sc->sc_imr1 &= ~SAB_IMR1_ALLS; SAB_WRITE(sc, SAB_IMR1, sc->sc_imr1);
sabttystop(tp, flags)	struct tty *tp;	int flags;{	struct sab_softc *bc = sab_cd.cd_devs[SAB_CARD(tp->t_dev)];	struct sabtty_softc *sc = bc->sc_child[SAB_PORT(tp->t_dev)];	int s;	s = spltty();	if (tp->t_state & TS_BUSY) {		if ((tp->t_state & TS_TTSTOP) == 0)			tp->t_state |= TS_FLUSH;		sc->sc_flags |= SABTTYF_STOP;	}	splx(s);	return (0);}