entity ap_a_05 is end entity ap_a_05; library ieee; use ieee.std_logic_1164.all; architecture test of ap_a_05 is signal a, b, y, x : std_ulogic; begin -- code from book y <= a when x = '1' else b; -- end code from book x <= '0', '1' after 20 ns; a <= '0', '1' after 10 ns, '0' after 20 ns, '1' after 30 ns; b <= '0', '1' after 15 ns, '0' after 25 ns, '1' after 35 ns; end architecture test; <div align="center"><br /><script type="text/javascript"><!-- google_ad_client = "pub-7293844627074885"; //468x60, Created at 07. 11. 25 google_ad_slot = "8619794253"; google_ad_width = 468; google_ad_height = 60; //--></script> <script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script><br /> </div>