Re: CP/M for Model III (was cp/m 86 for IBM PC?)
- On Thu, 10 Dec 2009, Dan Roganti wrote:
>> I'd be very surprised if you did. CP/M wouldn't run on an unmodifiedNever tried it. Here's a link for a mod for the Model I:
>> Model 3 because it had a ROM mapped into low memory that couldn't be
>> moved. CP/M requires the space starting at from 0000H - 00FFH to be RAM.
>> I believe there were hardware modifications available for the Model III to
>> allow CP/M to run: I know there were for the Model I.
> well that shouldn't be to hard to modify.
> I would like to give it a try.
> Is that the only change needed ?
> Wouldn't it need some kind of boot rom for CP/M ?
The Model III only has (up to) 48KB, so you'd have to run CP/M without
much TPA. See if you can dig up a schematic for an Omikron Mapper. There
was one available for the Model I or the Model III.
Mike Loewen mloewen@...
Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/