FLAG_POLLING
sc->sc_flags |= FLAG_POLLING;
sc->sc_flags &= ~FLAG_POLLING;
if ((sc->sc_flags & FLAG_DEBOUNCE) && !(sc->sc_flags & FLAG_POLLING)) {
} else if (sc->sc_console_keyboard && !(sc->sc_flags & FLAG_POLLING)) {
if (sc->sc_flags & FLAG_POLLING) {