HP 82713A User manual

HEWLEIT-PACKARD
HP82713A
Plug-In Module Simulator
OWNER'S MANUAL
For Use With the HP-75

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• Printed in U.S.A.
Fli;;' HEWLETT
~I:.. PACKARD
HP82713A
Plug-In Module Simulator
Owner's Manual
For Use With the HP-75
September 1982
82713-90001
© Hewlett-Packard Company 1982

Autostart Card
Instructions
A magnetic card labeled AUTOSTART, which contains a
included in the software accompanying your HP
Simulator.
AUTOSTART gives you the capability of including in
program that your HP-75 will execute as soon as it
be particularly useful to you if your plug-in module
dedicated system.
special
82713A
LEX file, is
Plug-In Module
your
plug-in module a
is turned on. This will
will be used for a
Just follow these three simple steps in order to make use of the AUTOSTART
capability in a plug-in module you are developing:
1. Read the LEX file from the AUTOSTART card into your HP-75 (COPY CARD TO
'AUTOSTRT').
2. Specify AUTOSTRT as the lexname in the BUILD operation of your PMS.
3. Write the BASIC program you wish to be executed automatically at turn-on,
and copy it into your PMS under the name of AUTOST (not AUTOSTRT).
And that's all
HP-75. With
the HP-75 on
automatically.
there
the
by
is to it. You may now purge one or both files from your
autostart plug-in module files present, any time you turn
pressing [ATTN] it will execute the AUTOST program
You should be aware of the following limitations on your use of AUTOSTART:
o You will not be able to use another LEX file in the same bank of your
plug-in module.
o
AUTOSTRT executes a DEF KEY for character 159 and uses it to run the
AUTOST program when the HP-75 is turned on. If you subsequently redefine
character 159 to some other operation, that operation will be executed
instead of your AUTOST program. For example, DEF KEY CHR$(159),'HELLO';
will cause HELLO to be displayed in your HP-75 at turn-on, and your AUTOST
program will not run.
82713-90007
rliPfJ HEWLETT
':1::.. PACKARD
1000 N.E. Circle Blvd., Corvallis, OR 97330
c
Hewlett-Packard Company 1982
Printed in U.S.A. 10/82

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Introduction
Your HP 82713A Plug-In Module
to help you prepare your
plug-in modules in support of
Simulator (PMS) was designed by Hewlett-Packard
program materials for incorporation into custom
your HP-75 portable computer.
The ROM (read-only memory) of a plug-in module is simulated by
bytes of RAM (random-access memory). Data can easily be written
from the RAM, just as it is in the HP-75 itself. Circuitry is
retains the memory after power has been removed from the unit.
8K or 16K
into or read
used which
The
PMS incorporates the flexibility of RAM and the memory characteristics of
ROM in a single, easy-to-use package.
With the simulator you can accomplish the following:
o Since computer memory is not required, you can conduct realistic
performance tests of your programs.
o You can field test your programs.
o You can verify absolutely the function and fit of your software within
the plug-in module.
o You can compare the performance of a program in the plug-in module to
the performance of the same program in the computer.
o You can temporarily store files and programs.
If you are concerned
updating, the PMS will
you are an accountant;
software. Just read
plug-in module. Doing
permanent module.
with "semifixed" programs that require periodic
be particularly useful to you. Suppose, for example,
each year you need to use the latest tax table in your
the current data into your simulator, and use it as a
this saves you the cost and time required to obtain a
You need to have an HP-75 portable computer and to understand the HP-75
keyboard and programming techniques in order to operate the PMS.
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Only two pieces of equipment and the associated software are needed to
operate your PMSj the simulator itself (which includes a built-in cable and
connector), an HP-75 portable computer, and the system commands recorded on
magnetic cards.
After you have studied
your HP-75 computer
specific commands that
will understand how
maintain it. And you
cover the PMS and how
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this manual you will know how to connect the PMS to
and how to turn it on and off. You will know the
enable you to write programs into the simulator. You
the continuous memory works and what you must do to
will know the warranty and repair prov~s~ons which
to make use of them should the need arise.

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GETTING STARTED
Operation
CAUTION
Be sure to turn the HP-75 off before
plugging anything into an external port.
Failure to do so may damage the computer
or the plug-in unit.
To assemble a simulator system,
end of the cable into any
edge
of your HP-75.
you need only to plug the connector on the
one of the three external ports on the front
The HP 82713A Plug-In Module Simulator System
Up to three simulators may be plugged into the external ports at the same
time. If only one or two simulators are used, they may be plugged into any
of the ports in any order.
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PMS ADDRESSES
A PMS consists of two banks of RAM, each of which contains 8K bytes of
memory. Each bank can be accessed independently. A permanent plug-in module
can
contain up to two full PMS banks. The address of a particular PMS bank
depends upon the port into which the PMS is plugged. The ports are searched
in sequence from left to right. The two banks of the first PMS found will be
designated as ROMA and ROMB.
--
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ROMA ROMC ROME
ROMB ROMD ROMF
)) ))
))
PORT 1 PORT 2
PORT 3
Addresses Using Three PMS's
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ROMA
ROMB
))
PORT 3
Addresses Using One PMS
HOW TO TURN THE PMS ON AND OFF
Operating power for the PMS is obtained from the HP-75. Therefore, to
the simulator on and off you need only to turn the HP-75 on and off.
to removing the PMS (or a permanent plug-in module), execute the CLEAR
command to insure that the HP-75 will not expect the plug-in unit
present when it is turned on again.
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turn
Prior
VARS
to be
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CONTINUOUS MEMORY
Programs that you write and record in the PMS remain there until you purpose-
ly remove them. The continuous memory of the PMS saves the programs, even
after operating power is removed. The battery, which provides the continuous
memory, is wired into the PMS. Although it is not rechargeable, it should
give you several years of carefree use.
Note: The PMS simulates a ROM and will
retain its memory for long periods of
time. It should be remembered, however,
that the contents of the PMS will be lost
before you receive the first warning that
the battery is no longer maintaining the
memory. It is advisable to back up your
programs frequently on a secondary
storage medium, such as a mag card, or in
the HP-75 itself •
If you turn on the PMS and an error 232--INVALID
ately appears in the HP-75 display, the battery is
and should be replaced. (Refer to appendix B.) All
in the PMS is lost.
CHECKSUM message immedi-
not maintaining the memory
material previously stored
PERMANENT PLUG-IN MODULES
Hewlett-Packard will convert the programs you have developed and stored in
your PMS into permanent plug-in modules, should you so desire.
A ROM ID number must be provided at initialization of a PMS bank to identify
the unit. (Refer to the BUILD command, page 12.) If you intend to have your
programs converted into permanent plug-in modules, you should first contact
Hewlett-Packard and obtain permanent ID numbers for your exclusive use.
GENERAL OPERATING PROCEDURE
The simple operating procedure for the PMS is outlined below. The commands
are described in detail later. (Throughout the rest of this manual, the word
"program" will be used in the singular. It should be understood, however,
that multiple programs may be used so long as they do not exceed available
space limitations.)
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To operate the PMS:
1. Load the PMS commands into your HP-75. Do this by reading the magnetic
cards supplied with the PMS. This needs to be done only once so long as
the HP-75 memory is maintained.
2. Turn the HP-75 off, plug the PMS into a port in the HP-75 , then turn the
HP-75 on again.
3. Execute BUILD to initialize the desired memory bank and to set the ROM
ID.
4. Write, or copy, your program into the HP-75.
* 5. Execute ROMSIZE to determine the size of the program in the HP-75 you
wish
to copy into the PMS.
* 6. Execute ROMAVAIL to determine the availability of sufficient room in the
PMS for your program.
7. Execute COpy to read your program into the PMS.
Note: It is possible to assign the same
name to your program in the PMS as that
of the same program in the HP-75. If you
do
so, and you run the program, the HP-75
will run the program in its own memory
and will ignore the program in the PMS.
8. To edit your program, read it back into the HP-75 using the COPY com-
mand,
make your changes, and return it to the PMS.
9. Repeat the above steps, as required, until you have loaded a maximum of
eight programs and files plus one LEX file into your PMS bank.
*10. Mark files PRIVATE, as desired.
At any time during the above process, your program can be tested by running
it just as you run any program in the HP-75 using a plug-in module.
After you have developed and fully tested your program in the PMS and are
satisfied with the results, you may elect to have Hewlett-Packard create your
permanent
plug-in module. You should contact Hewlett-Packard for further in-
formation on how to proceed.
Refer to appendix E for the operational limitations on the use of the PMS and
permanent
plug-in modules.
* Optional step.
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Refer to appendix A for a detailed example of the PMS in use.
SYSTEM COMMANDS
The commands used by the PMS are summarized in the Command Index inside the
back cover. With the exception of the CAT, the two COPY, and the PURGE
commands, they are unique to the PMS.
Note: Since all of the PMS commands are
programmable, it is possible to include
them inadvertently in a PMS file.
Therefore, the PMS command file should
be purged from the HP-75 prior to final
verification of a module to ensure that
the PMS programs are not dependent upon
the commands.
COMMAND DESCRIPTIONS
The PMS commands are described below, together with examples of their use,
and lists of relevant error messages. Error messages with numbers less than
100 are identical to the HP-75 error messages. (Refer to your HP-75 owner's
manual for further information.) Error messages with numbers greater than 100
are unique to the PMS .
The error listings show the errors commonly
They
are not exhaustive; other applicable
displayed. (Refer to appendix C for details
All commands listed are programmable.
associated with the
HP-75 error messages may
of the error messages.)
Syntax Summary: (Refer to appendix D for further details.)
[ ] -- indicates use is optional.
filename - a parameter which may be any HP-75-compatible file name.
command.
also be
lexname - a
parameter which contains the name of a language extension file.
device - a parameter which may be anyone of six PMS bank addresses,
ROMA, ..• ROMF.
romid - a parameter which contains a numeric expression which identifies a
a bank
in the PMS.
All string expressions and commands may be either upper- or lowercase, and
may be delimited by single or double quotes as long as they match.
BUILD ':device', romid [,'lexname']
CAT '[filename]:device'
CHECKSUM (':device')
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