Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!blake!Tomobiki-Cho!mrc
From: mrc@Tomobiki-Cho.CAC.Washington.EDU (Mark Crispin)
Newsgroups: comp.arch
Subject: Re: What is a Mainframe?
Message-ID: <3051@blake.acs.washington.edu>
Date: 1 Aug 89 19:51:23 GMT
References: <10205@boulder.Colorado.EDU> <3469@csd4.milw.wisc.edu>
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Organization: Mendou Zaibatsu, Tomobiki-Cho, Butsumetsu-Shi
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In article <3469@csd4.milw.wisc.edu> jgd@csd4.milw.wisc.edu writes:
>And then compare these to the IBM 7090/7094 -- 36 bit words, one's complement,
>, load/store instruction set, etc. etc.  (Was the Dec-20 one's complement?)

The PDP-10 (the DEC-20 was a PDP-10 running the TOPS-20 operating
system) was a two's complement machine.  The influence of the 7090
was mostly in the word size and in having efficient instructions
to manipulate halfwords for Lisp.


Mark Crispin / 6158 Lariat Loop NE / Bainbridge Island, WA 98110-2020
mrc@CAC.Washington.EDU / MRC@WSMR-SIMTEL20.Army.Mil / (206) 842-2385
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