Article View: comp.sys.ibm.pc.misc
Article #7918Re: Math Coprocessors
From: Shawn E Thompson
Date: Wed, 27 Feb 1991 01:35
Date: Wed, 27 Feb 1991 01:35
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1551 bytes
In article <1991Feb26.201401.22738@sj.ate.slb.com>, poffen@sj.ate.slb.com (Russ Poffenberger) writes... >In article <84380001@hpfcmdd.hp.com> edm@hpfcmdd.hp.com (Ed Moore) writes: >>The MHz rating on an 80387 chip is the speed at which Intel certifies it >>will run. If you put a 16 MHz chip into a 20 MHz computer, the clock in the >>computer forces the chip to run at 20 MHz. That should work _most_ of the >1601 Technology Drive CIS: 72401,276 >San Jose, Ca. 95110 (408)437-5254 This may be true, but in direct answer to my original question: I have learned that the 286 chip uses a 1/2 clock speed divide (meaning it operates at a sub-scalar speed of .5 of the clock cycle speed. The 287 chip operates at 1/3 the clock speed. Heat is a factor, but my question, answered by many (thanks!) was the above 2/3 ratio. st
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!asuvax!ncar!elroy.jpl.nasa.gov!sdd.hp.com!zaphod.mps.ohio-state.edu!ub!ubvmsa.cc.buffalo.edu!v087mxgb From: v087mxgb@ubvmsa.cc.buffalo.edu (Shawn E Thompson) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: Math Coprocessors Message-ID: <62037@eerie.acsu.Buffalo.EDU> Date: 27 Feb 91 01:35:34 GMT References: <1991Feb19.214611.31858@slate.mines.colorado.edu> <84380001@hpfcmdd.hp.com> <1991Feb26.201401.22738@sj.ate.slb.com> Sender: news@acsu.Buffalo.EDU Reply-To: v087mxgb@ubvmsa.cc.buffalo.edu Organization: University at Buffalo Lines: 18 Nntp-Posting-Host: ubvmsa.cc.buffalo.edu News-Software: VAX/VMS VNEWS V1.3-4.4