AFAIK, Cyrixes and IBM 686(MX)'s are exactly the same chip down to the
masks used for the lythographic process. The only difference being the
packaging. This is mostly confirmed by the fact that equivalent
model/stepping chips share the same bugs (ie. comma bug). IBM's also
report "CyrixInstead" as their cpu vendor id.
Cheers,
-Rafael
On Thu, 1 Jul 1999, Woodhouse Ian wrote:
> On the subject of Cyrix Pxxx+ CPUs and bugs, I note that there are
> twins running around bearing the IBM name rather than Cyrix.
> Rumour suggests that these are more reliable that the Cyrix editions.
>
> I find this odd since I believe many Cyrix's were made at IBM plants.
>
> Does anyone else's experience demonstrate this?
>
>
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