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SubjectRe: PCI code: why need outb (0x01, 0xCFB); ?
On Wed, 8 Jan 2003, Petr Vandrovec wrote:

> > Fortunately that's not true. Grab the relevant docs from:
> > ''. The semantics of
> > 0xcf8, 0xcf9, 0xcfa and 0xcfb I/O ports when used as byte quantities is
> > explained there. Note that 0xcf8 and 0xcfa are the way to get at the PCI
> > config space using conf2 accesses.
> Thanks, page 34 of 290479.pdf is exactly what I was looking for
> (i.e. write 1 to 0xCFB to get PCI conf1, write 0 to get PCI conf2).
> Next time I'll complain immediately instead of spending time with
> browsing Intel website and google.

Well, the docs are sometimes hard to get by. There
are a few EISA and basic peripheral specs nearby, too.

+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+ e-mail:, PGP key available +

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