PIC_ELCR2
old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
outb(new >> 8, PIC_ELCR2);
v = inb(PIC_ELCR2) << 8 | inb(PIC_ELCR1);
outb(trigger[1], PIC_ELCR2);
trigger[1] = inb(PIC_ELCR2) & 0xDE;