Article View: comp.arch
Article #20857Re: Core Memory
From: Joe Buck
Date: Fri, 21 Apr 1989 21:11
Date: Fri, 21 Apr 1989 21:11
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In article <15465@bellcore.bellcore.com> sjs@ctt.bellcore.com (Stan Switzer) writes: >The Honeywell 716 minicomputer (I believe these were once used as ARPA >IMPs, but we used one as an RJE station) was designed so that memory >would cool fast enough that you could access a core every other cycle >without damaging it. The machine manuals were very explicit in their >warnings that getting the machine into a one-instruction loop would >fry the instructions core plane (as would an indirect cell pointing to >itself). Ah, the infamous HCF (halt and catch fire) instruction! :-) -- -- Joe Buck jbuck@epimass.epi.com, uunet!epimass.epi.com!jbuck
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!lll-lcc!pyramid!epimass!jbuckReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!lll-lcc!pyramid!epimass!jbuck From: jbuck@epimass.EPI.COM (Joe Buck) Newsgroups: comp.arch Subject: Re: Core Memory Message-ID: <3105@epimass.EPI.COM> Date: 21 Apr 89 21:11:40 GMT References: <1210@twitch.UUCP> <8164@super.ORG> <530@aurora.AthabascaU.CA> <15465@bellcore.bellcore.com> Reply-To: jbuck@epimass.EPI.COM (Joe Buck) Distribution: na Organization: Entropic Processing, Inc., Cupertino, CA Lines: 12