SABTTYF_STOP
(sc->sc_flags & SABTTYF_STOP) == 0) {
if ((sc->sc_txc == 0) || (sc->sc_flags & SABTTYF_STOP)) {
(sc->sc_flags & SABTTYF_STOP))) {
sc->sc_flags &= ~SABTTYF_STOP;
sc->sc_flags |= SABTTYF_STOP;