Re: CP/M for any Commodore

From: David Wood (jbevren_at_starbase.globalpc.net)
Date: 2008-03-19 04:45:38

[Top posted reply, sorry in advance]

The idea of running cp/m concurrently with a 6502 host isn't new.
http://mylinuxisp.com/~jdbaker/oldsite/SmallSys/AppliCard.html

The link above contains information about an apple2 card that hosts a z80,
its own ram, and a bus interface between the cp/m system and the host
system.  In concept, the BIOS runs on the 6502 concurrently with CP/M on the
AppliCard.  This would allow any device supported by the host system to be
used by the CP/M system, i.e. disks, network, console, printer, serial..

-jbevren

On Tue, 18 Mar 2008 ruud.baltissen@apg.nl wrote:

> Hallo allemaal,
>
>
> I found some old Z80 operated printer buffers. These are nothing more
> then a Z80 CPU, some I/O to communicate with the printer(s) and the
> attached computers, quite some RAM (256 KB IIRC) and the needed
> glue-logic. I lately also got a CP/M box for the BBC. This is nothing
> more then a 6522 and all the things mentioned above (although only 64 KB
> RAM).
>
> Attaching a 6522 (or 6526) to whatever Commodore shouldn't be a problem.
> Finding a printer buffer with a Z80 could be a problem. But IMHO an old
> obselete MSX or CPC-64/128 can do the trick as well. The advantage of
> such a system is that during debugging messages can be displayed on the
> screen.
>
> Next step is the software of course: a BIOS for the Z80 part and a
> driver (by lack of another name) for the 6502. Maybe I can take the BIOS
> of the BBC-Z80 card as base.
>
> Is there any interest in this?
>
> And don't worry, I first finish 1541IDE :)
>
>
> --
>      ___
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