S_INTR_LATCH
if ((status & S_INTR_LATCH) == 0) {
S_INTR_LATCH | S_TX_AVAIL | S_RX_EARLY | S_INT_RQD);
S_INTR_LATCH | S_TX_AVAIL | S_RX_COMPLETE | S_UPD_STATS |