left you a reply on klov, but here it is again
could have to do with the size of the rom chip and the jumpers. later games use a 512 k rom, i think that board is set up for that. earlier games use a 256k rom, and need to be set for that. check the docs that came with the board for info, or call rottendog and they will tell you the proper jumpers. also make sure the roms are in the proper sockets.
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