Date: Sat, 19 Sep 1998 08:55:44 -0600 From: Steve Passe <smp@csn.net> To: vanmaren@fast.cs.utah.edu (Kevin Van Maren) Cc: mike@smith.net.au, se@FreeBSD.ORG, smp@FreeBSD.ORG Subject: Re: Multiple PCI busses and the 450NX chipset Message-ID: <199809191455.IAA18435@Ilsa.StevesCafe.com> In-Reply-To: Your message of "Fri, 18 Sep 1998 18:49:34 MDT." <199809190049.SAA03431@fast.cs.utah.edu>
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Hi,
> It is finding the 82454NX PCI Expander Bridges. Are there actually
> any PCI cards in either of the other two busses (32-bit and 64-bit
> PCI bus)?
>
> I have seen this before, with the AMI BIOS, where the BIOS does not
> configure PCI-PCI bridges if there is nothing on the other side
> of the PCI bridge (or nothing but a PCI-PCI bridge, with nothing
> on the other side of that). This (empty PCI busses) would also
> make sense, given that there are no interrupt mappings in the MP
> table for the other PCI busses.
>
> Can you plug in a couple extra cards (at least one in each of the
> other two busses) and try it again? If it still doesn't work,
> I'll be glad to look at it, but my guess is that the multiple
> host-PCI bridges are implemented similarly to the 450GX chipset,
> and AGP in the 440BX, so it will "just work" once the BIOS
> configures the bridges.
FYI, the 450NX chipset docs:
http://developer.intel.com/design/pcisets/datashts/243771.htm
--
Steve Passe | powered by
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