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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
+
+-- not in book
+
+library ieee; use ieee.std_logic_1164.all;
+
+-- end not in book
+
+
+entity program_ROM is
+ port ( address : in std_ulogic_vector(14 downto 0);
+ data : out std_ulogic_vector(7 downto 0);
+ enable : in std_ulogic );
+
+ subtype instruction_byte is bit_vector(7 downto 0);
+ type program_array is array (0 to 2**14 - 1) of instruction_byte;
+ constant program : program_array
+ := ( X"32", X"3F", X"03", -- LDA $3F03
+ X"71", X"23", -- BLT $23
+ -- not in book
+ others => X"00"
+ -- end not in book
+ -- . . .
+ );
+
+end entity program_ROM;