def IXGBE_SRRCTL(index):
    """
    Split and Replication Receive Control Registers
    00-15 : 0x02100 + n*4
    16-64 : 0x01014 + n*0x40
    64-127: 0x0D014 + (n-64)*0x40
    """
    if index <= 15:
        return 0x02100 + index * 4
    if index < 64:
        return 0x01014 + index * 0x40
    return 0x0D014 + (index - 64) * 0x40