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From: josh@polaris.UUCP (Josh Knight)
Newsgroups: net.arch
Subject: Re: Re: Re: RISC/CISC - IBM mainframes
Message-ID: <160@polaris.UUCP>
Date: Thu, 20-Jun-85 23:22:25 EDT
Article-I.D.: polaris.160
Posted: Thu Jun 20 23:22:25 1985
Date-Received: Sun, 23-Jun-85 15:04:25 EDT
References: <7302@watdaisy.UUCP> <33500001@siemens.UUCP> <1073@peora.UUCP>
Organization: IBM Research, Yorktown Heights, N.Y.
Lines: 32


 
 > > Didn't Burroughs do something like this with one of its computers?
 > > I think it was the B1700.
 >
 > I think you are right!  I have never worked with the B1700, but know people
 > who have, and who felt that it was a really good machine.
 >
 > NCR also has done this for many years.  ...
 > --
 > Full-Name:  J. Eric Roskos
 
 
Then there was the "EMMY" processor used for reseach at Stanford by a
group lead by Prof.  M.J. Flynn.  Several PhD thesis were done using
various versions of it, and (at least) Fortran and Pascal "machines"
were implemented for it.  There were also emulators of "standard"
architectures, notably the PDP-11 (that particular implementation was
complete enough to run a Version 6 Mini Unix), as well as an obscure
Danish computer, the RC4000.  There was also a relatively complete IBM
360 emulation.  A modified version of "EMMY" was used by ICL as the
micro-engine for one of their processors.
 
BTW the RC4000 may have been emulated on as many architectures as any
other computer.  I know of a C implementation that ran on a VAX (mine),
PDP-11 and DG Nova assembly language versions, the above mentioned
"EMMY" version and I think they simulated the beast on something before
they built it.
 
		Josh Knight, IBM T.J. Watson Research
    josh at YKTVMH on BITNET, josh.yktvmh.ibm-sj on CSnet,
    ...!philabs!polaris!josh