You mean that nobody wants a current-loop capable
card? Zog!. The other
feature of these cards (if it's the IBM card I think it is) is that it's
one of the few cards that will work in slot 8 of a real IBM PC/XT. It can
assert the right signal to enable the bus buffers on the motherboard.
Actually after some point just about everything started being designed
to be slot-8 compatible. I've got slot-8 compatible VGA cards....
Eric