PINBALL: Repair Bally 6803 Pinball Games 1985 …
A concept that never really worked well, but that Bally obviously thought was a great idea, was the keypad input. Inside every 6803 game (except Escape from Lost World, Blackwater 100, Truckstop and Atlantis), there was a keypad with the numbers 0 to 9, A to F, and "enter", "keybd/clr", and "game" buttoms.