1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
-- 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
library ieee; use ieee.std_logic_1164.all;
entity reg_ctrl is
port ( reg_addr_decoded, rd, wr, io_en, cpu_clk : in std_ulogic;
reg_rd, reg_wr : out std_ulogic );
end entity reg_ctrl;
--------------------------------------------------
architecture bool_eqn of reg_ctrl is
begin
rd_ctrl : reg_rd <= reg_addr_decoded and rd and io_en;
rw_ctrl : reg_wr <= reg_addr_decoded and wr and io_en
and not cpu_clk;
end architecture bool_eqn;
|
