/* Single CIA access = 1 E-clock */
void ata_WaitNano(ULONG ns, struct ataBase *base)
{
    ns /= 2;
    while (ns >= 65536 * 4) {
        busywait(65535);
        ns -= 65536 * 4;
    }
    if (ns >= 4)
        busywait(ns / 4);
}