> When my machine boots, I see:
 > 
 > 	"Cyclades Cyclom-Z" rev 0x01 at pci1 dev 9 function 0 not configured
 > 
 > So the OS/driver does see the card.

You have that backwards.  The OS does see the card, thus the message.
The "not configured" part means the OS is not configured with a driver
that supports that card.   Not surprising as that support is not
compiled into the GENERIC kernel.

You'll have to create a custom kernel that doesn't comment out
this line (from i386 generic -- I assume you're running an i386
box: you didn't say).

#cz*	at pci?				# Cyclades-Z multi-port serial boards

// marc