Description
Analog joystick sometime don't center properly so a dead area can be made where no movement will be detected.
Alternative Command
-joy_deadzone
-jdz
Example
mame <gamename> -joystick_deadzone 0.5
Command Format
<gamename> -joystick_deadzone <value>. The value is a decimal between 0.0 and 1.0 where 1.0 is the full movement of the joystick. The example will set the deadzone to 50% of the joystick's movement.
MAME's Default Setting
0.3