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Groups > alt.folklore.computers > #212468
| From | Rich Alderson <news@alderson.users.panix.com> |
|---|---|
| Newsgroups | alt.folklore.computers |
| Subject | Jupiter alternatives [was Re: DEC] |
| Date | 2020-07-31 21:16 -0400 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <mddv9i3cgiv.fsf_-_@panix5.panix.com> (permalink) |
| References | (5 earlier) <L_AUG.195289$AN2.192375@fx46.iad> <1922456568.617821872.532416.peter_flass-yahoo.com@news.eternal-september.org> <AuEUG.195294$AN2.162013@fx46.iad> <1836069261.617827817.688943.peter_flass-yahoo.com@news.eternal-september.org> <07ce1231-6202-43d2-bfad-d21d3d304fddo@googlegroups.com> |
Terry Kennedy <terry-groups@glaver.org> writes:
> In retrospect, DEC might have been better served by canceling Jupiter but
> marketing one of the 3rd party compatible 36-bit CPUs as a DEC model. This
> had been considered (and dismissed) when Jupiter was in the early planning
> stages.
"one of the 3rd party compatible" CPUs? Which one would that be? When Jupiter
was thought up, there was exactly 1 company making such systems, Foonly--and
every Foonly system was a prototype, according to a friend at SRI who had to
support an installation. (Boards were not interchangeable.)
Systems Concepts marketed their competing system with Fred Wright's memorable
statement that "Mars may be smaller than Jupiter, but it's a lot closer." It
wasn't that much closer. We took delivery of the first customer ship--which
was Mike and Stewart's prototype mahcine!--at LOTS on All Hallows' Eve, 1986,
three and a half years after the Jupiter cancellation.
And the SC-30M was not a Jupiter class machine (as the latter was planned,
although it was probalby a little faster than what was getting built). The
entire point of Mars was a KL-10 clone which was bug-for-bug compatible but
simply faster, built with TTL instead of ECL. They even created Massbus and CI
interfaces to meet the LOTS requirements.
It's a hell of a nice system, but it's not what KL-10 customers were looking
for in the Jupiter.
Cisco never got started on building the ToaD, so they weren't in the running,
and XKL was founded in December 1990. The Toad-1 System was delivered to our
first customers in 1995, more than a decade after the Jupiter cancellation, and
it's in the same speed class as, and a little faster than, SC's Mars. It's
just a whackingly great space reduction on the original with modern (for 1995)
peripherals instead of clinging to Massbus.
NB: The SC-40, the engine which Mike and Stewart licensed to CI$ to build for
themselves, is roughly the same as the SC-30M, with a superspeed floating
point processor built in for roughly 10x improvement over the KL-10 on the
relevant benchmarks.
The only other possibility which even existed when Jupiter was a going concern
was MAXC, a one-off (well, two-off) purpose built clone at Xerox PARC, which
existed only because Xerox management would not buy a DECsystem-10 for the
scientists at PARC to run TENEX on. It was even further from a commercial
possibility than the Foonly systems.
So I repeat: Who are you talking about?
--
Rich Alderson news@alderson.users.panix.com
Audendum est, et veritas investiganda; quam etiamsi non assequamur,
omnino tamen proprius, quam nunc sumus, ad eam perveniemus.
--Galen
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Re: IBM models 91, 195 & CDC 7600 Peter Flass <peter_flass@yahoo.com> - 2020-08-03 07:45 -0700
Re: IBM models 91, 195 & CDC 7600 "Kerr-Mudd,John" <notsaying@127.0.0.1> - 2020-08-01 08:24 +0000
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-08-01 02:30 -0700
Re: IBM models 91, 195 & CDC 7600 robin.vowels@gmail.com - 2020-08-01 02:34 -0700
Re: DEC large computers Quadibloc <jsavard@ecn.ab.ca> - 2020-08-01 00:51 -0700
Re: DEC large computers robin.vowels@gmail.com - 2020-08-01 02:23 -0700
Jupiter alternatives [was Re: DEC] Rich Alderson <news@alderson.users.panix.com> - 2020-07-31 21:16 -0400
Re: Jupiter alternatives [was Re: DEC] Robert Swindells <rjs@fdy2.co.uk> - 2020-08-01 01:56 +0000
Re: Jupiter alternatives [was Re: DEC] Adam Sampson <ats@offog.org> - 2020-08-01 15:59 +0100
Re: Jupiter alternatives [was Re: DEC] Rich Alderson <news@alderson.users.panix.com> - 2020-08-01 22:09 -0400
Re: Jupiter alternatives [was Re: DEC] Rich Alderson <news@alderson.users.panix.com> - 2020-08-01 22:07 -0400
Re: DEC usenet@only.tnx (Questor) - 2020-08-03 00:32 +0000
Re: DEC Terry Kennedy <terry-groups@glaver.org> - 2020-08-02 23:54 -0700
Re: DEC Peter Flass <peter_flass@yahoo.com> - 2020-08-03 07:45 -0700
Re: DEC robin.vowels@gmail.com - 2020-08-03 09:16 -0700
Re: DEC Quadibloc <jsavard@ecn.ab.ca> - 2020-08-03 10:10 -0700
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