library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;

entity top is
	port(
		clock : in std_logic;
		addr : in std_logic_vector(1 downto 0);
		data : out std_logic_vector(2 downto 0)
	);
end entity;

architecture arch of top is

	type rom_t is array(0 to 15) of std_logic_vector(3 downto 0);
	constant rom : rom_t := (
		"0001",
		"0010",
		"0100",
		"1000",
		"0001",
		"0010",
		"0100",
		"1000",
		"0001",
		"0010",
		"0100",
		"1000",
		"0001",
		"0010",
		"0100",
		"1000"
	);
begin
	process (clock)
	begin
		if rising_edge(clock) then
			data <= rom(to_integer(unsigned(addr)))(2 downto 0);
		end if;
	end process;
end architecture;