ajp166 at bellatlantic.net
Thu Apr 19 06:41:26 CDT 2007
>Subject: Re: CP/M survey
> From: Chris M <chrism3667 at yahoo.com>
> Date: Wed, 18 Apr 2007 14:10:05 -0700 (PDT)
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>--- Allison <ajp166 at bellatlantic.net> wrote:
>> >Subject: CP/M survey
>> > From: Mark Tapley <mtapley at swri.edu>
>> > Date: Wed, 18 Apr 2007 09:09:45 -0500
>> > To: cctalk at classiccmp.org
>> >DEC Rainbow (8087, 832k (max for -A model), but
>> that's irrelevant to CP/M-80).
>> Not true as the rainbow also ran CP/M-80/88 as it
>> was a dual CPU (has a z80).
> Could it access more then 64k under CP/M-80? Don't
>you mean CP/M-86? Not to nit pick...
No. However there was software to use the 8088 and the bulk ram
as a ramdisk.
CP/M80 (other than V3) didnt care there was more than 64k,
Applications that ran under it (mutiplan, Dbase, others)
didn't care there was more than 64k (z80 address space) as
they were all written back when 64k was a BIG system and
MMUs were uncommon.
> I don't know about specific Rainbow revisions, but I
>was under the impression the 'bow could go up to 896k.
>Maybe I'm thinking of the Tandy 2000 via an 3rd party upgrade.
The Rainbow was one of the few that could beat the 640k limits.
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