I'm using a 3Com 3C3FEM556C combination 10/100 Ethernet+Modem card. The
card is detected OK, but when the boot sequence gets to 'Setting tty
flags' it drops to DDB with a uvm_fault:

uvm_fault(0xc02b1060, 0xc7739000, 0, 1) -> 1
kernel: page fault trap, code=0
Stopped in ttyflags at pcmcia_ccr_read+0x1e: movb 0(%edx, %eax,1), %al

I have a Ricoh 5C478 PCI-CardBus bridge. (although this card is not a
CardBus card)

What could be the problem? (this happens with the GENERIC_LAPTOP kernel as
well, I'm using my own custom kernel.)