BCD to 7seg converter in VHDL

BCD to 7 segment converter entity:

library ieee;
use ieee.std_logic_1164.all;

entity to_7seg_converter is
port (
  BCD_IN : in integer range 0 to 9;
  D_OUT : out std_logic_vector(6 downto 0)
);
end entity;

architecture behave of to_7seg_converter is
begin
  D_OUT <= "1000000" when BCD_IN = 0 else
           "1111001" when BCD_IN = 1 else
           "0100100" when BCD_IN = 2 else
           "0110000" when BCD_IN = 3 else
           "0011001" when BCD_IN = 4 else
           "0010010" when BCD_IN = 5 else
           "0000010" when BCD_IN = 6 else
           "1111000" when BCD_IN = 7 else
           "0000000" when BCD_IN = 8 else
           "0010000" when BCD_IN = 9 else
           "1111111";
end architecture;

do file for testing:

restart -f
force BCD_IN 0 0,1 100,2 200,3 300,4 400,5 500,6 600,7 700,8 800,9 900
run 1000

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