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Path: utzoo!utcs!lsuc!pesnta!hplabs!utah-cs!shebs
From: shebs@utah-cs.UUCP (Stanley Shebs)
Newsgroups: net.micro.16k
Subject: Re: Corrigenda (24-bit addresses)
Message-ID: <3229@utah-cs.UUCP>
Date: Mon, 4-Mar-85 13:01:05 EST
Article-I.D.: utah-cs.3229
Posted: Mon Mar  4 13:01:05 1985
Date-Received: Mon, 11-Mar-85 10:57:50 EST
References: <794@sjuvax.UUCP> <5025@utzoo.UUCP>
Reply-To: shebs@utah-cs.UUCP (Stanley shebs)
Organization: Univ of Utah CS Dept
Lines: 21
Summary: 

In article <400@terak.UUCP> doug@terak.UUCP (Doug Pardee) writes:
>
>A *microprocessor* application????   Come on now, let's get serious.
>I _might_ grant that for an AI application you would need that kind
>of high-speed random-access memory, but no sane person would *ever*
>choose a 68xxx/32xxx type processor for AI.  You need a *lot* more
>MIPS than that.

An HP9836 (a vanilla 68000 machine) running Portable Standard Lisp
outperforms a Symbolics and a 780 on some several of the AI-oriented 
Gabriel benchmarks (theorem-provers, game players, and  other things).

The key factor seems to be that the 9836s have *no* virtual memory,
using about 5-10 Mb of real memory instead.  Reduces garbage collection
time and also thrashing due to Lisp's generally random addressing
behavior...

						stan shebs

PS I do have some ideas for AI applications to run on a Cray, but
Cray PSL isn't finished yet!