+= read registers from userland

[raggedstone] / dhwk / source / pci / reg.vhd

-- J.STELZNER
-- INFORMATIK-3 LABOR
-- 23.08.2006
-- File: REG.VHD

library ieee;
use ieee.std_logic_1164.all;

entity REG is
        port
        (
                CLOCK :in std_logic;
                RESET :in std_logic;
                WRITE :in std_logic;
                REG_IN :in std_logic_vector(7 downto 0);
                REG_OUT :out std_logic_vector(7 downto 0)
        );
end entity REG;

architecture REG_DESIGN of REG is

        signal SIG_REG :std_logic_vector (7 downto 0);

begin

        process (CLOCK)
        begin
                if (CLOCK'event and CLOCK = '1') then
                        if RESET = '1' then
                                SIG_REG <= X"00";

                        elsif WRITE = '1' then
                                SIG_REG <= REG_IN;

                        else
                                SIG_REG <= SIG_REG;
                        end if;
                end if;
        end process;

        REG_OUT <= SIG_REG;

end architecture REG_DESIGN;