I guess it's from a Virtua Striker 4 kit, since it was packet along with some VS4 decals, I got from ebay. Since bot VS4 service manuals I got have no wiring diagram, I have no clue what this might be. Something for the card reader option perhaps?
Thanks for the answer. I'll check out this website - didn't know it so far.
So this connects to the naomi filter board? What's it for? Analog controls? Judging from the wires that came with it, I guess I have to use the wires coded 600-7324-01UK and 600-7187-3000UK for this?
I think it does have to do with the card readers. I think this is how you connect 2 readers to the same system. I think I have one so I'll have to compare the part numbers. I'll check and post it here later.
This is a serial lead from the Tri-force to this small PCB, then it has the regular VMU/Maple I/O wiring (that you get with Naomi), this then goes to Card Reader A and B.