Sharp LH5801/5803 docs wanted

Eric Smith

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Apr 5, 1997, 3:00:00 AM4/5/97

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Does anyone have any documentation (data sheet, programmer's manual, etc.)
on the Sharp LH5801 or LH5803 microprocessors? They are 8-bit CMOS
microprocessors from the early 1980s.

The only info I've found on the net is that there was a cross-assembler
for it that ran on the Apple II.

Thanks!
Eric
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A.R. Duell

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Apr 6, 1997, 4:00:00 AM4/6/97

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er...@brouhaha.com (Eric Smith) writes:

>Does anyone have any documentation (data sheet, programmer's manual, etc.)
>on the Sharp LH5801 or LH5803 microprocessors? They are 8-bit CMOS
>microprocessors from the early 1980s.

I believe the LH5801 was used in the PC1500 pocket computer. There was a
Technical manual for this machine that included schematics and an
instruction set. I have no idea where you'd find one today, though.

Tandy sold a varient of the PC1500 called the PC2. I don't know if any of
the Tandy manuals included this information, though.

>Thanks!
>Eric

--
-tony
ar...@eng.cam.ac.uk
The gates in my computer are AND,OR and NOT, not Bill

Carl R. Friend

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Apr 6, 1997, 4:00:00 AM4/6/97

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A.R. Duell wrote in article Nr. <5i8m38$i...@lyra.csx.cam.ac.uk>:

>
> er...@brouhaha.com (Eric Smith) writes:
>
> >Does anyone have any documentation (data sheet, programmer's manual,
> >etc.) on the Sharp LH5801 or LH5803 microprocessors?

> I believe the LH5801 was used in the PC1500 pocket computer.

> Tandy sold a varient of the PC1500 called the PC2. I don't know if
> any of the Tandy manuals included this information, though.

Yes. Tandy made the Service Manual for the PC-2 (using an LH-5801
CPU) available, but only by special order. I have one in front of me
right now. I'd imagine they're still available. Ask for the Service
Manual for Tandy Catalogue Number: 26-3601/26-3605.

The manual included schematics and memory maps for not only the
handheld computer, but also for the optional printer/plotter and
cassette interface.

Unfortunately, as the document is designed as a hardware service
manual, there's no discussion on the instruction set of the processor.

Rick Low

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Apr 8, 1997, 3:00:00 AM4/8/97

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Eric Smith <er...@brouhaha.com> wrote in article
<qh912wk...@houhah.brouhaha.com>...

> Does anyone have any documentation (data sheet, programmer's manual,
etc.)

> on the Sharp LH5801 or LH5803 microprocessors? They are 8-bit CMOS
> microprocessors from the early 1980s.

Find yourself the following issues of "TRS-80 Microcomputer News":
- March 1983 (was it *that* long ago?)
- April 1983
- May 1983
- September 1983

They contain a multi-part article called "PC-2 Assembly Language" which
gives reasonably complete details of the LH5801 within the context of the
Radio Shack PC-2 pocket computer. Here's a list of the contents:
- PC-2 Block Diagram
- MPU Signals
- MPU Registers
- Memory Addressing
- Status Flags
- PC-2 I/O Port Chip
- PC-2 LCD Display Chip
- PC-2 Memory Map
- LH5801 Instruction Set (a reasonable "programmers reference manual"
substitute, with details on every instruction such as what it does (did?),
opcodes, bytes used, cycles, flags affected, etc. I seem to remember the
LH5801 instruction set was just close enough to the Z80's to piss me off
all the time.)
- Alphabetical Opcode List
- Numeric Opcode List
- A programming example that shows how to reverse the LCD video in a PC-2
using PEEK and POKE of machine language from BASIC.

Geez, now I'm all nostalgic. I'm gonna dust off my old PC-2 in the closet
and load up the disassembler I wrote ages ago. :-)

Good luck.
--
Rick Low
Ottawa, Canada
rl...@sympatico.ca
+1 (613) 749-6788

Brian Raiter

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Apr 9, 1997, 3:00:00 AM4/9/97

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>A.R. Duell wrote in article Nr. <5i8m38$i...@lyra.csx.cam.ac.uk>:
>>
>> er...@brouhaha.com (Eric Smith) writes:
>>

>>> Does anyone have any documentation (data sheet, programmer's manual,
>>> etc.) on the Sharp LH5801 or LH5803 microprocessors?
>

>> I believe the LH5801 was used in the PC1500 pocket computer.
>> Tandy sold a varient of the PC1500 called the PC2. I don't know if
>> any of the Tandy manuals included this information, though.
>
> Yes. Tandy made the Service Manual for the PC-2 (using an LH-5801
>CPU) available, but only by special order. I have one in front of me
>right now. I'd imagine they're still available. Ask for the Service
>Manual for Tandy Catalogue Number: 26-3601/26-3605.
>
> The manual included schematics and memory maps for not only the
>handheld computer, but also for the optional printer/plotter and
>cassette interface.
>
> Unfortunately, as the document is designed as a hardware service
>manual, there's no discussion on the instruction set of the processor.

I have some terse but good documentation on the PC-2 processor (the
LH-5801).

A tiny little magazine put out by Tandy was one of the few sources of
information on the PC-2. This magazine (I've forgotten the name -
"Tandy Computer Programming" or something equally creative) ran a
series of articles documenting the chip and the instruction set. It
was very mysterious - when the series was abruptly discontinued, the
editor replied (to various letters) that there was no other source for
this information. The magazine folded a year later.

I have, packed away somewhere, photocopies of all seven of the
articles. I would be willing to make copies of these copies and send
them out to people who might need them. Please email me if interested,
and I'll try to track down exactly where they are.

b

Carl R. Friend

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Apr 9, 1997, 3:00:00 AM4/9/97

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Brian Raiter wrote in article Nr. <5ig2i1$6...@eve.speakeasy.org>:
>
>
> I have, packed away somewhere, photocopies of all seven of the [Tandy
> PC-2] articles. I would be willing to make copies of these copies and

> send them out to people who might need them. Please email me if
> interested, and I'll try to track down exactly where they are.

Even better than photocopying the originals to snail-mail to folks
would be to (get permission) make the documents available on the WWW.
That way _everybody_ could make use of the information. I'd certainly
be interested in those data!

I suspect that you'll find (with a few exceptions) that the companies
involved are more than happy to grant permission to folks to re-publish
archival items of general interest. Sometimes, the companies themselves
have lost the originals!

Brian Raiter

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Apr 13, 1997, 3:00:00 AM4/13/97

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Carl R. Friend <carl....@swec.com>:

>> I have, packed away somewhere, photocopies of all seven of the [Tandy
>> PC-2] articles. I would be willing to make copies of these copies and
>> send them out to people who might need them. Please email me if
>> interested, and I'll try to track down exactly where they are.
>
> Even better than photocopying the originals to snail-mail to folks
>would be to (get permission) make the documents available on the WWW.
>That way _everybody_ could make use of the information. I'd certainly
>be interested in those data!

I certainly agree. If you can find someone who is willing to type all
this stuff into a file, send me their address. I'm afraid I don't have
that kind of free time myself.

b

Kenneth Jamer

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Apr 13, 1997, 3:00:00 AM4/13/97

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Brian Raiter (bri...@speakeasy.org) wrote:
: Carl R. Friend <carl....@swec.com>:

I don't have time at present, but as a suggestion, is the material
scannable, might save some time and effort for someone...

--
The mind is not a vessel to be filled but a fire to be kindled.- Plutarch -
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http://dragon.acadiau.ca/~016958j/