Williams System3-System6 Test ROM instructions.
Marvin3m.com

2716 ROM version (system3-6)
2532/2732 ROM version (system7)
Software is the same for both, just formatted differently.
Plugs into the CPU board at IC17.



* Return to the Pin Fix-It Index
* Go to Part One System3-7 Repair Guide
* Go to Part Two System3-7 Repair Guide
* Return to Marvin's Marvelous Mechanical Museum