Path: utzoo!utgpu!watmath!clyde!att!rutgers!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!sm.unisys.com!ism780c!logico!gary
From: gary@logico.UUCP (Gary Vrooman)
Newsgroups: comp.sys.ibm.pc
Subject: RE: 386SX for PC/AT
Keywords: 386SX, PC/AT
Message-ID: <1032@logico.UUCP>
Date: 19 Dec 88 20:07:49 GMT
Reply-To: gary@logico.UUCP (Gary Vrooman)
Organization: Logicon, O.S.D, Woodland Hills, CA
Lines: 13

In an earlier posting, I suggested that the ideal CPU add-in card for
PC/AT owners would be a 16MHZ 386SX with an Intel 82385 cache controller
and 32K of static Ram.
The reason for this configuration would be to maximize performance without
sending cost through the roof.
The key idea is that this tiny add-in card would not contain any
system memory - you could continue to use the slow (150 nanosecond) DRAMs
sitting on the 16 bit AT expansion bus.
If the cache controller can maintain a cache hit rate of 90-95%, then the
16 MHZ 386SX should provide roughly double the performance of an 8 MHZ AT.
This configuration is the ideal situation for an AT like mine which has
3.5 Megabytes of slow DRAMs installed - I don't want to have to replace 
this RAM at today's prices.