Okay, so over the weekend I was playing around with the wiring configuration for the four consoles. (project pictures are updated) I plan on connecting all four consoles to the same two controller ports. Since only one console will be running at a time, the 3 that are idle will be held in "reset" mode by the control hardware (either an Arduino or the PC used for the video overlay will be controlling the reset states-- at this point, I plan on having the PC dedicated to the video overlay and also outputting video to a small touch-screen that will be mounted on the control panel... also used for game selection if desired).

I am designing a simple circuit that will isolate the signals from the different machines and only allow the signals from the correct machines to accept input. I may also use an Arduino board as a multitap/joystick input processor if all goes well and I can correct some of the current timing issues.

I plan on adding support for memory monitoring for various SNES games. In this way, I can store a database of high scores, fastest times, or even cause increases/decreases in time and/or player lives due to coin inserts.

Keep in mind, I will be releasing all of my work for others to play around with eventually. I suspect there will be others in the community helping with various pieces once I clarify my plans for the project.