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;