library ieee;
use ieee.std_logic_1164.all;

entity concept4 is
    port(con : in std_logic;
         clk : in std_logic;
         data_in1, data_in2 : in  std_logic;
         data_out : out std_logic);
end concept4;

architecture JMJS_Logic of concept4 is
begin
    process(con, data_in1, clk)
    begin
        if (con =  '1') then
	    data_out <= data_in1;
	elsif (clk'event and clk='1') then
	    data_out <= data_in2;
        end if;
    end process;
end JMJS_Logic;