Finally, I made a footswitch by myself for playing PPSSPP with my Mac. Using self-made keyboard kit and YAMAHA electric piano pedal.
https://www.youtube.com/watch?v=tzbna7TTVcQ
This movie demonstrates PPSSPP play using game controller and footswitch.
Left movie is plaing with PlayStation 3 game controller, right one is PlayStation 3 game controller and my footswitch.
Playing the game with footswitch is more difficult but more fun, I found.
https://www.youtube.com/watch?v=tzbna7TTVcQ
This movie demonstrates PPSSPP play using game controller and footswitch.
Left movie is plaing with PlayStation 3 game controller, right one is PlayStation 3 game controller and my footswitch.
Playing the game with footswitch is more difficult but more fun, I found.