There are no working Disc images of System24 games on the net (well I actually I believe Hot Rod is okay, and some mahjong games), which won't work on Sega Super Masters Golf setup.

This game uses an Hitachi FDxxx CPU which is encrypted and game specific, also the chances are the CPU is dead by now, the batteries only last for 4-8 years.

So sorry to say not much luck there, I'd be intrested in buying the motherboard and floppy if he wants to sell it though.