-- eb1 1
macaddr_byte_reversed <=
  macaddress_i(7 downto 0) &
  macaddress_i(15 downto 8) &
  macaddress_i(23 downto 16) &
  macaddress_i(31 downto 24) &
  macaddress_i(39 downto 32) &
  macaddress_i(47 downto 40);