sc_tda16
tda16 = &sc->sc_tda16[nexttx];
sonic16toh(sc, sc->sc_tda16[olasttx].tda_fragcnt);
sc->sc_tda16[sc->sc_txlast].tda_frags[seg].frag_ptr0 |=
sc->sc_tda16[olasttx].tda_frags[olseg].frag_ptr0 &=
tda16 = &sc->sc_tda16[i];
memset(&sc->sc_tda16[i], 0, sizeof(struct sonic_tda16));