Looks like it's the same one as Muerto's, and the 2 boards I have (one being Donkey King). I'd bet that's a Falcon pinout, not a 3rd type. It seems to be missing a chip on the board on the left though, right above the EPROM with the green sticker. The 2 boards I have that look just like that have some sort of chip the same size as an EPROM, but whatever identification is on them has been ground off.