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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.

wiretap.spies.com

The screen shows a repetitive pattern of (correct) ice-cube graphics, which will change if the DIP-switch setting is altered or the joystick is pushed. The sound amp seems to be ok, as the pot produces some noise when turned. The CPU seems to be ok, as the board reacts to switch settings.

The screen shows a repetitive pattern of (correct) ice-cube graphics, which will change if the DIP-switch setting is altered or the joystick is pushed. The sound amp seems to be ok, as the pot produces some noise when turned. The CPU seems to be ok, as the board reacts to switch settings. My guess is, that at least one of the EPROMS is partially unreadable, or (worse) some video logic ist broken. It would be nice if someone could dump the EPROMS of his board and send the binaries to me or/and give some other repair hints.