LPT_POLLED
sc->sc_lpt.sc_flags |= LPT_POLLED;
sc->sc_flags = (sc->sc_flags & LPT_POLLED) | flags;
if ((sc->sc_flags & (LPT_POLLED|LPT_NOINTR)) == LPT_POLLED)
sc->sc_flags |= LPT_POLLED;