME172 are also connected to two 25-pin DB25 female connectors J18 and J25 on the front panel. The four IPs connect
to the MVME172 by four pairs of 50-pin connectors. Four 50-pin
connectors behind the front panel are for external connections to IP
signals. The memory chip mezzanine board is plugged into two 40-pin
connectors.

http://www.mcg.mot.com/literature

1-32

Board Level Hardware Description

Remote Status and Control
The remote status and control connector, J6, is a 20-pin connector located
behind the front panel of the MVME172. It provides system designers with
flexibility in accessing critical indicator and reset functions. When the
MVME172 board is enclosed in a chassis and the front panel is not visible,
this connector allows the RESET, ABORT, and LED functions to be
extended to the control panel of the system, where they are visible.
Alternatively, this allows a system designer to construct a
RESET/ABORT/LED panel that can be located remotely from the
MVME172.

Memory Maps
There are two points of view for memory maps: 1) the mapping of all
resources as viewed by local bus masters (local bus memory map), and 2)
the mapping of onboard resources as viewed by VMEbus Masters
(VMEbus memory map).
The memory and I/O maps which are described in the following tables are
correct for all local bus masters. There is some address translation
capability in the VMEchip2. This allows multiple MVME172s on the
same VMEbus with different virtual local bus maps as viewed by different
VMEbus masters.

Local Bus Memory Map
The local bus memory map is split into different address spaces by the
transfer type (TT) signals. The local resources respond to the normal
access and interrupt acknowledge codes.

1-33

Computer Group Literature Center Web Site

Memory Maps

Normal Address Range
The memory map of devices that respond to the normal address range is
shown in the following tables. The normal address range is defined by the
Transfer Type (TT) signals on the local bus. On the MVME172, Transfer
Types 0, 1, and 2 define the normal address range. Table 1-4 is the entire
map from $00000000 to $FFFFFFFF. Many areas of the map are userprogrammable, and suggested uses are shown in the table. The cache
inhibit function is programmable in the MC68xx060 MMU. The onboard
I/O space must be marked cache inhibit and serialized in its page table.
Table 1-5 further defines the map for the local I/O devices.
Table 1-4. Local Bus Memory Map
Address
Range

Devices
Accessed

Port
Width

Size

Software Note(s)
Cache
Inhibit

Programmable

DRAM on board

D32

4MB-16MB

Programmable

SRAM

D32

128KB-2MB

Programmable

VMEbus A32/A24

D32/D16

Programmable

IP a Memory

D32-D8

64KB-8MB

2, 4

Programmable

IP b Memory

D32-D8

64KB-8MB

2, 4

Programmable

IP c Memory

D32-D8

64KB-8MB

2, 4

Programmable

IP d Memory

D32-D8

64KB-8MB

2, 4

$FF800000-$FF9FFFFF

Flash/PROM

D32

2MB

1, 5

$FFA00000-$FFBFFFFF

PROM/Flash

D32

2MB

$FFC00000-$FFCFFFFF

Not Decoded

1MB

$FFD00000-$FFDFFFFF

Not Decoded

1MB

$FFE00000-$FFE7FFFF

SRAM Default

D32

512KB

$FFE80000-$FFEFFFFF

Not Decoded

512KB

$FFF00000-$FFFEFFFF

Local I/O

D32-D8

878KB

$FFFF0000-$FFFFFFFF

VMEbus A16

D32/D16

64KB

2, 4

http://www.mcg.mot.com/literature

1-34

Board Level Hardware Description

Table 1-4. Local Bus Memory Map (Continued)
Address
Range

Devices
Accessed

Port
Width

Size

Software Note(s)
Cache
Inhibit

Notes
1. Reset enables the decoder for this space of the memory map so that it will decode address spaces
$FF800000 - $FF9FFFFF and $00000000 - $003FFFFF. The decode at 0 must be disabled in the MC2
chip before DRAM is enabled. DRAM is enabled with the DRAM Control Register at address
$FFF42048, bit 24. PROM/Flash is disabled at the low address space with PROM Control Register at
address $FFF42040, bit 20.
2.

This area is user-programmable. The DRAM and SRAM decoder is programmed in the MC2 chip, the
local-to-VMEbus decoders are programmed in the VMEchip2, and the IP memory space is programmed
in the IP2 chip.

Size is approximate.

Cache inhibit depends on devices in area mapped.

The PROM and Flash are sized by the MC2 chip ASIC from an 8-bit private bus to the 32-bit MPU local
bus. Because the device size is less than the allocated memory map size for some entries, the device
contents repeat for those entries.

If jumper GPI3 is installed, the Flash device is accessed. If GPI3 is not installed, the PROM is accessed.

The Flash and PROM are sized by the MC2 chip ASIC from an 8-bit private bus to the 32-bit MPU local
bus. Because the device size is less than the allocated memory map size for some entries, the device
contents repeat for those entries.

If jumper GPI3 is installed, the PROM is accessed. If GPI3 is not installed, the Flash device is accessed.

These areas are not decoded unless one of the programmable decoders are initialized to decode this
space. If they are not decoded, an access to this address range will generate a local bus timeout. The local
bus timer must be enabled.

10. The following table focuses on the Local I/O Devices portion of the local bus Main Memory Map.

1-35

Computer Group Literature Center Web Site

Memory Maps

Table 1-5. Local Bus I/O Devices Memory Map
Address Range

Device

Port
Width

Size

Note(s)

256KB

D32

256B

1, 3

$FFF00000 - $FFF3FFFF

Reserved

$FFF40000 - $FFF400FF

VMEchip2 (LCSR)

$FFF40100 - $FFF401FF

VMEchip2 (GCSR) registers

D32-D8

256B

1, 3

$FFF40200 - $FFF40FFF

Reserved

3.5KB

4, 5

$FFF41000 - $FFF41FFF

Reserved

4KB

$FFF42000 - $FFF42FFF

MC2 chip

D32-D8

4KB

$FFF43000 - $FFF44FFF

Reserved

8KB

$FFF45000 - $FFF45FFF

SCC (Z85230)

4KB

1, 2

$FFF46000 - $FFF46FFF

LAN (82596CA)

D32

4KB

1, 6

$FFF47000 - $FFF47FFF

SCSI (53C710)

D32-D8

4KB

$FFF48000 - $FFF57FFF

Reserved

64KB

$FFF58000 - $FFF5807F

IP2 chip IP a I/O

D16

128B

$FFF58080 - $FFF580FF

IP2 chip IP a ID

D16

128B

$FFF58100 - $FFF5817F

IP2 chip IP b I/O

D16

128B

$FFF58180 - $FFF581FF

IP2 chip IP b ID Read

D16

128B

$FFF58200 - $FFF5827F

IP2 chip IP c I/O

D16

128B

$FFF58280 - $FFF582FF

IP2 chip IP c ID

D16

128B

$FFF58300 - $FFF5837F

IP2 chip IP d I/O

D16

128B

$FFF58380 - $FFF583FF

IP2 chip IP d ID Read

D16

128B

$FFF58400 - $FFF584FF

IP2 chip IP ab I/O

D32-D16

256B

$FFF58500 - $FFF585FF

IP2 chip IP cd I/O

D32-D16

256B

$FFF58600 - $FFF586FF

IP2 chip IP ab I/O repeated

D32-D16

256B

$FFF58700 - $FFF587FF

IP2 chip IP cd I/O repeated

D32-D16

256B

$FFF58800 - $FFF5887F

Reserved

128B

$FFF58880 - $FFF588FF

Reserved

128B

$FFF58900 - $FFF5897F

Reserved

128B

$FFF58980 - $FFF589FF

Reserved

128B

$FFF58A00 - $FFF58A7F

Reserved

128B

$FFF58A80 - $FFF58AFF

Reserved

128B

$FFF58B00 - $FFF58B7F

Reserved

128B

http://www.mcg.mot.com/literature

1-36

Board Level Hardware Description

Table 1-5. Local Bus I/O Devices Memory Map (Continued)
Address Range

Device

Port
Width

Size

Note(s)

$FFF58B80 - $FFF58BFF

Reserved

128B

$FFF58C00 - $FFF58CFF

Reserved

256B

$FFF58D00 - $FFF58DFF

Reserved

256B

$FFF58E00 - $FFF58EFF

Reserved

256B

$FFF58F00 - $FFF58FFF

Reserved

256B

$FFFBC000 - $FFFBC01F

IP2 chip registers

D32-D8

2KB

$FFFBC800 - $FFFBC81F

Reserved

2KB

$FFFBD000 - $FFFBFFFF

Reserved

12KB

$FFFC0000 - $FFFC7FFF

MK48T58 (BBRAM, TOD clock)

D32-D8

32KB

$FFFC8000 - $FFFCBFFF

MK48T58

D32-D8

16KB

1, 7

$FFFCC000 - $FFFCFFFF

MK48T58

D32-D8

16KB

1, 7

$FFFD0000 - $FFFEFFFF

Reserved

128KB

Notes
1. For a complete description of the register bits, refer to the MVME172 VME Embedded Controller
Programmer’s Reference Guide or to the data sheet for the specific chip.
2.

The SCC is an 8-bit device located on an MC2 chip private data bus. Byte access is required.

Writes to the LCSR in the VMEchip2 must be 32 bits. LCSR writes of 8 or 16 bits terminate with a
TEA signal. Writes to the GCSR may be 8, 16 or 32 bits. Reads to the LCSR and GCSR may be 8, 16
or 32 bits. Byte reads should be used to read the interrupt vector.

This area does not return an acknowledge signal. If the local bus timer is enabled, the access times out
and is terminated by a TEA signal.

Size is approximate.

Port commands to the 82596CA must be written as two 16-bit writes: upper word first and lower word
second.

Refer to the Flash and PROM Interface section in the MC2 chip description in the MVME172 VME
Embedded Controller Programmer’s Reference Guide.

1-37

Computer Group Literature Center Web Site

Memory Maps

VMEbus Memory Map
This section describes the mapping of local resources as viewed by
VMEbus masters. Default addresses for the slave, master, and GCSR
address decoders are provided by the ENV command. Refer to Appendix
A.
VMEbus Accesses to the Local Bus
The VMEchip2 includes a user-programmable map decoder for the
VMEbus to local bus interface. The map decoder allows you to program
the starting and ending address and the modifiers the MVME172
responds to.
VMEbus Short I/O Memory Map
The VMEchip2 includes a user-programmable map decoder for the GCSR.
The GCSR map decoder allows you to program the starting address of the
GCSR in the VMEbus short I/O space.

http://www.mcg.mot.com/literature

1-38

Board Level Hardware Description

Software Initialization
Most functions that have been done with switches or jumpers on other
modules are done by setting control registers on the MVME172. At
powerup or reset, the EPROMs that contain the 172Bug debugging
package set up the default values of many of these registers.
Specific programming details may be determined by study of the M68060
Microprocessor User’s Manual. Then check the details of all the
MVME172 onboard registers as given in the MVME172 VME Embedded
Controller Programmer’s Reference Guide.

Multi-MPU Programming Considerations
Good programming practice dictates that only one MPU at a time have
control of the MVME172 control registers. Of particular note are:
❏

Registers that modify the address map

❏

Registers that require two cycles to access

❏

VMEbus interrupt request registers

Local Reset Operation
Local reset (LRST) is a subset of system reset (SRST). Local reset can be
generated five ways:

!
Caution

1-39

❏

Expiration of the watchdog timer

❏

Pressing the front panel RESET switch (if the system controller
function is disabled)

❏

By asserting a bit in the board control register in the GCSR

❏

By SYSRESET*

❏

By powerup reset

The GCSR allows a VMEbus master to reset the local bus.
This feature is very dangerous and should be used with
caution. The local reset feature is a partial system reset, not a

Computer Group Literature Center Web Site

Software Initialization

complete system reset such as powerup reset or SYSRESET*.
When the local bus reset signal is
asserted, a local bus cycle may be aborted. The VMEchip2 is
connected to both the local bus and the VMEbus and if the
aborted cycle is bound for the VMEbus, erratic operation may
result. Communications between the local processor and a
VMEbus master should use interrupts or mailbox locations;
reset should not be used in normal communications. Reset
should be used only when the local processor is halted or the
local bus is hung and reset is the last resort.
Any VMEbus access to the MVME172 while it is in the reset state is
ignored. If a global bus timer is enabled, a bus error is generated.

http://www.mcg.mot.com/literature

1-40

2Hardware Preparation and
Installation

Introduction
This chapter provides unpacking instructions, hardware preparation, and
installation instructions for the MVME172 VME Embedded Controller.
Hardware preparation for the MVME712 series transition modules is
provided in separate manuals. Refer to Related Documentation for more
information.

Unpacking Instructions
Note

If the shipping carton is damaged upon receipt, request
carrier’s agent be present during unpacking and inspection of
equipment.

Unpack the equipment from the shipping carton. Refer to the packing list
and verify that all items are present. Save the packing material for storing
and reshipping of equipment.

Avoid touching areas of integrated circuitry; static discharge
can damage circuits.

Caution

2-1

Hardware Preparation and Installation

Hardware Preparation
To select the desired configuration and ensure proper operation of
MVME172, modifications to certain options may be necessary before you
install the board. The MVME172 provides software control for most
options. Modifications are performed by setting bits in control registers
after the MVME172 has been installed in a system. (For more information
on the MVME172 registers, refer to the MVME172 VME Embedded
Controller Programmer’s Reference Guide listed in Related
Documentation.) Some options cannot be set in software; these are
modified by installing or removing header jumpers or interface modules.
Figure 2-1 illustrates the locations of the switches, jumper headers,
connectors, and LEDs on the MVME172. The MVME172 has been
factory tested and is shipped with the factory jumper settings described in
the following sections. The MVME172 operates with its required and
factory-installed debug monitor, MVME172Bug (172Bug), with these
factory jumper settings.

2-2

Computer Group Literature Center Web Site

Hardware Preparation

Manually configurable items are listed in Table 2-1. Note: Jumper J3 is not
listed as it is for manufacturing purposes only and cannot be configured.
Table 2-1. Jumper-Configurable Options
Option

Factory Default

System Controller Select Header (J1)
IP DMA Snoop Control Header (J2)
IP Bus Clock Header (J14)

2-3

SIMM selection for serial port B configuration (J15)

SIMM06

Clock Select Header (J16) for Serial Port 1/Console
Clock Select Header (J17) for Serial Port 2
IP Bus Strobe Select Header (J19)
SRAM Battery Backup Source Select Header (J22)
EPROM Size Select Header (J23)
Flash Write Protect Header (J24)
General Purpose Readable Jumpers Header (J28)

No jumpers

1-2, 3-4
1-2

No jumpers
1-2
1-3, 2-4
2-3
1-2
1-2, 3-4, 5-6, 7-8, 9-10,
11-12, 13-14, 15-16

System Controller Select Header (J1)
The MVME172 is factory-configured as a VMEbus system controller by a
jumper across J1 pins 1 and 2. If you select the "automatic" system
controller function by moving the jumper to J1 pins 2 and 3, the
MVME172 determines whether it is the system controller by its position
on the bus. If the board is in the first slot from the left, it configures itself
as the system controller. If the MVME172 is not to be system controller
under any circumstances, remove the jumper from J1. When the board is
functioning as system controller, the SCON LED is turned on.

http://www.mcg.mot.com/literature

2-3

Hardware Preparation and Installation

FUSE

SCSI

VME

A1
B1
C1

LAN

SCON

RUN

STAT

FAIL

MVME
172-XXX

DS1
J5

DS2

DS3
J8

DS4

J11

J10

A32
B32
C32

ABORT

RESET

J12

PRIMARY SIDE

J13

J15
1

J14

J18
3

4
2

A1
B1
C1

J17

J16

SERIAL PORT 2

3
1

J26

J27

3
1

J19
1

J21

J20

J23

J25

6
1

J22 J24

J30

A32
B32
C32

XU2

J28

2019 9704

J29

SERIAL PORT 1/ CONSOLE

Figure 2-1. MVME172 Switches, Headers, Connectors, and LEDs
2-4

Computer Group Literature Center Web Site

Hardware Preparation

Note

For MVME172s without the optional VMEbus interface
(i.e., no VMEchip2), the jumper may be installed or removed
without affecting normal operation.

System Controller
(factory configuration)

Auto System Controller

Not System Controller

SIMM Selection (J15)
Port B of the MVME172 Z85230 serial communications controller is
configurable via a serial interface module (SIMM) that is installed at
connector J15 on the MVME172 board. Five serial interface modules are
available:
❏

EIA-232-D (DCE and DTE)

❏

EIA-530 (DCE and DTE)

❏

EIA-485/EIA-422 (DCE or DTE)

You can change Port B from an EIA-232-D to an EIA-530 interface or to
an EIA-485/EIA-422 interface (or vice-versa) by mounting the appropriate
serial interface module. Port B is routed (via the SIMM at J15) to the 25pin DB25 front panel connector marked SERIAL PORT 2.
For the location of SIMM connector J15 on the MVME172, refer to Figure
2-1. Figure 2-2 illustrates the secondary side (bottom) of a serial interface
module, showing the J1 connector which plugs into SIMM connector J15
on the MVME172. Figure 2-3 (sheets 3-6), Figure 2-4, Figure 2-5 (sheets
3 and 4), and Figure 2-6 illustrate the nine configurations available for Port
B.

http://www.mcg.mot.com/literature

2-5

Hardware Preparation and Installation

1
J1

SECONDARY SIDE
1568 9502

Figure 2-2. Serial Interface Module, Connector Side
For the part numbers of the serial interface modules, refer to Table 2-2. The
part numbers are ordinarily printed on the primary side (top) of the
SIMMs, but may be found on the secondary side in some versions.
If you need to replace an existing serial interface module with a SIMM of
another type, go to Removal of Existing SIMM below. If there is no SIMM
on the main board, skip to Installation of New SIMM.
Table 2-2. Serial Interface Module Part Numbers
EIA Standard
EIA-232-D

Configuration

Part Number

Model
Number

DTE

01-W3846B

SIMM05

DCE

01-W3865B

SIMM06

DTE

01-W3868B

SIMM07

DCE

01-W3867B

SIMM08

EIA-485

01-W3002F

SIMM09

or EIA-422

DTE or DCE

EIA-530

Removal of Existing SIMM
1. Each serial interface module is retained by two 4-40 x 3/16-in.
Phillips-head screws in opposite corners. (Exception: SIMM09 is

2-6

Computer Group Literature Center Web Site

Hardware Preparation

retained by one Phillips-head screw in the center of the module.)
Remove the screw(s) and store them in a safe place for later use.
2. Grasp opposite sides of the SIMM and gently lift straight up.

Avoid lifting the SIMM by one side only, as the connector can
be damaged on the SIMM or the main board.

Caution
3. Place the SIMM in a static-safe container for possible reuse.

http://www.mcg.mot.com/literature

2-7

Hardware Preparation and Installation

Installation of New SIMM
1. Observe the orientation of the connector keys on SIMM connector
J1 and MVME172 connector J15. Turn the SIMM so that the keys
line up and place it gently on connector J15, aligning the mounting
hole(s) at the SIMM corners (or center) with the matching
standoff(s) on the MVME172.
2. Gently press the top of the SIMM to seat it on the connector. If the
SIMM does not seat with gentle pressure, recheck the orientation. If
the SIMM connector is oriented incorrectly, the mounting hole(s)
will not line up with the standoff(s).

Do not attempt to force the SIMM on if it is oriented
incorrectly.

Caution
3. Place the one or two 4-40 x 3/16” Phillips-head screw(s) that you
previously removed (or that were supplied with the new SIMM) into
the one center or two opposite-corner mounting hole(s). Screw it or
them into the standoff(s) but do not overtighten it or them.
The signal relationships and signal connections in the various serial
configurations available for ports A and B are illustrated in Figures 2-3, 24, 2-5, and 2-6.

2-8

Computer Group Literature Center Web Site

Hardware Preparation

Clock Select Header (J16) for Serial Port 1/Console

The MVME172 is shipped from the factory with the SERIAL PORT
1/CONSOLE header configured for asynchronous communications (i.e.,
jumpers removed). To select synchronous communications for the SERIAL
PORT 1/CONSOLE connection, install jumpers across pins 1 and 2 and pins
3 and 4.
J16

J16

Internal Clock
(Factory configuration)

External Clock

Clock Select Header (J17) for Serial Port 2
The MVME172 is shipped from the factory with the SERIAL PORT 2 header
configured for asynchronous communications (i.e., jumpers removed). To
select synchronous communications for the SERIAL PORT 2 connection,
install jumpers across pins 1 and 2 and pins 3 and 4.
J17

J17

Internal Clock
(Factory configuration)

http://www.mcg.mot.com/literature

External Clock

2-9

Hardware Preparation and Installation

SRAM Battery Backup Source Select Header (J22)
The MVME172 is factory-configured to use VMEbus +5V Standby power
as a backup power source for the SRAM (i.e., jumpers are installed across
pins 1 and 3 and 2 and 4). To select the onboard battery as the backup
power source, install the jumpers across pins 3 and 5 and 4 and 6.
Note

For MVME172s without optional VMEbus interface (i.e.,
without VMEchip2 ASIC), you must select the onboard
battery for the backup power source.

Removing all jumpers may temporarily disable the SRAM.
Do not remove all jumpers from J22, except for storage.

!
Caution

J22

J22
1

VMEbus +5V STBY
(Factory configuration)

2-10

J22

Backup Power Disabled
(For storage only)

Onboard Battery

Computer Group Literature Center Web Site

Hardware Preparation

IP DMA Snoop Control Header (J2)

J2 defines the state of the snoop control bus when an IP DMA controller is
local bus master. J2 pins 1 and 2 control the Snoop Control signal. Pins 3
and 4 are not used for the MC68xx060.
J2
1

Snoop Inhibited
(Factory configuration)

The following table lists the snoop operations represented by the setting of
J2.
Table 2-3. J2 Snoop Control Encoding
Pins
1-2

Pins
3-4

Snoop Operation

Snoop enabled

Snoop disabled

X = don’t care
Jumper enabled = logic 0
Jumper removed = logic 1

http://www.mcg.mot.com/literature

2-11

Hardware Preparation and Installation

EPROM Size Select Header (J23)
Header J23 selects the EPROM size. The MVME172 is factory-configured
for a 4Mbit EPROM.
J23

J23
1

4Mbit EPROM
(Factory configuration)

8Mbit EPROM

General Purpose Readable Jumpers Header (J28)
Header J28 provides eight readable jumpers. These jumpers are read as a
register (at $FFF4202D) in the MC2chip LCSR (local control/status
register). The bit values are read as a zero when the jumper is installed and
as a one when the jumper is removed.
With the factory-installed 172Bug firmware in place, four jumpers are
user-definable (pins 1-2, 3-4, 5-6, 7-8). If the 172Bug firmware is
removed, seven jumpers are user-definable (pins 1-2, 3- 4, 5-6, 7-8, 11-12,
13-14, 15-16).
Note

2-12

Pins 9-10 (GPI3) are reserved to select either the Flash
memory map (jumper installed) or the EPROM memory map
(jumper removed). They are not user-definable. See Chapter
3 for more information.

Computer Group Literature Center Web Site

Hardware Preparation

In most cases, the MVME172 is shipped from the factory with J28 set to
all zeros (jumpers on all pins). On boards built with the no-VMEbus
option, however, no jumper is installed across pins 9-10.
J28

172BUG INSTALLED

USER CODE INSTALLED

USER-DEFINABLE

GPI6

USER-DEFINABLE

GPI5

USER-DEFINABLE

GPI4

USER-DEFINABLE

IN=FLASH; OUT=EPROM

GPI2

REFER TO 172BUG MANUAL

USER-DEFINABLE

GPI1

REFER TO 172BUG MANUAL

USER-DEFINABLE

REFER TO 172BUG MANUAL

USER-DEFINABLE

GPI7

GPI3

GPI0

Flash Selected (factory configuration except on non-VMEbus models)

Flash Write Protect Header (J24)
When the Flash write protect jumper is installed (factory configuration),
Flash memory can be written to via the normal software routines. When
the jumper is removed, Flash memory cannot be written to.
J24
2
1
Flash Write Protect
(Factory configuration)

http://www.mcg.mot.com/literature

2-13

Hardware Preparation and Installation

IP Bus Clock Header (J14)
This header selects the speed of the IP bus clock. The IP bus clock speed
may be 8MHz or it may be set synchronous to the processor bus clock.
If the jumper is installed between J14 pins 2 and 3, the IP bus clock is the
same as the MC68060 bus clock, that is 32MHz (MC68LC060) or 30MHz
(MC68060) allowing the IP module to run with a 32MHz MPU. All IP
ports operate at the same speed.

!
Caution

The IP32 CSR bit (IP2 chip, register at offset $1D, bit 0) must
be set to correspond to the jumper setting. This is cleared (0)
for 8MHz, or set (1) for 30 or 32MHz. If the jumper and the
bit are not configured the same, the board may not run
properly.

J14
3

Bus Clock = 8MHz
(Factory configuration)

2-14

J14

Bus Clock = Proc. Bus Clock
(from MPU Bus Clock)

Computer Group Literature Center Web Site

Hardware Preparation

IP Bus Strobe Select Header (J19)

Some IP bus implementations make use of the Strobe∗ signal (pin 46) as
an input to the IP modules from the IP2 chip. Other IP interfaces require
that the strobe be disconnected.
With a jumper installed between J19 pins 1 and 2, a programmable
frequency source is connected to the Strobe∗ signal on the IP bus (for
details, refer to the IP2 chip programming model in the MVME172
Programmer’s Reference Guide).
If the jumper is removed from J19, the strobe line is available for a
sideband type of messaging between IP modules. The Strobe∗ signal is not
connected to any active devices on the board, but it may be connected to a
pull-up resistor.
J19

J19

IP Strobe disconnected

http://www.mcg.mot.com/literature

IP Strobe connected
(Factory configuration)

2-15

Hardware Preparation and Installation

Installation Instructions
The following sections discuss the installation of IndustryPacks (IPs) on
the MVME172, the installation of the MVME172 into a VME chassis, and
the system considerations relevant to the installation. Before installing
IndustryPacks, ensure that the serial ports and all header jumpers are
configured as desired.

IP Installation on the MVME172
Up to four IndustryPack (IP) modules may be installed on the MVME172.
Install the IPs on the MVME172 as follows:
1. Each IP has two 50-pin connectors that plug into two corresponding
50-pin connectors on the MVME172: J4/J5, J10/J11, J20/J21,
J29/J30. See Figure 2-1 on page 2-4 for the MVME172 connector
locations.
– Orient the IP(s) so that the tapered connector shells mate
properly. Plug IP_a into connectors J4 and J5; plug IP_b into J10
and J11. Plug IP_c into J20 and J21; plug IP_d into J29 and J30.
If a double-sized IP is used, plug IP_ab into J4, J5, J10, and J11;
plug IP_cd into J20, J21, J29, and J30.
2. Four additional 50-pin connectors (J7, J8, J26, and J27) are
provided behind the MVME172 front panel for external cabling
connections to the IP modules. There is a one-to-one
correspondence between the signals on the cabling connectors and
the signals on the associated IP connectors (i.e., J8 has the same
IP_a signals as J4; J7 has the same IP_b signals as J10; J27 has the
same IP_c signals as J20; and J26 has the same IP_d signals as J29.
– Connect user-supplied 50-pin cables to J7, J8, J26, and J27 as
needed. Because of the varying requirements for each different
kind of IP, Motorola does not supply these cables.
– Bring the IP cables out the narrow slots in the MVME172 front
panel and attach them to the appropriate external equipment,
depending on the nature of the particular IP(s).

2-16

Computer Group Literature Center Web Site

Installation Instructions

MVME172 Module Installation

With EPROM, IndustryPack, and SIMMs installed and headers properly
configured, proceed as follows to install the MVME172 in the VME
chassis:
1. Turn all equipment power OFF and disconnect the power cable
from the AC power source.

Inserting or removing modules while power is applied could
result in damage to module components.

Caution

!
Warning

Dangerous voltages, capable of causing death, are present in
this equipment. Use extreme caution when handling, testing,
and adjusting.
2. Remove the chassis cover as instructed in the user’s manual for the
equipment.
3. Remove the filler panel from the card slot where you are going to
install the MVME172.
– If you intend to use the MVME172 as system controller, it must
occupy the leftmost card slot (slot 1). The system controller must
be in slot 1 to correctly initiate the bus-grant daisy-chain and to
ensure proper operation of the IACK daisy-chain driver.
– If you do not intend to use the MVME172 as system controller,
it can occupy any unused double-height card slot.
4. Slide the MVME172 into the selected card slot. Be sure the module
is seated properly in the P1 and P2 connectors on the backplane. Do
not damage or bend connector pins.
5. Secure the MVME172 in the chassis with the screws provided,
making good contact with the transverse mounting rails to minimize
RF emissions.
6. Install the MVME712 series transition module in the front or the
rear of the VME chassis. (To install an MVME712M, which has a

http://www.mcg.mot.com/literature

2-17

Hardware Preparation and Installation

double-wide front panel, you may need to shift other modules in the
chassis.)

7. On the chassis backplane, remove the INTERRUPT ACKNOWLEDGE
(IACK) and BUS GRANT (BG) jumpers from the header for the card
slot occupied by the MVME172.
Note

Some VME backplanes (e.g., those used in Motorola
"Modular Chassis" systems) have an autojumpering feature
for automatic propagation of the IACK and BG signals. Step
7 does not apply to such backplane designs.

8. Connect the P2 Adapter Board or LCP2 Adapter Board and cable(s)
to MVME172 backplane connector P2. This provides a connection
point for terminals or other peripherals at the EIA-232-D serial
ports, SCSI ports, and LAN Ethernet port. For information on
installing the P2 or LCP2 Adapter Board and the MVME712 series
transition module(s), refer to the manuals listed in Related
Documentation (the MVME172 VME Embedded Controller
Programmer’s Reference Guide provides some connection
diagrams.)

2-18

Computer Group Literature Center Web Site

Installation Instructions

Note

If you intend to use the MVME172 with Port B in an EIA530 configuration or an EIA-485/EIA-422 configuration, do
not install the P2 or LCP2 Adapter Board and the MVME712
series transition module. They are incompatible with the
EIA-530 interface and the EIA-485/EIA-422 interface. Refer
to MVME172 Serial Port 2 for more information.

9. Connect the appropriate cable(s) to the panel connectors for the
serial ports, SCSI port, and LAN Ethernet port.
– Note that some cables are not provided with the MVME712
series module and must be made or purchased by the user.
(Motorola recommends shielded cable for all peripheral
connections to minimize radiation.)
10. Connect the peripheral(s) to the cable(s). Appendix A supplies
detailed information on the EIA-232-D, EIA-530, and EIA485/EIA-422 signals supported. Appendix B describes the SCSI
(Small Computer System Interface) I/O bus connections. Appendix
C describes the Ethernet LAN (Local Area Network) port
connections.
11. Install any other required VMEmodules in the system.
12. Replace the chassis cover.
13. Connect the power cable to the AC power source and turn the
equipment power ON.
14. Startup information is located in Chapter 3.

System Considerations
The MVME172 draws power from VMEbus backplane connectors P1 and
P2. P2 is also used for the upper 16 bits of data in 32-bit transfers, and for
the upper 8 address lines used in extended addressing mode. The
MVME172 may not function properly without its main board connected to
VMEbus backplane connectors P1 and P2.

http://www.mcg.mot.com/literature

2-19

Hardware Preparation and Installation

Whether the MVME172 operates as VMEbus master or VMEbus slave, it
is configured for 32 bits of address and 32 bits of data (A32/D32).
However, it handles A16 or A24 devices in the address ranges indicated in
Chapter 1. D8 and/or D16 devices in the system must be handled by the
MC68060/MC68LC060 software. Refer to the memory maps in the
MVME172 VME Embedded Controller Programmer’s Reference Guide.)

The MVME172 contains shared onboard DRAM whose base address is
software-selectable. Both the onboard processor and offboard VMEbus
devices see this local DRAM at base physical address $00000000, as
programmed by the 172Bug firmware. This may be changed via software
to any other base address. Refer to the MVME172 VME Embedded
Controller Programmer’s Reference Guide for more information.
If the MVME172 tries to access offboard resources in a nonexistent
location and is not system controller, and if the system does not have a
global bus timeout, the MVME172 waits forever for the VMEbus cycle to
complete. This will cause the system to lock up. There is only one situation
in which the system might lack this global bus timeout: when the
MVME172 is not the system controller and there is no global bus timeout
elsewhere in the system.
Multiple MVME172s may be installed in a single VME chassis. In
general, hardware multiprocessor features are supported.
Note

If you are installing multiple MVME172s in an MVME945
chassis, do not install an MVME172 in slot 12. The height of
the IP modules may cause clearance difficulties in that slot
position.

Other MPUs on the VMEbus can interrupt, disable, communicate with,
and determine the operational status of the processor(s). One register of the
GCSR (global control/status register) set includes four bits that function as
location monitors to allow one MVME172 processor to broadcast a signal
to any other MVME172 processors. All eight registers are accessible from
any local processor as well as from the VMEbus.

2-20

Computer Group Literature Center Web Site

Installation Instructions

The following circuits are protected by solid-state fuses that reset during
overload conditions: remote reset connector, IndustryPack +5V, and
IndustryPack ±12V.
The FUSE LED illuminates to indicate that all fuses are functioning
correctly. If a fuse opens, power must be removed for several minutes to
allow the fuse to reset.
The MVME172 provides +12 Vdc power to the Ethernet transceiver
interface through a solid-state fuse (F2). The FUSE LED lights to indicate
that +12 Vdc is available. When the MVME712M module is used, the
yellow DS1 LED on the MVME712M illuminates when LAN power is
available, which indicates that the fuse is good. If the Ethernet transceiver
fails to operate, check fuse F2.
The MVME172 provides SCSI terminator power through a 1A fuse (F1)
located on the P2 Adapter Board or LCP2 Adapter Board. If the fuse is
blown, the SCSI device(s) may function erratically or not at all. When the
P2 Adapter Board is used with an MVME712M and the SCSI bus is
connected to the MVME712M, the green DS2 LED on the MVME712M
front panel illuminates when SCSI terminator power is available. If the
green DS2 LED flickers during SCSI bus operation, check P2 Adapter
Board fuse F1.
The following figures illustrate the signal relationships and signal
connections in the various serial configurations available for ports A and
B.

http://www.mcg.mot.com/literature

2-21

Hardware Preparation and Installation

2
712M TRANSITION
MODULE
PORT 2
DB25

TO MODEM
J27
TXD
RXD
RTS
CTS
DTR
DCD

P2-C27

TXD2

TXD

P2-C28

RXD2

RXD

P2-C29

RTS2

RTS

P2-C30

CTS2

CTS

P2-C31

DTR2

DTR

P2-C32

DCD2

DCD
DSR

TXC

CABLE
TO TERMINAL
J16

PIN 2
PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6
PIN 15

RXC
PIN 17
TXCO

+12V

PIN 24
PIN 7

1.5K

MVME 712M EIA- 232-D DTE CONFIGURATION (TO MODEM)

FRONT PANEL
DB25

Z85230
A PORT
D

TXD

RXD

RTS

CTS

DTR

DCD

TXC

TXD
RXD
RTS
CTS
DTR
DCD
DSR
TXC

RXC

D
3
1

4
2

D
R

RXC
TXCO

PIN 2

PORT 1

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME162 EIA-232-D DCE CONFIGURATION
(TO TERMINAL)

PIN 15
PIN 17
PIN 24

J26
PIN 7

10970.01 (1-6) 9704

Figure 2-3. MVME172 EIA-232-D Connections, MVME712M (Sheet 1 of 6)

2-22

Computer Group Literature Center Web Site

Installation Instructions

2
712M TRANSITION
MODULE
PORT 2
DB25

TO MODEM
J27
TXD
RXD
RTS
CTS
DTR
DCD

P2-C27

TXD2

TXD

P2-C28

RXD2

RXD

P2-C29

RTS2

RTS

P2-C30

CTS2

CTS

P2-C31

DTR2

DTR

P2-C32

DCD2

DCD
DSR

TXC

CABLE
TO TERMINAL
J16

PIN 2
PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6
PIN 15

RXC
PIN 17
TXCO

+12V

PIN 24
PIN 7

1.5K

MVME 712M EIA- 232-D DTE CONFIGURATION (TO MODEM)

FRONT PANEL
DB25

Z85230
A PORT
D

TXD

RXD

RTS

CTS

DTR

DCD

TXC

TXD
RXD
RTS
CTS
DTR
DCD
DSR
TXC

RXC

D
3
1

4
2

D
R

RXC
TXCO

PIN 2

PORT 1

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME162 EIA-232-D DCE CONFIGURATION
(TO TERMINAL)

PIN 15
PIN 17
PIN 24

J26
PIN 7

10970.01 (1-6) 9704

Figure 2-3. MVME172 EIA-232-D Connections, MVME712M (Sheet 2 of 6)

http://www.mcg.mot.com/literature

2-23

Hardware Preparation and Installation

2
712M TRANSITION
MODULE
PORT 4
TO MODEM
J19
TXD
RXD
RTS
CTS
DTR
DCD

DB25

P2-A25

TXD4

TXD

P2-A26

RXD4

RXD

P2-A27

RTS4

RTS

P2-A29

CTS4

CTS

P2-A30

DTR4

DTR

P2-A31

DCD4

DCD
DSR

RTXC

P2-A32

TRXC P2-A28

RTXC4

TXC

TRXC4

RXC

TO TERMINAL
J18

CABLE

PIN 2
PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6
PIN 15
PIN 17

TXCO

PIN 24
PIN 7

+12V

1.5K

J15

MVME712M EIA-232-D DTE CONFIGURATION (TO MODEM)

NOTE: WITH DTE MODULE, THE RECEIVE CLOCK OF 85230 ON B INTERFACE
MUST BE PROGRAMMED AS INPUT TO PREVENT BUFFER CONTENTION

SIM05
EIA-232-D DTE

Z85230

FRONT PANEL
DB25

B PORT
TXD

RXD

RTS

CTS

DTR

DCD

R
NC

TXC
RXC

TXD

RXD

J17

DSR
TXC

R
+5V

R
D

RXC
TXCO

PIN 2

PORT 2

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME 162 EIA-232-D DTE CONFIGURATION
(TO MODEM)

PIN 15
PIN 17
PIN 24
PIN 7

10970.01 (3-6) 9704

Figure 2-3. MVME172 EIA-232-D Connections, MVME712M (Sheet 3 of 6)

2-24

Computer Group Literature Center Web Site

Installation Instructions

2
712M TRANSITION
MODULE
PORT 4
TO MODEM
J19
TXD
RXD
RTS
CTS
DTR
DCD

DB25

P2-A25

TXD4

TXD

P2-A26

RXD4

RXD

P2-A27

RTS4

RTS

P2-A29

CTS4

CTS

P2-A30

DTR4

DTR

P2-A31

DCD4

DCD
DSR

RTXC

P2-A32

TRXC P2-A28

RTXC4

TXC

TRXC4

RXC

TO TERMINAL
J18

PIN 2
PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6
PIN 15
PIN 17

TXCO

CABLE

PIN 24
PIN 7

+12V

1.5K

J15

MVME712M EIA-232-D DCE CONFIGURATION (TO TERMINAL)

SIM06
EIA-232-D DCE

Z85230

FRONT PANEL
DB25

B PORT
TXD

RXD

RTS

CTS

DTR

DCD

R
D

TXC
RXC

TXD

RXD

J17

+5V

DSR
TXC

D
D
R

RXC
TXCO

PIN 2

PORT 2

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME 162 EIA-232-D DCE CONFIGURATION
(TO TERMINAL)

PIN 15
PIN 17
PIN 24
PIN 7

10970.01 (4-6) 9704

Figure 2-3. MVME172 EIA-232-D Connections, MVME712M (Sheet 4 of 6)

http://www.mcg.mot.com/literature

2-25

Hardware Preparation and Installation

2
712M TRANSITION
MODULE
PORT 4

TXD
RXD
RTS
CTS
DTR
DCD

TO MODEM
J19

DB25
TXD

P2-A25

TXD4

P2-A26

RXD4

RXD

P2-A27

RTS4

RTS

P2-A29

CTS4

CTS

P2-A30

DTR4

DTR

P2-A31

DCD4

DCD
DSR

RTXC

P2-A32

TRXC P2-A28

TXC

RTXC4
TO TERMINAL
J18

TRXC4

CABLE

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6
PIN 15

RXC
PIN 17
TXCO

PIN 2

PIN 24
PIN 7

+12V

1.5K

J15

MVME712M EIA-232-D CONFIGURATION (TO TERMINAL)

NOTES:
1. WITH DTE MODULE AND MVME 712 JUMPERED AS TO TERMINAL,
THE CLOCKS (TXC AND RXC) ARE THE WRONG DIRECTION.
THE CLOCKS ARE BOTH INPUTS. THEY SHOULD BOTH BE OUTPUTS.
2. WITH DTE MODULE, THE RECEIVE CLOCK OF 85230 ON B INTERFACE
MUST BE PROGRAMMED AS INPUT TO PREVENT BUFFER CONTENTION.
SIM05
EIA-232-D DTE

Z85230

FRONT PANEL
DB25

B PORT
TXD

RXD

RTS

CTS

DTR

DCD

R
NC

TXC
RXC

TXD

RXD

J17

DSR
TXC

R
+5V

R
D

RXC
TXCO

PIN 2

PORT 2

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME 162 EIA-232-D DTE CONFIGURATION
(TO MODEM)

PIN 15
PIN 17
PIN 24
PIN 7

10970.01 (5-6) 9704

Figure 2-3. MVME172 EIA-232-D Connections, MVME712M (Sheet 5 of 6)

2-26

Computer Group Literature Center Web Site

Installation Instructions

2
712M TRANSITION
MODULE
PORT 4

TXD
RXD
RTS
CTS
DTR
DCD

DB25

TO MODEM
J19

TXD

P2-A25

TXD4

P2-A26

RXD4

RXD

P2-A27

RTS4

RTS

P2-A29

CTS4

CTS

P2-A30

DTR4

DTR

P2-A31

DCD4

DCD
DSR

RTXC

P2-A32

TRXC P2-A28

TXC

RTXC4
TO TERMINAL
J18

TRXC4

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6
PIN 15

RXC
PIN 17
TXCO

PIN 2

PIN 24

CABLE
PIN 7

+12V

1.5K

J15

MVME712M EIA-232-D DTE CONFIGURATION (TO MODEM)

NOTE:
WITH DCE MODULE AND MVME 712 JUMPERED AS TO TERMINAL,
THE CLOCKS (TXC AND RXC) ARE THE WRONG DIRECTION.
THE CLOCKS ARE BOTH OUTPUTS. THEY SHOULD BOTH BE INPUTS.

SIM06
EIA-232-D DCE

Z85230

FRONT PANEL
DB25

B PORT
TXD

RXD

RTS

CTS

DTR

DCD

TXC
RXC

TXD

RXD

J17

+5V

D
D
R

DSR
TXC
RXC
TXCO

PIN 2

PORT 2

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME 162 EIA-232-D DCE CONFIGURATION
(TO TERMINAL)

PIN 15
PIN 17
PIN 24
PIN 7

10970.01 (6-6) 9704

Figure 2-3. MVME172 EIA-232-D Connections, MVME712M (Sheet 6 of 6)

http://www.mcg.mot.com/literature

2-27

Hardware Preparation and Installation

P2 CONNECTOR

MVME 172 EIA-530 DTE CONFIGURATION
(TO MODEM)

TXD_B
TXD_A
RXD_B
RXD_A
RTS_B
RTS_A
CTS_B
CTS_A
DTR_B
DTR_A
DCD_B
DCD_A
DSR_B
DSR_A
TXC_B
TXC_A
RXC_B
RXC_A
TXCO_B
TXCO_A
TM_A
LL_A
RL_A

SIM07
EIA-530 DTE

Z85230

TXD

RTS*
RTS

RTS_B
RTS_A

CTS*

CTS_B
CTS_A

DTR_B
DTR_A

DTR*

DCD*

TXC
RXC

RXD_B
RXD_A

RXD

NC
3

+5V

DCD_B
DCD_A

DSR_B
DSR_A

TXC_B
TXC_A
RXC_B
RXC_A

R
J27

TXCO_B
TXCO_A

NC
+5V
D
+5V

P2-A26
P2-C19
P2-A27
P2-C26
P2-A29
P2-A23
P2-A30
P2-C22
P2-A31
P2-A22
P2-A20
P2-C24
P2-A32
P2-C21
P2-A28
P2-C23
P2-A24
P2-C25
P2-C20
P2-A21

PIN 1
TXD_B
TXD_A

P2-A25
P2-A19

FRONT PANEL
DB 25

B PORT

P2-C18

TM_A
LL_A

RL_A

PIN 14
PIN 2

PORT
2

PIN 16
PIN 3
PIN 19
PIN 4
PIN 13
PIN 5
PIN 23
PIN 20
PIN 10
PIN 8
PIN 22
PIN 6
PIN 12
PIN 15
PIN 9
PIN 17
PIN 11
PIN 24
PIN 25
PIN 18

PIN 21
PIN 7

10971.01 (1-2) 9704

Figure 2-4. MVME172 EIA-530 Connections (Sheet 1 of 2)

2-28

Computer Group Literature Center Web Site

Installation Instructions

2
P2 CONNECTOR
TXD_B
TXD_A
RXD_B
RXD_A
RTS_B
RTS_A
CTS_B
CTS_A
DTR_B
DTR_A
DCD_B
DCD_A
DSR_B
DSR_A
TXC_B
TXC_A

MVME 172 EIA-530 DCE CONFIGURATION
(TO TERMINAL)

RXC_B
RXC_A
TXCO_B
TXCO_A
TM_A
LL_A
RL_A

SIM08
EIA-530 DCE

Z85230

TXD

RXD_B
RXD_A

RXD

RTS*

RTS_B
RTS_A

CTS*

CTS_B
CTS_A

DTR*

DTR_B
DTR_A

DCD_B
DCD_A

DCD*

TXC
RXC

DSR_B
DSR_A

TXC_B
TXC_A

RXC_B
RXC_A

TXCO_B
TXCO_A

4
+5V

2
J27

+5V

TM_A

D
NC
NC

P2-A26
P2-C19
P2-A27
P2-C26
P2-A29
P2-A23
P2-A30
P2-C22
P2-A31
P2-A22
P2-A20
P2-C24
P2-A32
P2-C21
P2-A28
P2-C23
P2-A24
P2-C25
P2-C20
P2-A21

PIN 1
TXD_B
TXD_A

P2-A25
P2-A19

FRONT PANEL
DB 25

B PORT

P2-C18

LL_A
RL_A

PIN 14
PIN 2

PORT
2

PIN 16
PIN 3
PIN 19
PIN 4
PIN 13
PIN 5
PIN 23
PIN 20
PIN 10
PIN 8
PIN 22
PIN 6
PIN 12
PIN 15
PIN 9
PIN 17
PIN 11
PIN 24
PIN 25
PIN 18
PIN 21

PIN 7

10971.01 (2-2) 9704

Figure 2-4. MVME172 EIA-530 Connections (Sheet 2 of 2)

http://www.mcg.mot.com/literature

2-29

Hardware Preparation and Installation

2
712A/AM/12/13
TRANSITION MODULE
PORT 2

DCE
1.5K

DTE
J9

1.5K

+12V
SERIAL PORT 2
J26
TXD
RXD
RTS
CTS
DTR
DCD

DB9

P2-C27

TXD2

TXD

P2-C28

RXD2

RXD

P2-C29

RTS2

RTS

P2-C30

CTS2

CTS

P2-C31

DTR2

DTR

P2-C32

DCD2

DCD

DSR

CABLE

MODEM PORT 2
J27

PIN 3
PIN 2
PIN 7
PIN 8
PIN 4
PIN 1
PIN 6

MTXD
RJ26
MRXD
MCTS
MDTR

MODEM
(712AM/712-13
ONLY)

TIP
RING

PIN 2
PIN 3

MDCD

MVME 712A/AM/-12/-13 PORT 2 CONFIGURED AS EIA-232-D SERIAL PORT

NOTES:
1. SERIAL PORT 2 IS HARD-WIRED DTE. USE NULL MODEM CABLE FOR DCE.
2. TO ATTACH TERMINAL, CONNECT J9 TO "DCE" FOR DSR SIGNAL.

FRONT PANEL
DB25

Z85230
A PORT
D

TXD

RXD

RTS

CTS

DTR

DCD

TXC

TXD
RXD
RTS
CTS
DTR
DCD
DSR
TXC

RXC

D
3
1

4
2

D
R

RXC
TXCO

PIN 2

PORT 1

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME172 EIA-232-D DCE CONFIGURATION
(TO TERMINAL)

PIN 15
PIN 17
PIN 24

J26
PIN 7

11020.01 9406 (1-4)

Figure 2-5. MVME172 EIA-232-D Connections, MVME712A/AM/-12/-13 (Sheet
1 of 4)

2-30

Computer Group Literature Center Web Site

Installation Instructions

712AM/13
TRANSITION MODULE
PORT 2

DCE
DTE
1.5K
J9
1.5K
+12V
SERIAL PORT 2
J26
TXD
RXD
RTS
CTS
DTR
DCD

DB9

P2-C27

TXD2

TXD

P2-C28

RXD2

RXD

P2-C29

RTS2

RTS

P2-C30

CTS2

CTS

P2-C31

DTR2

DTR

P2-C32

DCD2

DCD
DSR

CABLE

PIN 3
PIN 2
PIN 7
PIN 8
PIN 4
PIN 1
PIN 6

MODEM PORT 2
J27
MTXD
RJ26

MRXD
MCTS
MDTR

TIP

MODEM
(712AM/712-13
ONLY)

RING

PIN 2
PIN 3

MDCD

MVME 712AM/-13 PORT 2 CONFIGURED AS MODEM

NOTE:
USING SERIAL PORT 2 AS A MODEM PORT REQUIRES CONNECTION TO
+5/+12/-12Vdc BACKPLANE POWER, A DATA CABLE AT THE DB9 CONNECTOR,
AND A TELCO CABLE AT THE RJ26 CONNECTOR. REFER TO THE USER’S
MANUAL FOR THIS MODULE (MVME712A) FOR SETUP INSTRUCTIONS.

FRONT PANEL
DB25

Z85230
A PORT
D

TXD

RXD

RTS

CTS

DTR

DCD
TXC

RXC

TXD
RXD
RTS
CTS
DTR
DCD
DSR
TXC

3
1

4
2

D
R

RXC
TXCO

PIN 2

PORT 1

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME172 EIA-232-D DCE CONFIGURATION
(TO TERMINAL)

PIN 15
PIN 17
PIN 24

J26
PIN 7

11020.01 9406 (2-4)

Figure 2-5. MVME172 EIA-232-D Connections, MVME712A/AM/-12/-13 (Sheet
2 of 4)

http://www.mcg.mot.com/literature

2-31

Hardware Preparation and Installation

2
712A/AM/-12/-13
TRANSITION MODULE
PORT 4

DCE
1.5K

DTE
J14

1.5K

+12V

DB9
TXD
RXD
RTS
CTS
DTR
DCD

P2-A25

TXD4

TXD

P2-A26

RXD4

RXD

P2-A27

RTS4

RTS

P2-A29

CTS4

CTS

P2-A30

DTR4

DTR

P2-A31

DCD4

DCD
DSR

TXC

P2-A32

RTXC4

RXC P2-A28

TRXC4

PIN 3
PIN 2
PIN 7
PIN 8
PIN 4
PIN 1
PIN 6

NC
NC

CABLE
MVME 712A/AM/-12/-13 PORT 4 (DTE)

NOTES:
1. SERIAL PORT 4 IS HARD-WIRED DTE. USE NULL MODEM CABLE FOR DCE.
2. TO ATTACH TERMINAL, CONNECT J14 TO "DCE" FOR DSR SIGNAL.

SIM05
EIA-232-D DTE

Z85230

FRONT PANEL
DB25

B PORT
TXD

RXD

RTS

CTS

DTR

DCD

R
NC

TXC
RXC

TXD

RXD

J27

DSR
TXC

R
+5V

R
D

RXC
TXCO

PIN 2

PORT 2

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME 172 EIA-232 DTE CONFIGURATION
(TO MODEM)

PIN 15
PIN 17
PIN 24
PIN 7

11020.01 9406 (3-4)

Figure 2-5. MVME172 EIA-232-D Connections, MVME712A/AM/-12/-13 (Sheet
3 of 4)

2-32

Computer Group Literature Center Web Site

Installation Instructions

2
712A/AM/-12/-13
TRANSITION MODULE
PORT 4

DCE
1.5K

J14

DTE
1.5K

+12V

DB9
TXD
RXD
RTS
CTS
DTR
DCD

P2-A25

TXD4

TXD

P2-A26

RXD4

RXD

P2-A27

RTS4

RTS

P2-A29

CTS4

CTS

P2-A30

DTR4

DTR

P2-A31

DCD4

DCD
DSR

TXC

P2-A32

RTXC4

RXC P2-A28

TRXC4

PIN 3
PIN 2
PIN 7
PIN 8
PIN 4
PIN 1
PIN 6

NC
NC

CABLE
MVME 712A/AM/-12/-13 PORT 4 (DTE)

NOTES:
1. SERIAL PORT 4 IS HARD-WIRED DTE. USE NULL MODEM CABLE FOR DCE.
2. TO ATTACH TERMINAL, CONNECT J14 TO "DCE" FOR DSR SIGNAL.

SIM06
EIA-232-D DCE

Z85230

FRONT PANEL
DB25

B PORT
TXD

RXD

RTS

CTS

DTR

DCD

R
D

TXC
RXC

TXD

RXD

J27

+5V

DSR
TXC

D
D
R

RXC
TXCO

PIN 2

PORT 2

PIN 3
PIN 4
PIN 5
PIN 20
PIN 8
PIN 6

MVME 172 EIA-232 DCE CONFIGURATION
(TO TERMINAL)

PIN 15
PIN 17
PIN 24
PIN 7

11020.01 9406 (4-4)

Figure 2-5. MVME172 EIA-232-D Connections, MVME712A/AM/-12/-13 (Sheet
4 of 4)

http://www.mcg.mot.com/literature

2-33

Hardware Preparation and Installation

P2 CONNECTOR
TXD_B

P2-C18

TXD_A
P2-A25
RXD_B

P2-A19

RXD_A

P2-A26

TXC_B

P2-C24

TXC_A

P2-A32

RXC_B

P2-C21

RXC_A

SIMM09
EIA-485/EIA-422

FRONT PANEL
DB-25

Z85230
B PORT

1
2

TXD

P2-A28

TXD_B
PIN 14

TXD_A

PORT
2

PIN 2

RXD

RXD_B
PIN 16
D

RXD_A
PIN 3

R
3
4

RXC

TXC_B

TXC_A

PIN 12
PIN 15

TXC

RXC_B
PIN 9
D

RXC_A
PIN 17

DTR
FO2

DRIVER/RECEIVER
CONTROLLER

RTS

.
. . REFER TO INSTALLATION MANUAL

1566 9501

Figure 2-6. MVME172 EIA-485/EIA-422 Connections

2-34

Computer Group Literature Center Web Site

3Debugger General Information

Overview of M68000 Firmware
The firmware for the M68000-based (68K) series of board and system
level products has a common genealogy, deriving from the debugger
firmware currently used on all Motorola M68000-based CPU modules.
The M68000 firmware family provides a high degree of functionality and
user friendliness, and yet stresses portability and ease of maintenance. The
M68000 firmware implementation on the MVME172 MC68060-based or
MC68LC060-based Embedded Controller is known as the
MVME172Bug, or 172Bug. It includes diagnostics for testing and
configuring IndustryPack modules.

Description of 172Bug
The 172Bug package, MVME172Bug, is a powerful evaluation and
debugging tool for systems built around the MVME172 CISC-based
microcomputers. Facilities are available for loading and executing user
programs under complete operator control for system evaluation. 172Bug
includes commands for display and modification of memory, breakpoint
and tracing capabilities, a powerful assembler/disassembler useful for
patching programs, and a power-up self test which verifies the integrity of
the system. Various 172Bug routines that handle I/O, data conversion, and
string functions are available to user programs through the TRAP #15
system calls.

3-1

Debugger General Information

172Bug consists of three parts:
❏

A command-driven user-interactive software debugger, described
in Chapter 4 and hereafter referred to as "the debugger" or
"172Bug".

❏

A command-driven diagnostic package for the MVME172
hardware, described in the MVME172Bug Diagnostics Manual, and
hereafter referred to as "the diagnostics".

❏

A user interface which accepts commands from the system console
terminal.

When using 172Bug, you operate out of either the debugger directory or
the diagnostic directory. If you are in the debugger directory, the debugger
prompt "172-Bug>" is displayed and you have all of the debugger
commands at your disposal. If you are in the diagnostic directory, the
diagnostic prompt
"172-Diag>" is displayed and you have all of the diagnostic commands at
your disposal as well as all of the debugger commands. You may switch
between directories by using the Switch Directories (SD) command, or
may examine the commands in the particular directory that you are
currently in by using the Help (HE) command.
Because 172Bug is command-driven, it performs its various operations in
response to user commands entered at the keyboard. When you enter a
command, 172Bug executes the command and the prompt reappears.
However, if you enter a command that causes execution of user target code
(e.g., "GO"), then control may or may not return to 172Bug, depending
on the outcome of the user program.
If you have used one or more of Motorola’s other debugging packages, you
will find the CISC 172Bug very similar. Some effort has also been made
to make the interactive commands more consistent. For example,
delimiters between commands and arguments may now be commas or
spaces interchangeably.

3-2

Computer Group Literature Center Web Site

172Bug Implementation

172Bug Implementation
MVME172Bug is written largely in the "C" programming language,
providing benefits of portability and maintainability. Where necessary,
assembler has been used in the form of separately compiled modules
containing only assembler code — no mixed language modules are used.
Physically, 172Bug is contained in the 28F016SA Flash memory,
providing 512KB (128K longwords) of storage. Optionally, the 172Bug
can be loaded and executed in a single 27C040 PROM. (128K longwords)
of storage. The executable code is checksummed at every power-on or
reset firmware entry, and the result (which includes a pre-calculated
checksum contained in the memory devices), is tested for an expected
zero. Thus, users are cautioned against modification of the memory
devices unless re-checksum precautions are taken.
Note

MVME172 models ordered without the VMEbus interface
are shipped with Flash memory blank (the factory uses the
VMEbus to program the Flash memory with debugger code).
To use the 172Bug package, be sure that jumper header J28
is configured to select the EPROM memory map.
If you subsequently wish to run the debugger from Flash
memory, you must first initialize Flash memory with the
PFLASH command, then reconfigure J28. Refer to Step 12
(Note) on page 3-8 for further details.

http://www.mcg.mot.com/literature

3-3

Debugger General Information

Installation and Startup
Follow the steps below to operate 172Bug with the MVME172 module.
172Bug is factory-installed in the Flash memory of the MVME172, except
in the no-VMEbus case.

Inserting or removing modules while power is applied could
damage module components.

Caution
1. Turn all equipment power OFF. Refer to the Hardware Preparation
section to install/remove jumpers on headers as required for your
particular application.
Jumpers on header J28 affect 172Bug operation as listed below. The
default condition is with all eight jumpers installed, between pins 12, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, and 15-16. (Models with no
VMEbus interface have no jumper between pins 9-10.)
These readable jumpers can be read as a register (at $FFF4202D) on
the Memory Controller (MC2 chip) ASIC. The bit values are read
as a one when the jumper is off, and as a zero when the jumper is on.
This jumper block (header J28) contains eight bits. Refer also to the
MVME172 VME Embedded Controller Programmer’s Reference
Guide for more information on the MC2 chip.
The MVME172Bug reserves/defines the four lower order bits
(GPI3 to GPI0). The following is the description for the bits
reserved/defined by the debugger:
Bit
Bit #0 (GPI0)

3-4

J28 Pins Description
15-16

When set to 1 (high), instructs the debugger
to use local Static RAM for its work page
(i.e., variables, stack, vector tables, etc.).

Computer Group Literature Center Web Site

Installation and Startup

Bit
Bit #1 (GPI1)

J28 Pins Description
13-14

When set to 1 (high), instructs the debugger
to use the default setup/operation parameters
in Flash or PROM versus the user
setup/operation parameters in NVRAM. This
is the same as depressing the RESET and
ABORT switches at the same time. This
feature can be used in the event the user setup
is corrupted or does not meet a sanity check.
Refer to the ENV command (Appendix A)
for the Flash/PROM defaults.

Bit #2 (GPI2)

11-12

Reserved for future use.

Bit #3 (GPI3)

9-10

When set to 0 (low), informs the debugger
that it is executing out of the Flash memory.
When set to 1 (high), as set in non-VMEbus
models, informs the debugger that it is
executing out of the PROM.

Bit #4 (GPI4)

7-8

Open to your application.

Bit #5 (GPI5)

5-6

Open to your application.

Bit #6 (GPI6)

3-4

Open to your application.

Bit #7 (GPI7)

1-2

Open to your application.

Note that when the MVME172 comes up in a cold reset, 172Bug runs in
Board Mode. Using the Environment (ENV) or MENU commands can
make 172Bug run in System Mode. Refer to Appendix A for details.
2. Configure header J1 by installing/removing a jumper between pins
1 and 2. A jumper installed/removed enables/disables the system
controller function of the MVME172.

http://www.mcg.mot.com/literature

3-5

Debugger General Information

3. You may configure Port B of the Z85230 serial communications
controller via a serial interface module (SIMM) which is installed at
connector J15 on the MVME172 board. Five serial interface
modules are available:

– EIA-232-D DTE (SIMM05)
– EIA-232-D DCE (SIMM06)
– EIA-530 DTE (SIMM07)
– EIA-530 DCE (SIMM08)
– EIA-485, or EIA-422 DTE or DCE (all with SIMM09)
For information on removing and/or installing a SIMM, refer to
Chapter 2.
4. Jumpers on headers J16 and J17 configure serial ports 1 and 2 to
drive or receive clock signals provided by the TXC and RXC signal
lines. The factory configures the module for asynchronous
communication, that is, installs no jumpers. Refer to Chapter 2 if
your application requires configuring ports 1 and 2 for synchronous
communication.
5. The jumper on header J14 configures the IP bus clock for either
8MHz (on both MVME172-4xx and -5xx boards) or 32MHz (on
MVME172-5xx boards only). The factory configuration puts a
jumper between J14 pins 1 and 2 for an 8MHz clock. Verify that this
setting is appropriate for your application.
6. The jumper on header J19 enables/disables the IP bus strobe
function on the MVME172. The factory configuration puts a jumper
between J19 pins 1 and 2 to connect the Strobe∗ signal to the IP2
chip. Verify that the strobe line should be connected in your
application.
7. Header J2 defines the state of the snoop control bus when an IP
DMA controller is local bus master. The factory configuration has
both jumpers in place for snoop inhibition. (Pins 3 and 4 are not used
for the MC68xx060.) Verify that this setting is appropriate for your
application.

3-6

Computer Group Literature Center Web Site

Installation and Startup

8. Refer to the setup procedure for your particular chassis or system for
details concerning the installation of the MVME172.
9. Connect the terminal that is to be used as the 172Bug system
console to the default debug EIA-232-D port at serial port 1 on the
front panel of the MVME172 module. Refer to Chapter 2 for other
connection options. Set up the terminal as follows:
– eight bits per character
– one stop bit per character
– parity disabled (no parity)
– baud rate 9600 baud (default baud rate of MVME172 ports at
power-up)
After power-up, you can reconfigure the baud rate of the debug port
if necessary by using the Port Format (PF) command of the 172Bug
debugger.
Note

In order for high-baud rate serial communication between
172Bug and the terminal to work, the terminal must do some
form of handshaking. If the terminal being used does not do
hardware handshaking via the CTS line, then it must do
XON/XOFF handshaking. If you get garbled messages and
missing characters, then you should check the terminal to
make sure XON/XOFF handshaking is enabled.

10. If you want to connect devices (such as a host computer system
and/or a serial printer) to the other EIA-232-D port connectors
(marked SERIAL PORT on the MVME712x transition module),
connect the appropriate cables and configure the port(s) as detailed
in Step 3 above. After power-up, you can reconfigure the port(s) by
programming the MVME172 Z85230 Serial Communications
Controller (SCC), or by using the 172Bug PF command.

http://www.mcg.mot.com/literature

3-7

Debugger General Information

11. Power up the system. 172Bug executes some self-checks and
displays the debugger prompt "172-Bug>" (if in Board Mode).
However, if the ENV command (Appendix A) has put 172Bug in
System Mode, the system performs a selftest and tries to autoboot.
Refer to the ENV and MENU commands. They are listed in Table
4-3.

If the confidence test fails, the test is aborted when the first fault is
encountered. If possible, an appropriate message is displayed, and
control then returns to the menu.
12. Before using the MVME172 after the initial installation, set the date
and time using the following command line structure:
172-Bug>

SET [mmddyyhhmm]|[<+/-CAL>;C ]

For example, the following command line starts the real-time clock
and sets the date and time to 10:37 AM, June 6, 1998:
172-Bug>

SET 0606981037

The board’s self-tests and operating systems require that the realtime clock be running.
Note

If you wish to execute the debugger out of Flash and Flash
does not contain 172Bug, you may copy the PROM version
of 172Bug to Flash memory. To copy the PROM version of
172Bug to Flash memory, first remove the jumper at J28 pins
9 and 10, make sure that 172Bug is in Board Mode, and copy
the PROM contents to Flash memory with the PFLASH
command as follows:
172-Bug>

PFLASH FF800000:80000 FFA00000

Then reinstall the jumper at J28 pins 9 and 10. (172Bug
always executes from memory location FF800000; the state
of J28 determines whether that location is in PROM or
Flash.)

3-8

Computer Group Literature Center Web Site

Autoboot

Autoboot
Autoboot is a software routine that is contained in the 172Bug
Flash/PROM to provide an independent mechanism for booting an
operating system. This autoboot routine automatically scans for controllers
and devices in a specified sequence until a valid bootable device
containing a boot media is found or the list is exhausted. If a valid bootable
device is found, a boot from that device is started. The controller scanning
sequence goes from the lowest controller Logical Unit Number (LUN)
detected to the highest LUN detected. Controllers, devices, and their LUNs
are listed in Appendix E.
At power-up, Autoboot is enabled, and providing the drive and controller
numbers encountered are valid, the following message is displayed upon
the system console:
Autoboot in progress... To abort hit

Following this message there is a delay to allow you an opportunity to
abort the Autoboot process if you wish. Then the actual I/O is begun: the
program pointed to within the volume ID of the media specified is loaded
into RAM and control passed to it. If, however, during this time you want
to gain control without Autoboot, you can press the key or the
software ABORT or RESET switches.
Autoboot is controlled by parameters contained in the ENV command.
These parameters allow the selection of specific boot devices and files, and
allow programming of the Boot delay. Refer to the ENV command in
Appendix A for more details.

!
Caution

Although streaming tape can be used to autoboot, the same
power supply must be connected to the streaming tape drive,
controller, and the MVME172. At power-up, the tape
controller will position the streaming tape to load point where
the volume ID can correctly be read and used.
If, however, the MVME172 loses power but the controller
does not, and the tape happens to be at load point, the
sequences of commands required (attach and rewind) cannot
be given to the controller and autoboot will not be successful.

http://www.mcg.mot.com/literature

3-9

Debugger General Information

ROMboot
As shipped from the factory, 172Bug occupies the first quarter of the Flash
memory. This leaves the remainder of the Flash memory and the PROM
socket (XU2) available for your use. This function is configured/enabled
by the Environment (ENV) command (refer to Appendix A) and executed
at power-up (optionally also at reset) or by the RB command assuming
there is valid code in the memory devices (or optionally elsewhere on the
module or VMEbus) to support it. If ROMboot code is installed, a userwritten routine is given control (if the routine meets the format
requirements). One use of ROMboot might be resetting SYSFAIL* on an
unintelligent controller module. The NORB command disables the
function.

For a user’s ROMboot module to gain control through the ROMboot
linkage, four requirements must be met:
❏

Power must have just been applied (but the ENV command can
change this to also respond to any reset).

❏

Your routine must be located within the MVME172 Flash/PROM
memory map (but the ENV command can change this to any other
portion of the onboard memory, or even offboard VMEbus
memory).

❏

The ASCII string "BOOT" must be located within the specified
memory range.

❏

Your routine must pass a checksum test, which ensures that this
routine was really intended to receive control at powerup.

For complete details on how to use ROMboot, refer to the Debugging
Package for Motorola 68K CISC CPUs User’s Manual.

Network Boot
Network Auto Boot is a software routine contained in the 172Bug
Flash/PROM that provides a mechanism for booting an operating system
using a network (local Ethernet interface) as the boot device. The Network

3-10

Computer Group Literature Center Web Site

Restarting the System

Auto Boot routine automatically scans for controllers and devices in a
specified sequence until a valid bootable device containing a boot media is
found or the list is exhausted. If a valid bootable device is found, a boot
from that device is started. The controller scanning sequence goes from the
lowest controller Logical Unit Number (LUN) detected to the highest LUN
detected. (Refer to Appendix E for default LUNs.)
At power-up, Network Boot is enabled, and providing the drive and
controller numbers encountered are valid, the following message is
displayed upon the system console:
"Network Boot in progress... To abort hit "

Following this message there is a delay to allow you to abort the Auto Boot
process if you wish. Then the actual I/O is begun: the program pointed to
within the volume ID of the media specified is loaded into RAM and
control passed to it. If, however, during this time you want to gain control
without Network Boot, you can press the key or the software
ABORT or RESET switches.
Network Auto Boot is controlled by parameters contained in the NIOT
and ENV commands. These parameters allow the selection of specific
boot devices, systems, and files, and allow programming of the Boot delay.
Refer to the ENV command in Appendix A for more details.

Restarting the System
You can initialize the system to a known state in three different ways:
reset, abort, and break. Each has characteristics which make it more
appropriate than the others in certain situations.
The debugger has a special feature upon a reset condition. This feature is
activated by depressing the RESET and ABORT switches at the same time.
This feature instructs the debugger to use the default setup/operation
parameters in ROM versus your setup/operation parameters in NVRAM.
This feature can be used in the event your setup/operation parameters are
corrupted or do not meet a sanity check. Refer to the ENV command in
Appendix A for the ROM defaults.

http://www.mcg.mot.com/literature

3-11

Debugger General Information

Reset
Pressing and quickly releasing the MVME172 front panel RESET button
initiates a system reset. COLD and WARM reset modes are available. By
default, 172Bug is in COLD mode. During COLD reset, a total system
initialization takes place, as if the MVME172 had just been powered up.
All static variables (including disk device and controller parameters) are
restored to their default states. The breakpoint table and offset registers are
cleared. The target registers are invalidated. Input and output character
queues are cleared. Onboard devices (timer, serial ports, etc.) are reset, and
the two serial ports are reconfigured to their default state.

During WARM reset, the 172Bug variables and tables are preserved, as
well as the target state registers and breakpoints.
Reset must be used if the processor ever halts, or if the 172Bug
environment is ever lost (vector table is destroyed, stack corrupted, etc.).

3-12

Computer Group Literature Center Web Site

Restarting the System

Abort
Abort is invoked by pressing and releasing the ABORT switch on the
MVME172 front panel. Whenever abort is invoked when executing a user
program (running target code), a "snapshot" of the processor state is
captured and stored in the target registers. For this reason, abort is most
appropriate when terminating a user program that is being debugged.
Abort should be used to regain control if the program gets caught in a loop,
etc. The target PC, register contents, etc., help to pinpoint the malfunction.
Pressing and releasing the ABORT switch generates a local board condition
which may interrupt the processor if enabled. The target registers,
reflecting the machine state at the time the ABORT switch was pressed, are
displayed on the screen. Any breakpoints installed in your code are
removed and the breakpoint table remains intact. Control is returned to the
debugger.

Break
A "Break" is generated by pressing and releasing the BREAK key on the
terminal keyboard. Break does not generate an interrupt. The only time
break is recognized is when characters are sent or received by the console
port. Break removes any breakpoints in your code and keeps the
breakpoint table intact. Break also takes a snapshot of the machine state if
the function was entered using SYSCALL. This machine state is then
accessible to you for diagnostic purposes.
Many times it may be desirable to terminate a debugger command prior to
its completion; for example, during the display of a large block of memory.
Break allows you to terminate the command.

http://www.mcg.mot.com/literature

3-13

Debugger General Information

SYSFAIL* Assertion/Negation
Upon a reset/powerup condition the debugger asserts the VMEbus
SYSFAIL* line (refer to the VMEbus specification). SYSFAIL* stays
asserted if any of the following has occurred:

❏

confidence test failure

❏

NVRAM checksum error

❏

NVRAM low battery condition

❏

local memory configuration status

❏

self test (if system mode) has completed with error

❏

MPU clock speed calculation failure

After debugger initialization is done and none of the above situations have
occurred, the SYSFAIL* line is negated. This indicates to the user or
VMEbus masters the state of the debugger. In a multi-computer
configuration, other VMEbus masters could view the pertinent control and
status registers to determine which CPU is asserting SYSFAIL*.
SYSFAIL* assertion/negation is also affected by the ENV command.
Refer to Appendix A.

MPU Clock Speed Calculation
The clock speed of the microprocessor is calculated and checked against a
user definable parameter housed in NVRAM (refer to the CNFG
command in Appendix A). If the check fails, a warning message is
displayed. The calculated clock speed is also checked against known clock
speeds and tolerances.

3-14

Computer Group Literature Center Web Site

Memory Requirements

Memory Requirements
The program portion of 172Bug is approximately 512KB of code,
consisting of download, debugger, and diagnostic packages and contained
entirely in Flash or PROM.
The 172Bug executes from $FF800000 whether in Flash or PROM. With
the jumper at J28 pins 9-10 installed (the factory ship configuration except
in the no-VMEbus case), the Flash memory appears at address $FF800000
and is the part executed during reset. The PROM socket is mapped to
address $FFA00000 with this configuration. If you remove the jumper at
J28 pins 9 and 10, the address spaces of the Flash and PROM are swapped.
The 172Bug initial stack completely changes all 8KB of memory at
addresses $FFE0C000 through $FFE0DFFF at power-up or reset.
Type of Memory Present

Default DRAM
Base Address

Single DRAM mezzanine

$00000000

Default SRAM
Base Address
$FFE00000
(onboard SRAM)

DRAM is neither ECC nor parity type, but unprotected.
The 172Bug requires 2KB of NVRAM for storage of board configuration,
communication, and booting parameters. This storage area begins at
$FFFC16F8 and ends at $FFFC1EF7.
172Bug requires a minimum of 64KB of contiguous read/write memory to
operate. The ENV command controls where this block of memory is
located. Regardless of where the onboard RAM is located, the first 64KB
is used for 172Bug stack and static variable space and the rest is reserved
as user space. Whenever the MVME172 is reset, the target PC is initialized
to the address cor- responding to the beginning of the user space, and the
target stack pointers are initialized to addresses within the user space, with
the target Interrupt Stack Pointer (ISP) set to the top of the user space.

http://www.mcg.mot.com/literature

3-15

Debugger General Information

Disk I/O Support
172Bug can initiate disk input/output by communicating with intelligent
disk controller modules over the VMEbus. Disk support facilities built into
172Bug consist of command-level disk operations, disk I/O system calls
(only via one of the TRAP #15 instructions) for use by user programs, and
defined data structures for disk parameters.

Parameters such as the address where the module is mapped and the type
and number of devices attached to the controller module are kept in tables
by 172Bug. Default values for these parameters are assigned at power-up
and cold-start reset, but may be altered as described in the section on
default parameters, later in this chapter.
Appendix E contains a list of the controllers presently supported, as well
as a list of the default configurations for each controller.

Blocks Versus Sectors
The logical block defines the unit of information for disk devices. A disk
is viewed by 172Bug as a storage area divided into logical blocks. By
default, the logical block size is set to 256 bytes for every block device in
the system. The block size can be changed on a per device basis with the
IOT command.
The sector defines the unit of information for the media itself, as viewed
by the controller. The sector size varies for different controllers, and the
value for a specific device can be displayed and changed with the IOT
command.
When a disk transfer is requested, the start and size of the transfer is
specified in blocks. 172Bug translates this into an equivalent sector
specification, which is then passed on to the controller to initiate the
transfer. If the conversion from blocks to sectors yields a fractional sector
count, an error is returned and no data is transferred.

3-16

Computer Group Literature Center Web Site

Disk I/O Support

Device Probe Function
A device probe with entry into the device descriptor table is done
whenever a specified device is accessed; i.e., when system calls .DSKRD,
.DSKWR, .DSKCFIG, .DSKFMT, and .DSKCTRL, and debugger
commands BH, BO, IOC, IOP, IOT, MAR, and MAW are used.
The device probe mechanism utilizes the SCSI commands "Inquiry" and
"Mode Sense". If the specified controller is non-SCSI, the probe simply
returns a status of "device present and unknown". The device probe makes
an entry into the device descriptor table with the pertinent data. After an
entry has been made, the next time a probe is done it simply returns with
"device present" status (pointer to the device descriptor).

Disk I/O via 172Bug Commands
These following 172Bug commands are provided for disk I/O. Detailed
instructions for their use are found in the Debugging Package for Motorola
68K CISC CPUs User’s Manual. When a command is issued to a particular
controller LUN and device LUN, these LUNs are remembered by 172Bug
so that the next disk command defaults to use the same controller and
device.
IOI (Input/Output Inquiry)
This command is used to probe the system for all possible CLUN/DLUN
combinations and display inquiry data for devices which support it. The
device descriptor table only has space for 16 device descriptors; with the
IOI command, you can view the table and clear it if necessary.

http://www.mcg.mot.com/literature

3-17

Debugger General Information

IOP (Physical I/O to Disk)
IOP allows you to read or write blocks of data, or to format the specified
device in a certain way. IOP creates a command packet from the
arguments you have specified, and then invokes the proper system call
function to carry out the operation.

IOT (I/O Teach)
IOT allows you to change any configurable parameters and attributes of
the device. In addition, it allows you to see the controllers available in the
system.
IOC (I/O Control)
IOC allows you to send command packets as defined by the particular
controller directly. IOC can also be used to look at the resultant device
packet after using the IOP command.
BO (Bootstrap Operating System)
BO reads an operating system or control program from the specified
device into memory, and then transfers control to it.
BH (Bootstrap and Halt)
BH reads an operating system or control program from a specified device
into memory, and then returns control to 172Bug. It is used as a debugging
tool.

Disk I/O via 172Bug System Calls
All operations that actually access the disk are done directly or indirectly
by 172Bug TRAP #15 system calls. (The command-level disk operations
provide a convenient way of using these system calls without writing and
executing a program.)

3-18

Computer Group Literature Center Web Site

Disk I/O Support

The following system calls are provided to allow user programs to do disk
I/O:
.DSKRD

Disk read. System call to read blocks from a disk into memory.

.DSKWR

Disk write. System call to write blocks from memory onto a
disk.

.DSKCFIG

Disk configure. This function allows you to change the
configuration of the specified device.

.DSKFMT

Disk format. This function allows you to send a format
command to the specified device.

.DSKCTRL

Disk control. This function is used to implement any special
device control functions that cannot be accommodated easily
with any of the other disk functions.

Refer to the Debugging Package for Motorola 68K CISC CPUs User’s
Manual for information on using these and other system calls.
To perform a disk operation, 172Bug must eventually present a particular
disk controller module with a controller command packet which has been
especially prepared for that type of controller module. (This is
accomplished in the respective controller driver module.) A command
packet for one type of controller module usually does not have the same
format as a command packet for a different type of module. The system
call facilities which do disk I/O accept a generalized (controllerindependent) packet format as an argument, and translate it into a
controller-specific packet, which is then sent to the specified device. Refer
to the system call descriptions in the Debugging Package for Motorola
68K CISC CPUs User’s Manual for details on the format and construction
of these standardized "user" packets.

http://www.mcg.mot.com/literature

3-19

Debugger General Information

The packets which a controller module expects to be given vary from
controller to controller. The disk driver module for the particular hardware
module (board) must take the standardized packet given to a trap function
and create a new packet. This new packet is specifically tailored for the
disk drive controller for which it is sent. Refer to documentation on the
particular controller module for the format of its packets, and for using the
IOC command.

Default 172Bug Controller and Device Parameters
172Bug initializes the parameter tables for a default configuration of
controllers and devices (refer to Appendix E). If the system needs to be
configured differently than this default configuration (for example, to use
a 70MB Winchester drive where the default is a 40MB Winchester drive),
then these tables must be changed.
There are three ways to change the parameter tables:
❏

Using BO or BH. When you invoke one of these commands, the
configuration area of the disk is read and the parameters
corresponding to that device are rewritten according to the
parameter information contained in the configuration area. This is a
temporary change. If a cold-start reset occurs, then the default
parameter information is written back into the tables.

❏

Using the IOT. You can use this command to reconfigure the
parameter table manually for any controller and/or device that is
different from the default. This is also a temporary change and is
overwritten if a cold-start reset occurs.

Disk I/O Error Codes
172Bug returns an error code if an attempted disk operation is
unsuccessful.

3-20

Computer Group Literature Center Web Site

Network I/O Support

Network I/O Support
The Network Boot Firmware provides the capability to boot the CPU
through the Flash/PROM debugger using a network (local Ethernet
interface) as the boot device.

The booting process is executed in two distinct phases.
❏

The first phase allows the diskless remote node to discover its
network identify and the name of the file to be booted.

❏

The second phase has the diskless remote node reading the boot file
across the network into its memory.

The various modules (capabilities) and the dependencies of these modules
that support the overall network boot function are described in the
following paragraphs.

Intel 82596 LAN Coprocessor Ethernet Driver
This driver manages/surrounds the Intel 82596 LAN Coprocessor.
Management is in the scope of the reception of packets, the transmission
of packets, receive buffer flushing, and interface initialization.
This module ensures that the packaging and unpackaging of Ethernet
packets is done correctly in the Boot PROM.

UDP/IP Protocol Modules
The Internet Protocol (IP) is designed for use in interconnected systems of
packet-switched computer communication networks. The Internet
Protocol provides for transmitting of blocks of data called datagrams
(hence User Datagram Protocol, or UDP) from sources to destinations,
where sources and destinations are hosts identified by fixed length
addresses.
The UDP/IP protocols are necessary for the TFTP and BOOTP protocols;
TFTP and BOOTP require a UDP/IP connection.

http://www.mcg.mot.com/literature

3-21

Debugger General Information

RARP/ARP Protocol Modules
The Reverse Address Resolution Protocol (RARP) basically consists of an
identity-less node broadcasting a "whoami" packet onto the Ethernet, and
waiting for an answer. The RARP server fills an Ethernet reply packet up
with the target’s Internet Address and sends it.

The Address Resolution Protocol (ARP) basically provides a method of
converting protocol addresses (e.g., IP addresses) to local area network
addresses (e.g., Ethernet addresses). The RARP protocol module supports
systems which do not support the BOOTP protocol (next paragraph).

BOOTP Protocol Module
The Bootstrap Protocol (BOOTP) basically allows a diskless client
machine to discover its own IP address, the address of a server host, and
the name of a file to be loaded into memory and executed.

TFTP Protocol Module
The Trivial File Transfer Protocol (TFTP) is a simple protocol to transfer
files. It is implemented on top of the Internet User Datagram Protocol
(UDP or Datagram) so it may be used to move files between machines on
different networks implementing UDP. The only thing it can do is read and
write files from/to a remote server.

Network Boot Control Module
The "control" capability of the Network Boot Control Module is needed to
tie together all the necessary modules (capabilities) and to sequence the
booting process. The booting sequence consists of two phases: the first
phase is labeled "address determination and bootfile selection" and the
second phase is labeled "file transfer". The first phase will utilize the
RARP/BOOTP capability and the second phase will utilize the TFTP
capability.

3-22

Computer Group Literature Center Web Site

Multiprocessor Support

Network I/O Error Codes
172Bug returns an error code if an attempted network operation is
unsuccessful.

Multiprocessor Support
The MVME172 dual-port RAM feature makes the shared RAM available
to remote processors as well as to the local processor. This can be done by
either of the following two methods. Either method can be
enabled/disabled by the ENV command as its Remote Start Switch
Method (refer to Appendix A).

Multiprocessor Control Register (MPCR) Method
A remote processor can initiate program execution in the local MVME172
dual-port RAM by issuing a remote GO command using the
Multiprocessor Control Register (MPCR). The MPCR, located at shared
RAM location of $800 offset from the base address the debugger loads it
at, contains one of two longwords used to control communication between
processors. The MPCR contents are organized as follows:
$800

http://www.mcg.mot.com/literature

N/A

(MPCR)

3-23

Debugger General Information

The status codes stored in the MPCR are of two types:

❏

Status returned (from the monitor)

❏

Status set (by the bus master)

The status codes that may be returned from the monitor are:
HEX

(HEX 00) --

Wait. Initialization not yet complete.

ASCII E

(HEX 45) --

Code pointed to by the MPAR address is executing.

ASCII P

(HEX 50) --

Program Flash Memory. The MPAR is set to the
address of the Flash memory program control packet.

ASCII R

(HEX 52) --

Ready. The firmware monitor is watching for a change.

You can only program Flash memory by the MPCR method. Refer to the
.PFLASH system call in the Debugging Package for Motorola 68K CISC
CPUs User’s Manual for a description of the Flash memory program
control packet structure. The status codes that may be set by the bus master
are:
ASCII G

(HEX 47) --

Use Go Direct (GD) logic specifying the MPAR address.

ASCII B

(HEX 42) --

Install breakpoints using the Go (G) logic.

The Multiprocessor Address Register (MPAR), located in shared RAM
location of $804 offset from the base address the debugger loads it at,
contains the second of two longwords used to control communication
between processors. The MPAR contents specify the address at which
execution for the remote processor is to begin if the MPCR contains a G or
B. The MPAR is organized as follows:
$804

(MPAR)

At power-up, the debug monitor self-test routines initialize RAM,
including the memory locations used for multi-processor support ($800
through $807).
The MPCR contains $00 at power-up, indicating that initialization is not
yet complete. As the initialization proceeds, the execution path comes to
the "prompt" routine. Before sending the prompt, this routine places an R
in the MPCR to indicate that initialization is complete. Then the prompt is
sent.

3-24

Computer Group Literature Center Web Site

Multiprocessor Support

If no terminal is connected to the port, the MPCR is still polled to see
whether an external processor requires control to be passed to the dual-port
RAM. If a terminal does respond, the MPCR is polled for the same purpose
while the serial port is being polled for user input.
An ASCII G placed in the MPCR by a remote processor indicates that the
Go Direct type of transfer is requested. An ASCII B in the MPCR indicates
that breakpoints are to be armed before control is transferred (as with the
GO command).
In either sequence, an E is placed in the MPCR to indicate that execution
is underway just before control is passed to RAM. (Any remote processor
could examine the MPCR contents.)
If the code being executed in dual-port RAM is to reenter the debug
monitor, a TRAP #15 call using function $0063 (SYSCALL .RETURN)
returns control to the monitor with a new display prompt. Note that every
time the debug monitor returns to the prompt, an R is moved into the
MPCR to indicate that control can be transferred once again to a specified
RAM location.

GCSR Method
A remote processor can initiate program execution in the local MVME172
dual-port RAM by issuing a remote GO command using the VMEchip2
Global Control and Status Registers (GCSR). The remote processor places
the MVME172 execution address in general purpose registers 0 and 1
(GPCSR0 and GPCSR1). The remote processor then sets bit 8 (SIG0) of
the VMEchip2 LM/SIG register. This causes the MVME172 to install
breakpoints and begin execution. The result is identical to the MPCR
method (with status code B) described in the previous section.

http://www.mcg.mot.com/literature

3-25

Debugger General Information

The GCSR registers are accessed in the VMEbus short I/O space. Each
general purpose register is two bytes wide, occurring at an even address.
The general purpose register number 0 is at an offset of $8 (local bus) or
$4 (VMEbus) from the start of the GCSR registers. The local bus base
address for the GCSR is $FFF40100. The VMEbus base address for the
GCSR depends on the group select value and the board select value
programmed in the Local Control and Status Registers (LCSR) of the
MVME172. The execution address is formed by reading the GCSR
general purpose registers in the following manner:

GPCSR0

used as the upper 16 bits of the address

GPCSR1

used as the lower 16 bits of the address

The address appears as:
GPCSR0

GPCSR1

Diagnostic Facilities
The 172Bug package includes a set of hardware diagnostics for testing and
troubleshooting the MVME172. To use the diagnostics, switch directories
to the diagnostic directory. If you are in the debugger directory, you can
switch to the diagnostic directory with the debugger command Switch
Directories (SD). The diagnostic prompt ("172-Diag>") appears. Refer to
the MVME172Bug Diagnostics Manual for complete descriptions of the
diagnostic routines available and instructions on how to invoke them. Note
that some diagnostics depend on restart defaults that are set up only in a
particular restart mode. The documentation for such diagnostics includes
restart information.

Manufacturing Test Process
During the manufacturing process for MVME172 modules, the
manufacturing test parameters and testing state flags are stored in
NVRAM. These strings are installed during the manufacturing process and

3-26

Computer Group Literature Center Web Site

Manufacturing Test Process

result in the product performing manufacturing tests. None of these tests
harm the product or system into which a module is installed. Entering an
ASCII break on the console port from a terminal terminates these tests.

The two state flags that start the test processes are:
FLASH EMPTY$00122984

and
Burnin test$00000000

If either string is in the first location of NVRAM ($FFFC0000), the test
process starts.

http://www.mcg.mot.com/literature

3-27

4Using the 172Bug
Debugger

This Chapter Covers
❏

Entering debugger command lines

❏

Entering and debugging programs

❏

Calling system utilities from user programs

❏

Preserving the debugger operating environment

❏

Floating point support

❏

The 172Bug debugger command set

Entering Debugger Command Lines
172Bug is command-driven and performs its various operations in
response to user commands entered at the keyboard. When the debugger
prompt
172-Bug>

appears on the terminal screen, then the debugger is ready to accept
commands.

Terminal Input/Output Control
As the command line is entered, it is stored in an internal buffer. Execution
begins only after the carriage return is entered, so that you can correct entry
errors, if necessary, using the control characters described below.

4-1

Using the 172Bug Debugger

Note

The presence of the upward caret ( ^ ) before a character
indicates that the Control (CTRL) key must be held down
while striking the character key.

(cancel line) The cursor is backspaced to the beginning of the line.

(backspace) The cursor is moved back one position.

Delete (delete)
key

Performs the same function as ^H.

(redisplay)

The entire command line as entered so far is redisplayed
on the following line.

(repeat)

Repeats the previous line. This happens only at the
command line. The last line entered is redisplayed but not
executed. The cursor is positioned at the end of the line.
You may enter the line as is or you can add more
characters to it. You can edit the line by backspacing and
typing over old characters.

When observing output from any 172Bug command, the XON and XOFF
characters which are in effect for the terminal port may be entered to
control the output, if the XON/XOFF protocol is enabled (default). These
characters are initialized to ^S and ^Q respectively by 172Bug, but you
may change them with the PF command. In the initialized (default) mode,
operation is as follows:
^S

(wait)

Console output is halted.

(resume)

Console output is resumed.

When a command is entered, the debugger executes the command and the
prompt reappears. However, if the command entered causes execution of
user target code, for example GO, then control may or may not return to
the debugger, depending on what the user program does.
For example, if a breakpoint has been specified, then control returns to the
debugger when the breakpoint is encountered during execution of the user
program. Alternately, the user program could return to the debugger by
means of the TRAP #15 function ".RETURN".

4-2

Computer Group Literature Center Web Site

Entering Debugger Command Lines

Debugger Command Syntax
In general, a debugger command is made up of the following parts:
❏

The command identifier (i.e., MD or md for the Memory Display
command). Note that either upper- or lowercase is allowed.

❏

A port number, if the command is set up to work with more than one
port.

❏

At least one intervening space before the first argument.

❏

Any required arguments, as specified by the command.

❏

An option field, set off by a semicolon (;) to specify conditions other
than the default conditions of the command.

The commands are shown using a modified Backus-Naur form syntax. The
metasymbols used are:

Syntactic Variables
The following syntactic variables are encountered in the command
descriptions which follow. In addition, other syntactic variables may be
used and are defined in the particular command description in which they
occur.
exp

Expression (described in detail in a following section).

addr

Address (described in detail in a following section).

count

Count; the syntax is the same as for exp.

range

A range of memory addresses which may be specified either
by addr addr or by addr: count.

text

An ASCII string of up to 255 characters, delimited at each end
by the single quote mark (’).

Expression as a Parameter
An expression can be one or more numeric values separated by the
arithmetic operators: plus (+), minus (-), multiplied by (*), divided by (/),
logical AND (&), shift left (<<), or shift right (>>).

http://www.mcg.mot.com/literature

4-3

Using the 172Bug Debugger

Numeric values may be expressed in either hexadecimal, decimal, octal, or
binary by immediately preceding them with the proper base identifier.
Base

Identifier

Examples

Hexadecimal

$FFFFFFFF

Decimal

&1974, &10-&4

Octal

@456

Binary

%1000110

If no base identifier is specified, then the numeric value is assumed to be
hexadecimal.
A numeric value may also be expressed as a string literal of up to four
characters. The string literal must begin and end with the single quote mark
(’). The numeric value is interpreted as the concatenation of the ASCII
values of the characters. This value is right-justified, as any other numeric
value would be.
String
Literal

Numeric Value
(In Hexadecimal)

’A’

’ABC’

414243

’TEST’

54455354

Evaluation of an expression is always from left to right unless parentheses
are used to group part of the expression. There is no operator precedence.
Subexpressions within parentheses are evaluated first. Nested
parenthetical subexpressions are evaluated from the inside out.
Valid expression examples:
Expression

4-4

Result (In Hex)

FF0011

45+99

&45+&99

@35+@67+@10

%10011110+%1001

88<<4

880

Notes

shift left

Computer Group Literature Center Web Site

Entering Debugger Command Lines

Expression
AA&F0

Result (In Hex)
A0

Notes
logical AND

The total value of the expression must be between 0 and $FFFFFFFF.
Address as a Parameter

Many commands use addr as a parameter. The syntax accepted by 172Bug
is similar to the one accepted by the MC68060 one-line assembler. All
control addressing modes are allowed. An "address + offset register" mode
is also provided.
Address Formats
Table 4-1 summarizes the address formats that are acceptable for address
parameters in debugger command lines.
Table 4-1. Debugger Address Parameter Formats
Format

Example

Description

140

Absolute address+contents of automatic offset register.

N+Rn

130+R5

Absolute address+contents of the specified offset register
(not an assembler-accepted syntax).

(An)

(A1)

Address register indirect. (Also post-increment, predecrement)

(d,An) or
d(An)

(120,A1)
120(A1)

Address register indirect with displacement (two formats
accepted).

(d,An,Xn) or
d(An,Xn)

(&120,A1,D2)
&120(A1,D2)

Address register indirect with index and displacement
(two formats accepted).

([bd,An,Xn],od)

([C,A2,A3],&100)

Memory indirect preindexed.

([bd,An],Xn,od)

([12,A3],D2,&10)

Memory indirect postindexed.

For the memory indirect modes, fields can be omitted.
For example, three of many permutations are as follows:

http://www.mcg.mot.com/literature

4-5

Using the 172Bug Debugger

Table 4-1. Debugger Address Parameter Formats
Format

Example

([,An],od)

([,A1],4)

([bd])

([FC1E])

([bd,,Xn])

([8,,D2])

Description

Notes
N
An
Xn
d
bd
od
n
Rn

—
—
—
—
—
—
—
—

Absolute address (any valid expression).
Address register n.
Index register n (An or Dn).
Displacement (any valid expression).
Base displacement (any valid expression).
Outer displacement (any valid expression).
Register number (0 to 7).
Offset register n.

Note

4-6

In commands with range specified as addr addr, and with
size option W or L chosen, data at the second (ending)
address is acted on only if the second address is a proper
boundary for a word or longword, respectively.

Computer Group Literature Center Web Site

Entering Debugger Command Lines

Offset Registers
Eight pseudo-registers (R0 through R7) called offset registers are used to
simplify the debugging of relocatable and position-independent modules.
The listing files in these types of programs usually start at an address
(normally 0) that is not the one at which they are loaded, so it is harder to
correlate addresses in the listing with addresses in the loaded program. The
offset registers solve this problem by taking into account this difference
and forcing the display of addresses in a relative address+offset format.
Offset registers have adjustable ranges and may even have overlapping
ranges. The range for each offset register is set by two addresses: base and
top. Specifying the base and top addresses for an offset register sets its
range. In the event that an address falls in two or more offset registers’
ranges, the one that yields the least offset is chosen.
Note

Relative addresses are limited to 1MB (5 digits), regardless
of the range of the closest offset register.

http://www.mcg.mot.com/literature

4-7

Using the 172Bug Debugger

Example:

A portion of the listing file of an assembled, relocatable module is shown
below:

1
2
3
4
5
6
7
8
9
10
11
12
13
14

*
* MOVE STRING SUBROUTINE
*
0 00000000 48E78080
MOVESTR MOVEM.L
D0/A0,—(A7)
0 00000004 4280
CLR.L
D0
0 00000006 1018
MOVE.B
(A0)+,D0
0 00000008 5340
SUBQ.W
#1,D0
0 0000000A 12D8
LOOP
MOVE.B
(A0)+,(A1)+
0 0000000C 51C8FFFC
MOVS
DBRA
D0,LOOP
0 00000010 4CDF0101
MOVEM.L
(A7)+,D0/A0
0 00000014 4E75
RTS
END

END

******

TOTAL ERRORS

0——

******

TOTAL WARNINGS

0——

The above program was loaded at address $0001327C.
The disassembled code is shown next:
172Bug>MD 1327C;DI
0001327C 48E78080
00013280 4280
00013282 1018
00013284 5340
00013286 12D8
00013288 51C8FFFC
0001328C 4CDF0101
00013290 4E75
172Bug>

4-8

MOVEM.L
CLR.L
MOVE.B
SUBQ.W
MOVE.B
DBF
MOVEM.L
RTS

D0/A0,—(A7)
D0
(A0)+,D0
#1,D0
(A0)+,(A1)+
D0,$13286
(A7)+,D0/A0

Computer Group Literature Center Web Site

Entering Debugger Command Lines

By using one of the offset registers, the disassembled code addresses can
be made to match the listing file addresses as follows:
172Bug>OF R0
R0 =00000000 00000000? 1327C.
172Bug>MD 0+R0;DI
00000+R0 48E78080
00004+R0 4280
00006+R0 1018
00008+R0 5340
0000A+R0 12D8
0000C+R0 51C8FFFC
00010+R0 4CDF0101
00014+R0 4E75
172Bug>

MOVEM.L
CLR.L
MOVE.B
SUBQ.W
MOVE.B
DBF
MOVEM.L
RTS

D0/A0,—(A7)
D0
(A0)+,D0
#1,D0
(A0)+,(A1)+
D0,$A+R0
(A7)+,D0/A0

For additional information about the offset registers, refer to the
Debugging Package for Motorola 68K CISC CPUs User’s Manual.

Port Numbers
Some 172Bug commands give you the option to choose the port to be used
to input or output. Valid port numbers which may be used for these
commands are as follows:
❏

MVME172 EIA-232-D Debug (Terminal Port 0 or 00) (PORT 1 on
the MVME172 P2 connector). Sometimes known as the "console
port", it is used for interactive user input/output by default.

❏

MVME172 EIA-232-D (Terminal Port 1 or 01) (PORT 2 on the
MVME172 P2 connector). Sometimes known as the "host port",
this is the default for downloading, uploading, concurrent mode,
and transparent modes.

Note

These logical port numbers (0 and 1) are shown in the pinouts
of the MVME172 module as "SERIAL PORT 1" and
"SERIAL PORT 2", respectively. Physically, they are all part
of connector P2. They are also available at the front panel
DB-25 connectors J25 (for PORT 1 or A) and J18 (for PORT
2 or B).

http://www.mcg.mot.com/literature

4-9

Using the 172Bug Debugger

Entering and Debugging Programs
There are various ways to enter a user program into system memory for
execution:

❏

Create the program with the assembler/disassembler

❏

Download an S-record object file

❏

Read the program from disk

Creating a Program with the Assembler/Disassembler
You can create a program using the Memory Modify (MM) command
with the assembler/disassembler option.
1. Enter the program one source line at a time.
2. After each source line is entered, it is assembled and the object code
is loaded to memory.
Refer to the Debugging Package for Motorola 68K CISC CPUs User’s
Manual for complete details on the 172Bug Assembler/Disassembler.

Downloading an S-Record Object File
Another way to enter a program is to download an object file from a host
system.
The program must be in S-record format (described in the Debugging
Package for Motorola 68K CISC CPUs User’s Manual) and may have
been assembled or compiled on the host system.
Alternately, the program may have been previously created using the
172Bug MM command as outlined above and stored to the host using the
Dump (DU) command.
A communication link must exist between the host system and the
MVME172 port 1. (Hardware configuration details are provided in
Installation and Startup.) The file is downloaded from the host to
MVME172 memory by the Load (LO) command.

4-10

Computer Group Literature Center Web Site

Calling System Utilities from User Programs

Read the Program from Disk
Another way to enter a program is by reading the program from disk, using
one of the disk commands (BO, BH, IOP). Once the object code has been
loaded into memory, you can set breakpoints if desired and run the code or
trace through it.

Calling System Utilities from User Programs
A convenient way of doing character input/output and many other useful
operations has been provided so that you do not have to write these
routines into the target code. You can access various 172Bug routines via
one of the MC68060 TRAP instructions, using vector #15. Refer to the
Debugging Package for Motorola 68K CISC CPUs User’s Manual for
details on the various TRAP #15 utilities available and how to invoke them
from within a user program.

http://www.mcg.mot.com/literature

4-11

Using the 172Bug Debugger

Preserving the Debugger Operating
Environment
This section explains how to avoid contaminating the operating
environment of the debugger. Topics covered include:

❏

172Bug Vector Table and workspace

❏

Hardware functions

❏

Exception vectors used by 172Bug

172Bug uses certain of the MVME172 onboard resources and may also
use offboard system memory to contain temporary variables, exception
vectors, etc. If you disturb resources upon which 172Bug depends, then the
debugger may function unreliably or not at all.
If your application enables translation through the Memory Management
Units (MMUs), and if your application utilizes resources of the debugger
(e.g., system calls), your application must create the necessary translation
tables for the debugger to have access to its various resources. The
debugger honors the enabling of the MMUs; it does not disable translation.

172Bug Vector Table and Workspace
As described in Memory Requirements, 172Bug needs 64KB of read/write
memory to operate.
172Bug
reserves ...

For ...

1024-byte area

A user program vector table area

1024-byte area

An exception vector table for the debugger itself to use

Space for static variables and initializes these static variables to predefined
default values.
Space for the system stack then initializes the system stack pointer to the top of
this area.

4-12

Computer Group Literature Center Web Site

Preserving the Debugger Operating Environment

With the exception of the first 1024-byte vector table area, you must be
extremely careful not to use the above-mentioned memory areas for other
purposes.
Refer to Memory Requirements on page 3-15 to determine how to dictate
the location of the reserved memory areas.

Examples
❏

If, for example, your program inadvertently wrote over the static
variable area containing the serial communication parameters, these
parameters would be lost, resulting in a loss of communication with
the system console terminal.

❏

If your program corrupts the system stack, then an incorrect value
may be loaded into the processor Program Counter (PC), causing a
system crash.

Hardware Functions
The only hardware resources used by the debugger are the EIA-232-D
ports, which are initialized to interface to the debug terminal and a host. If
these ports are reprogrammed, the terminal characteristics must be
modified to suit, or the ports should be restored to the debugger-set
characteristics prior to reinvoking the debugger.

http://www.mcg.mot.com/literature

4-13

Using the 172Bug Debugger

Exception Vectors Used by 172Bug
The exception vectors used by the debugger are listed below. These
vectors must reside at the specified offsets in the target program’s vector
table for the associated debugger facilities (breakpoints, trace mode, etc.)
to operate.

Table 4-2. Exception Vectors Used by 172Bug
Vector
Offset

Exception

172Bug Facility

$10

Illegal instruction

Breakpoints (used by GO, GN, GT)

$24

Trace

Trace operations (such as T, TC, TT)

TRAP #0 - #14

Used internally

TRAP #15

System calls

$ Note 1

Level 7 interrupt

ABORT pushbutton

$ Note 2

Level 7 interrupt

AC Fail

FP Unimplemented Data Type

Software emulation and data type
conversion of floating point data.

$80-$B8
$BC

$DC

Notes
1. This depends on what the Vector Base Register (VBR) is set to in the MC2chip.
2. This depends on what the Vector Base Register (VBR) is set to in the VMEchip2.

When the debugger handles one of the exceptions listed in Table 4-2, the
target stack pointer is left pointing past the bottom of the exception stack
frame created; that is, it reflects the system stack pointer values just before
the exception occurred. In this way, the operation of the debugger facility
(through an exception) is transparent to users.

4-14

Computer Group Literature Center Web Site

Preserving the Debugger Operating Environment

Example: Trace one instruction using debugger.
172-Bug>rd
PC
=00010000
SR
=2708=TR:OFF_S._7_N..
SSP
=0000FFFC
USP
=00010000
SFC
=1=UD
CACR =00000000=D: ....._B:..._I:...
D0
=FFFFFFFF
D1
=00000000
D2
=00000000
D4
=00000000
D5
=00000000
D6
=00000000
A0
=00000000
A1
=00000000
A2
=00000000
A4
=00000000
A5
=00000000
A6
=00000000
IPLR =00000007
IMLR =00000000
MMIEN =00000003
VIST =00000000
PIEN =00002000
PIST
=00000000
00010000 203C0000 0001
MOVE.L
#$1,D0
172-Bug>t
PC
=00010006
SR
=2700=TR:OFF_S._7_.....
SSP* =0000FFFC
USP
=00010000
SFC
=1=UD
CACR =00000000=D: ....._B:..._I:...
D0
=00000001
D1
=00000000
D2
=00000000
D4
=00000000
D5
=00000000
D6
=00000000
A0
=00000000
A1
=00000000
A2
=00000000
A4
=00000000
A5
=00000000
A6
=00000000
IPLR =00000007
IMLR =00000000
MMIEN =00000003
VIST =00000000
PIEN =00002000
PIST
=00000000
00010006 D280 0001
ADD.L
D0,D1
172-Bug>

VBR
DFC
PCR
D3
D7
A3
A7
VIEN

=00000000
=1=UD
=04310402
=00000000
=00000000
=00000000
=0000FFFC
=C0000000

VBR
DFC
PCR
D3
D7
A3
A7
VIEN

=00000000
=1=UD
=04310402
=00000000
=00000000
=00000000
=0000FFFC
=C0000000

Exception Vector Tables
Notice in the preceding example that the value of the target stack pointer
register (A7) has not changed even though a trace exception has taken
place. Your program may either use the exception vector table provided by
172Bug or it may create a separate exception vector table of its own. The
two following sections detail these two methods.
Using 172Bug Target Vector Table
The 172Bug initializes and maintains a vector table area for target
programs. A target program is any program started by the bug:

http://www.mcg.mot.com/literature

4-15

Using the 172Bug Debugger

❏

Manually with GO command

❏

Manually with trace commands (T, TC, or TT)

❏

Automatically with the BO command.

The start address of this target vector table area is the base address ($00)
of the debugger memory. This address is loaded into the target-state VBR
at powerup and cold-start reset and can be observed by using the RD
command to display the target-state registers immediately after powerup.

The 172Bug initializes the target vector table with the debugger vectors
listed in Table 4-2 on page 4-14 and fills the other vector locations with the
address of a generalized exception handler. The target program may take
over as many vectors as desired by simply writing its own exception
vectors into the table. If the vector locations listed in Table 4-2 are
overwritten then the accompanying debugger functions are lost.
The 172Bug maintains a separate vector table for its own use. In general,
you do not have to be aware of the existence of the debugger vector table.
It is completely transparent and you should never make any modifications
to the vectors contained in it.
Creating a New Vector Table
Your program may create a separate vector table in memory to contain its
exception vectors. If this is done, the program must change the value of the
VBR to point at the new vector table. In order to use the debugger facilities
you can copy the proper vectors from the 172Bug vector table into the
corresponding vector locations in your program vector table.
The vector for the 172Bug generalized exception handler may be copied
from offset $08 (bus error vector) in the target vector table to all locations
in your program vector table where a separate exception handler is not
used. This provides diagnostic support in the event that your program is
stopped by an unexpected exception. The generalized exception handler
gives a formatted display of the target registers and identifies the type of
the exception.
The following is an example of a routine which builds a separate vector
table and then moves the VBR to point at it:

4-16

Computer Group Literature Center Web Site

Preserving the Debugger Operating Environment

*
*** BUILDX - Build exception vector table ****
*
BUILDX MOVEC.L VBR,A0
Get copy of VBR.
LEA
$10000,A1
New vectors at $10000.
MOVE.L
$80(A0),D0
Get generalized exception vector.
MOVE.W
$3FC,D1
Load count (all vectors).
LOOP
MOVE.L
D0,(A1,D1)
Store generalized exception vector.
SUBQ.W
#4,D1
BNE.B
LOOP
Initialize entire vector table.
MOVE.L
$10(A0),$10(A1)
Copy breakpoints vector.
MOVE.L
$24(A0),$24(A1)
Copy trace vector.
MOVE.L
$BC(A0),$BC(A1)
Copy system call vector.
LEA.L
COPROCC(PC),A2
Get your exception vector.
MOVE.L
A2,$2C(A1)
Install as F-Line handler.
MOVEC.L A1,VBR
Change VBR to new table.
RTS
END

It may turn out that your program uses one or more of the exception vectors
that are required for debugger operation. Debugger facilities may still be
used, however, if your exception handler can determine when to handle the
exception itself and when to pass the exception to the debugger.
When an exception occurs which you want to pass on to the debugger; i.e.,
ABORT, your exception handler must read the vector offset from the
format word of the exception stack frame. This offset is added to the
address of the 172Bug target program vector table (which your program
saved), yielding the address of the 172Bug exception vector. The program
then jumps to the address stored at this vector location, which is the
address of the 172Bug exception handler.
Your program must make sure that there is an exception stack frame in the
stack and that it is exactly the same as the processor would have created
for the particular exception before jumping to the address of the exception
handler.
The following is an example of an exception handler which can pass an
exception along to the debugger:

http://www.mcg.mot.com/literature

4-17

Using the 172Bug Debugger

*
*** EXCEPT - Exception handler ****
*
EXCEPT SUBQ.L
#4,A7
Save space in stack for a PC value.
LINK
A6,#0
Frame pointer for accessing PC space.
MOVEM.L A0-A5/D0-D7,-(SP) Save registers.
:
: decide here if your code handles exception, if so, branch...
:
MOVE.L
BUFVBR,A0
Pass exception to debugger; Get saved VBR.
MOVE.W
14(A6),D0
Get the vector offset from stack frame.
AND.W
#$0FFF,D0
Mask off the format information.
MOVE.L
(A0,D0.W),4(A6)
Store address of debugger exc handler.
MOVEM.L (SP)+,A0-A5/D0-D7 Restore registers.
UNLK
A6
RTS
Put addr of exc handler into PC and go.

Floating Point Support
The floating point unit (FPU) of the MC68060 microprocessor chip is
supported in 172Bug. The MD, MM, RM, and RS commands have been
extended to allow display and modification of floating point data in
registers and in memory. Floating point instructions can be assembled and
disassembled with the DI option of the MD and MM commands.
RM and RS for floating point registers accept the floating point value in
Double Precision Real Format or Scientific Notation.

4-18

Computer Group Literature Center Web Site

Floating Point Support

Valid data types that can be used when modifying a floating point data
register or a floating point memory location:
Integer Data Types
12

Byte

1234

Word

12345678

Longword

Floating Point Data Types
1_FF_7FFFFF

Single Precision Real Format

1_7FF_FFFFFFFFFFFFF

Double Precision Real Format

-3.12345678901234501_E+123 Scientific Notation Format (decimal)

When entering data in single or double precision, the following rules must
be observed:
1. The sign field is the first field and is a binary field.
2. The exponent field is the second field and is a hexadecimal field.
3. The mantissa field is the last field and is a hexadecimal field.
4. The sign field, the exponent field, and at least the first digit of the
mantissa field must be present (any unspecified digits in the
mantissa field are set to zero).
5. Each field must be separated from adjacent fields by an underscore.
6. All the digit positions in the sign and exponent fields must be
present.

Single Precision Real
This format would appear in memory as:
1-bit sign field

http://www.mcg.mot.com/literature

(1 binary digit)

4-19

Using the 172Bug Debugger

8-bit biased exponent field
23-bit fraction field

(2 hex digits. Bias = $7F)
(6 hex digits)

A single precision number takes 4 bytes in memory.

Double Precision Real
This format would appear in memory as:
1-bit sign field

(1 binary digit)

11-bit biased exponent field

(3 hex digits. Bias = $3FF)

52-bit fraction field

(13 hex digits)

A double precision number takes 8 bytes in memory.
Note

4-20

The single and double precision formats have an implied
integer bit (always 1).

Computer Group Literature Center Web Site

Floating Point Support

Scientific Notation
This format provides a convenient way to enter and display a floating point
decimal number. Internally, the number is assembled into a packed
decimal number and then converted into a number of the specified data
type.

Entering data in this format requires the following fields:
An optional sign bit (+ or -).
One decimal digit followed by a decimal point.
Up to 17 decimal digits (at least one must be entered).
An optional Exponent field that consists of:
An optional underscore.
The Exponent field identifier, letter “E”.
An optional Exponent sign (+, -).
From 1 to 3 decimal digits.
For more information about the MC68060 floating point unit, refer to the
MC68060 Microprocessor User’s Manual.

http://www.mcg.mot.com/literature

4-21

Using the 172Bug Debugger

The 172Bug Debugger Command Set
The 172Bug debugger commands are summarized in Table 4-3. The
command syntax is shown using the symbols explained earlier in this
chapter. The CNFG and ENV commands are explained in Appendix A.
Controllers, devices, and their LUNs are listed in Appendix D or Appendix
E. All other command details are explained in the MVME172Bug
Debugging Package User’s Manual.

Table 4-3. Debugger Commands
Command
Mnemonic
AB
NOAB
AS
BC
BF
BH

Title
Automatic Bootstrap
Operating System
No Autoboot
One Line Assembler
Block of Memory Compare
Block of Memory Fill

BI
BM
BO
BR
NOBR
BS

Bootstrap Operating
System and Halt
Block of Memory Initialize
Block of Memory Move
Bootstrap Operating System
Breakpoint Insert
Breakpoint Delete
Block of Memory Search

BV
CM

Block of Memory Verify
Concurrent Mode

NOCM
CNFG

No Concurrent Mode
Configure Board
Information Block
Checksum
Data Conversion

CS
DC

4-22

Command Line Syntax
AB [;V]
NOAB
AS addr
BC range addr [; B|W|L]
BF range data [increment]
[; B|W|L]
BH [controller LUN] [device LUN] [string]
BI range [; B|W|L]
BM range addr [; B|W|L]
BO [controller LUN] [device LUN] [string]
BR [addr [:count]]
NOBR [addr]
BS range text [; B|W|L]
or BS range data [mask] [; B|W|L [,N] [,V]]
BV range data [increment] [; B|W|L]
CM [[port] [ID-string] [baud]
[phone-number]]|[; A]|[; H]
NOCM
CNFG [; [I][M]]
CS range [; B|W|L]
DC exp | addr [; [B][O][A]]

Computer Group Literature Center Web Site

The 172Bug Debugger Command Set

Table 4-3. Debugger Commands (Continued)
Command
Mnemonic
DMA
DS
DU
ECHO
ENV

Title
DMA Block of Memory
Move
One Line Disassembler
Dump S-records

MAW

Echo String
Set Environment to
Bug/Operating System
Go Direct (Ignore
Breakpoints)
Go to Next Instruction
Go Execute User Program
Go to Temporary Breakpoint
Help
I/O Control for Disk
I/O Inquiry
I/O Physical (Direct Disk
Access)
I/O "TEACH" for
Configuring
Disk Controller
Interrupt Request Mask
Load S-records from Host
Macro Define/Display
Macro Delete
Macro Edit
Enable Macro Expansion
Listing
Disable Macro Expansion
Listing
Save Macros

MAR

Load Macros

GD
GN
GO
GT
HE
IOC
IOI
IOP
IOT

IRQM
LO
MA
NOMA
MAE
MAL
NOMAL

http://www.mcg.mot.com/literature

Command Line Syntax
DMA range addr vdir am blk
[; B|W|L]
DS addr [:count | addr]
DU [port] range [text]
[addr] [offset] [; B|W|L]
ECHO [port] {hexadecimal number} {’string’}
ENV [; [D]]
GD [addr]
GN
GO [addr]
GT addr
HE [command]
IOC
IOI [; [C|L]]
IOP
IOT [; [A|F|H|T]]

IRQM [mask]
LO [port] [addr] [; [X] [C] [T]] [=text]
MA [name|; L]
NOMA [name]
MAE name line# [string]
MAL
NOMAL
MAW [controller LUN] [device LUN]
[del block #]
MAR [controller LUN] [device LUN]
[del block #]

4-23

Using the 172Bug Debugger

Table 4-3. Debugger Commands (Continued)
Command
Mnemonic
MD

MENU
MM
MMD
MS
MW
NAB
NBH
NBO
NIOC
NIOP
NIOT
NPING
OF
PA
NOPA
PF
NOPF
PFLASH

PS
RB
NORB

4-24

Title
Memory Display
Menu
Memory Modify
Memory Map Diagnostic
Memory Set
Memory Write
Automatic Network Boot
Operating System
Network Boot Operating
System and Halt
Network Boot Operating
System
Network I/O Control
Network I/O Physical
Network I/O Teach
Network Ping
Offset Registers
Display/Modify
Printer Attach
Printer Detach
Port Format
Port Detach
Program FLASH Memory

Put RTC Into Power Save
Mode for Storage
ROMboot Enable
ROMboot Disable

Command Line Syntax
MD [S] addr [:count | addr]
[; [B|W|L|S|D|DI]]
MENU
MM addr [; [[B|W|L|S|D] [A] [N]]|[DI]]
MMD range increment [; B|W|L]
MS addr {hexadecimal number} {’string’}
MW addr data [; B|W|L]
NAB
NBH [controller LUN] [device LUN]
[client IP Address] [server IP Address] [string]
NBO [controller LUN] [device LUN]
[client IP Address] [server IP Address] [string]
NIOC
NIOP
NIOT [; [H]|[A]]
NPING controller-LUN device-LUN
source-IP destination-IP [n-packets]
OF [Rn [; A]]
PA [port]
NOPA [port]
PF [port]
NOPF [port]
PFLASH SSADDR SEADDR DSADDR
[IEADDR]
[;[A|R][X]]
or PFLASH SSADDR:COUNT DSADDR
[IEADDR]
[;[B|W|L] [A|R] [X]]
PS
RB [; V]
NORB

Computer Group Literature Center Web Site

The 172Bug Debugger Command Set

Table 4-3. Debugger Commands (Continued)
Command
Mnemonic
RD
REMOTE
RESET
RL
RM
RS
SD
SET
SYM
NOSYM
SYMS
T
TA
TC
TIME
TM
TT
VE
VER
WL

Title
Register Display
Connect the Remote Modem
to CSO
Cold/Warm Reset
Read Loop
Register Modify
Register Set
Switch Directories
Set Time and Date
Symbol Table Attach
Symbol Table Detach
Symbol Table Display/Search
Trace
Terminal Attach
Trace on Change of Control
Flow
Display Time and Date
Transparent Mode
Trace to Temporary
Breakpoint
Verify S-Records Against
Memory
Display Revision/Version
Write Loop

http://www.mcg.mot.com/literature

Command Line Syntax
RD {[+|-|=] [dname] [/]} {[+|-|=]
[reg1[-reg2]] [/]} [; E]
REMOTE

4-25

AConfigure and Environment
Commands

Configure Board Information Block
CNFG [;[I][M]]

This command is used to display and configure the board information
block. This block is resident within the Non-Volatile RAM (NVRAM).
Refer to the Debugging Package for Motorola 68K CISC CPUs User’s
Manual for the actual location. The information block contains various
elements detailing specific operation parameters of the hardware. The
Debugging Package for Motorola 68K CISC CPUs User’s Manual
describes the elements within the board information block, and lists the
size and logical offset of each element. The CNFG command does not
describe the elements and their use. The board information block contents
are checksummed for validation purposes. This checksum is the last
element of the block.
Although the factory fills all fields except the IndustryPack fields, only
these fields MUST contain correct information:
❏

MPU clock speed

❏

Ethernet address

❏

Local SCSI identifier

Example: to display the current contents of the board information block.
172-Bug>cnfg
Board (PWA) Serial Number = "000000061050"
Board Identifier
= "MVME172-513A
"
Artwork (PWA) Identifier = "01-W3960B01A
"
MPU Clock Speed
= "3200"
Ethernet Address
= 08003E20A867
Local SCSI Identifier
= "07"
Parity Memory Mezzanine Artwork (PWA) Identifier = "
Parity Memory Mezzanine (PWA) Serial Number
= "
Static Memory Mezzanine Artwork (PWA) Identifier = "

"
"
"

A-1

Configure Board Information Block

Static Memory Mezzanine (PWA) Serial Number
= "
ECC Memory Mezzanine #1 Artwork (PWA) Identifier = "
ECC Memory Mezzanine #1 (PWA) Serial Number
= "
ECC Memory Mezzanine #2 Artwork (PWA) Identifier = "
ECC Memory Mezzanine #2 (PWA) Serial Number
= "
Serial Port 2 Personality Artwork (PWA) Identifier = "
Serial Port 2 Personality Module (PWA) Serial Number = "
IndustryPack A Board Identifier
= "
"
IndustryPack A (PWA) Serial Number
= "
"
IndustryPack A Artwork (PWA) Identifier = "
"
IndustryPack B Board Identifier
= "
"
IndustryPack B (PWA) Serial Number
= "
"
IndustryPack B Artwork (PWA) Identifier = "
"
IndustryPack C Board Identifier
= "
"
IndustryPack C (PWA) Serial Number
= "
"
IndustryPack C Artwork (PWA) Identifier = "
"
IndustryPack D Board Identifier
= "
"
IndustryPack D (PWA) Serial Number
= "
"
IndustryPack D Artwork (PWA) Identifier = "
"
172-Bug>

"
"
"
"
"
"
"

Note that the parameters that are quoted are left-justified character (ASCII)
strings padded with space characters, and the quotes (") are displayed to
indicate the size of the string. Parameters that are not quoted are
considered data strings, and data strings are right-justified. The data strings
are padded with zeroes if the length is not met.
In the event of corruption of the board information block, the command
displays a question mark "?" for nondisplayable characters. A warning
message (WARNING: Board Information Block Checksum Error) is
also displayed in the event of a checksum failure.
Using the I option initializes the unused area of the board information
block to zero.
Modification is permitted by using the M option of the command. At the
end of the modification session, you are prompted for the update to NonVolatile RAM (NVRAM). A Y response must be made for the update to
occur; any other response terminates the update (disregards all changes).
The update also recalculates the checksum.

A-2

Computer Group Literature Center Web Site

Configure and Environment Commands

Be cautious when modifying parameters. Some of these parameters are set
up by the factory, and correct board operation relies upon these
parameters.
Once modification/update is complete, you can now display the current
contents as described earlier.

Set Environment to Bug/Operating System
ENV [;[D]]

The ENV command allows you to interactively view/configure all Bug
operational parameters that are kept in Battery Backed Up RAM
(BBRAM), also known as Non-Volatile RAM (NVRAM). The operational
parameters are saved in NVRAM and used whenever power is lost.
Any time the Bug uses a parameter from NVRAM, the NVRAM contents
are first tested by checksum to insure the integrity of the NVRAM
contents. In the instance of BBRAM checksum failure, certain default
values are assumed as stated below.
The bug operational parameters (which are kept in NVRAM) are not
initialized automatically on power up/warm reset. It is up to the Bug user
to invoke the ENV command. Once the ENV command is invoked and
executed without error, Bug default and/or user parameters are loaded into
NVRAM along with checksum data.
If any of the operational parameters have been modified, the new
parameters do not go into effect until a reset/powerup condition occurs.
Should you determine that the NVRAM contents have been corrupted, use
a double-button reset (described under Restarting the System in Chapter 3)
to reinitialize the system.
If the ENV command is invoked with no options on the command line, you
are prompted to configure all operational parameters. If the ENV command
is invoked with the option D, ROM defaults will be loaded into NVRAM.
The parameters to be configured are listed in the following table:

http://www.mcg.mot.com/literature

A-3

Set Environment to Bug/Operating System

Table A-1. ENV Command Parameters
ENV Parameter and Options

Default

Meaning of Default

Bug or System environment [B/S]

Bug mode

Field Service Menu Enable [Y/N]

Do not display field service
menu.

Remote Start Method Switch [G/M/B/N]

Use both methods (Global
Control and Status Register
(GCSR) in the VMEchip2,
and the Multiprocessor
Control Register (MPCR) in
shared RAM) to pass and
start execution of crossloaded programs.

Probe System for Supported I/O Controllers [Y/N]

Accesses will be made to the
appropriate system busses
(e.g., VMEbus, local bus) to
determine presence of
supported controllers.

Negate VMEbus SYSFAIL* Always [Y/N]

Negate VMEbus SYSFAIL
after successful completion or
entrance into the bug
command monitor.

Local SCSI Bus Reset on Debugger Startup [Y/N]

Local SCSI bus is not reset on
debugger startup.

Local SCSI Bus Negotiations Type [A/S/N]

Asynchronous

Industry Pack Reset on Debugger Startup [Y/N]

Industry Pack(s) is/are reset
on debugger startup.

Ignore CFGA Block on a Hard Disk Boot [Y/N]

Enable the ignorance of the
Configuration Area (CFGA)
Block (hard disk only).

Auto Boot Enable [Y/N]

Auto Boot function is
disabled.

Auto Boot at power-up only [Y/N]

Auto Boot is attempted at
power-up reset only.

Auto Boot Controller LUN

LUN of a disk/tape controller
module currently supported
by the Bug. Default is $0.

A-4

Computer Group Literature Center Web Site

Configure and Environment Commands

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options

Default

Meaning of Default

Auto Boot Device LUN

LUN of a disk/tape device
currently supported by the
Bug. Default is $0.

Auto Boot Abort Delay

The time in seconds that the
Auto Boot sequence will
delay before starting the boot.
The purpose for the delay is
to allow you the option of
stopping the boot by use of
the Break key. The time value
is from 0 through 255
seconds.

Auto Boot Default String [Y(NULL
String)/(String)]

You may specify a string
(filename) which is passed on
to the code being booted.
Maximum length is 16
characters. Default is the null
string.

ROM Boot Enable [Y/N]

ROMboot function is
disabled.

ROM Boot at power-up only [Y/N]

ROMboot is attempted at
power up only.

ROM Boot Enable search of VMEbus [Y/N]

VMEbus address space will
not be accessed by ROMboot.

ROM Boot Abort Delay

The time in seconds that the
ROMboot sequence will
delay before starting the boot.
The purpose for the delay is
to allow you the option of
stopping the boot by use of
the Break key. The time value
is from 0 through 255
seconds.

FF800000

First location tested when the
Bug searches for a ROMboot
Module.

ROM Boot Direct Starting Address

http://www.mcg.mot.com/literature

A-5

Set Environment to Bug/Operating System

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options
ROM Boot Direct Ending Address

Default

Meaning of Default

FFDFFFFC Last location tested when the
Bug searches for a ROMboot
Module.

Network Auto Boot Enable [Y/N]

Network Auto Boot function
is disabled.

Network Auto Boot at power-up only [Y/N]

Network Auto Boot is
attempted at power up reset
only.

Network Auto Boot Controller LUN

LUN of a disk/tape controller
module currently supported
by the Bug. Default is $0.

Network Auto Boot Device LUN

LUN of a disk/tape device
currently supported by the
Bug. Default is $0.

Network Auto Boot Abort Delay

This is the time in seconds
that the Network Boot
sequence will delay before
starting the boot. The purpose
for the delay is to allow you
the option of stopping the
boot by use of the Break key.
The time value is from 0
through 255 seconds.

00000000

The address where the
network interface
configuration parameters are
to be saved/retained in
NVRAM; these parameters
are the necessary parameters
to perform an unattended
network boot.
If you are using NVRAM
space for your own program
information or commands,
change the default pointer
value to the value necessary
to clear your data.

Network Autoboot Configuration Parameters
Pointer (NVRAM)

A-6

Computer Group Literature Center Web Site

Configure and Environment Commands

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options

Default

Meaning of Default

Memory Search Starting Address

00000000

Where the Bug begins to
search for a work page (a
64KB block of memory) to
use for vector table, stack,
and variables. This must be a
multiple of the debugger
work page, modulo $10000
(64KB). In a multi-172
environment, each
MVME172 board could be
set to start its work page at a
unique address to allow
multiple debuggers to operate
simultaneously.

Memory Search Ending Address

00100000

Top limit of the Bug’s search
for a work page. If a
contiguous block of memory,
64KB in size, is not found in
the range specified by
Memory Search Starting
Address and Memory Search
Ending Address parameters,
then the bug will place its
work page in the onboard
static RAM on the
MVME172. Default Memory
Search Ending Address is the
calculated size of local
memory.

http://www.mcg.mot.com/literature

A-7

Set Environment to Bug/Operating System

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options
Memory Search Increment Size

Memory Search Delay Enable [Y/N]

A-8

Default

Meaning of Default

00010000

A multi-CPU feature used to
offset the location of the Bug
work page. This must be a
multiple of the debugger
work page, modulo $10000
(64KB). Typically, Memory
Search Increment Size is the
product of CPU number and
size of the Bug work page.
Example: first CPU $0 (0 x
$10000), second CPU $10000
(1 x $10000), etc.

No delay before the Bug
begins its search for a work
page.

Computer Group Literature Center Web Site

Configure and Environment Commands

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options
Memory Search Delay Address

Memory Size Enable [Y/N]

Default

Meaning of Default

FFFFD20F Default address is
$FFFFD20F. This is the
MVME172 GCSR GPCSR0
as accessed through VMEbus
A16 space and assumes the
MVME172 GRPAD (group
address) and BDAD (board
address within group)
switches are set to "on". This
byte-wide value is initialized
to $FF by MVME172
hardware after a System or
Power-on Reset. In a multi172 environment, where the
work pages of several Bugs
are to reside in the memory of
the primary (first)
MVME172, the non-primary
CPUs will wait for the data at
the Memory Search Delay
Address to be set to $00, $01,
or $02 (refer to the Memory
Requirements section in
Chapter 3 for the definition of
these values) before
attempting to locate their
work page in the memory of
the primary CPU.
Y

Memory will be sized for Self
Test diagnostics.

Memory Size Starting Address

00000000

Default Starting Address is
$0.

Memory Size Ending Address

00100000

Default Ending Address is the
calculated size of local
memory.

http://www.mcg.mot.com/literature

A-9

Set Environment to Bug/Operating System

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options

Default

Meaning of Default

Base Address of Dynamic Memory

00000000

Beginning address of
Dynamic Memory (Parity
and/or ECC type memory). It
must be a multiple of the
Dynamic Memory board size,
starting with 0. Default is $0.

Size of Parity Memory

00100000

Size of the Parity type
dynamic RAM mezzanine, if
any. The default is the
calculated size of the
Dynamic memory mezzanine
board.

Size of ECC Memory Board #0

00000000

Size of the first ECC type
memory mezzanine. The
default is the calculated size
of the memory mezzanine.

Size of ECC Memory Board #1

00000000

Size of the second ECC type
memory mezzanine. The
default is the calculated size
of the memory mezzanine.

Base Address of Static Memory

FFE00000

The beginning address of
SRAM. The default for this
parameter is FFE00000 for
the onboard 512KB.

Size of Static Memory

00080000

Size of the SRAM type
memory present. The default
is the calculated size of the
onboard SRAM.

ENV asks the following series of questions to set up the VMEbus interface for the MVME172
series modules. You should have a working knowledge of the VMEchip2 as given in the
MVME172 VME Embedded Controller Programmer’s Reference Guide in order to perform this
configuration. Also included in this series are questions for setting ROM and Flash access time.
The slave address decoders are used to allow another VMEbus master to access a local resource of
the MVME172. There are two slave address decoders set. They are set up as follows:
Slave Enable #1 [Y/N]

A-10

Yes, set up and enable the
Slave Address Decoder #1.

Computer Group Literature Center Web Site

Configure and Environment Commands

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options

Default

Meaning of Default

Slave Starting Address #1

00000000

Base address of the local
resource that is accessible by
the VMEbus. Default is the
base of local memory, $0.

Slave Ending Address #1

000FFFFF

Ending address of the local
resource that is accessible by
the VMEbus. Default is the
end of calculated memory.

Slave Address Translation Address #1

00000000

Register that allows the
VMEbus address and the
local address to be different.
The value in this register is
the base address of local
resource that is associated
with the starting and ending
address selection from the
previous questions. Default is
0.

Slave Address Translation Select #1

00000000

Register that defines which
bits of the address are
significant. A logical one "1"
indicates significant address
bits, logical zero "0" is nonsignificant. Default is 0.

03FF

Defines the access restriction
for the address space defined
with this slave address
decoder. Default is $03FF.

Do not set up and enable the
Slave Address Decoder #2.

Slave Starting Address #2

00000000

Base address of the local
resource that is accessible by
the VMEbus. Default is 0.

Slave Ending Address #2

00000000

Ending address of the local
resource that is accessible by
the VMEbus. Default is 0.

Slave Control #1

Slave Enable #2 [Y/N]

http://www.mcg.mot.com/literature

A-11

Set Environment to Bug/Operating System

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options

Default

Meaning of Default

Slave Address Translation Address #2

00000000

Works the same as Slave
Address Translation Address
#1. Default is 0.

Slave Address Translation Select #2

00000000

Works the same as Slave
Address Translation Select
#1. Default is 0.

Slave Control #2

0000

Defines the access restriction
for the address space defined
with this slave address
decoder. Default is $0000.

Yes, set up and enable the
Master Address Decoder #1.

Master Starting Address #1

02000000

Base address of the VMEbus
resource that is accessible
from the local bus. Default is
the end of calculated local
memory, unless memory is
less than 16MB, then this
register will always be set to
01000000.

Master Ending Address #1

EFFFFFFF Ending address of the
VMEbus resource that is
accessible from the local bus.
Default is the end of
calculated memory.

Master Enable #1 [Y/N]

Master Control #1

Defines the access
characteristics for the address
space defined with this master
address decoder. Default is
$0D.

Master Enable #2 [Y/N]

Do not set up and enable the
Master Address Decoder #2.

00000000

Base address of the VMEbus
resource that is accessible
from the local bus. Default is
$00000000.

Master Starting Address #2

A-12

Computer Group Literature Center Web Site

Configure and Environment Commands

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options

Default

Meaning of Default

00000000

Ending address of the
VMEbus resource that is
accessible from the local bus.
Default is $00000000.

Defines the access
characteristics for the address
space defined with this master
address decoder. Default is
$00.

Depends on
calculated
size of local
RAM

Yes, set up and enable the
Master Address Decoder #3.
This is the default if the board
contains less than 16MB of
calculated RAM.
Do not set up and enable the
Master Address Decoder #3.
This is the default for boards
containing at least 16MB of
calculated RAM.

Master Starting Address #3

00000000

Base address of the VMEbus
resource that is accessible
from the local bus. If enabled,
the value is calculated as one
more than the calculated size
of memory. If not enabled, the
default is $00000000.

Master Ending Address #3

00000000

Ending address of the
VMEbus resource that is
accessible from the local bus.
If enabled, the default is
$00FFFFFF, otherwise
$00000000.

Master Ending Address #2

Master Control #2

Master Enable #3 [Y/N]

http://www.mcg.mot.com/literature

A-13

Set Environment to Bug/Operating System

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options

Default

Meaning of Default

Master Control #3

Defines the access
characteristics for the address
space defined with this master
address decoder. If enabled,
the default is $3D, otherwise
$00.

Master Enable #4 [Y/N]

Do not set up and enable the
Master Address Decoder #4.

Master Starting Address #4

00000000

Base address of the VMEbus
resource that is accessible
from the local bus. Default is
$0.

Master Ending Address #4

00000000

Ending address of the
VMEbus resource that is
accessible from the local bus.
Default is $0.

Master Address Translation Address #4

00000000

Register that allows the
VMEbus address and the
local address to be different.
The value in this register is
the base address of VMEbus
resource that is associated
with the starting and ending
address selection from the
previous questions. Default is
0.

Master Address Translation Select #4

00000000

Register that defines which
bits of the address are
significant. A logical one "1"
indicates significant address
bits, logical zero "0" is nonsignificant. Default is 0.

Defines the access
characteristics for the address
space defined with this master
address decoder. Default is
$00.

Master Control #4

A-14

Computer Group Literature Center Web Site

Configure and Environment Commands

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options

Default

Meaning of Default

Short I/O (VMEbus A16) Enable [Y/N]

Yes, Enable the Short I/O
Address Decoder.

Short I/O (VMEbus A16) Control

Defines the access
characteristics for the address
space defined with the Short
I/O address decoder. Default
is $01.

F-Page (VMEbus A24) Enable [Y/N]

Yes, Enable the F-Page
Address Decoder.

F-Page (VMEbus A24) Control

Defines the access
characteristics for the address
space defined with the F-Page
address decoder. Default is
$02.

ROM Access Time Code

04
(50 MHz
MPU),
or
03
(64 MHz
MPU)

Defines the ROM access
time. The default is:
$04, which sets an access
time of220 ns (25MHz bus
frequency), or
$03, which sets an access
time of 130 ns (32MHz bus
frequency).

Flash Access Time Code

Defines the Flash access time.
The default is $01, which sets
an access time of 100 ns
(25MHz bus frequency) or 70
ns (32MHz bus frequency).

MC2 chip Vector Base
VMEC2 Vector Base #1
VMEC2 Vector Base #2

05
06
07

Base interrupt vector for the
component specified. Default:
MC2 chip = $05, VMEchip2
Vector 1 = $06, VMEchip2
Vector 2 = $07.

http://www.mcg.mot.com/literature

A-15

Set Environment to Bug/Operating System

Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options

Default

Meaning of Default

VMEC2 GCSR Group Base Address

Specifies the group address
($FFFx00) in Short I/O for
this board. Default = $D2.

VMEC2 GCSR Board Base Address

Specifies the base address
($FFFFD2xx) in Short I/O for
this board.
Default = $00.

VMEbus Global Time Out Code

Controls the VMEbus timeout
when systems controller.
Default $01 = 64 µs.

Local Bus Time Out Code

This controls the local bus
timeout.
Default $02 = 256 µs.

VMEbus Access Time Out Code

This controls the local bus to
VMEbus access timeout.
Default $02 = 32 ms.

Configuring the IndustryPacks
ENV asks the following series of questions to set up IndustryPacks (IP) on
MVME172 modules.

The MVME172 VME Embedded Controller Programmer’s Reference
Guide describes the base addresses and the IP register settings. Refer to
that manual for information on setting base addresses and register bits.
IP A Base Address
IP B Base Address
IP C Base Address
IP D Base Address

= 00000000?
= 00000000?
= 00000000?
= 00000000?

Base address for mapping IP modules. Only the upper 16 bits are
significant.
IP D/C/B/A Memory Size

A-16

= 00000000?

Computer Group Literature Center Web Site

Configure and Environment Commands

Define the memory size requirements for the IP modules:
Bits

31-24

FFFBC00F

23-16

FFFBC00E

15-08

FFFBC00D

07-00

FFFBC00C

IP D/C/B/A General Control

= 00000000?

Define the general control requirements for the IP modules:
Bits

31-24

FFFBC01B

23-16

FFFBC01A

15-08

FFFBC019

07-00

FFFBC018

IP D/C/B/A Interrupt 0 Control = 00000000?
Define the interrupt control requirements for the IP modules channel 0:
Bits

31-24

FFFBC016

23-16

FFFBC014

15-08

FFFBC012

07-00

FFFBC010

http://www.mcg.mot.com/literature

A-17

Set Environment to Bug/Operating System

IP D/C/B/A Interrupt 1 Control = 00000000?
Define the interrupt control requirements for the IP modules channel 1:

!
Caution

A-18

Bits

31-24

FFFBC017

23-16

FFFBC015

15-08

FFFBC013

07-00

FFFBC011

Before environment parameters are saved in the NVRAM, a
warning message will appear if the user has specified environment
parameters which will cause an overlap condition. The important
information about each configurable element in the memory map is
displayed, showing where any overlap conditions exist. This will
allow the user to quickly identify and correct an undesirable
configuration before it is saved.

Computer Group Literature Center Web Site

Configure and Environment Commands

ENV warning example:
WARNING: Memory MAP Overlap Condition Exists
S-Address
$00000000
$FFE00000
$01000000
$00000000
$00000000
$00000000
$F0000000
$FFFF0000
$FF800000
$FFF00000
$00000000
$00000000
$00000000
$00000000
$00000000
$00000000

E-Address
$FFFFFFFF
$FFE7FFFF
$EFFFFFFF
$00000000
$00FFFFFF
$00000000
$FF7FFFFF
$FFFFFFFF
$FFBFFFFF
$FFFEFFFF
$00000000
$00000000
$00000000
$00000000
$00000000
$00000000

Enable
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Yes
Yes
No
No
No
No
No
No

http://www.mcg.mot.com/literature

Overlap
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Yes
Yes
No
No
No
No
No
No

M-Type
Master
Master
Master
Master
Master
Master
Master
Master
Master
Master
Master
Master
Master
Master
Slave
Slave

Memory-MAP-Name
Local Memory (Dynamic RAM)
Static RAM
VMEbus Master #1
VMEbus Master #2
VMEbus Master #3
VMEbus Master #4
VMEbus F Pages (A24/A32)
VMEbus Short I/O (A16)
Flash/PROM
Local I/O
Industry Pack A
Industry Pack B
Industry Pack C
Industry Pack D
VMEbus Slave #1
VMEbus Slave #2

A-19

BSerial Interconnections

Introduction
As described in previous chapters of this manual, one of the MVME172’s
two serial ports (port A internally, SERIAL PORT 1/CONSOLE on the front
panel) is an EIA-232-D DCE port exclusively. The second port (port B
internally, SERIAL PORT 2 on the front panel) can be configured via serial
interface modules as an EIA-232-D DCE/DTE, an EIA-530 DCE/DTE
port, an EIA-485 port, or an EIA-422 DCE/DTE port.
The MVME172 uses a Zilog Z85230 serial port controller to implement
the two serial communications interfaces. Each interface supports CTS,
DCD, RTS, and DTR control signals as well as the TxD and RxD
transmit/receive data signals, and TxC/RxC synchronous clock signals.
The Z85230 supports synchronous (SDLC/HDLC) and asynchronous
protocols. The MVME172 hardware supports asynchronous serial baud
rates of 110B/sec to 38.4KB/sec.

EIA-232-D Connections
The EIA-232-D standard defines the electrical and mechanical aspects of
this serial interface. The interface employs unbalanced (single-ended)
signaling and is generally used with DB-25 connectors, although other
connector styles (e.g., DB-9 and RJ-45) are sometimes used as well.
Table A-1 lists the standard EIA-232-D interconnections. Not all pins
listed in the table are necessary in every application.
To interpret the information correctly, remember that the EIA-232-D serial
interface was developed to connect a terminal to a modem. Serial data
leaves the sending device on a Transmit Data (TxD) line and arrives at the
receiving device on a Receive Data (RxD) line. When computing
equipment is interconnected without modems, one of the units must be
configured as a terminal (data terminal equipment: DTE) and the other as

B-1

EIA-232-D Connections

a modem (data circuit-terminating equipment: DCE). Since computers are
normally configured to work with terminals, they are said to be configured
as a modem in most cases.

Table B-1. EIA-232-D Interconnections
Pin
Number

Signal
Mnemonic

Not used.

TxD

Transmit Data. Data to be transmitted; input to modem from terminal.

RxD

Receive Data. Data which is demodulated from the receive line; output from
modem to terminal.

RTS

Request To Send. Input to modem from terminal when required to transmit a
message. With RTS off, the modem carrier remains off. When RTS is turned on,
the modem immediately turns on the carrier.

CTS

Clear To Send. Output from modem to terminal to indicate that message
transmission can begin. When a modem is used, CTS follows the off-to-on
transition of RTS after a time delay.

DSR

Data Set Ready. Output from modem to terminal to indicate that the modem is
ready to send or receive data.

Signal Ground. Common return line for all signals at the modem interface.

DCD

Data Carrier Detect. Output from modem to terminal to indicate that a valid
carrier is being received.

TxC

Transmit Clock (DCE). Output from modem to terminal; clocks data from the
terminal to the modem.

RxC

Receive Clock. Output from terminal to modem; clocks input data from the
terminal to the modem.

9-14
15

Not used.

16
17

Not used.

18, 19
20
21

B-2

Signal Name and Description

Not used.
DTR

Data Terminal Ready. Input to modem from terminal; indicates that the
terminal is ready to send or receive data.
Not used.

Computer Group Literature Center Web Site

Serial Interconnections

Table B-1. EIA-232-D Interconnections (Continued)
Pin
Number
22

Signal
Mnemonic

Signal Name and Description

Ring Indicator. Output from modem to terminal; indicates that an incoming
call is present. The terminal causes the modem to answer the phone by carrying
DTR true while RI is active.

TxC

Transmit Clock (DTE). Input to modem from terminal; same function as TxC
on pin 15.

BSY

Busy. Input to modem from terminal; a positive EIA signal applied to this pin
causes the modem to go off-hook and make the associated phone busy.

Not used.

Notes 1. A high EIA-232-D signal level is +3 to +15 volts. A low level is
–3 to –15 volts. Connecting units in parallel may produce out-of-range
voltages and is contrary to specifications.
2. The EIA-232-D interface is intended to connect a terminal to a modem.
When computers are connected without modems, one computer must
be configured as a modem and the other as a terminal.

http://www.mcg.mot.com/literature

B-3

EIA-232-D Connections

Interface Characteristics
The EIA-232-D interface standard specifies all parameters for serial binary
data interchange between DTE and DCE devices using unbalanced lines.
EIA-232-D transmitter and receiver parameters applicable to the
MVME172 are listed in Tables A-2 and A-3.

Table B-2. EIA-232-D Interface Transmitter Characteristics
Value
Minimum Maximum

Parameter

±8.5

Output voltage (with load resistance of 3000Ω to 7000Ω)

V
±12

Open circuit output voltage

±100

Short circuit output current (to ground or any other interconnection
cable conductor)
Power off output resistance

300

Output transition time (for a transition region of –3V to +3V and
with total load capacitance, including connection cable, of less than
2500pF)

V
mA
W

Open circuit slew rate

Unit

µs

V/µs

Table B-3. EIA-232-D Interface Receiver Characteristics
Parameter

Value
Minimum Maximum

Unit

Input signal voltage

±25

Input high threshold voltage

2.25

Input low threshold voltage
Input hysteresis
Input impedance (–15V < Vin < +15V)

B-4

0.75

1.0

3000

7000

Computer Group Literature Center Web Site

Serial Interconnections

The MVME172 conforms to EIA-232-D specifications. Note that although
the EIA-232-D standard recommends the use of short interconnection
cables not more than 50 feet (15m) in length, longer cables are permissible
provided the total load capacitance measured at the interface point and
including signal terminator does not exceed 2500pF.

EIA-530 Connections
The EIA-530 interface complements the EIA-232-D interface in function.
The EIA-530 standard defines the mechanical aspects of this interface,
which is used for transmission of serial binary data, both synchronous and
asynchronous. It is adaptable to balanced (double-ended) as well as
unbalanced (single-ended) signaling and offers the possibility of higher
data rates than EIA-232-D with the same DB-25 connector.
Table A-4 lists the EIA-530 interconnections that are available at serial
port B (SERIAL PORT 2 on the front panel) when the port is configured via
serial interface modules as an EIA-530 DCE or DTE port.
Table B-4. Serial Port B EIA-530 Interconnect Signals
Pin
Number

Signal
Mnemonic

Signal Name and Description
Not used.

TxD_A

Transmit Data (A). Data to be transmitted; output from DTE to DCE.

RxD_A

Receive Data (A). Data which is demodulated from the receive line; input from
DCE to DTE.

RTS_A

Request to Send (A). Output from DTE to DCE when required to transmit a
message.

CTS_A

Clear to Send (A). Input to DTE from DCE to indicate that message
transmission can begin.

DSR_A

Data Set Ready (A). Input to DTE from DCE to indicate that the DCE is ready
to send or receive data. In DCE configuration, always true.

SIG GND

Signal Ground. Common return line for all signals.

DCD_A

Data Carrier Detect (A). Receive line signal detector output from DCE to DTE
to indicate that valid data is being transferred to the DTE on the RxD line.

RxC_B

Receive Signal Element Timing—DCE (B). Control signal that clocks input
data.

http://www.mcg.mot.com/literature

B-5

EIA-530 Connections

Table B-4. Serial Port B EIA-530 Interconnect Signals (Continued)

Pin
Number

B-6

Signal
Mnemonic

Signal Name and Description

DCD_B

Data Carrier Detect (B). Receive line signal detector output from DCE to DTE
to indicate that valid data is being transferred to the DTE on the RxD line.

TxCO_B

Transmit Signal Element Timing—DTE (B). Control signal that clocks output
data.

TxC_B

Transmit Signal Element Timing—DCE (B). Control signal that clocks input
data.

CTS_B

Clear to Send (B). Input to DTE from DCE to indicate that message
transmission can begin.

TxD_B

Transmit Data (B). Data to be transmitted; output from DTE to DCE.

TxC_A

Transmit Signal Element Timing—DCE (A). Control signal that clocks input
data.

RxD_B

Receive Data (B). Data which is demodulated from the receive line; input from
DCE to DTE.

RxC_A

Receive Signal Element Timing—DCE (A). Control signal that clocks input
data.

LL_A

Local Loopback (A). Reroutes signal within local DCE. In DTE configuration,
always tied inactive and driven false. In DCE configuration, ignored.

RTS_B

Request to Send (B). Output from DTE to DCE when required to transmit a
message.

DTR_A

Data Terminal Ready (A). Output from DTE to DCE indicating that the DTE
is ready to send or receive data.

RL_A

Remote Loopback (A). Reroutes signal within remote DCE. In DTE
configuration, always tied inactive and driven false. In DCE configuration,
ignored.

DSR_B

Data Set Ready (B). Input to DTE from DCE to indicate that the DCE is ready
to send or receive data. In DCE configuration, always true.

DTR_B

Data Terminal Ready (B). Output from DTE to DCE indicating that the DTE is
ready to send or receive data.

TxCO_A

Transmit Signal Element Timing—DTE (A). Control signal that clocks output
data.

TM_A

Test Mode (A). Indicates whether the local DCE is under test. In DTE
configuration, ignored. In DCE configuration, always tied inactive and driven
false.

Computer Group Literature Center Web Site

Serial Interconnections

Interface Characteristics

In specifying parameters for serial binary data interchange between DTE
and DCE devices, the EIA-530 standard assumes the use of balanced lines,
except for the Remote Loopback, Local Loopback, and Test Mode lines,
which are single-ended. Balanced-line data interchange is generally
employed in preference to unbalanced-line data interchange where any of
the following conditions prevail:
❏

The interconnection cable is too long for effective unbalanced
operation.

❏

The interconnection cable is exposed to extraneous noise sources
that may cause an unwanted voltage in excess of ±1V measured
differentially between the signal conductor and circuit ground at the
load end of the cable, with a 50Ω resistor substituted for the
transmitter.

❏

It is necessary to minimize interference with other signals.

❏

Inversion of signals may be required (e.g., plus polarity MARK to
minus polarity MARK may be achieved by inverting the cable pair).

EIA-530 interface transmitter and receiver parameters applicable to the
MVME172 are listed in Tables A-5 and A-6.

Table B-5. EIA-530 Interface Transmitter Characteristics
Parameter
Differential output voltage (absolute, with 100Ω load)

Value
Minimum Maximum
2.0

Unit
V

Open circuit differential voltage output (absolute)

6.0

Output offset voltage (with 100Ω load)

3.0

Short circuit output current (for any voltage between –7V and +7V)

±180

Power off output current (for any voltage between
–7V and +7V)

±100

µA

Output transition time (with 100Ω, 15pF load)

http://www.mcg.mot.com/literature

B-7

EIA-485/EIA-422 Connections

B
Table B-6. EIA-530 Interface Receiver Characteristics
Value
Minimum Maximum

Parameter

Unit

Differential input voltage

±12

Input offset voltage

±12

Differential input high threshold voltage

200

Differential input low threshold voltage

–200

Differential input hysteresis

Input impedance (without termination resistors)

KΩ

EIA-485/EIA-422 Connections
The EIA-485 and EIA-422 standards define a balanced (double-ended)
electrical interface, which is used for transmission of serial binary data,
both synchronous and asynchronous. As used here, they use the same DB25 connector and pin assignments as does EIA-530. EIA-485 is a low cost
differential multidrop driver and receiver standard. The quadruple
differential line drivers and receivers that are used in this module are tristate. They meet the requirements of EIA-485 and EIA-422.
Table A-7 lists the EIA-485/EIA-422 interconnections that are available at
serial port B (SERIAL PORT 2 on the front panel) when the port is
configured via serial interface modules as an EIA-485 port or as an EIA422 DCE or DTE port.

B-8

Computer Group Literature Center Web Site

Serial Interconnections

Table B-7. Serial Port B EIA-485/EIA-422 Interconnect Signals
Pin
Number

Signal
Mnemonic

Signal Name and Description
Not used.

TxD_A

Transmit Data (A). Data to be transmitted; output from DTE to DCE.

RxD_A

Receive Data (A). Data which is demodulated from the receive line; input from
DCE to DTE.

Not used.

6
7

Not used.
SIG GND

8
9

Signal Ground. Common return line for all signals.
Not used.

RxC_B

Receive Signal Element Timing—DCE (B). Control signal that clocks input
data.

Not used.

TxC_B

Transmit Signal Element Timing—DCE (B). Control signal that clocks input
data.

TxD_B

Transmit Data (B). Data to be transmitted; output from DTE to DCE.

TxC_A

Transmit Signal Element Timing—DCE (A). Control signal that clocks input
data.

RxD_B

Receive Data (B). Data which is demodulated from the receive line; input from
DCE to DTE.

RxC_A

Receive Signal Element Timing—DCE (A). Control signal that clocks input
data.

Not used.

http://www.mcg.mot.com/literature

B-9

EIA-485/EIA-422 Connections

Interface Characteristics
In specifying parameters for serial binary data interchange between DTE
and DCE devices, the EIA-485/EIA-422 standard assumes the use of
balanced lines. Balanced-line data interchange is generally employed in
preference to unbalanced-line data interchange where any of the following
conditions prevail:
❏

The interconnection cable is too long for effective unbalanced
operation.

❏

The interconnection cable is exposed to extraneous noise sources
that may cause an unwanted voltage in excess of ±1V measured
differentially between the signal conductor and circuit common at
the load end of the cable, with a 50Ω resistor substituted for the
generator.

❏

It is necessary to minimize interference with other signals.

❏

Inversion of signals may be required (e.g., plus polarity MARK to
minus polarity MARK may be achieved by inverting the cable pair).

EIA-485 interface transmitter (generator) and receiver (load) parameters
applicable to the MVME172 are listed in Tables A-8 and A-9.

Table B-8. EIA-485 Interface Transmitter (Generator) Characteristics
Value

Parameter

Minimum Maximum

Differential output voltage (absolute, with 100Ω ± 1% load)

2.0

Unit
V

Open circuit differential voltage output (absolute)

6.0

Output offset voltage (with 100Ω ± 1% load)

3.0

Short circuit output current

±180

Power off output current (for any voltage between
–0.25V and +6.0V)

±100

µA

120

Output transition time (with 54Ω ± 1% load)

B-10

Computer Group Literature Center Web Site

Serial Interconnections

Table B-9. EIA-485 Interface Receiver (Load) Characteristics
Parameter

Value
Minimum Maximum

B
Unit

Differential input voltage

±12

Input offset voltage

±12

Differential input high threshold voltage
Differential input low threshold voltage
Differential input hysteresis
Input impedance (without termination resistors)

+200

–200

50 (typical)

KΩ

Proper Grounding
An important subject to consider is the use of ground pins. There are two
pins labeled GND. Pin 7 is the signal ground and must be connected to the
distant device to complete the circuit. Pin 1 is the chassis ground, but it
must be used with care. The chassis is connected to the power ground
through the green wire in the power cord and must be connected to be in
compliance with the electrical code.
The problem is that when units are connected to different electrical outlets,
there may be several volts of difference in ground potential. If pin 1 of each
device is interconnected with the others via cable, several amperes of
current could result. This condition may not only be dangerous for the
small wires in a typical cable, but may also produce electrical noise that
causes errors in data transmission. That is why Tables A-1, A-4, and A-7
show no connection for pin 1. Normally, pin 7 (signal ground) should only
be connected to the chassis ground at one point; if several terminals are
used with one computer, the logical place for that point is at the computer.
The terminals should not have a connection between the logic ground
return and the chassis.

http://www.mcg.mot.com/literature

B-11

CIndustryPack Interconnections

Introduction
Up to four IndustryPack (IP) modules may be installed on the MVME172.
For each IP module, there are two 50-pin plug connectors on the
MVME172: J4/J5, J10/J11, J20/J21, and J29/J30. For external cabling to
the IP modules, four 50-pin IDC connectors (J7, J8, J26, and J27) are
provided behind the MVME172 front panel. Pin assignments are the same
for both types of connectors. The following table lists the pin numbers,
signal mnemonics, and signal descriptions for the IndustryPack logic
interface.
Pin
Number

Signal
Mnemonic

GND

Ground. First of four ground pins. Serves as zero-volt reference for logic
signals, and as return path for the power supplies furnishing operating voltages
to the IndustryPack.

CLK

Clock. An 8 MHz clock signal supplied to the IndustryPack by the MVME172.
Synchronizes all data transfers to or from the IndustryPack.

Reset*

Reset. Driven by the MVME172 to the IndustryPack to halt all IP activity and
reset the IP circuitry to a known state.

4-19

D0-D15

Data Bus (bits 0-15). The 16 lines of the data bus used to read and write data
between the MVME172 and the IndustryPack.

20, 21

Signal Name and Description

BS0*, BS1* Byte Select. Byte select lines; used on 16-bit IPs to support byte writes. BS0*
selects the low or odd byte (D0-D7). BS1* selects the high or even byte (D8D15).

–12V

–12 Vdc Power. Used primarily to power IndustryPack analog and
communication functions.

+12V

+12 Vdc Power. Used primarily to power IndustryPack analog and
communication functions.

+5V

+5 Vdc Power. First of two +5V pins. Primary supply for digital logic
functions on the IndustryPack.

25, 26

GND

Ground. Second and third of four ground pins. Serve as zero-volt reference for
logic signals, and as return path for the power supplies furnishing operating
voltages to the IndustryPack.

C-1

Introduction

Pin
Number

Signal
Mnemonic

+5V

R/W*

Read/Write. Indicates the direction of data movement on the data bus. High
indicates a read cycle (data lines driven by the IP); low indicates a write cycle
(data lines driven by the MVME172).

IDSel*

IndustryPack ID. First of four ‘‘select’’ lines driven by the MVME172 to
enable the IP. This line is used to read a 32-byte ROM containing the IP
identification information. IDSel* is not bussed; the signal is unique to each
IndustryPack.

DMAReq0

DMA Request 0. One of two DMA request lines; driven by the IndustryPack to
indicate that the IP wishes to have a DMA cycle performed on DMA channel 0.

MemSel*

Memory Select. Second of four ‘‘select’’ lines driven by the MVME172 to
enable the IP. This line is used in memory read or write cycles. MemSel* is not
bussed; the signal is unique to each IndustryPack. An IP need not respond to
MemSel* if it has no memory.

DMAReq1

DMA Request 1. One of two DMA request lines; driven by the IndustryPack to
indicate that the IP wishes to have a DMA cycle performed on DMA channel 1.

IntSel*

Interrupt Vector Select. Third of four ‘‘select’’ lines driven by the MVME172
to enable the IP. This line is used in reading the IP’s interrupt vector during an
interrupt acknowledge cycle. IntSel* is not bussed; the signal is unique to each
IndustryPack. An IP need not respond to IntSel* if it has no interrupt requests
asserted.

DMAck*

DMA Acknowledge. DMA acknowledge line driven by the MVME172, used
to qualify DMA cycles. DMAck* is bussed to the four IP connectors.

IOSel*

I/O Select. Fourth of four ‘‘select’’ lines driven by the MVME172 to enable the
IP. This line is used in executing input or output cycles. IOSel* is not bussed;
the signal is unique to each IndustryPack. I/O data width is an IP-specific
function; an IP need not respond to IntSel* if it has no I/O functions.

DMAck1*

Address Line 1. One of six address lines; driven by the MVME172 to address
I/O locations on the IndustryPack module designated by the four ‘‘select’’
lines.

DMAEnd*

DMA Termination. A bidirectional line which can be used to terminate DMA
transfers. It can be asserted either by the DMA controller or by an IndustryPack
module.

Address Line 2. One of six address lines; driven by the MVME172 to address
I/O locations on the IndustryPack module designated by the four ‘‘select’’
lines.

C-2

Signal Name and Description
+5 Vdc Power. Second of two +5V pins. Primary supply for digital logic
functions on the IndustryPack.

DMA Acknowledge 1. Not connected

Computer Group Literature Center Web Site

IndustryPack Interconnections

Pin
Number

Signal
Mnemonic

Error*

Signal Name and Description
IP Error. Asserted by an IndustryPack module in the event of a a nonrecoverable error (e.g., component failure). Less serious errors are signaled by
interrupts.

Address Line 3. One of six address lines; driven by the MVME172 to address
I/O locations on the IndustryPack module designated by the four ‘‘select’’
lines.

IntReq0*

Interrupt Request 0. One of two interrupt request lines; driven by an
IndustryPack to indicate that the IP is requesting service from the MVME172.

Address Line 4. One of six address lines; driven by the MVME172 to address
I/O locations on the IndustryPack module designated by the four ‘‘select’’
lines.

IntReq1*

Interrupt Request 1. One of two interrupt request lines; driven by an
IndustryPack to indicate that the IP is requesting service from the MVME172.

Address Line 5. One of six address lines; driven by the MVME172 to address
I/O locations on the IndustryPack module designated by the four ‘‘select’’
lines.

Strobe*

Function Strobe. Available for use as an input to the IP module by a strobe or
clock signal related to the bus interface logic. Can be connected or
disconnected on the MVME172 via jumper header J19.

Address Line 6. One of six address lines; driven by the MVME172 to address
I/O locations on the IndustryPack module designated by the four ‘‘select’’
lines.

Ack*

+5STBY

+5 Vdc Standby. Second of two +5V pins. Available for standby functions on
the IndustryPack, such as non-volatile memory, real-time clocks, etc.

GND

Ground. Fourth of four ground pins. Serves as zero-volt reference for logic
signals, and as return path for the power supplies furnishing operating voltages
to the IndustryPack.

Data Acknowledge. Asserted by an IndustryPack module to terminate each
data transfer.

http://www.mcg.mot.com/literature

C-3

DDisk/Tape Controller Data

Controller Modules Supported
The following VMEbus disk/tape controller modules are supported by the
172Bug. The default address for each controller type is First Address and
the controller can be addressed by First CLUN during commands BH, BO,
or IOP, or during TRAP #15 calls .DSKRD or .DSKWR. Note that if
another controller of the same type is used, the second one must have its
address changed by its onboard jumpers and/or switches, so that it matches
Second Address and can be called up by Second CLUN.
First
CLUN

First
Address

Second
CLUN

Second
Address

CISC Embedded Controller

$00 (Note
1)

MVME320 - Winchester/Floppy
Controller

$11 (Note
2)

$FFFFB000

$12 (NOTE
2)

$FFFFAC00

MVME323 - ESDI Winchester
Controller

$08

$FFFFA000

$09

$FFFFA200

MVME327A - SCSI Controller

$02

$FFFFA600

$03

$FFFFA700

MVME328 - SCSI Controller

$06

$FFFF9000

$07

$FFFF9800

MVME328 - SCSI Controller

$16

$FFFF4800

$17

$FFFF5800

MVME328 - SCSI Controller

$18

$FFFF7000

$19

$FFFF7800

MVME350 - Streaming Tape Controller

$04

$FFFF5000

$05

$FFFF5100

Controller Type

Notes:
1. If an MVME172 with an SCSI port is used, the MVME172 module has CLUN 0.
2. For MVME172s, the first MVME320 has CLUN $11, and the second MVME320 has CLUN $12.

D-1

Default Configurations

Default Configurations
Note

SCSI Common Command Set (CCS) devices are the only ones tested by
Motorola Computer Group.

CISC Embedded Controllers -- 7 Devices
Controller LUN

Address

Device LUN

$XXXXXXXX

00
10
20
30
40
50
60

Device Type
SCSI Common Command Set
(CCS), which may be any of these:
- Fixed direct access
- Removable flexible direct access
(TEAC style)
- CD-ROM
- Sequential access

MVME320 -- 4 Devices
Controller LUN

D-2

Address

$FFFFB000

$FFFFAC00

Device LUN

0
1
2
3

Device Type
Winchester hard drive
Winchester hard drive
5-1/4" DS/DD 96 TPI floppy drive
5-1/4" DS/DD 96 TPI floppy drive

Computer Group Literature Center Web Site

Disk/Tape Controller Data

MVME323 -- 4 Devices
Controller LUN

Address

$FFFFA000

$FFFFA200

Device LUN

0
1
2
3

Device Type
ESDI Winchester hard drive
ESDI Winchester hard drive
ESDI Winchester hard drive

ESDI Winchester hard drive

MVME327A -- 9 Devices
Controller LUN

Address

$FFFFA600

$FFFFA700

http://www.mcg.mot.com/literature

Device LUN

Device Type

00
10
20
30
40
50
60

SCSI Common Command Set
(CCS), which may be any of these:
- Fixed direct access
- Removable flexible direct access
(TEAC style)
- CD-ROM
- Sequential access

80
81

Local floppy drive
Local floppy drive

D-3

Default Configurations

MVME328 -- 14 Devices
Controller LUN

Address

$FFFF9000

$FFFF9800

$FFFF4800

$FFFF5800

$FFFF7000

$FFFF7800

Device LUN

Device Type

00
08
10
18
20
28
30

SCSI Common Command Set
(CCS), which may be any of these:
- Removable flexible direct access
(TEAC style)
- CD-ROM
- Sequential access

40
48
50
58
60
68
70

Same as above, but these
will only be available if
the daughter card for the
second SCSI channel is present.

MVME350 -- 1 Device
Controller LUN

D-4

Address

$FFFF5000

$FFFF5100

Device LUN

Device Type
QIC-02 streaming tape drive

Computer Group Literature Center Web Site

Disk/Tape Controller Data

IOT Command Parameters
The following table lists the proper IOT command parameters for floppies
used with boards such as the MVME328 and MVME172.
Floppy Types and Formats
DSDD5

PCXT8

PCXT9

PCXT9_
3

PCAT

PS2

SHD

Sector Size
0- 128 1- 256 2- 512
3-1024 4-2048 5-4096 =

Block Size:
0- 128 1- 256 2- 512
3-1024 4-2048 5-4096 =

Sectors/Track

IOT Parameter

Number of Heads =

Number of Cylinders =

Precomp. Cylinder =

Reduced Write Current
Cylinder =

Step Rate Code =

Single/Double DATA
Density =

Single/Double TRACK
Density =

Single/Equal_in_all Track
Zero Density =

Slow/Fast Data Rate =

http://www.mcg.mot.com/literature

D-5

IOT Command Parameters

Floppy Types and Formats
DSDD5

PCXT8

PCXT9

PCXT9_
3

PCAT

PS2

SHD

Number of Physical Sectors

0A00

0280

02D0

05A0

0960

0B40

1680

Number of Logical Blocks
(100 in size)

09F8

0500

05A0

0B40

12C0

1680

2D00

Number of Bytes in Decimal

653312

327680

368460

737280

1228800

147456
0

294912
0

Media Size/Density

5.25/DD

3.5/DD

5.25/HD

3.5/HD

3.5/ED

IOT Parameter
Other Characteristics

Notes
1. All numerical parameters are in hexadecimal unless otherwise noted.
2. The DSDD5 type floppy is the default setting for the debugger.

D-6

Computer Group Literature Center Web Site

ENetwork Controller Data

Network Controller Modules Supported
The following VMEbus network controller modules are supported by the
172Bug. The default address for each type and position is showed to
indicate where the controller must reside to be supported by the 172Bug.
The controllers are accessed via the specified CLUN and DLUNs listed
here. The CLUN and DLUNs are used in conjunction with the debugger
commands NBH, NBO, NIOP, NIOC, NIOT, NPING, and NAB, and also
with the debugger system calls .NETRD, .NETWR, .NETFOPN,
.NETFRD, .NETCFIG, and .NETCTRL.
Controller
Type

Address

Interface
Type

CLUN

DLUN

MVME172

$00

$FFF46000

Ethernet

MVME376

$02

$00

$FFFF1200

Ethernet

MVME376

$03

$00

$FFFF1400

Ethernet

MVME376

$04

$00

$FFFF1600

Ethernet

MVME376

$05

$00

$FFFF5400

Ethernet

MVME376

$06

$00

$FFFF5600

Ethernet

MVME376

$07

$00

$FFFFA400

Ethernet

MVME374

$10

$00

$FF000000

Ethernet

MVME374

$11

$00

$FF100000

Ethernet

MVME374

$12

$00

$FF200000

Ethernet

MVME374

$13

$00

$FF300000

Ethernet

MVME374

$14

$00

$FF400000

Ethernet

MVME374

$15

$00

$FF500000

Ethernet

E-1

FTroubleshooting the MVME172:
Solving Startup Problems

❏

Try these simple troubleshooting steps before calling for help or
sending your CPU board back for repair.

❏

Some of the procedures will return the board to the factory debugger
environment. (The board was tested under these conditions before it
left the factory.)

❏

Selftest may not run in all user-customized environments
Table F-1. Troubleshooting Steps

Condition

Possible Problem

Try This:

I. Nothing works.
No display on the
terminal.

A. If the RUN or
+12V LED is not
lit, the board may
not be getting
correct power.

1. Make sure the system is plugged in.
2. Check that the board is securely installed in its
backplane or chassis.
3. Check that all necessary cables are connected to the
board, per this manual.
4. Check for compliance with System Considerations, in
Chapter 2.
5. Review the Installation and Startup procedures, in
Chapter 2. The step-by-step powerup routine for your
board is in Chapter 3.

B. If the LEDs are 1. The CPU board should be in the first (leftmost) slot if
lit, the board may
it is to be the system controller.
be in the wrong
2. The “system controller” function requires that header
slot.
J2 be set properly. See Chapter 2.
C. The system
Configure the system console terminal according to the
console terminal instructions in Chapter 3.
may be configured
wrong.

F-1

Table F-1. Troubleshooting Steps (Continued)
Condition

II. There is a
display on the
terminal, but input
from the keyboard
has no effect.

Possible Problem

Try This:

A. The keyboard Recheck the keyboard connections and power.
may be connected
incorrectly.
B. Board jumpers Check the board jumpers per this manual.
may be configured
incorrectly.
C. You may have Press the HOLD or PAUSE key again.
invoked flow
If this does not free up the keyboard, type in
control by
^Q
pressing a HOLD (Hold down the CONTROL key and type a “Q”)
or PAUSE key, or
by typing
^S
Also, a HOLD
LED may be lit on
the keyboard.

III. Debug prompt
172-Bug>
does not appear at
powerup, and the
board does not
auto boot.

F-2

A. Debugger
EPROM/Flash
may be missing

1. Disconnect all power from your system.
2. Check that the proper debugger EPROM is installed
per this manual.
B. The board may 3. Remove the jumper from J28, pins 9 and 10. This
need to be reset.
enables use of the EPROM instead of the Flash
memory.
4. Reconnect power. Restart the system.
5. If the debug prompt appears, go to step IV or step V, as
indicated. If the debug prompt does not appear, go to
step VI.

Computer Group Literature Center Web Site

Troubleshooting the MVME172: Solving Startup Problems

Table F-1. Troubleshooting Steps (Continued)
Condition

IV. Debug prompt
172-Bug>
appears at
powerup, but the
board does not
autoboot.

Possible Problem

A. The initial
debugger
environment
parameters may
be set wrong.
B. There may be
some fault in the
board hardware.

Try This:

1. Start the onboard calendar clock and timer. Type in
set mmddyyhhmm
where the characters indicate the month, day, year,
hour, and minute. The date and time will be displayed.

!
Caution

Performing the next step
will change some
parameters that may
affect your system
operation.

2. Type in
env;d
This sets up the default parameters for the debugger
environment.
3. When prompted to Update Non-Volatile RAM, type in
y
4. When prompted to Reset Local System,
type in
y
After a cold start, the debug prompt:
172-Bug>
is displayed.
5. Change to the diagnostic directory by typing:
sd
Now the prompt should be:
172-Diag>

http://www.mcg.mot.com/literature

F-3

Table F-1. Troubleshooting Steps (Continued)
Condition

Possible Problem

Try This:

6. Run selftest by typing in
st
The tests take as much as 10 minutes, depending on
RAM size. They are complete when the prompt
returns. (The onboard selftest is a valuable tool in
isolating defects.)
7. The system may indicate that it has passed all the
selftests. Or, it may indicate a test that failed. If neither
happens, enter
de
Any errors should now be displayed. If there are any
errors, go to step VI. If there are no errors, go to step V.

V. The debugger is A. No problems. No further troubleshooting steps are required.
in system mode
Troubleshooting is
and the board
done.
Even if the board passes all tests, it may still
Note
autoboots, or the
be bad. Selftest does not try out all functions
board has passed
in the board (for example, SCSI, or
selftests.
VMEbus tests).

VI. The board has
failed one or more
of the tests listed
above, and can not
be corrected using
the steps given.

A. There may be 1. Document the problem and return the board for
some fault in the
service.
board hardware or 2. Phone 1-800-222-5640.
the on-board
debugging and
diagnostic
firmware.

YOU ARE FINISHED (DONE) WITH THIS TROUBLESHOOTING PROCEDURE.

F-4

Computer Group Literature Center Web Site

Index

Symbols
+12 Vdc power 1-15, 2-21

Numerics
172Bug 4-1
console port 4-9
debugger command set 4-22
debugger package 3-1
description 3-1
disk I/O support 3-16
disk/tape controller data D-1
implementation of 3-3
installation 3-4
network controller data E-1
port 0 or 00 4-9
port numbers 4-9
prompt 3-8
stack 3-15
starting address 3-15
vector table and workspace 4-13
172Bug
(see
debug
monitor
and
MVME172BUG) 2-2
27C040 PROM 3-3
28F008SA Flash 3-3
5-1/4 DS/DD 96 TPI floppy drive D-2
53C710 (SCSI controller) 1-27
82596CA (see Ethernet and LAN) 1-26,
1-27, 3-21

A
ABORT switch 1-15, 1-33, 3-13
adapter board (see P2 adapter board) 1-1
address 4-3

as a parameter 4-5
DRAM 2-20
Flash/PROM 3-15
formats 4-5
arbitration priority 1-30
arguments 4-3
arithmetic operators 4-3
ASCII string 4-3
assembler/disassembler 4-10
assertion 1-13
autoboot 3-9
autojumpering 2-18

B
backplane connectors P1 and P2 2-19
backplane jumpers 2-18
Backus-Naur 4-3
base address of IndustryPacks A-16
base and top addresses 4-7
base identifier 4-4
Battery Backed Up RAM (BBRAM) and
Clock A-3
battery backup function 1-18
battery backup select jumpers 2-10
battery care 1-19
battery-backed-up RAM (BBRAM) and
clock 1-22
baud rates 1-23, 3-7
BG (bus grant) 2-18
BH (Bootstrap and Halt) 3-17
binary number 1-12
block diagram, MVME172 1-14
block size, logical 3-16

IN-1

Index

blocks versus sectors 3-16
BO (Bootstrap Operating System) 3-17
board connectors 1-32
Board Information Block (BIB) A-1
Board Mode, 172Bug 3-5
board-level hardware features 1-1
BOOTP protocol module 3-22
Bootstrap and Halt (BH) 3-17
Bootstrap Operating System (BO) 3-17
Bootstrap Protocol (BOOTP) 3-22
break function 3-13
BREAK key 3-13
burst transfers 1-16
bus grant (BG) 2-18
byte 1-13

I
N
D
E
X

C programming language 3-3
cabling 2-19
cache 1-16
calling system utilities from user programs
4-11
checksum data A-3
CISC Embedded Controller(s) D-1
Clear To Send (CTS) 3-7
Clock 2-9
clock chip 1-22
clock select header (J16) 2-9
clock select header for serial port 2 (J17) 2-9
clock speed, MPU 3-14
CLUN (controller LUN) D-1, E-1
CNFG command A-1
command identifier 4-3
command line 4-1
configuration
controllers/devices 3-20
hardware 3-4
Configure (CNFG) and Environment (ENV)
commands A-1
configuring
base address of IndustryPacks A-16
BIB (Board Information Block) A-1

IN-2

debug parameters A-3
IndustryPacks A-16
VMEbus interface A-10
connector P2 4-9
connectors 1-2, 1-32, 2-16
console port 4-9
console terminal F-1
control bit 1-13
controller LUN (CLUN) D-1
controller modules D-1
cooling requirements 1-10
count 4-3
creating a new vector table 4-16
creating a program with the assembler/disassembler 4-10
CTS (Clear To Send) 3-7

D
data bus structure 1-16
data circuit-terminating equipment (DCE)
1-23, B-2
data terminal equipment (DTE) 1-23, B-1
date and time, setting 3-8
DCE (data circuit-terminating equipment)
1-23
debug
monitor
(see
172Bug
and
MVME172Bug) 2-2
debug port 4-9
debugger
address parameter formats 4-5
commands 4-22
description 3-2
general information 3-1
prompt 4-1
decimal number 1-12
decoder, GCSR 1-38
default 172Bug controller and device parameters 3-20
default baud rate (see baud rates) 3-7
device LUN (DLUN) D-2, E-1
device probe function 3-17
diagnostics 3-2, 3-26

Computer Group Literature Center Web Site

direct access devices D-2, D-4
direct memory access (DMA) 1-26
directories, switching 3-26
disk I/O
commands, 172Bug 3-17
error codes 3-20
support, 172Bug 3-16
via 172Bug commands 3-17
via 172Bug system calls 3-18
disk/tape controller
data D-1
modules supported D-1
DLUN (device LUN) D-2, E-1
DMA (direct memory access) 1-26
double precision real 4-20
double-button reset 3-11, A-3
download 4-10
downloading an S-record object file 4-10
DRAM
base address 2-20
mezzanines 3-15
options 1-17
performance 1-30
DTE (data terminal equipment) 1-23

E
EIA-232-D
connection diagrams 2-30
connections B-1
interconnections B-1, B-2
port(s) 3-7, 4-9
ports 4-13
SIMM part numbers 2-6
EIA-485/EIA-422
connection diagrams 2-34
connections B-8
interconnections B-8
interface characteristics B-10
signals 1-26, B-9
EIA-530 1-26
connection diagrams 2-28
connections B-5

http://www.mcg.mot.com/literature

interconnections B-5
interface characteristics B-7
signals B-5
EIA-530/V.36 SIMM part numbers 2-6
elevated temperature operation 1-10
entering and debugging programs 4-10
entering debugger command lines 4-1
ENV command A-3
parameters A-4
setting up IPs A-16
Environment (ENV) and Configure (CNFG)
commands A-1
environment commands 3-5
environment, operating 1-10
EPROM 1-21
and Flash 1-21
Size Select Header (J23) 2-12
size select header (J23) 2-12
EPROM/Flash cycle times 1-31
error codes, 172Bug 3-20, 3-23
error codes, disk I/O 3-20
ESDI Winchester hard drive D-3
Ethernet
controllers E-1
interface 1-27
packets 3-21
station address 1-27
transceiver interface 1-27
Ethernet (see 82596CA and LAN) 1-27, E-1
examples
displaying board information block A-1
exception vectors used by 172Bug 4-14
exponent field 4-19
expression 4-3
expression as a parameter 4-3
extended addressing 2-19

F
facilities 3-26
factory debugger environment F-1
FAIL LED 1-15
false 1-13

IN-3

I
N
D
E
X

Index

FCC compliance 1-12
features 1-7
firmware overview 3-1
Flash 3-3
memory 1-21
initializing 3-8

programming 3-24
flexible diskettes D-2
floating point unit (FPU) 4-18, 4-21
instructions 4-18
support 4-18
floppy diskettes D-4
floppy drive D-2, D-3
flow control F-1
FPU (floating point unit) 4-18, 4-21
front panel switches and indicators 1-15
functional description 1-15
fuse (F2) 2-21

G
GCSR (Global Control and Status Registers)
2-20, 3-25
board control register 1-39
general control register A-17
general information, debugger 3-1
general purpose readable jumpers header
(J28) 2-12
global bus timeout 2-20
Global Control and Status Registers (GCSR)
2-20, 3-25
grounding
proper B-11

I
N
D
E
X

handshaking 3-7
hard disk drive D-3
hardware
functions 4-13
interrupts 1-29
preparation 2-2
headers, setting 2-3, 3-4
hexadecimal character 1-12

IN-4

host port 4-9
host system 4-10

I
I/O
commands

IOC (I/O Control) 3-18
IOI (Input/Output Inquiry)
3-17

IOP (Physical I/O to Disk)
3-18

IOT (I/O Teach) 3-18
interfaces 1-23
maps 1-33
IACK (interrupt acknowledge) 2-18
IndustryPack (IP)
base address A-16
configuration
general control registers A-17
interrupt control registers A-17
memory size A-17
configuring A-16
interconnections C-1
interfaces 1-26
modules, installation 2-16
installation 3-4
172Bug 3-4
IP modules 2-16
MVME172 2-17
SIMMs 2-8
transition modules 2-17
installation and startup 3-4
Intel 82596 LAN Coprocessor Ethernet Driver 3-21
interconnections
IndustryPack C-1
serial B-1, B-5, B-8
interface characteristics
EIA-232-D B-4
Internet Protocol (IP) 3-21

Computer Group Literature Center Web Site

interrupt acknowledge (IACK) 2-18
interrupt control registers A-17
Interrupt Stack Pointer (ISP) 3-15
interrupts, programmable 1-29
introduction 1-1, 2-1
IOT command parameters D-5
IP (IndustryPack)
bus clock header (J14) 2-14
bus strobe select header (J19) 2-15, 3-6
installation on the MVME172 2-16
reset signal 1-27
strobe signal C-3
IP2 chip 1-26
IP32 CSR bit 2-14
ISP (Interrupt Stack Pointer) 3-15

J
J1 jumper 2-3
J12 jumpers 3-6
J14 jumper 2-14
J14 jumpers 3-6
J15 connector 2-5
J16 jumpers 2-9, 3-6
J17 jumpers 2-9, 3-6
J18 connector 1-32
J19 jumper 2-15, 3-6
J22 jumpers 2-10, 3-15
J23 jumper 2-12
J25 connector 1-32
J28 jumpers 1-21, 2-12
J6 connector 1-33
jumpers
setting 2-3, 3-4
user-definable 2-12

L
LAN
DMA transfers 1-31
FIFO buffer 1-31
LAN (see 82596CA and Ethernet) 1-26, 1-27
LAN LED 1-15
layout, MVME172 2-4

http://www.mcg.mot.com/literature

LEDs 1-15, 1-33
local
bus I/O devices memory map 1-36
Local Area Network (LAN) 1-26
local bus 1-16
arbiter 1-30
arbitration priority 1-30
memory map 1-33
timeout 1-29
local bus/VMEbus interface 1-22
local I/O devices memory map 1-35
local reset operation (LRST) 1-39
local resources 1-28
local-bus-to-DRAM cycle times 1-30
location monitors 2-20
logical unit number (LUN) (see CLUN or
DLUN)
longword 1-13
LUN (logical unit number) (see CLUN or
DLUN)

M
mantissa field 4-19
manual terminology 1-12
map decoder, GCSR 1-38
MC2 chip 1-19
LCSR 2-12
MC68060 TRAP instructions 4-11
MC68xx060 Cache 1-16
memory base addresses 1-30
memory maps 1-33
local bus 1-33
local I/O devices 1-35
VMEbus 1-38
VMEbus short I/O 1-38
memory options 1-17
memory requirements, 172Bug 3-15
memory size A-17
metasymbols 4-3
modem 1-24
MPAR (Multiprocessor Address Register)
3-24

IN-5

I
N
D
E
X

Index

I
N
D
E
X

MPCR (Multiprocessor Control Register)
3-23
MPU clock speed calculation 3-14
multi-MPU programming considerations
1-39
multiple MVME172s, installation 2-20
Multiprocessor Address Register (MPAR)
3-24
Multiprocessor Control Register (MPCR)
3-23
multiprocessor support 3-23
MVME172
as Ethernet controller E-1
board-level hardware features 1-1
MVME172 module installation 2-17
MVME172 specifications 1-9
MVME172 switches, headers, connectors,
fuses, and LEDs 2-4
MVME172BUG 3-1
MVME172Bug 1-17, 1-21
MVME172BUG debugging package (see
172Bug and debug monitor) 2-2
MVME320 disk/tape controllers D-2
MVME323 disk/tape controller D-3
MVME327A D-3
MVME328 disk/tape controller D-4
MVME350 controller D-4
MVME374 Ethernet controller E-1
MVME376 Ethernet controller E-1
MVME712-12 1-1
MVME712-13 1-1
MVME712A 1-1
MVME712AM 1-1
MVME712B 1-1
MVME712M 1-1
installation 2-17
MVME712x 1-1
MVME712x serial ports 1-25

N
negation 1-13
network

IN-6

boot control module 3-22
controller data E-1
controller modules E-1
I/O error codes 3-23
I/O support 3-21
Network Auto Boot 3-10
no display F-1
Non-Volatile RAM (NVRAM) A-3
normal address range 1-34
no-VMEbus interface option 1-17, 1-21, 2-5,
2-13, 3-8
numeric value 4-4
NVRAM (Non-Volatile RAM) A-3

O
object code 4-10
offset registers 4-7
operating environment 4-12
operational parameters A-3
option field 4-3
overview 1-1

P
P1 connector 1-32, 2-19
P2 adapter board (see adapter board) 1-1
P2 connector 1-1, 1-32, 2-19, 4-9
panel, front 1-15
parameters (see default 172Bug controller
and device parameters) 3-20
part numbers, SIMM 2-6
parts location diagram 2-4
port 1 or 01 4-9
port number(s) 4-3, 4-9
port numbers 4-9
ports for debugging 4-9
power-up 3-24
preserving the debugger operating environment 4-12
program execution 3-23, 3-25
programmable tick timers 1-28
programming considerations, multi-MPU
1-39

Computer Group Literature Center Web Site

PROM (see 27C040 PROM) 3-3
prompt, debugger 3-8
proper grounding B-11
pseudo-registers 4-7
publications
Non-Motorola 1-4

Q
QIC-02 streaming tape drive D-4

R
range 4-3
RARP/ARP protocol 3-22
readable jumpers 2-12
reading a program from disk 4-11
receivers
EIA-232-D B-4
EIA-485 B-11
EIA-530 B-8
related documentation 1-3
relative address+offset 4-7
remote status and control connector (J6) 1-33
RESET switch 1-33, 1-39, 3-12
resetting the system 1-39, 3-11, A-3
resources, local 1-28
restarting the system 3-11
Reverse Address Resolution Protocol
(RARP) 3-22
RF emissions 1-12
RFI (radio frequency interference) 2-17
ROMboot 3-10
RUN LED 1-15

S
SCC (Serial Communications Controller)
(see Z85230) 1-23, 3-7
scientific notation 4-21
SCON LED 1-15
SCSI
Common Command Set (CCS) D-2
controller (53C710) 1-27
FIFO buffer 1-31

http://www.mcg.mot.com/literature

interface 1-28
LED 1-15
termination 1-28
terminator power 2-21
transfers 1-31
SCSI Common Command Set (CCS) D-4
SD (switch directories) command 3-26
sector size 3-16
self-test routines 3-24
sequential access devices D-2, D-4
Serial Communications Controller (SCC)
(see Z85230) 1-23, 3-7
serial communications interface 1-23
serial interconnections B-1
Serial Interface Module (SIMM)
installation 2-8
part numbers 2-6
removal 2-6
selection 2-5
serial interface module (SIMM)
model numbers 1-24
serial interface parameters B-4
serial interface signals B-1
serial interfaces and transition boards 1-26
serial port 2 4-9
Serial Port 2, MVME712x 1-24
Serial Port 4, MVME712x 1-25
serial port B EIA-485/EIA-422 interconnect
signals B-9
serial port B EIA-530 interconnect signals
B-5
serial port interface 1-23
serial ports B-1
Set Environment to Bug/Operating System
(ENV) command A-3
short I/O space 1-38, 3-26
sign field 4-19
signals 1-26
SIMMs 1-26, 2-5
installation 2-8
single precision real 4-19
slave address decoders A-10

IN-7

I
N
D
E
X

Index

I
N
D
E
X

snooping 1-16
software initialization 1-39
software-programmable hardware interrupts
1-29
source line 4-10
special considerations for elevated temperature operation 1-10
specifications, board 1-9
SRAM (static RAM) 1-18
battery backup source select header
(J22) 2-10
options 1-18
S-record format 4-10
stack 3-15
startup, 172Bug 3-4
STAT (status) LED 1-15
static RAM (SRAM) 1-18
static variable space 3-15
status bit 1-13
streaming tape drive (see QIC-2 streaming
tape drive) D-4
string literal 4-4
strobe signal C-3
structure, data bus 1-16
switches and indicators 1-15
switching 3-26
switching directories (SD command) 3-26
synchronous/asynchronous protocols 1-23
syntactic variables 4-3
SYSFAIL* signal 3-14
system
calls, TRAP #15 3-19
considerations 2-19
console 3-7
controller function 3-5
reset (SRST) 1-39
system console F-1
System Fail (SYSFAIL*) signal 3-10
System Mode, 172Bug 3-5

terminal input/output control 3-16, 4-1
termination, SCSI 1-28
TFTP protocol 3-22
tick timers 1-28
time-of-day clock 1-22
timeout
function 1-29
global bus timeout 2-20
local bus 1-29
timing performance 1-30
transfer type (TT) signals 1-34
transition boards and serial interfaces 1-26
transition module serial ports 1-24
transmitters
EIA-232-D B-4
EIA-485 B-10
EIA-530 B-7
TRAP #15 4-11
TRAP #15 system calls 3-18
Trivial File Transfer Protocol (TFTP) 3-22
troubleshooting steps F-1
true 1-13
TT (see transfer type) 1-34
TX and RX clocks 1-25

U
UDP/IP protocols 3-21
unpacking instructions 2-1
user-customized environments F-1
using the 172Bug debugger 4-1

V
vector table 4-13
VME LED 1-16
VMEbus
accesses to the local bus 1-38
interface and VMEchip2 1-22
interface, configuring A-10
memory map 1-38
short I/O memory map 1-38
specification 1-4

temperature, high 1-10

IN-8

Computer Group Literature Center Web Site

VMEbus, "no" option 1-17, 1-21, 2-5, 2-13,
3-8
VMEbus/local bus interface 1-22
VMEchip2 1-22
GCSR (Global Control and Status Registers) 2-20, 3-25

W
watchdog timer 1-28
Winchester hard drive D-2, D-3
word 1-13

X
XON/XOFF 3-7

Z
Z85230 Serial Communications Controller
(SCC) 1-23, 3-7

I
N
D
E
X

http://www.mcg.mot.com/literature

IN-9

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.6
Linearized                      : No
XMP Toolkit                     : Adobe XMP Core 4.2.1-c041 52.342996, 2008/05/07-21:37:19
Create Date                     : 1999:03:11 15:03:33Z
Creator Tool                    : FrameMaker+SGML 5.5.3L15a
Modify Date                     : 2016:05:26 15:21:48-07:00
Metadata Date                   : 2016:05:26 15:21:48-07:00
Producer                        : Acrobat Distiller 3.01 for Windows
Format                          : application/pdf
Title                           : Untitled Document
Document ID                     : uuid:3dc25e22-905d-5246-80c8-11fe188b3a59
Instance ID                     : uuid:9a09b180-fc01-da44-925c-5fa1ca4df36a
Page Layout                     : SinglePage
Page Mode                       : UseOutlines
Page Count                      : 191
Creator                         : FrameMaker+SGML 5.5.3L15a

EXIF Metadata provided by EXIF.tools

VME172FXA

VME172FXA VME172FXA

Navigation menu

Versions of this User Manual:

Views

Navigation