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SubjectRe: Linux 2.4.2ac12 (vt82c686 info)
On Wed, Mar 07, 2001 at 01:23:49PM +0000, John Heil wrote:

> > Also, the vt82c686 will work just fine with Linux, but will be limited
> > to UDMA33, because UDMA66 on this chip does reliably fail.
> Based on following the lkml threads on Via chipsets, it seems that
> the 686a at or above rev 22, will run UDMA66 just fine.
> Below that, lies the flakiness...
> My Tyan based 686a rev 22 has been trouble free save a bad cable.

686 rev 00-0f => 686, UDMA33 (UDMA66 broken, chip very rare)
686 rev 10-2f => 686a, UDMA66
686 rev 40 => 686b, UDMA100

> I just acquired a new 1.1G athlon on an asus a7v133. It has a 686b.
> What should I expect w the 686b? and is the Via 686b data sheet
> available somewhere?

Make sure you use the latest 2.4.2-acxx drivers. Most other versions of
my drivers have little bugs in the 686b support. Harmless but somewhat

Vojtech Pavlik
SuSE Labs
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