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Dig Dug was an old arcade game released way back in 1982 (this title was sold simultaneously by both Namco and Atari Games). There were two sequels, Dig Dug II (arcade version is impossible to find), and Mr. Driller (who is Dig Dug's son, this title is available in the form of arcade JAMMA boards, or for most newer console systems).

A Dig Dug boardset will plug right into a Galaga cabinet, although you have to switch Galaga's 2-Way joystick for a four way, and run the 2 extra wires for up and down from the wiring harness, but Galaga plays fine with a 4-Way, so this is a nice and easy project to have two classic games in a single cabinet.

Tim Skelly was the first to take the leap, while working for the legendary vector graphics pioneers at Cinematronics. The 27 year-old coder often thumbed his nose at the many clones of Pong and Space Invaders that littered the arcades, and believed that something fresh would be more likely to capture players' attention. This thirst for innovation would lead him to develop Warrior, the first one-on-one fighting game.  Full Biography

ARGH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!+1 . I got all new caps, some slightly larger since the exact size wasn't available, and I figured it'd help with the ripple... well, still same ripple . I've got ~75mV on the 12V line, ~45mV on the -5V line, but almost nothing on the +5V line. Any ideas what else besides caps could cause this? I swapped the rectifier diodes from another because I thought maybe they were old and letting some of the negative voltage through, pulling down the voltage, but that didn't make a difference (unless the other diodes were bad, but I've never heard that being a problem w/ these boards, so I doubt it).