As far as I can see in the Config menu (Tab) in MAME, the mouse is listed as a number of different controllers (X axis Paddle, X axis Dial, etc).
The question is how would you force the config file to save the Dial settings as Mouse only, as I don't want the Joystick spinning the dial for me.
If I try to mod the settings for Dial I get the option to enter the corrected key/movement, but the mouse or spinner have no effect here. What am I missing?