At least it isn't a game port device. I wrote an x-windows driver to use my game port joystick as a mouse over 10 years ago. It worked ok, but I never did get comfortable using it for mousing vs. flying... :-) Anyway, the biggest issues for the driver was the code for debounce control, edge detection, and acceleration. It was one of those "fun" projects, just to know I could do it, and to get more comfortable with low-level x-lib programming.