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       = MC_MUX_3      --
--  version      = 4.0         --
--  last update  = 11/02/98    --
--  author       = Jose Nunez  --
---------------------------------
 
 
-- FUNCTION
-- Movement control multiplexor.
-- Selects either a compressed (A inputs) or decompressed
-- (B inputs) match location and full hit indicator and
-- makes them available on the Y outputs under the control
-- of SELB. If SELB=0 then B inputs are selected.
 
--  PIN LIST
-- A   = match location for compression
-- B   = match location for decompression
-- SELB = select 
-- ENABLEC = enable compression
-- ENABLED = enable decompression
-- Y   = match location output
 
library ieee,dzx;
use ieee.std_logic_1164.all;
use dzx.attributes.all;
 
entity MUX_RAM is
	 port (
			RAM_DATA : in std_logic_vector(31 downto 0);
			RAM_MASK : in std_logic_vector(3 downto 0);
			REG_DATA : in std_logic_vector(31 downto 0);
			REG_MASK : in std_logic_vector(3 downto 0);
			EQUAL : in bit;
			ASSEM_DATA : out std_logic_vector(31 downto 0);
			ASSEM_MASK : out std_logic_vector(3 downto 0)
 
	  );
 
end MUX_RAM;
 
architecture MULTIPLEX_3 of MUX_RAM is
 
begin
 
MUX : process (RAM_DATA , RAM_MASK, REG_MASK, REG_DATA , EQUAL )
begin
	if (EQUAL = '1') then
	        		    ASSEM_DATA <= REG_DATA;	
			     		ASSEM_MASK <= REG_MASK;	
	else
	                    ASSEM_DATA <= RAM_DATA;	
	                    ASSEM_MASK <= RAM_MASK;
     end if;
 
end process MUX;
 
 
end MULTIPLEX_3;