LIBRARY ieee;
USE ieee.std_logic_1164.all;

ENTITY sseg IS
PORT (bcd: IN STD_LOGIC_VECTOR(3 DOWNTO 0);
   neg: IN STD_LOGIC;
   ledss: OUT STD_LOGIC_VECTOR(1 to 7);
   leds: OUT STD_LOGIC_VECTOR(1 to 7));
END sseg;

ARCHITECTURE Behavior OF sseg IS
BEGIN
PROCESS (bcd)
BEGIN
CASE bcd IS          --abcdefg
   WHEN "0000" => leds <="1111110";
   WHEN "0001" => leds <="0110000";
   WHEN "0010" => leds <="1101101";
   WHEN "0011" => leds <="1111001";
   WHEN "0100" => leds <="0110011";
   WHEN "0101" => leds <="1011011";
   WHEN "0110" => leds <="1011111";
   WHEN "0111" => leds <="1110000";
   WHEN "1000" => leds <="1111111";
   WHEN "1001" => leds <="1110011";

   WHEN "1010" => leds <="1110111";
   WHEN "1011" => leds <="0011111";
   WHEN "1100" => leds <="1001110";
   WHEN "1101" => leds <="0111101";
   WHEN "1110" => leds <="1001111";
   WHEN "1111" => leds <="1000111";
   WHEN others => leds <="0000000";
END CASE;
END PROCESS;

ledss <= "0000001" when neg = '1' else "0000000";
END Behavior;

Problem 4 (15 points). Consider the following Boolean functions: F...