I got a set (two cards) of this but I am unable to find a manual.
Not even the jumpers map...
Found the W3.1/W9x drivers only.
Wrote to the company which still exists but haven't got a response yet. This card is 1992 vintage so I don't expect very much...
Didn't have the time yet to test it empirically and I prefer to read the documentation before trying anything, as a safe rule. I avoided this way many headaches in the past.

So. if anyone has a manual or something concerning these rare/obscure cards, I would be very grateful if he'd contact me.