> I am quite certain it is not a Disc Controller Card!
Full ACK!
This strange ground screw, the additional capacitors and the type of label on EPROM makes me guess that its a card for some custom made hardware.
If you are very interested you could check if the EPROM contains firmware and if yes, check out the firmware ID bytes (see http://www.1000bit.it/support/…otes/misc/tn.misc.08.html). This way you could at least clarify if the card is supposed to connect some character device ($Cn05 = $38), some mass storage device ($Cn05 = $20) or - what I guess - something completely different and doesn't care at all about firmware ID bytes.
