> personally I think MAME should have some kind of dedicated "2nd Keyboard" mode for > this kind of case, where one KB is internal MAME stuff and the other is the emulated > system.
Perhaps this could be solved by allowing the UI to map the buttons of USB MIDI keyboards (such as those inexpensive ones with big square buttons, in certain online Chinese stores).
That would also make it possible to, for example, easily control a cassette tape without having to change between keyboards.