Nuova Bell Pinball Repair information Bell Cobra pinball
6802 MPU
Solenoid Driver | Carolina Pinball Repair
RD-MPU9211 Rottendog Williams System 11-11C MPU Board
Bally 6803 MPU - Pinball Electronics from barakandl
AS-2518-54 BPS054 - Voltage rectifier board
AlltekSystems
Jeff's Pinball Pages
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