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From: an288@cleveland.Freenet.Edu (Mark Hittinger)
Newsgroups: comp.arch
Subject: re: Wanted DEC-10/20 stuff, and emulator
Message-ID: <9104171333.AA12267@cwns1.INS.CWRU.Edu>
Date: 17 Apr 91 13:33:48 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: an288@cleveland.Freenet.Edu
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I've been working on a 10 emulator off and on since they took mine away 
from me (sniff) back in 83.  I was never able to achieve enough performance
to justify until recently, with the new MIPS chip and the 80486.  Its
serious enough to consider now.  I am up to KI-10 but I am having trouble
with the tops-20 pager and the extended instructions.  I know of two other
people that are working on this also.  Hopefully something will turn up for
you eventually.....hang on to those backups ! hahaha

It IS difficult writing an emulator when you no longer have access to the
original hardware (to check out ambiguities in the hardware manual).

Anyhow....it should be possible to construct a small pc card to emulate
a kl10b with around...say....   .9MIPS to 1MIP.  The pc would serve as the
I/O system.  This would mean a re-write of the i/o internals of the particular
operating system....be it  t-10,t-20, tenex, twenex, or ITS.  

good luck, and let me know if you hear of anything


--
Mark Hittinger [answering machine (606)-272-2424
PO BOX 43358
Middletown, KY 40243