Information for the following ROM(s): antiairc
Anti-Aircraft © 1975 Atari.
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|Released in June 1975.|
There is an undocumented option available that switches the planes into UFO's. Pin 14 of the 003127 IC -- a PROM located at grid location K1 -- is tied to ground, but also has a pullup resistor. Cutting the ground trace causes address bit A4 to be pulled high, selecting the UFO data. A jumper can be installed to easily switch back and forth between planes and UFO's.
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