Article View: comp.arch
Article #20802Re: DARPA supercomputer
From: Randell Jesup
Date: Fri, 21 Apr 1989 02:57
Date: Fri, 21 Apr 1989 02:57
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In article <14903@gryphon.COM> scarter@gryphon.COM (Scott Carter) writes:
>The DARPA GaAs microprocessor project is ongoing; both CDC/TI and
>McDonnell Douglas have contracts. Both have fabricated and run the
>microprocessor core chips (though at rather less than 150 MOPS so far -
>actual speeds are not publishable to my knowledge).
The GE rpm-40 was done, and works (this is the CMOS side of the
same program, 40Mhz). Did something like 40Mhz in (very carefully done)
wirewrap at optimum temp and voltage. Might get more (50?) in a real board
(I left before silicon was available, so this is all second-hand).
I believe Sperry got their chip working also (I saw an early 10Mhz
version).
The GaAs people have their hands full with limited gates (REAL
limited compared to CMOS), clock skew, etc, etc. Clock skew at 100Mhz+
is REAL nasty.
--
Randell Jesup, Commodore Engineering {uunet|rutgers|allegra}!cbmvax!jesup
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!cbmvax!jesup From: jesup@cbmvax.UUCP (Randell Jesup) Newsgroups: comp.arch Subject: Re: DARPA supercomputer Message-ID: <6659@cbmvax.UUCP> Date: 21 Apr 89 02:57:34 GMT References: <9951@polyslo.CalPoly.EDU> <76700063@p.cs.uiuc.edu> <14903@gryphon.COM> Reply-To: jesup@cbmvax.UUCP (Randell Jesup) Organization: Commodore Technology, West Chester, PA Lines: 20