From: "Douglas Egan" <degan@calcon.net>
> With PNP ISA cards, (which I am using for one interface 3c509) I booted
DOS
> and configured the card for PNP.  I was going to try to hardcode the
address
> and irq in the kernel conf file to see if that makes any difference.

I would recommend using 3c5x9cfg to hardcode the NIC to 300/10 and then tell
the BIOS to reserve IRQ 10 for ISA/legacy.  You should not need to change
the
kernel config, as the 3c509 (& driver) has a builtin method of finding the
cards.
(something like PNP, but 3Com specific IIRC)

-Andrew