TCO_RLD
outw(0x01, TCO_RLD(p));
outb(0x01, TCO_RLD(p));
outw(0x01, TCO_RLD(p));
outb(0x01, TCO_RLD(p));
val16 = inw(TCO_RLD(p));
val8 = inb(TCO_RLD(p));
outb(0x01, TCO_RLD(tcobase));