WheelOfJoy is an Open Hardware 8-player joystick adapter for the Commodore 16 and Plus/4.

The original intent was to figure out how Solder's 3-joystick Adapter worked. It was pretty easy once I realized that the User Port has an output latch, but that also meant that even these 3 extra ports would suffer from the "bouncing ground" effect which prevents using powered controllers.

So I began thinking how to replicate the adapter while avoiding that and suddenly I realized that a very simple solution could be used and that it could easily be extended to support 8 joystick while retaining compatibility with the original adapter.

For more information please visit the GitHub Project Page.