Is the Intel EtherExpress PRO/100 supported? It's listed in the xi manpage.
I's found by the xi device driver, but when I try to use it all I get is
a device timeout.

...
xi0 at pcmia0 function 0: Intel EtherExpress PRO/100
xi0: Ethernet address 00:a0:c9:38:7f:fd
ukphy0 at xi0 phy 0: Generic IEEE 802.3u media interface
ukphy0: OUI 0xfcffff, model 0x003f, rev. 15
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
...

Any ideas?