IRQ_SLAVE
outb(IO_ICU1+1, 1 << IRQ_SLAVE); /* slave on line 2 */
outb(IO_ICU2+1, IRQ_SLAVE);
irqs |= 1 << IRQ_SLAVE;
movb $(0x60|IRQ_SLAVE),%al /* specific EOI for IRQ2 */ ;\
movb $(0x60|IRQ_SLAVE),%al /* specific EOI for IRQ2 */ ;\
movb $(0x60|IRQ_SLAVE),%al /* specific EOI for IRQ2 */ ;\
outb(IO_ICU1+1, 1 << IRQ_SLAVE); /* slave on line 2 */
outb(IO_ICU2+1, IRQ_SLAVE);
irqs |= 1 << IRQ_SLAVE;
imen = ~((1 << IRQ_SLAVE) | (1 << ia->ia_irq));