MIER
iowrite16(MSK_INT, ioaddr + MIER);
iowrite16(INT_MASK, ioaddr + MIER);
ioread16(ioaddr + MIER),
iowrite16(MSK_INT, ioaddr + MIER); /* Mask Off Interrupt */
iowrite16(ioread16(ioaddr + MIER) | RX_INTS | TX_INTS,
ioaddr + MIER);
misr = ioread16(ioaddr + MIER);
iowrite16(MSK_INT, ioaddr + MIER);
iowrite16(misr, ioaddr + MIER);
iowrite16(misr, ioaddr + MIER);