?? store.vhd
字號:
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_ARITH.ALL;
USE ieee.std_logic_unsigned.all;
ENTITY store IS
PORT(
ass :IN STD_LOGIC_vector(5 DOWNTO 0);
d7,d6,d5,d4,d3,d2,d1,d0 :OUT STD_LOGIC
);
END store;
ARCHITECTURE c OF store IS
SIGNAL N :STD_LOGIC_vector(7 DOWNTO 0);
BEGIN
PROCESS(ass)
begin
CASE ass IS
WHEN "000000"=>N<="01111111";
WHEN "000001"=>N<="10001100";
WHEN "000010"=>N<="10011000";
WHEN "000011"=>N<="10100100";
WHEN "000100"=>N<="10110000";
WHEN "000101"=>N<="10111011";
WHEN "000110"=>N<="11000110";
WHEN "000111"=>N<="11010000";
WHEN "001000"=>N<="11011010";
WHEN "001001"=>N<="11100010";
WHEN "001010"=>N<="11101001";
WHEN "001011"=>N<="11110000";
WHEN "001100"=>N<="11110101";
WHEN "001101"=>N<="11111001";
WHEN "001110"=>N<="11111101";
WHEN "001111"=>N<="11111110";
WHEN "010001"=>N<="11111111";
WHEN "010010"=>N<="11111101";
WHEN "010011"=>N<="11111001";
WHEN "010100"=>N<="11110101";
WHEN "010101"=>N<="11110000";
WHEN "010110"=>N<="11101001";
WHEN "010111"=>N<="11100010";
WHEN "011000"=>N<="11011010";
WHEN "011001"=>N<="11010000";
WHEN "011010"=>N<="11000110";
WHEN "011011"=>N<="10111011";
WHEN "011100"=>N<="10110000";
WHEN "011101"=>N<="10100100";
WHEN "011110"=>N<="10011000";
WHEN "011111"=>N<="10001100";
WHEN "100000"=>N<="10001100";
WHEN "100001"=>N<="01111111";
WHEN "100010"=>N<="01110010";
WHEN "100011"=>N<="01100110";
WHEN "100100"=>N<="01011010";
WHEN "100101"=>N<="01001110";
WHEN "100110"=>N<="01000011";
WHEN "100111"=>N<="00111000";
WHEN "101000"=>N<="00101110";
WHEN "101001"=>N<="00100100";
WHEN "101010"=>N<="00011100";
WHEN "101011"=>N<="00010101";
WHEN "101100"=>N<="00001110";
WHEN "101101"=>N<="00001001";
WHEN "101110"=>N<="00000101";
WHEN "101111"=>N<="00000001";
WHEN "110000"=>N<="00000000";
WHEN "110001"=>N<="00000000";
WHEN "110010"=>N<="00000000";
WHEN "110011"=>N<="00000001";
WHEN "110100"=>N<="00000101";
WHEN "110101"=>N<="00001110";
WHEN "110110"=>N<="00010101";
WHEN "110111"=>N<="00011100";
WHEN "111000"=>N<="00100100";
WHEN "111001"=>N<="00101110";
WHEN "111010"=>N<="00111000";
WHEN "111011"=>N<="01000011";
WHEN "111100"=>N<="01001110";
WHEN "111101"=>N<="01011010";
WHEN "111110"=>N<="01100110";
when others=>N<="01110010";
end case;
end process;
d7<=N(7);
d6<=N(6);
d5<=N(5);
d4<=N(4);
d3<=N(3);
d2<=N(2);
d1<=N(1);
d0<=N(0);
end c;
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