Forth for PET WAS(Re: Commodore 8032-SK)

From: Martin Hoffmann-Vetter <>
Date: Wed, 24 Apr 2013 18:51:20 +0200
Message-ID: <005701ce410b$f3074a30$>

long, long time ago ...

> The board, "UNIVERSAL DYNAMIC PET", "ASSY. NO. 8032089",
> contains the following EPROMs:

> UD12 TMS2532JL SUO 001024

The rom image is available at I've found an other image at It seems this is
the same program, but different serial numbers. You find the string "SUO" or
"CAN" at offset 1. At Offset 5 you find a two bytes word with the following
number. I think the 002311 are deleted to 065535 when it was copied. The rom
is an option rom starting from $9000.

I've looked into the rom content and found it must be the core from the
programmiung language forth. Then i found the Forth Interest Group and an
interesting document I've
compared the document with the disassembled rom and i would say 50% is

But the rom is only the forth core! Who know more about forth? Witch
distibution is it? Who have the disk to compelete und use it?

I've found an sub routine at $99B5 witch writes at $FFF0. So this forth
version can handle the 64k memory expansion for 8096 or later.


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Received on 2013-04-24 17:00:04

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