architecture do_nothing of ROM is begin end architecture do_nothing; entity tb_05_08 is end entity tb_05_08; architecture test of tb_05_08 is signal address : natural := 0; signal data : bit_vector(0 to 7); signal enable : bit := '0'; begin dut : entity work.ROM(do_nothing) port map ( address => address, data => data, enable => enable ); stimulus : process is begin wait for 100 ns; address <= 1000; wait for 10 ns; enable <= '1', '0' after 10 ns; wait for 90 ns; address <= 1004; wait for 10 ns; enable <= '1', '0' after 10 ns; wait for 90 ns; address <= 1008; wait for 10 ns; enable <= '1', '0' after 10 ns; wait for 90 ns; wait; end process stimulus; end architecture test;