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From: rr@pika.mips.com (Robert "Bob" Rodriguez)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 386 and 386SX...what is the difference?
Message-ID: <35642@mips.mips.COM>
Date: 7 Feb 90 21:52:12 GMT
References: <2757@jato.Jpl.Nasa.Gov> <13214.25cec56f@max.u.washington.edu>
Sender: news@mips.COM
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The real difference is: a 386 SX has a 24 bit address path and a 16 bit data
path. This allows it to address 24 MB and plug into existing '286-like'
boards. Its I/O is very similar if not identical to the 286.

The 386 DX of course has a 32 bit address and 32 bit data path. This gives
addressability over 4 GB of memory.

The speed differences between a 386 DX and 386 SX at the same frequency
are all attributable to the multiple memory and I/O bus accesses.

Robert Rodriguez
rr@mips.com
hi-ho, hi-ho, it's off to workstations I go.....