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From: jru@etn-rad.UUCP (John Unekis)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Intel Microprocessors
Message-ID: <244@etn-rad.UUCP>
Date: Mon, 10-Aug-87 20:18:42 EDT
Article-I.D.: etn-rad.244
Posted: Mon Aug 10 20:18:42 1987
Date-Received: Wed, 12-Aug-87 02:14:27 EDT
References: <234@etn-rad.UUCP> <174200061@uxc.cso.uiuc.edu> <414@parcvax.Xerox.COM>
Reply-To: jru@etn-rad.UUCP (0000-John Unekis)
Organization: Eaton Inc. IMSD, Westlake Village, CA
Lines: 23

In article <414@parcvax.Xerox.COM> burton@parcvax.xerox.com.UUCP (Philip M. Burton) writes:
>
>IBM also used a slightly modified version of the 68000 to build a "370 on a
>chip"  I recall that this was done about 1980, using two 68000's with
>modified instruction sets.  I'm not sure if this ever made it to a product,
>but I read about it in Electronics or Electronics Design, or a similar
>mag.
...
   Yes, it was announced as a product, the PC AT/370. It didn't live long 
   though. It used 2 MC6800 chips with the instruction set completely redone
   to be a clone of the 370 (they had to start with the 68K because of the
   370's 32 bit word and 16 general purpose registers). This was not a 
   Motorola product, and the chips bore no resemblance in function to the
   original MC68000. It failed as a product because it achieved a blinding
   speed of 0.25 MIPS, and used the widely unaccepted operating system VM.
   Somehow even IBM couldn't convince people that they wnted to give up 
   the user friendly interface of a PC for a mainframe imitator at half
   the CPU speed. I wonder if this bodes ill for the new VM based IBM
   system 9370 which they are trying to call the 'VAX-KILLER' Chuckle-chuckle-
   snort-giggle.

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