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CP/M on the PT Sol-20

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Subject: CP/M on the PT Sol-20
From: gamingaltlog@gmail.com (Loren Waldo)
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by: Loren Waldo - Tue, 6 Feb 2024 15:40 UTC

Hello,
I'm looking for a bit of help with CP/M and was hoping I could get some help, I'm trying to get a copy of CP/M 2.2 working on my Sol-20 in combination with my Morrow Disk Jockey; However, I'm not exactly sure how to patch the Morrow version of CP/M to work with the somewhat bizarre memory map of the Sol-20. If anybody has any resources to help, I'd really appreciate it..

Re: CP/M on the PT Sol-20

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Subject: Re: CP/M on the PT Sol-20
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From: john_crane_59@yahoo.com (John Crane)
Date: Tue, 6 Feb 2024 11:27:27 -0600
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by: John Crane - Tue, 6 Feb 2024 17:27 UTC

On 2/6/24 9:40 AM, Loren Waldo wrote:
> Hello,
> I'm looking for a bit of help with CP/M and was hoping I could get some help, I'm trying to get a copy of CP/M 2.2 working on my Sol-20 in combination with my Morrow Disk Jockey; However, I'm not exactly sure how to patch the Morrow version of CP/M to work with the somewhat bizarre memory map of the Sol-20. If anybody has any resources to help, I'd really appreciate it.
>

I seem to recall an article in the Sol users club about this. The main
issue is the memory space is not a contiguous block like CPM likes. The
ROMS are sitting in there and have to be reprogrammed for new addresses
and the hardware logic changed to address them at the new location. This
will result in a CPM system with less than max memory. The alternative
it to ditch the ROM, and have a CPM only machine.

But it seems a waste with so many other vanilla CPM machines out there.
The Sol is such a unique system, I didn't want to alter mine too much.

I opted for a Micropolis disk system that behaves nicely with the Sol
ROMS. Not CPM, but plenty of functionality (Assembler, BASIC, etc.) and
way better than cassette. I also have 2 Helios units, both with broken
gears requiring some 3D printing when I can get around to it. Horrible
design , btw.

-J

"Open Channel D..." -- Napoleon Solo, The Man From U.N.C.L.E.

devel / comp.os.cpm / CP/M on the PT Sol-20

Subject	Author
CP/M on the PT Sol-20	Loren Waldo
Re: CP/M on the PT Sol-20	John Crane