joystick_port_0_autofire
The option documentation is properly formatted yet
Default: 0 Example: 1 Since: 2.1.0
Set to enable to enable autofire for this joystick port.
Enabling autofire for a joystick port means that the ordinary fire button will give the effect of many rapid-fire short presses. If you need to generate a combination of long and rapid-fire presses of the fire button, then instead of enabling this setting, you can instead configure a different keystroke or controller button to map to ‘action_joy_0_autofire_button’.
See also [joystick_port_0].
Source: https://github.com/FrodeSolheim/fs-uae/blob/master/docs/options/joystick_port_0_autofire