I've got a 2-player Demolition Derby. It plays fine, but with one issue. Player 2's car is blue (same as the "computer"), as opposed to red. The machine is not missing the color red...all player 2 text is red, the title/splash screen has red, etc. This is a MCR three board stack, not the mono-board. I ran the ROMs through Romident. Four ROMs on the CPU board came up as unknown. The locations are 1C, 2C, 3C, and 4C...and the Bally labels are Pro1, pro2, pro3, and pro4. Looking through the MAME-Maws info, nothing matches this configuration. My CPU board isn't the "normal" MCR III CPU that I've seen before....It's a bit smaller than the MCR III CPU a la Spy Hunter. Plus, this board isn't labeled MCR III CPU....it's stamped 5MHz CPU. It does seem to match the PDF manual online----not that I can actually read that. My Video Gen. board doesn't match the manual. Mine is the standard MCR III video gen board (a la Spy Hunter). All other ROMs checksummed to the four player board set.
So, any ideas? Could this be a factory screw up they let out the door...or am I looking for a needle in a haystack. Thanks!
Edward
So, any ideas? Could this be a factory screw up they let out the door...or am I looking for a needle in a haystack. Thanks!
Edward

