PIC_SLAVE_TRIGGER_MODE
value = in8(PIC_SLAVE_TRIGGER_MODE);
out8(value, PIC_SLAVE_TRIGGER_MODE);
| (in8(PIC_SLAVE_TRIGGER_MODE) << 8);
out8(0xde, PIC_SLAVE_TRIGGER_MODE);
| (in8(PIC_SLAVE_TRIGGER_MODE) << 8);