@voljega
For now you can have any button you like to quit, but not a combination such as Start+Select.
Just add this line in the uae config file. It also depends on your controller, xbox360, Sony... You will need to establish what button number your input device (joypad) has for the button you which to assign to quit.
For exemple with the PlayStation 3 joypad, (16) correspond to the PS button.
With the xbox360, (8) correspond to the back button.
button_for_quit=16
