OVERRUN
if (int_stat & OVERRUN)
AC_WRITE(ac, INT_MAP, ac->int_mask | OVERRUN);
AC_WRITE(ac, INT_ENABLE, ac->int_mask | OVERRUN);
if (rx_status & (ABORT|OVERRUN|TOOLONG|RUNT|RXISERR|CRCERR|FAERR)) {
if (rx_status & OVERRUN)
status0 = ahd_inb(ahd, SSTAT0) & (IOERR|OVERRUN|SELDI|SELDO);
status0 &= simode0 & (IOERR|OVERRUN|SELDI|SELDO);
} else if ((status0 & OVERRUN) != 0) {