PIC_MASTER_CONTROL
out8(PIC_NON_SPECIFIC_EOI, PIC_MASTER_CONTROL);
#define PIC_MASTER_INIT1 PIC_MASTER_CONTROL
out8(PIC_CONTROL3 | PIC_CONTROL3_READ_ISR, PIC_MASTER_CONTROL);
int32 isr = in8(PIC_MASTER_CONTROL);
out8(PIC_CONTROL3 | PIC_CONTROL3_READ_IRR, PIC_MASTER_CONTROL);