Re: P500 with 8088 co-processor

From: Mia Magnusson <>
Date: Wed, 25 Jul 2018 01:02:08 +0200
Message-ID: <>
Den Tue, 24 Jul 2018 14:41:28 -0400 skrev Bill Degnan
> Before I do this on my perfectly happy P500, has anyone put a 8088
> co-processor on a P-500 before?  Any concerns?  I will probably run a
> fan on the system and leave the lid loose as the daughter card may
> sit too high to close the lid.  I will attempt to boot MS DOS and
> CP/M 86, but there are no known color and SID tests what would I
> expect to gain from putting the 8088 on a P500 vs. the risks?
> Given this is a rare combo of hardware, please send me any tests you
> wish to have done, I can make D80 images from PRG files if anyone
> wants to whip up experiemental programs.  It would be great if I can
> get my uIEC to work on the P500 as I did for my B128 and I will try
> that.
> I don't recall there being a BASIC that runs off the 8088 that also
> uses color, but I guess that's the whole point of the original thread
> that sparked interest in the P500 to begin with.

Even though the 8088 card is really rare and the P 500 even rarer, they
both only contain chips that are rather common.

The only thing I'm not totally sure of is if the equations for the
programmable logic chips in the P-500 are correct. They are listed in
the schematics. That's about the only IC's where you can't just put in
a replacement IC from a scrapped C64 or PC compatible machine, or
program a standard eprom with a file image from Zimmers or some other

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Received on 2018-07-25 02:00:05

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