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