Xref: utzoo comp.sys.ibm.pc:24515 comp.sys.intel:693 comp.unix.microport:2815
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!ukma!rutgers!att!homxb!opus!cab
From: cab@opus.ATT.COM (C. Anthony)
Newsgroups: comp.sys.ibm.pc,comp.sys.intel,comp.unix.microport
Subject: Replacing 286 with 386SX drop in board
Keywords: Does it exist yet?
Message-ID: <70@opus.ATT.COM>
Date: 10 Feb 89 17:11:35 GMT
Distribution: comp
Organization: Bob's Auto Body and Shiatsu
Lines: 27


	For many reasons, I need to run REAL software, the kind
that lets you use huge data structures with out diddling segment
registers or constructing data structures to hide hardware/software
inadequacies.  Typical applications are digital processing of
sampled sounds and computer graphics.  I have a '286 that
runs the UNIX(tm) system and DOS via the UNIX-reboot-DOS-reboot
task switching mechanism :-).  I've used microport SV/AT up to
release 2.4 alternately patching the system, developing, phoning
to ask "is it fixed yet?" and keeping an eye out for a 386 upgrade
method that doesn't involve a motherboard swap or an INBOARD/AT
which wouldn't work in my system.  I've shaken too many bugs
out of the system, timing wise, interrupt wise, software wise, memory
wise, powerwise and other wise to junk the development/testing
environment it constitues for a complete unknown.  So I am looking
for the most non-intrusive way to upgrade.

	Has anyone seen, or is anyone working on a 386SX cum bus interface
that can replace a 286 cpu.  Will it work with a '287.  email
or post.  will summarize if requested.

regards
-- 
          -CAB-        
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