Post count: 3

Hey Sorry for the Late reply. What I have discovered and explored is using two USB trackballs ach device is recognized as it’s own input (mouse), registering as /dev/input/js0 and /dev/input/js1 then in your retroarch.cfg you just apply player 1 to js0 and player 2 to js1.

You can also view the devices using lsusb.

I dont really know much about marble madness so I’m not sure whats up with that.