On Sun, 1 Mar 2009, Chuck Guzis wrote:
I assumed the
rabbit was a z180, you learn something new every day. I
have done a few designes with z180's, but I cant even rememer what
language tools I used at this point.
The Rabbit Semiconductor R2000, R3000, R4000 series (still being
made) are Z80/Z180 "sort-of". Lots of "rarely used" opcodes (e.g.
DAA, IN, OUT, etc.) are replaced by other instructions. See:
http://www.rabbit.com/documentation/docs/manuals/Rabbit4000/Instructio
nReference/
How much patching do you think it would take to get CP/M to run on an
R3000?
There was a long thread pertaining to this on comp.os.cpm recently. The
concensus was that while a port of CP/M itself could be done, there were
potential issues with applications and utility programs.
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