x64sc -default -controlport1device "36"
Assign SNES-start to some button of an active joystick / gamepad
Press/release that button
The cursor is moving to the right now. Looks as if the button is stuck. Press/release button again, cursor stops. It toggles with every press.
Not sure if this is the proper behavior.
START toggles autofire - and FIRE is the same as pressing SPACE in port 1. So indeed, totally normal :)