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From: rick@genrad.com (Richard A. Frerichs)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: 80386-33 and "double sigma rule" ??
Message-ID: <39689@genrad.UUCP>
Date: 16 Nov 90 17:26:08 GMT
References: <3720001@hpsgwp.sgp.hp.com> <15882@cbmvax.commodore.com>
Sender: news@genrad.UUCP
Reply-To: rick@gandalf.genrad.COM (Richard A. Frerichs)
Organization: GenRad, Inc., Concord, Mass.
Lines: 23

>In article <3720001@hpsgwp.sgp.hp.com> plim@hpsgwp.sgp.hp.com (Peter Lim) writes:
>
> When I was shopping for 20 to 25 MHz 80386 CPU's, I was told that the
> bug free version is those with double sigma marking. I did saw them.
> Now I am interested in 80386-33. It trouble me that I don't see the
> same double sigma marking on the CPUs I have looked at so far.
> 
> Does the double sigma rule apply to 33 MHz 80386 or is it only to
> the slower parts ? In another word, how can I tell if a 33 MHz 80386
> is a bug free version? 

I had this question recently about a 25MHz 80386DX that did not have the
double sigma markings.  My previous motherboard had a 20 MHz 80386DX which
did have the double sigma markings.  When I got the new motherboard and did
not see the double sigma markings, I called our local Intel Rep and he told
me that the latest die revision was "sx218".  This number appears below the
80386 number.  The sx218 does NOT have anything to do with the 386SX chip!
					Rick Frerichs
					GenRad Inc.


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