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From: noman@gatech.CSNET (Jeffrey L. Grover)
Newsgroups: net.arch
Subject: Re: IBM 801
Message-ID: <2207@gatech.CSNET>
Date: Tue, 10-Dec-85 09:58:42 EST
Article-I.D.: gatech.2207
Posted: Tue Dec 10 09:58:42 1985
Date-Received: Wed, 11-Dec-85 04:21:59 EST
References: <632@mit-eddie.UUCP> <2191@gatech.CSNET> <373@amiga.amiga.UUCP>
Distribution: net.arch
Organization: School of Information and Computer Science, Georgia Tech, Atlanta
Lines: 31
Summary: XT/370 has two 68000's

In article <373@amiga.amiga.UUCP>, bruceb@amiga.UUCP (Bruce Barrett) writes:
> In article <2191@gatech.CSNET> noman@gatech.CSNET (Jeffrey L. Grover) writes:
> >	3. The ~801 architecture is being emulated via
> >		microcode on a 68000 ( <<== ?? )
> 
> 	Well, IBM has had practice with this sort of thing...The IBM
> XT/370 emulated a 370 by re-microcoding 1 (or 2??) 68000's and an 8087
> (for floating point).
> 
> --Bruce Barrett

	yep, IBM put 2 68000's in the XT/360

		1. microcoded to execute as a 360
			sans floating point operations
		2. microcoded as a floating point
			co-processor

	BTW, there is an 8088 in there too ...
		
		it's an I/O processor

-- 
jeffg ( aka noman )

Dept  :  GTRI/CTAD
Office:  ERB rm 34
Phone :  894-3456

GTRI/CTAD ERB rm 34
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