Sujet : Re: The Seymour Cray Era of Supercomputers
De : aek (at) *nospam* bitsavers.org (Al Kossow)
Groupes : comp.archDate : 19. May 2025, 17:49:37
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <100fnf2$1nfaj$1@dont-email.me>
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My question was about absolute numbers. Volts, amperes, nanoseconds.
Here is Mark's page, which is a good place to start for information on CDC pre-ECL tech
https://people.computing.clemson.edu/~mark/cdc6600.htmlThe issue is the technology CDC used for the gates.
Cray understood that ECL integrated circuits draw constant current no matter if they are
a logic 1 or 0, so it presents a constant load on the power supply.
CDC didn't start using ECL integrated circuits until the Cyber 170 series
so the load on their power supplies varied with the state of the gates.
There are module schematics for the cordwood modules CDC used on bitsavers, I'm
just having some trouble locating the ones used in the 7600