Subversion Repositories xmatchpro

--This library is free software; you can redistribute it and/or
--modify it under the terms of the GNU Lesser General Public
--License as published by the Free Software Foundation; either
--version 2.1 of the License, or (at your option) any later version.
 
--This library 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
--Lesser General Public License for more details.
 
--You should have received a copy of the GNU Lesser General Public
--License along with this library; if not, write to the Free Software
--Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 
-- e_mail : j.l.nunez-yanez@byacom.co.uk
 
-------------------------------------
--  ENTITY       = DECODE4_16_INV  --
--  version      = 3.0             --
--  last update  = 10/09/99        --
--  author       = Jose Nunez      --
-------------------------------------
 
 
-- FUNCTION
-- 4 to 16 match location decoder (active high outputs)
 
-- PIN LIST
-- MATCH_LOC_IN  = input match location (binary)
-- MATCH_LOC_OUT = output match location (active high outputs)
 
 
library ieee,dzx;
use ieee.std_logic_1164.all;
use dzx.bit_arith.all;
use dzx.attributes.all;
 
entity DECODE4_16_inv is
port
(
      MATCH_LOC_IN : in bit_vector(3 downto 0) ;
      MATCH_LOC_OUT : out bit_vector(15 downto 0) 
);
 
end DECODE4_16_inv;
 
architecture DEC1 of DECODE4_16_inv is
begin
 
DECODE : process(MATCH_LOC_IN)
 
begin
case MATCH_LOC_IN is
    when "0000" => MATCH_LOC_OUT <= x"0001";
    when "0001" => MATCH_LOC_OUT <= x"0002";
    when "0010" => MATCH_LOC_OUT <= x"0004";
    when "0011" => MATCH_LOC_OUT <= x"0008";
    when "0100" => MATCH_LOC_OUT <= x"0010";
    when "0101" => MATCH_LOC_OUT <= x"0020";
    when "0110" => MATCH_LOC_OUT <= x"0040";
    when "0111" => MATCH_LOC_OUT <= x"0080";
    when "1000" => MATCH_LOC_OUT <= x"0100";
    when "1001" => MATCH_LOC_OUT <= x"0200";
    when "1010" => MATCH_LOC_OUT <= x"0400";
    when "1011" => MATCH_LOC_OUT <= x"0800";
    when "1100" => MATCH_LOC_OUT <= x"1000";
    when "1101" => MATCH_LOC_OUT <= x"2000";
    when "1110" => MATCH_LOC_OUT <= x"4000";
    when "1111" => MATCH_LOC_OUT <= x"8000";
end case;
end process DECODE;
end DEC1;  -- end of architecture