joystick_port_0
The option documentation is properly formatted yet
Example: mouse
The host device mapped to Amiga joystick port 0. If not specified, a suitable device is automatically chosen depending on [joystick_port_0_mode] (usually a mouse). Valid values:
- mouse
- keyboard
- name of connected game pad or joystick
- nothing
See also [joystick_port_0_mode], [joystick_port_0_autofire].
Source: https://github.com/FrodeSolheim/fs-uae/blob/master/docs/options/joystick_port_0