Alright, i got the tool to open the stupid cart. The board inside is cracked in half, it looks a lot like the one in paul's picture, but i can't tell if it's the same one or not. It wouldn't really take much to snap a different cart in half.

The chips inside are in fact UV eproms, but since the board was cracked, i can't do much with them. I'm sending them to a friend to dump for me.