maple_set_callback
void maple_set_callback(device_t, struct maple_unit *, int,
maple_set_callback(parent, sc->sc_unit, MAPLE_FN_KEYBOARD,
maple_set_callback(parent, sc->sc_unit, MAPLE_FN_LCD,
maple_set_callback(parent, sc->sc_unit, MAPLE_FN_MEMCARD,
maple_set_callback(parent, sc->sc_unit, MAPLE_FN_MOUSE, mms_intr, sc);