Hello Jared!

  JDM> I'd say the card is indeed at port 0x280, but it's
     > using something other than irq 9.

You were absolutely correct, once I was able to get the
network card setup program on the machine I saw that the
card was actually set to use IRQ 10.  I have set this to 9
and can now reach the outside world.  There's still a lot to
do on this machine, but this is a significant step in the
right direction.

Thanks to yourself, Paul, Patrick and Martin for helping me
with this.

Regards,
  - Andy.