XMTINT_0
sc->sc_intmask |= XMTINT_0 | XMTUF;
if (intstatus & XMTINT_0) {
intmask &= ~XMTINT_0;
sc->sc_intmask |= XMTINT_0;
intmask |= XMTINT_0;
sc->sc_intmask |= XMTINT_0 | XMTUF;