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
AlltekSystems
Bally -35 led stuck on - Pinball Technical and Repair Questions - Aussie Arcade
65C02 MPU
PINBALL: Repair Bally 6803 Pinball Games 1985-1989.
PBL-600-0442-00 MC6808P 40-Pin MPU Chip
AlltekSystems
6502A MPU
RD-MPU9211 Rottendog Williams System 11-11C MPU Board
Jeff's Pinball Pages
5400-10320-00 - 68B09E MPU 2 Mhz - 40 pin DIP
PINBALL: Repair Bally 6803 Pinball Games 1985-1989.
11712 Jefferson Ave, Suite C - #446 Newport News, VA 23606 E-mail: mpusupport@allteksystems.com Website: www.allteksystems.com O
AS-2518-54 BPS054 - Voltage rectifier board
MA-09-011-052 - LED flicker eliminator kit Bally aux lamp board AS-2518-52
PINBALL: Repairing Bally, Stern Pinball Games 1977-1985, part two
Nuova Bell Pinball Repair information Bell Cobra pinball
6802 MPU
PINBALL: Repairing Bally, Stern Pinball Games 1977-1985, part two