FLAG_FN_PRESSED
if (sc->sc_flags & FLAG_FN_PRESSED) {
sc->sc_flags |= FLAG_FN_PRESSED;
sc->sc_flags &= ~FLAG_FN_PRESSED;
if (sc->sc_flags & FLAG_FN_PRESSED) {
sc->sc_flags |= FLAG_FN_PRESSED;
sc->sc_flags &= ~FLAG_FN_PRESSED;