Yep, it's a PCI failure
PCMCIA Installation and Configuration Issues
Wavelen(Lucent) PCI-PCMCIA adapter problems
Unknown interrupt router
Re: Unknown interrupt router
That is not a good sign
2000, Jul 31
David, your assumption was correct. There's no sign of the Lucent bridge in /proc/pci or lspci. I'll take it to the PCI guy.
Many thanks for your help.