Thank you for replying, I knew because when configuring keys on FBA we press the hw keys on N900 and as I remember my sixaxis keys were q w e a s d space and enter, I could see them when sixaxis connected and using Notes app, but usb joystick is not related to any key while connected, maybe someone could look to the FBA source code to try to add joystick support because Mame supports I think and they look similar (some roms both support) except FBA is much better and faster. Will upload a video soon.