Re: [ot] VIA southbridge strangeness (was: sis96x compiled in by error: delay of one minute at boot)

["Jean Delvare" <khali@linux-fr.org>]

Hi Jan,

On 2006-03-15, Jan Engelhardt wrote:
> > > I have this lspci:
> > > (...)
> > > 0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
> > > (...)
> > > 0000:00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge
> >
> > Off-topic, but it's quite strange. Your south bridge cannot be a
> > VT8237R and a VT8235 at the same time...
>
> Where does it say that the southbridge is 35 and 37 at the same time?
> (The only thing that's different between the two lspci lines is the
> vtABCD number...)

"The only thing that's different is the thing you said was different."
:)

It looked strange to me because I have two systems with a VT8237R and on
both, lspci says "VT8237" for both the PCI and the ISA bridges. So the
result provided by Etienne suggests that a different (supposedly
earlier) version of the VT8237R has a different ISA bridge sub-device
embedded.

Not that it really matters, anyway, so I probably shouldn't have
commented on it in the first place.

> Or it looks like there's another of these "strange" cases:
>
> 0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo
> MVP3/Pro133x AGP]
> 0000:00:07.0 ISA bridge: VIA Technologies, Inc. VT82C596 ISA [Mobile South]
> (rev 23)

There are many of these, indeed. South bridges include several
sub-devices, and it is very frequent that chip manufacturers do not
upgrade all these sub-devices when they release a new version of their
chip.

My original comment was really related to the specific case of the
VT8237R, not general.

Thanks,
--
Jean Delvare