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-- 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_11_fg_11_04.vhd,v 1.2 2001-10-26 16:29:35 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
-- not in book
entity misc_logic is
end entity misc_logic;
-- end not in book
use work.MVL4.all;
architecture gate_level of misc_logic is
signal src1, src1_enable : MVL4_ulogic;
signal src2, src2_enable : MVL4_ulogic;
signal selected_val : MVL4_logic;
-- . . .
begin
src1_buffer : entity work.tri_state_buffer(behavioral)
port map ( a => src1, enable => src1_enable, y => selected_val );
src2_buffer : entity work.tri_state_buffer(behavioral)
port map ( a => src2, enable => src2_enable, y => selected_val );
-- . . .
-- not in book
stimulus : process is
begin
wait for 10 ns;
src1_enable <= '0'; src2_enable <= '0'; wait for 10 ns;
src1 <= '0'; src2 <= '1'; wait for 10 ns;
src1_enable <= '1'; wait for 10 ns;
src1 <= 'Z'; wait for 10 ns;
src1 <= '1'; wait for 10 ns;
src1_enable <= '0'; wait for 10 ns;
src2_enable <= '1'; wait for 10 ns;
src2 <= 'Z'; wait for 10 ns;
src2 <= '0'; wait for 10 ns;
src2_enable <= '0'; wait for 10 ns;
src1_enable <= '1'; src2_enable <= '1'; wait for 10 ns;
src1 <= '0'; wait for 10 ns;
src1 <= 'X'; wait for 10 ns;
src1 <= '1'; src2 <= '1'; wait for 10 ns;
wait;
end process stimulus;
-- end not in book
end architecture gate_level;
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