Article View: comp.arch
Article #2445Re: Asynchronous cpu, self-timed cirtuits.
From: Mark G. Johnson
Date: Wed, 04 Oct 1989 22:12
Date: Wed, 04 Oct 1989 22:12
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>... folks from CALTECH on using the self-timed (asynchronous)
>circuits that they've been pushing to build a processor.
>Any comments on this work out there? Any comments on self-timed
>circuits themselves?
Self-timed circuits have been included in commercially available
microprocessors for quite some time. The R2000 has some, and I
doubt it was the first; probably the 8086 / 8088 used s.t. ckts
back in '81.
Of course, every time you buy a DRAM you're buying a temperature
and voltage-variable chain of about 60 self-timed circuits. This
may make you feel {less, more} comfortable about the robustness
and reliability of s.t. circuits.
--
-- Mark Johnson
MIPS Computer Systems, 930 E. Arques, Sunnyvale, CA 94086
(408) 991-0208 mark@mips.com {or ...!decwrl!mips!mark}
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!ctrsol!ginosko!gem.mps.ohio-state.edu!apple!mips!markReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!ctrsol!ginosko!gem.mps.ohio-state.edu!apple!mips!mark From: mark@mips.COM (Mark G. Johnson) Newsgroups: comp.arch Subject: Re: Asynchronous cpu, self-timed cirtuits. Message-ID: <28787@obiwan.mips.COM> Date: 4 Oct 89 22:12:29 GMT References: <5241@dime.cs.umass.edu> Reply-To: mark@mips.COM (Mark G. Johnson) Organization: MIPS Computer Systems, Sunnyvale, CA Lines: 18