Bridge mode = PCIC, I think
3Com PCMCIA Ethernet Adapter Issues
3CCFE575BT-D Not Detected (Paul Offord)
Date: 1999, Dec 28
From: David Hinds <firstname.lastname@example.org>
Your PCMCIA bridge must be set to "PCIC mode" in your BIOS setup. In
this mode, the bridge will completely ignore CardBus cards.
Go into your BIOS settings and change it to "auto" or "cardbus" mode.
PC Card Controller Mode = CardBus/16-bit fixed the problem by Paul Offord, 1999, Dec 30
to: "Bridge mode = PCIC, I think"