Apologies if this is a common setup problem. I've searched but I suspect that I'm using poor keywords. I've been setting up a trackball and, basically, it works.
My issue is that, using games like Missile Command and Centipede in MAME2003, the game seems to be confused about the position of the cursor or shooter on the screen. For example, Missile Command starts and the cursor is in the lower middle of the screen but I can't get it to track up and left (ie. hitting a wall) without taking it down and right to 'push' it against the screen edge by continuing to spin the trackball. After pushing like this, I seem to have full movement to the upper/left to the lower/right.
Seems like 'calibration' but I can seem to find a calibration menu.
apologies again but a nudge in the correct direction would be greatly appreciated.