entity sr64_8a is

  port (
       E_N         : in    bit                         ;
       W_N         : in    bit                         ;
       DAT         : inout mux_vector ( 7 downto 0) bus;
       ADR         : in    bit_vector ( 5 downto 0)    ;
       VDD         : in    bit                         ;
       VSS         : in    bit
       );

end sr64_8a;

architecture STRUCTURAL of sr64_8a is

  component sr64_1a
    port (
         E_N         : in  bit                        ;
         W_N         : in  bit                        ;
         D           : in  bit                        ;
         Q           : out mux_bit                 bus;
         A           : in  bit_vector (5 downto 0)    ;
         VDD         : in  bit                        ;
         VSS         : in  bit
         );
  end component;
  
begin

  bit7 : sr64_1a
    port map (
             E_N => E_N     ,
             W_N => W_N     ,
             D   => DAT (7) ,
             Q   => DAT (7) ,
             A   => ADR     ,
             VDD => VDD     ,
             VSS => VSS
             );

  bit6 : sr64_1a
    port map (
             E_N => E_N     ,
             W_N => W_N     ,
             D   => DAT (6) ,
             Q   => DAT (6) ,
             A   => ADR     ,
             VDD => VDD     ,
             VSS => VSS
             );

  bit5 : sr64_1a
    port map (
             E_N => E_N     ,
             W_N => W_N     ,
             D   => DAT (5) ,
             Q   => DAT (5) ,
             A   => ADR     ,
             VDD => VDD     ,
             VSS => VSS
             );

  bit4 : sr64_1a
    port map (
             E_N => E_N     ,
             W_N => W_N     ,
             D   => DAT (4) ,
             Q   => DAT (4) ,
             A   => ADR     ,
             VDD => VDD     ,
             VSS => VSS
             );

  bit3 : sr64_1a
    port map (
             E_N => E_N     ,
             W_N => W_N     ,
             D   => DAT (3) ,
             Q   => DAT (3) ,
             A   => ADR     ,
             VDD => VDD     ,
             VSS => VSS
             );

  bit2 : sr64_1a
    port map (
             E_N => E_N     ,
             W_N => W_N     ,
             D   => DAT (2) ,
             Q   => DAT (2) ,
             A   => ADR     ,
             VDD => VDD     ,
             VSS => VSS
             );

  bit1 : sr64_1a
    port map (
             E_N => E_N     ,
             W_N => W_N     ,
             D   => DAT (1) ,
             Q   => DAT (1) ,
             A   => ADR     ,
             VDD => VDD     ,
             VSS => VSS
             );

  bit0 : sr64_1a
    port map (
             E_N => E_N     ,
             W_N => W_N     ,
             D   => DAT (0) ,
             Q   => DAT (0) ,
             A   => ADR     ,
             VDD => VDD     ,
             VSS => VSS
             );

end ;