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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>
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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.


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