When I first designed the P-ROC, I had a JD and used it as a dev platform for custom custom software. The result was a new, custom ruleset for JD, deeper than the original rules and functionality complete, including a 4-stage wizard mode (alternately enabled via the supergame button).

After getting some volunteer help with voice calls, music, and DMD artwork and animations, the game turned out pretty well, though it could admittedly stand some more work on dots.

We demo'd this custom JD code at Chicago Expo in 2010, letting people play it throughout the weekend.

Unfortunately, I sold the JD and moved on to bigger and better things (Multimorphic and the P3!!!), but the code is free and open-source, and anybody can install a P-ROC and play the code on their machines.

Wiki page: http://www.pinballcontrollers.com/wiki/JD_rules
Source code: https://github.com/preble/JD-pyprocgame
Discussion forums: http://www.pinballcontrollers.com/forum/index.php?board=12.0
How to buy a P-ROC: http://www.pinballcontrollers.com

If anybody wants to revive and take ownership of this project, PM me. Since the code is all written in python, you don't need to be a low level software expert.

- Gerry
http://www.multimorphic.com

FYI - If you decide to install a P-ROC and this custom code, you do *not* lose the ability to play the original rules. Any machine with a P-ROC can still play original game rules through pinmame. We've added the hooks to pinmame so it can drive a real machine through a P-ROC.

There's a whole forum section dedicated to this: http://www.pinballcontrollers.com/forum/index.php?board=13.0

That's what I used when developing the software... switching back and forth with a software command. Since then, some of our customers have developed 'launcher' software that can switch back and forth between original and custom code via button combos.

- Gerry
http://www.multimorphic.com