Subject: Re: Pentium + 256k pipelined cache
To: John F. Woods <>
From: Jason Thorpe <>
List: port-i386
Date: 04/26/1996 18:15:51
On Fri, 26 Apr 1996 07:46:47 -0400 
 "John F. Woods" <> wrote:

 > If turning the external cache off makes it work, then it can't be a gcc bug.
 > I don't know of any "known bugs" with Pentium systems and external caches,
 > but it's certainly common enough for 486 system chipsets to mishandle their
 > external caches, typically failing to do bus snooping or not handling the
 > invalidate commands correctly.  You'd think that chipset manufacturers would
 > learn from previous mistakes and not continually reimplement them; you'd
 > apparently be sadly mistaken...

I've actually filed at least on PR re. the cache losing on a Pentium 
system.  Symptoms were basically nasty memory corruption.  It sucked.

Jason R. Thorpe                             
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