Hi all,
I've just bought an st-v board with a plugged daughter-board labeled "sega 1996 video bd for st-v".
I cannot find any information about this board around the internet (even on system16 site), so I hope someone here could help me.
The board fits all of the four expansion connectors and it has on the left side (between CN3 and CN5 connectors) 2 s-vhs plugs and 3 RCA yellow plugs. (If it helps I can send a picture)
What this daughter-board is supposed to do? Does exists a service manual around?

Thank you in advance