Designing around a 6502 (was Re: Assembly on a Apple IIc+)

From: Paul Berger <sanepsycho_at_globaldialog.com>
Date: Sun Feb 9 20:00:00 2003

On Sun, 2003-02-09 at 17:19, Bill Sudbrink wrote:
> > This gives me awfully devious ideas... First, were there any 'multitasking
> > machines' designed around the 6502? If you wanted to do multitasking, it
> > seems like you could design a fairly simple MMU that would swap out the
> > zero-page and stack (or all of the memory pages) for different ones,
> > depending on the running task. Leaving only a few registers that need to
> > be saved, it would leave a very small overhead for task swapping.
>
> Ohio Scientific OS-65U.

Never played with the C3 series, had a toy C1P myself, from what I
remember each user had a 48K memory card that bank switched, not an
elegant solution but worked.

::sigh:: 6502 loved it and hated it.

Paul
Received on Sun Feb 09 2003 - 20:00:00 GMT