>> One is IOASIC assisted, sys/dev/tc/if_le_ioasic.c, another is
>> just a plain TURBOchannel option card which was originally designed for
>> DECstation 5000/200, sys/dev/tc/if_le_tc.  The former is apparently working
>> well, but from what I saw in port-alpha the latter does not work this moment.
>
> Ahh, so the onboard le0 will use a slightly different driver than
> one in a TC slot?

Yes, that's the reason why two different files exist.  I suspect PMAD-A
driver (sometimes?) fails to work with DEC3000 (only for TC SG machines?)

Tohru Nishimura