U Spec_3_Floppy_Disc_Operating_System_Jun75 Spec 3 Floppy Disc Operating System Jun75

User Manual: uSpec_3_Floppy_Disc_Operating_System_Jun75

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JUNE
1975
NA110NAL
J.lSPEC
3
FLOPPY DISC
OPERATING
SYSTEM
(and
CRT
Interface)
FEATURES
CONVEN!ENT MASS STORAGE -
each
diskette
stores
nearly
158k
16-bit
words
of
data
(more
than
% mile
of
paper
tape).
• SPE
ED
-
data
transfer
rate
is
250k
bits
per
second.
• POWER -full
complement
of
system
software
is
instantly
available via
the
Disc
Operating
System
(DOS).
• SIMPLICITY -
operator
chores
are
reduced
to
the
minimum
through
the
powerful
DOS
command
repertoire.
•
LOW
COST -DOS effectively
expands
system
memory
and
you
get
about
252k
bits
per
dollar.
• CUTS DEVELOPMENT TIME -DOS does
the
clerical
work,
1000
times faster
than
a
programmer
can.
• CUTS PROGRAMMING COSTS -fewer
operator
errors
and
faster
access
to
programming aids mean
lower programming costs.
©
1975
National
Semiconductor
Corp.
INTRODUCTION
The
Floppy
Disc Operating
System,
an
option
for
the
I MP-16P
Development
System,
provides a
new
level
of
power
and
speed
to
the
microprocessor
system
engineer
while greatly simplifying his
operator-oriented
tasks.
The
convenient
mass storage capability
of
the
floppy
disc allows
the
elimination
of
unwieldy paper tape, cards,
and
other
source media.
The
Disc Operating
System
(DOS)
software
adds
throughput,
capabilities,
and
flexibility previously unavailable
with
microprocessor
systems.
A
CRT
Interface
is
provided
with
DOS
and
allows
the
user
to
connect
a variety
of
terminals
to
the
I MP-16P
Development
System
to
maximize
the
speed
of
operator
communications.
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SYSTEM DESCRIPTION
The
Floppy
Disc Operating
System
consists
of
the
following items.
• Dual
Floppy
Disc Drives
to
provide
more
than
5
million
bits
of
easily accessible
data
storage.
• Interface Card, which
mounts
in
the
IMP·16P
card
cage
'and
provides
the
firmware
to
control
the
disc
drives
and
the
transfer
and
formatting
of
data
exchanged
between
the
microprocessor
and
discs.
• DOS
software,
which includes
the
following:
• Assembler (Relocating)
• Linking
Loader
• DEBUG
program
Editor
• Full
complement
of
utility
and
diagnostic pro-
grams.
CRT
INTERFACE
The
CRT Interface firmware
is
contained
in
two
ROMs
on
the
Interface
PC
card. This firmware allows a
CRT
terminal
to
be
connected
to
the
IMP-16P
and
provides
data
transmission rates
of
300
or
1200
baud.
The
baud
rate
is
selectable
from
the
control
panel
of
the
I MP-16P
Development
System.
Interconnection
is
via a
standard
E lA-type cable
and
allows
attachment
of
a
broad
range
of
widely available terminals. Implementa-
tion
of
this
CRT
interface, when
coupled
with
the
p~wer
of
DOS, provides
the
user with an
extremely
fast
and
flexible
tool,
thus
freeing him
to
concentrate
on
program
development
and
problem
solving.
DOS
CAPABI LI TI
ES
An
operating
system
relieves
the
user
of
tedious,
non-
productive
tasks. It provides simple, easy·to-use com-
mands
to
initiate
and
control
such
operations
as
loading
and
executing
programs, transferring
control
and
information
between
programs,
and
similar tasks.
The
Floppy
Disc
Operating
System
provides all
these
capabilities
and
also
expands
the
power
of
the
user's
system
by effectively
extending
system
memory,
Pro-
grams
stored
on
disc can be quickly loaded
into
memory
and
executed
under
control
of
DOS. Access
to
and
storage
of
programs
and
data
is
fast
and
simple.
The
Floppy
Disc Operating
System
allows
the
user
to
write
and
edit
source
programs
at
the
system
keyboard,
then
to
store
them
directly
on
floppy
disc using
the
Source
Editor.
The
stored
source
program
may
then
be
assembled instantly,
under
DOS
control,
by
issuing a
single
command.
Assembled (object) programs may be
stored
on
disc in binary
form
via
the
DOS Linking
Loader,
then
loaded
into
the
processor using
the
Disc
Bootstrap
routine.
The
DEBUG program can be used
quickly
and
easily
to
debug
the
user's program.
The
entire
program
development
and
checkout
process
can be accomplished
without
ever using
paper
tape
or
cards,
and
without
loading
source
programs more
than
once.
The
software
modules available
under
the
control
of
DOS, provide easy-to-use,
conversational·mode
in-
structions
and
commands
to
further
simplify program
development.
Error
checking
and
recovery procedures
are also included in
the
DOS
software
modules
to
enhance
design
and
checkout
of
microprocessor pro-
grams.
DISC OPERATING SYSTEM SOFTWARE MODULES
Included
with
DOS are all
the
supporting
software
modules required
to
allow
the
user
to
take
full advantage
of
the
Dual
Floppy
Disc
Operating
System.
The
software
described
below
can be
considered
as
part
of
the
system
and
is
all
contained
on
a single
diskette.
• IMPASM -an
Bk,
Resident Assembler
that
accepts
free
format
source
statements
and
produces
relocat-
able load modules
for
storage
on
disc
or
paper
tape.
•
EDIT16
- a
Source
Editor
program
that
enables
editing
of
previously
prepared
source programs
and
generation
of
new
text.
• DSCLDR - a Linking Loader
that
loads
and
relocates
load modules, resolves
external
linkages,
and
writes
memory
images
to
the
disc in a
format
suitable
for
bootstrapping
into
memory
for
execution.
• DEBUG - a supervisory
program
that
allows
the
user
to
checkout
his programs
from
the
terminal keyboard.
DEBUG allows
the
user
to
start,
stop
or
change a
program
and
to
examine
the
contents
of
memory,
registers
and
the
stack.
• A full
complement
of
utilities, diagnostics
and
PROM
Development
software
is
also included
with
DOS.
DOS COMMAND REPERTOI RE
The value
of
an operating system
depends
upon
the
range
and
simplicity
of
its
command
repertoire. A
powerful
set
of
commands
is
provided by
the
Floppy
Disc Operating
System
in
the
form
of
simple, easy-to-
remember
mnemonics. These
commands,
listed below,
provide
operator
control
of
DOS. Additionally, each
software module (Assembler, Editor, and others) has a
set
of
commands
associated with its particular functions.
Assembler
Commands
DI
Disc Input, causes a
source
file
to
be read
from
disc
into
memory.
DT
Disc
Temporary,
allows
temporary
storage on
disc
of
source programs read
from
cards
or
paper
tape.
The
source
can
then
be edited
without
the
need
to
re-read cards
or
paper tape.
DO
Disc Object, allows
the
user
to
store
object
modules
on
disc instead
of
paper tape.
DE
Disc Editor, transfers
control
to
the
source
Editor program.
DL
Disc Loader, transfers
control
to
the
Disc
Loader program.
Editor
Commands
AS
Transfers
controi
to
the
Assembier.
DC
Disc Copy, allows a range
of
sectors
to
be
copied
from
one
portion
of
disc
to
another
or
from
one
diskette
to
another.
DE
Disc Edit mode, allows
the
user
to
edit
large
source files within a small
edit
buffer in
memory
by editing only a
portion
of
a file
at
a
time. The remainder
of
the
file resides on disc
and
all
the
housework
of
maintaining exactly
where
the
user
is
working
in
his program
is
handled by
the
Editor.
DI
Disc Input, allows
the
user
to
read a designated
number
of
text
lines
or
sectors from
the
disc
into
the
edit
buffer.
DO
Disc
Output,
allows
the
user
to
move a desig-
nated
number
of
text
lines
or
sectors from
the
edit
buffer
to
the
disc.
ED
End Disc Edit,
terminates
the
disc
edit
mode
and performs
all
required clean-up procedures.
AD
Abort
Disc Edit, terminates
the
disc
edit
mode
immediately
without
performing housecleaning.
Disc Loader
Commands
MP
Main Program Load, causes a
set
of
relocatable
load modules
to
be linked
into
a main program
and
written
to
a designated area
of
disc.
RLM
Relocatable Load Module identifier, causes an
LM
to
be read
into
memory
from a designated
area
of
disc or
from
paper tape.
XEC Execute, causes a main program
to
be read
into
memory
from disc and
executed.
GO Causes
the
last program (group
of
LMs)
loaded
into
memory
to
be
written
to
the
disc
at
the
correct
sectors
and
assigns an
entry
point
address.
SPECIFICATIONS FOR DUAL FLOPPY DISC DRIVES
Dual Floppy Disc Drives
• Dimensions:
17
inches high, 21'h inches wide, 22'h
inches
deep
• Weight:
50
pounds
•
Input
Power:
110
± 10% VAC @
1.5
A (DC power
supplies internal
to
drives) (220 V AC,
50
Hz
option
available)
• Performance Characteristics:
•
256
16-bit
words per sector
• 8 sectors per
track
• 77
tracks
per
diskette
• 157.
7k
words
per
diskette (2.52 Mbits)
•
135.4
msec. average latency
to
obtain
256
words
•
0.250k
bits per
second
transfer rate
•
30.2k
bits per second effective
data
transfer rate
with latency
I
nterface PC Card
• Dimensions: B'h inches high,
11
inches long
•
Input
Connector:
144
pins on 0.125-inch spacing
•
OutPUt
Connectors: Disc -
30
pins
CRT Interface - 6 pins
•
Input
Power:
+5
V @ 1.2
A,
-12
V @
0.2
A
• Card Cage Slot: A2-J4
CR T Interface
•
Standard
TTY-type firmware
subroutines
for
data
send/receive
• Asynchronous
data
transmission
at
300
baud (30
characters per second) or
1200
baud
(120
characters
per
second)
• Baud rate selectable
from
I MP-16P
control
panel
•
Standard
EIA interface cable and
connector
-
Q)
(J
co
t:
Q)
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t:
....
a:
o
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t:
co
-
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Q)
...,
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Q)
c.
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:i.
ORDERING
INFORMATION
The
I MP-16P/840
Floppy
Disc
Operating
System
can be
used
with
any
IMP-16P
Development
System
that
has
8k
or
more words
of
memory.
Although
DOS requires
only
a
floppy
disc
and
a
TTY
for
operation,
it
can
support
a variety
of
peripheral devices, including high-
speed
paper
tape
reader,
card
reader,
CRT
terminal,
and
line
printer.
Since
the
addition
of
the
Floppy
DOS
to
existing I MP-16P
Prototyping
Systems
requires
some
minor
modifications
to
the
hardware,
separate
order
numbers
are assigned
to
options
that
are
to
be installed
as field retrofits.
For
additional
information
on
this
product,
contact
the
nearest National
Semiconductor
Sales/Service Represent-
ative
or
communicate
directly with
our
World Head-
quarters:
Order
Number:
IMP-16P/840A(E)
Descripti
on:
National
Semiconductor
Corporation
2900
Semiconductor
Drive
Santa Clara,
California
95051
(408)
732-5000
I
TWX
(910)
339-9240
Order
Number:
I MP-16P
/840C(
E)
Description:
CRT/Dual
Disc Field
Retrofit
Package Includes:
CRT/Dual Disc
Package Includes:
Interface PC Card
Dual Disc Firmware Interface
PC
Card
Dual Disc Firmware
CRT
Firmware
Dual
Floppy
Disc Drives
DOS
Software
(on
diskette)
CRT
Interface Cable
CRT
Interface Firmware
Dual
Floppy
Disc Drives
DOS
Software
(on
diskette)
CRT
Interface Cable
Retrofit
Kit
Documentation
(Hardware &
Software)
Documentation
(Hardware & Software)
NOTE:
All
units
are available in
110
V
AC,
60
Hz
or
220
VAC,
50
Hz
"E"
versions.
To
order
the
220
V 150 Hz version, append
"E"
to
the
Order
Number
(for
example,
IMP-16P/840AEI.
rMnuI'ecUed
inter
one
or
more
of
the
~g
u.s.
patents: 3083262, 3189758, 3231797, 3303356, 3317671, 3323071. 3381071, 3408542, 3421025, 3426423, 3440496, 3518750, 3519897, 3557431,358)765,3566218,3571630,3575609.3579059,
J593069,3597640.3607469,3617859,3631312,3633052,3638131,3648071,3651565,3693248
=O~~i~:~~;,t.°Ja~~:.t~a~fornia
95051.
(408)
732-5000/TWX (910) 339-9240
National Semiconductor GmbH
808 Fuerstenfeldbruck. Industriestrasse
10.
West
Germany.
Tele.
(08141) 1371ITelex 27649
National Semiconductor
(UK)
Ltd
Larkfield Industrial Estate. Greenock. Scotland. Tele.
(0475)
33251ITelex 778-632
~
NATIONAL
Natoonal
does
nOl
assume any responslbihty for use of any
CirCUItry
deSCllbed;
no
CirCUIt
patent licenses are unpiled; and NatIonal reserves the light,
at
any tIme
WIthout
notIce, to change said
CIrcUItry

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