mbr.vhd

来自「用VHDL语言设计简单的CPU」· VHDL 代码 · 共 26 行

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;

entity mbr is
	port
	(	acc_in,memory_in:in std_logic_vector(15 downto 0);
		cs:in std_logic_vector(31 downto 0);
		clk:in std_logic;
		mbr_out:out std_logic_vector(15 downto 0)
	);
end mbr;

architecture behave of mbr is
begin
	process(clk)
		begin
			if clk'event and clk='1'then 
				if cs(15)='1'then 
					mbr_out<=memory_in;--memory to mbr
				elsif cs(16)='1'then
					mbr_out<=acc_in;--acc to mbr
				end if;
			end if;
	end process;
end behave;