12 Nov
2001
12 Nov
'01
10:25 a.m.
AFAIK you didn't. The CoCo 2 can run OS-9 (I ran
such a system for many
years before I upgraded to a CoCo 3), and there's no MMU in that. The
memory map is essentially all RAM (64K RAM, no paging or anything like
that), with a little lost to I/O near the top of the address space.
My SWTPc S/09 has 56k of RAM and a 6809 and it's set up to
run OS-9 without an MMU. It does some interesting address
translation using a DAT RAM though that allows it to have more RAM
than that, though I don't.
Jeff
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