-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc

-- This file is part of VESTs (Vhdl tESTs).

-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version. 

-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-- for more details. 

-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

-- ---------------------------------------------------------------------
--
-- $Id: ch_01_fg_01_08.vhd,v 1.2 2001-10-26 16:29:33 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------

architecture behav of reg4 is
begin

  storage : process is
                      variable stored_d0, stored_d1, stored_d2, stored_d3 : bit;
  begin 
    if en = '1' and clk = '1' then
      stored_d0 := d0;
      stored_d1 := d1;
      stored_d2 := d2;
      stored_d3 := d3;
    end if;
    q0 <= stored_d0 after 5 ns;
    q1 <= stored_d1 after 5 ns;
    q2 <= stored_d2 after 5 ns;
    q3 <= stored_d3 after 5 ns;
    wait on d0, d1, d2, d3, en, clk;
  end process storage;

end architecture behav;