PINBALL: Repair Bally 6803 Pinball Games 1985-1989.
I recoded my Stern Stars (1978) by replacing the processor with an Arduino Nano, and created a generic Bally/Stern OS you can use to make new rules for your early SS Bally/Stern
PINBALL: Repairing Bally, Stern Pinball Games 1977-1985, part two
AlltekSystems
PINBALL: Repair Bally 6803 Pinball Games 1985-1989.
MPU SETUP INO - Pinball Electronics from barakandl
MPU327- This board replaces both the MPU board AND the Driver board for ALL Williams System 3, 4, 6 & 7 pinball games MPU327