Date   : Thu, 17 May 1990 02:56:31 GMT
From   : pacbell.com!pacbell!sactoh0!ianj@ames.arc.nasa.gov (Ian R. Justman)
Subject: Where can I get MP/M?

In article <1229@abvax.UUCP>, dah@odin.icd.ab.com (Douglas Henderson) writes:
> 
> I am looking for a copy of MP/M for an Apple IIe system.  Is this
> still for sale or is a copy available on the net?
> 

I wish you the absolue best of luck because there is NO such thing
because the Apple II series is not designed to run MP/M (or CP/M
for that matter.  I know becuse I have an Apple ][ Plus with a
Microsoft SoftCard and an S-100 bus computer with the necessary
hard- and software to run MP/M.  It takes more than software to
get MP/M set up; it takes some more hardware.  In my case, my
processor switches between tasks; it's just one Z80 running 3 users.
The Apple, I seriously doubt, could handle that type of load.  It
would have to be a concurrent system (several processors running
separate of each other; Applicards, with a little work, would
probably work, but no more than, say 3 or 4 users.  Microsoft and
any other systems that take full control of the Apple bus are out
of the question.  A footnote to the Applicard method, you have to
have character I/O on each board because if you went through the
Apple keyboard, it would kinda defeat the function of MP/M if
you're wanting multiple users with single tasks; single user with
multiple tasks, now that is different.  Yet another footnote on the
SoftCArd and equivalents, that is COMPLETELY out of the question
because those cards require that the Apple have lots of memory,
whereas the Applicards have their own memory and can operate
independantly of the Apple, except for I/O.  Plus, the SoftCard is
phase-locked with the Apple's clock and it would be too slow
because the Z80 can only run at 2MHz, and the Applicards have their
own clock and can run up to 6 MHz or 8MHz with a Z80H and a couple
of modifications.

I seem to have rambled on a bit.  Have fun, and like I said before,
good luck!!!  You're gonna need it!!!  (grinsmilegrin)

kkk
-- 
Home:   Ian Justman   |UUCP: ...!uunet!mmsac or        |"One of the few
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End of INFO-CPM Digest V90 Issue #86
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