How To: snes9x and Gravis Gamepad Pro
For anyone else using a Gravis Gamepad Pro, here's the settings I've used to map the buttons correctly. These instructions assume that your joystick mount at /dev/js0 ("$ ls /dev/j*" (w/o " " )to find out where your joystick is located.
Add the following to your snes9x player command path inside MythTv:
-joydev1 /dev/js0 -joymap1 2 1 3 0 4 5 9 8