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+
+-- Copyright (C) 2002 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
+
+-- analyze into resource library graphics
+
+package graphics_pkg is
+
+ attribute graphic_symbol : string;
+ attribute graphic_style : string;
+
+end package graphics_pkg;
+
+
+
+-- code from book
+
+library ieee; use ieee.std_logic_1164.all;
+library graphics;
+
+package gate_components is
+
+ use graphics.graphics_pkg.graphic_symbol,
+ graphics.graphics_pkg.graphic_style;
+
+ component and2 is
+ generic ( prop_delay : delay_length );
+ port ( a, b : in std_logic; y : out std_logic );
+ end component and2;
+
+ attribute graphic_symbol of and2 : component is "and2";
+ attribute graphic_style of and2 : component is "color:default, weight:bold";
+
+ -- . . .
+
+end package gate_components;
+
+-- end code from book