sc->sc_flags |= SABTTYF_DONTDDB;
sabtty_shutdown(vsc)	void *vsc;{	struct sabtty_softc *sc = vsc;	/* Have to put the chip back into single char mode */	SAB_WRITE(sc, SAB_RFC, SAB_READ(sc, SAB_RFC) & ~SAB_RFC_RFDF);	sabtty_cec_wait(sc);	SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_RRES);	sabtty_cec_wait(sc);}