TPSTART
sc->flags = TPSTART; /* tape is rewound */
if (sc->flags & TPSTART) {
sc->flags &= ~TPSTART;
sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER;
sc->flags |= TPSTART | TPREW;
sc->flags |= TPSTART | TPREW;