All new code for a 1980 Classic.

Links to example projects for ALB.

Adding speaker and under-cab lights to The Getaway.

Discussion of the ALB sections and what does what.

Parts list to build the Accessory Lamp Board (ALB).

New rules for Stern’s Galaxy.

New rules for Williams Black Knight (1980)

Installing an RPU (Rev 4 or 102) board onto an MPU (Bally/Stern/Williams).

It’s the cable.

Instructions on how to source parts and solder them together to make your own RPU board for cheap.

A list of all the reasons you might not be getting sounds, and the ways you can fix those issues.

The 6820 PIA (Peripheral Interface Adapter) chips are how the M6800 talks to the outside world.

The Stern MPU-100 is identical to the Bally AS-2518-17 board. At least I think it is. I’ve worked on both…

Storm 23 - all new code that can run on Stern Lightning (1981)

The new RPU OS library can handle many different MPU architectures.

Installing new code on your machine is relatively cheap & easy. There are plug-and-play and DIY approaches available. You can write your own software too if there’s no new code available for your machine.

Rewrite of Supersonic (Bally 1979) with all new rules, sounds, and modes.

This is a fast, widebody, 4-flipper shooter from Stern (1980). The theme features big game animals (tigers, lions, etc.) and has 9 …

This project began with a need to fix an old Stern Stars. Once it was playable, the real work began.