Re: Software for MS-DOS 1.25

From: Mia Magnusson <mia_at_plea.se>
Date: Sun, 22 Oct 2017 02:58:34 +0200
Message-ID: <20171022025834.00004081@plea.se>
Den Sat, 21 Oct 2017 06:01:03 +0200 skrev Michał Pleban
<lists@michau.name>:
> Mia Magnusson wrote:
> > Maybe the improved board could be an add-on to another Commodore
> > 8-bit machine. For example the 8296 has faster memory than it
> > actually needs as it in one 1MHz half cycle does two fetches for
> > the video hardware. That would mean that with a reprogrammed PLA
> > the CPU could use the memory at 2MHz :)
> 
> There is a 6809 card for the 8296 but I think it runs at 1 MHz?
> Something similar could be done here, but running an 8088 at 1 MHz
> does not look promising. The 8296 and CBM-II have very different
> hardware architecture.

Well, by doing new PLAs for 8296 it could be possible to access it's
ram at 2MHz. That would probably be good enough for shared memory.
(There would anyway be a need for more ram as 8926 only has 128k, and
that extra ram could be local to the 8088).

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Received on 2017-10-22 01:01:10

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