Groups > alt.folklore.computers > #223266

Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022

From	Anne & Lynn Wheeler <lynn@garlic.com>
Newsgroups	alt.folklore.computers
Subject	Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022
Date	2022-12-25 09:12 -1000
Organization	Wheeler&Wheeler
Message-ID	<87wn6fs3fk.fsf@localhost> (permalink)
References	(6 earlier) <1585529182.668284324.850327.peter_flass-yahoo.com@news.eternal-september.org> <871qopg8qi.fsf@localhost> <20221223214212.a86c268e81b03fd2dd00430e@eircom.net> <to6p92$28rff$5@dont-email.me> <80deqhlgr5kccskhpqo5rqfqqrc2j18ptm@4ax.com>

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D.J. <chucktheouch@gmnol.com> writes:
> The Cray YMP-2 had a non-conductive fluid that flowed across the
> circuit boards, then out to a head exchanger.

IBM water cooled machines had flow sensor on inboard fluid side but not
on outboard side of heat exchanger ... and a customer machine outboard
side lost water flow ... by the time the thermal sensor registered
temperature was increasing (and shutoff power) ... it was too late and
circuits fried.  All heat exchangers were then retrofitted with flow
sensor on the outboard side.

as periodically mentioned, during Future System project (in first half
of 70s), 370 projects were being shutdown (FS was going to completely
replace 370s and completely different). When FS imploded there was mad
rush to get stuff back into the 370 product pipelines, including kicking
off quick&dirty 3033 & 3081 in parallel.
http://www.jfsowa.com/computer/memo125.htm

The 370 emulator minus the FS microcode was eventually sold in 1980 as
as the IBM 3081. The ratio of the amount of circuitry in the 3081 to its
performance was significantly worse than other IBM systems of the time;
its price/performance ratio wasn't quite so bad because IBM had to cut
the price to be competitive. The major competition at the time was from
Amdahl Systems -- a company founded by Gene Amdahl, who left IBM
shortly before the FS project began, when his plans for the Advanced
Computer System (ACS) were killed. The Amdahl machine was indeed
superior to the 3081 in price/performance and spectaculary superior in
terms of performance compared to the amount of circuitry.]

... snip ...

the enormous number of circuits for 3081 helped motivate TCMs ... to
pack them in reasonable sized physical volume
https://www.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV2137.html

... note above marketing respinning the enormous number of circuits,
also the increased heat density significantly exacerbated sensitivity to
loss of cooling.

Note initial 3081D was two processor claiming 5mips/processor (although
several benchmarks were slower than 4.5mips 3033). IBM then doubled the
cache size for 3081K claiming 7mips/processor (aka from improved cache
hit rate, with some of those benchmarks now equivalent to 4.5mips 3033
or slightly better, see previous post increasingly machine throughput
was becoming increasingly sensitive to cache miss and wating on memory)
... or two processor aggregate of 14mips claimed.  By comparison, the
single processor Amdahl benchmarked at around 13mips.

shutdown of ACS/360
https://people.cs.clemson.edu/~mark/acs_end.html

-- 
virtualization experience starting Jan1968, online at home since Mar1970

Thread

TOPS-20 Boot Camp for VMS Users 05-Mar-2022 "Stephen M. Jones" <smj@ma.sdf.org> - 2022-03-02 21:32 +0000
  Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-03 14:30 +0000
    Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-03-03 16:38 +0000
      Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-03 17:13 +0000
        Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-03 15:33 -0500
          Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-03 21:55 +0000
            Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-04 12:06 -0700
              Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Paul Rubin <no.email@nospam.invalid> - 2022-03-04 13:23 -0800
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-06 17:29 +0100
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-06 11:34 -0700
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-06 19:40 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charles Richmond <codescott@aquaporin4.com> - 2022-12-23 11:49 -0600
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-23 10:34 -1000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-12-23 21:42 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Vir Campestris <vir.campestris@invalid.invalid> - 2022-12-24 11:54 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmnol.com> - 2022-12-24 11:17 -0600
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmnol.com> - 2022-12-24 18:01 -0600
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-12-25 11:24 -0700
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-25 09:12 -1000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Vir Campestris <vir.campestris@invalid.invalid> - 2022-12-30 17:06 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-30 19:09 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmnol.com> - 2022-12-30 16:11 -0600
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Thomas Koenig <tkoenig@netcologne.de> - 2022-12-30 20:22 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmnol.com> - 2022-12-30 16:12 -0600
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-30 23:44 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-23 12:18 -1000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-24 03:43 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-24 07:55 -1000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-12-24 11:08 -0700
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-12-24 18:36 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-24 21:09 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-24 14:03 -1000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-24 14:46 -1000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Paul Rubin <no.email@nospam.invalid> - 2022-03-06 11:17 -0800
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 17:53 +0100
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Vir Campestris <vir.campestris@invalid.invalid> - 2022-03-07 22:02 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charles Richmond <codescott@aquaporin4.com> - 2022-12-23 11:55 -0600
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-12-23 12:27 -0700
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-03-07 03:11 +0000
              Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Quadibloc <jsavard@ecn.ab.ca> - 2022-12-30 13:57 -0800
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Niklas Karlsson <nikke.karlsson@gmail.com> - 2022-12-30 22:11 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-30 23:44 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Niklas Karlsson <nikke.karlsson@gmail.com> - 2022-12-30 23:56 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 cb@elaine.df.lth.se (Christian Brunschen) - 2022-12-31 09:02 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-12-30 20:44 -0500
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-12-30 20:08 -0700
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Quadibloc <jsavard@ecn.ab.ca> - 2022-12-31 00:25 -0800
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-12-31 13:39 +0100
          Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Bob Eager <news0009@eager.cx> - 2022-03-04 00:46 +0000
            Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 "Stephen M. Jones" <smj@ma.sdf.org> - 2022-03-04 18:49 +0000
              Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 drb@ihatespam.msu.edu (Dennis Boone) - 2022-03-04 14:55 -0600
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-04 22:14 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Bob Eager <news0009@eager.cx> - 2022-03-04 22:17 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 David Lesher <wb8foz@panix.com> - 2022-03-06 04:35 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-03-06 05:40 +0000
            Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-04 22:46 -0500
          Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-06 17:21 +0100
            Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-06 11:34 -0700
              Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 17:42 +0100
            Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-06 20:43 -0500
              Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 15:07 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 17:51 +0100
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 17:07 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-07 11:47 -0700
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 19:19 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Andreas Eder <a_eder_muc@web.de> - 2022-03-08 10:08 +0100
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-08 07:49 -0700
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-03-08 19:47 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Bob Eager <news0009@eager.cx> - 2022-03-09 01:03 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 20:18 +0100
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 19:37 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Dan Espen <dan1espen@gmail.com> - 2022-03-07 14:53 -0500
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 20:43 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-03-07 19:52 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-07 17:18 -0500
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 22:33 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 22:58 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-08 00:06 +0100
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-08 07:49 -0700
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-08 15:22 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-08 11:17 -0700
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Vir Campestris <vir.campestris@invalid.invalid> - 2022-03-08 21:09 +0000
                Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-08 21:33 +0000
              Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 20:24 +0100
      Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-03 15:24 -0500
        Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-03-03 21:06 +0000
          Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-04 22:47 -0500
    Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-04 12:06 -0700
    Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmail.com> - 2022-03-07 10:48 -0600
      Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 17:03 +0000
        Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmail.com> - 2022-03-07 19:52 -0600
          Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Fred Smith <fred@thejanitor.corp> - 2022-03-08 04:13 +0000
            Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-08 16:32 +0100

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