Failure to detect PCI card

[Peter LaDow]

On Mon, Aug 5, 2013 at 4:07 PM, Peter LaDow <petela at gocougs.wsu.edu> wrote:
> However, replacing the 82540 based card with either a 3com 3C905TXM or
> the Netgear FA331, there is no response on the 0x10 IDSEL line.  Thus
> it appears these cards are NOT responding to configuration reads.  I
> think I have to break out the scope and probe around for the 5V/3V.  I
> wouldn't think that the supplies are the issue since these are
> universal cards, and as I understand it either 3V3 _or_ 5V can be
> present, so these should work fine.  Yet they aren't responding to PCI
> configuration cycles.

A few more notes.  I tried a variety of other cards, such as a PCI
modem (WinMode, ack), a WinTV card, and a PCI based 802.11 card.  All
of them enumerate perfectly.

Perhaps it is a BIOS option ROM like you suggested earlier.  The
3c90xC reference manual I found
(http://people.freebsd.org/~wpaul/3Com/3c90xc.pdf) mentions an option
ROM (and there is an Atmel part stuffed).  I can't find any technical
information on the FA331 (yet), so I don't know about it.

But regardless, wouldn't enumeration have to occur before any option
ROM could even be used?

Thanks,
Pete