Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!uwmcsd1!ig!agate!ucbvax!ucsfcgl!cca.ucsf.edu!root
From: root@cca.ucsf.edu (Computer Center)
Newsgroups: comp.arch
Subject: Re: Superoptimiser.
Summary: the stretch was before the 360 series
Message-ID: <1300@ucsfcca.ucsf.edu>
Date: 6 Jul 88 02:58:35 GMT
References: <28200172@urbsdc> <11458@steinmetz.ge.com>
Organization: Computer Center, UCSF
Lines: 32

In article <11458@steinmetz.ge.com>, davidsen@steinmetz.ge.com (William E. Davidsen Jr) writes:
| In article <28200172@urbsdc> aglew@urbsdc.Urbana.Gould.COM writes:
| 
| | The IBM 360 model 97 (I always get the model number wrong;
| | anyway, one of the early 360s) did this.
| 
|   Was that the "stretch" model? I can't remember the model number, but
| very few were ever made. It supposedly was a reasearch item which went


The Stretch was the 7030; it established technology which later appeared
in the 7090 and 7094. This was several years before the 360 series and
"Solid Logic Technology" (SLT). The 7000 series machines were discrete
transistor based.

Much of the technology was downgraded going from the 7030 to the 7090;
e.g. the Stretch disk ran the disk access comb in parallel while the
7090 etc. version (1301) did a head select and read from one track
at a time.

I don't believe there was a Model 97; the high speed scientific machine
was the Model 91; the fast general purpose machine was the Model 85.
There was also a Model 195 about which I have no details. IBM allegedly
lost money on each 91 and built them only to keep CDC out of prestige
accounts.

Thos Sumner       (thos@cca.ucsf.edu)   BITNET:  thos@ucsfcca
(The I.G.)        (...ucbvax!ucsfcgl!cca.ucsf!thos)

OS|2 -- an Operating System for puppets.

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