How many versions are there of the Adaptec (Cogent) EM110 TX?

Cogent was bought by Adaptec so there are multiple versions of this card, the EM110 TX and the EM110 TX Combo, which adds a BNC 10B2 connector. Do not confuse this card with the EM110 T4.

The Adaptec part numbers are:

EM110TX-PCI
EM110TX-PCI-C
EM110TX-ISA
EM110TX-ISA-C

The ISA cards probably use the SMC 91C100 chipset, which may work with the smc9194.o driver.