Mystery card?

[commodorejohn@gmail.com]

I have a question about an Apple expansion card. It came with my IIGS,
which I got at a garage sale with no documentation, and it has a card
in it that I really have no idea what it might be. At first glance, it
seems like a SCSI controller - it's a long expansion card with a DB25
connector. But part of the cable running to the connector splits off
to a second board, which doesn't go in an expansion slot, but plugs
into the game port instead. The second board has two RCA-type
connectors on it, and an Ethernet-type connector. Does anyone have any
idea what in the world this thing is? I sure don't.

Pictures, left large for easy identification!
The main board: http://img140.imageshack.us/img140/3576/boardlb9.jpg
The second board: http://img140.imageshack.us/img140/7340/daughterboardga7.jpg
A picture of the way the two connect, and the game port plug:
http://img140.imageshack.us/img140/8383/connectiondu3.jpg
The DB25 connector, nothing special: http://img114.imageshack.us/img114/5514/boardconnectorpq8.jpg
The crazy connectors on the second board:
http://img114.imageshack.us/img114/6047/daughterconnectorssp0.jpg

If anybody knows what this is, I'd love to hear about it!