Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!newstop!texsun!digi!jgay
From: jgay@digi.lonestar.org (john gay)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: How much for a 487SX?!!
Message-ID: <1991Apr30.164051.6294@digi.lonestar.org>
Date: 30 Apr 91 16:40:51 GMT
References: <1991Apr27.194311.15636@bronze.ucs.indiana.edu>
Organization: none
Lines: 23

From article <1991Apr27.194311.15636@bronze.ucs.indiana.edu>, by ntaib@silver.ucs.indiana.edu (Nur Iskandar Taib):
> Speaking of the 487SX... here is something quite weird. The latest
> IBM products circular mentions a 486SX machine. Forget what its
> called, but IBM mentions an upgrade to the 487SX. Now comes the
> weird part. To get the 487SX upgrade, IBM wants the 486SX chip
> returned!!!! This tells us that the 387SX is no coprocessor, it 
> IS the microprocessor. In which case one would like to know what
> the difference between the 487SX and the 486DX (?) is!
> 
> I think someone at IBM goofed big time...



According to the latest (4/29) EE Times the 487SX IS a 486DX with different
pinouts.  The 487SX is supposed to disable the 486SX and then become the
main processor/co-processor.  The 487SX has different pinouts and a higher
price (and of course lower speed - 20 MHz) than the 486DX to keep people from
just selling 487SXs as processors.




john gay.