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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_13_fg_13_25.vhd,v 1.3 2001-10-26 16:29:35 paw Exp $
+-- $Revision: 1.3 $
+--
+-- ---------------------------------------------------------------------
+
+entity nand3 is
+ generic ( Tpd : delay_length );
+ port ( a, b, c : in bit; y : out bit );
+end entity nand3;
+
+architecture basic of nand3 is
+begin
+ y <= not (a and b and c) after Tpd;
+end architecture basic;
+
+
+library project_lib;
+library stimulus;
+use stimulus.stimulus_generators.all;
+
+entity misc_logic is
+end entity misc_logic;
+
+-- code from book
+
+architecture gate_level of misc_logic is
+
+ component nand3 is
+ generic ( Tpd : delay_length );
+ port ( a, b, c : in bit; y : out bit );
+ end component nand3;
+
+ for all : nand3
+ use entity project_lib.nand3(basic);
+
+ -- . . .
+
+ -- not in book
+ signal sig1, sig2, sig3, out_sig : bit;
+ signal test_vector : bit_vector(1 to 3);
+ -- end not in book
+
+begin
+
+ gate1 : component nand3
+ generic map ( Tpd => 2 ns )
+ port map ( a => sig1, b => sig2, c => sig3, y => out_sig );
+
+ -- . . .
+
+ -- not in book
+
+ all_possible_values(test_vector, 10 ns);
+
+ (sig1, sig2, sig3) <= test_vector;
+
+ -- end not in book
+
+end architecture gate_level;
+
+-- end code from book