Hi Jerry,

   Due to its unified L1 cache and "Pentium like" core, the Cyrix CPU used on the Gainbery upgrade was short lived...

   Cyrix never intended for this CPU to be used as an upgrade. The unified cache not only gave even the latest (at the time) BIOS fits, but alot of chipsets used on 486 MBs just couldn't support it. Some MBs wouldn't work with it no matter what you did to them...

   The root of the problem seems to come from the write-back cache the processor core was setup to use. Write-through cache-ing was not a true option. So a MB that supported write-back cache and whos BIOS/chipset could utilize unified L1 cache (not that many) were the only ones that really worked!

   Some time later PowerLeap came out with a virtual write-back driver as part of its Control Panel for its PL-586 Upgrade. I've often wondered if it would work with this CPU.

   http://www.powerleap.com/Products/ccp.htm

   Hope this helps...
   Max

>I am building a juno e-mail computer and have a Gainbery 96gbcm002 processor to put in it.  I am looking for any docs on it.  I know it is based on a cyrix M1 586.  The only way I can get to run is disable all the internal and external mem. cache...
>   Jerry

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10115 Mountain Flower Ct
Charlotte NC 28214-7638



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