-------------------------------------------------------------------------------
-- --
-- X X XXXXXX XXXXXX XXXXXX XXXXXX X --
-- XX XX X X X X X X X XX --
-- X X X X X X X X X X X X --
-- X X X X X X X X X X X X --
-- X X X X XXXXXX X X XXXXXX X --
-- X X X X X X X X X --
-- X X X X X X X X X --
-- X X X X X X X X X X --
-- X X XXXXXX XXXXXX XXXXXX XXXXXX X --
-- --
-- --
-- O R E G A N O S Y S T E M S --
-- --
-- Design & Consulting --
-- --
-------------------------------------------------------------------------------
-- --
-- Web: http://www.oregano.at/ --
-- --
-- Contact: 8051@oregano.at --
-- --
-------------------------------------------------------------------------------
-- --
-- MC8051 - VHDL 8051 Microcontroller IP Core --
-- Copyright (C) 2001 OREGANO SYSTEMS --
-- --
-- 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. --
-- --
-- Full details of the license can be found in the file LGPL.TXT. --
-- --
-- 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA --
-- --
-------------------------------------------------------------------------------
--
--
-- Author: Roland H鰈ler
--
-- Filename: alumux_.vhd
--
-- Date of Creation: Mon Aug 9 12:14:48 1999
--
-- Version: $Revision: 1.6 $
--
-- Date of Latest Version: $Date: 2002/01/07 12:17:44 $
--
--
-- Description: Select data path according to the actual command.
--
--
--
--
-------------------------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
library work;
use work.mc8051_p.all;
-----------------------------ENTITY DECLARATION--------------------------------
entity alumux is
generic (DWIDTH : integer := 8); -- Data width of the ALU
port (
-- inputs from control unit
rom_data_i : in std_logic_vector(DWIDTH-1 downto 0);
ram_data_i : in std_logic_vector(DWIDTH-1 downto 0);
acc_i : in std_logic_vector(DWIDTH-1 downto 0);
cmd_i : in std_logic_vector(5 downto 0);
cy_i : in std_logic_vector((DWIDTH-1)/4 downto 0);
ov_i : in std_logic;
-- outputs to control unit
cy_o : out std_logic_vector((DWIDTH-1)/4 downto 0);
ov_o : out std_logic;
result_a_o : out std_logic_vector(DWIDTH-1 downto 0);
result_b_o : out std_logic_vector(DWIDTH-1 downto 0);
-- inputs from alu core
result_i : in std_logic_vector(DWIDTH-1 downto 0);
new_cy_i : in std_logic_vector((DWIDTH-1)/4 downto 0);
-- inputs from addsub unit
addsub_rslt_i : in std_logic_vector(DWIDTH-1 downto 0);
addsub_cy_i : in std_logic_vector((DWIDTH-1)/4 downto 0);
addsub_ov_i : in std_logic;
-- outputs to alu core
op_a_o : out std_logic_vector(DWIDTH-1 downto 0);
op_b_o : out std_logic_vector(DWIDTH-1 downto 0);
alu_cmd_o : out std_logic_vector(3 downto 0);
-- outputs to addsub unit
opa_o : out std_logic_vector(DWIDTH-1 downto 0);
opb_o : out std_logic_vector(DWIDTH-1 downto 0);
addsub_o : out std_logic;
addsub_cy_o : out std_logic;
-- outputs to divider unit
dvdnd_o : out std_logic_vector(DWIDTH-1 downto 0);
dvsor_o : out std_logic_vector(DWIDTH-1 downto 0);
-- inputs from divider
qutnt_i : in std_logic_vector(DWIDTH-1 downto 0);
rmndr_i : in std_logic_vector(DWIDTH-1 downto 0);
-- outputs to multiplier
mltplcnd_o : out std_logic_vector(DWIDTH-1 downto 0);
mltplctr_o : out std_logic_vector(DWIDTH-1 downto 0);
-- inputs from multiplier
product_i : in std_logic_vector((DWIDTH*2)-1 downto 0);
-- outputs to decimal adjustement
dcml_data_o : out std_logic_vector(DWIDTH-1 downto 0);
-- inputs from decimal adjustement
dcml_data_i : in std_logic_vector(DWIDTH-1 downto 0);
dcml_cy_i : in std_logic);
end alumux;
