I have been trying to get my 2 1/4" trackball that plugs into the PS/2 mouse port on my computer to respond to MAME, but I've had no luck. Specifically, I was trying to get it to respond in Centipede so I would be able to move the character around by using my trackball.
This is the text written within the controls.ini file I am using with MAME.
[centiped]
gamename=Centipede (revision 3)
numPlayers=2
alternating=1
mirrored=1
tilt=1
cocktail=1
usesService=0
miscDetails=
P1NumButtons=1
P1Controls=Trackball+trackball
P1_BUTTON1=Fire
P1_TRACKBALL_X=Left
P1_TRACKBALL_X_EXT=Right
P1_TRACKBALL_Y=Up
P1_TRACKBALL_Y_EXT=Down
Maybe changing the P1_TRACKBALL to a mouse command would fix the problem, but I'm quite clueless on how to properly write it out.
Any help is welcome.