LPT_PRIME
sc->sc_flags = LPT_PRIME;
if ((lpt->sc_flags & LPT_PRIME) && !LPTCTL(dev_id)) {
sc->sc_flags = fl & (LPT_PRIME|LPT_AUTOLF);
flags |= LPT_PRIME;
flags &= ~LPT_PRIME;
printf("prime=%s ", (flags & LPT_PRIME) ? "yes" : "no");