$ lsusbBus 001 Device 004: ID 0483:5710 STMicroelectronics Joystick in FS Mode
$cat /dev/input/miceReturns funky text when I move spinner or trackball. Used to identify device # and confirm device works.
$ cd /dev/input$ ls -laOn Centipede I got a mouse0 and a mouse1. Using GRS Spinner and Trackball I see mouse0 only? Strange.Yes they share the same controller board.
Determining Mouse Index
$ cat /dev/input/mouse0
Shows text when I move Spinner or Mouse. So yes the are combined somehow as mouse0.
In this way I guess this is a simpler setup. Don't need to concern myself with device #'s.