Subversion Repositories lem1_9min

-- lem1_9min_defs.vhd

-- type declarations & constants

library IEEE;

use IEEE.std_logic_1164.all;

package definitions is

-- machine instructions memonics sorted by code & sub-code

--      ir(8..6) op-codes

constant opMSC: std_logic_vector(2 downto 0) :="000";

--      ir(5..4) sub op-codes

constant opHLT: std_logic_vector(1 downto 0) :="00";

constant opAnC: std_logic_vector(1 downto 0) :="01";

--      ir(8..6) op-codes cont'd

constant opST:          std_logic_vector(2 downto 0) :="001";

constant opLD:          std_logic_vector(2 downto 0) :="010";

constant opLDC: std_logic_vector(2 downto 0) :="011";

constant opAND: std_logic_vector(2 downto 0) :="100";

constant opOR:          std_logic_vector(2 downto 0) :="101";

constant opXOR: std_logic_vector(2 downto 0) :="110";

constant opADC: std_logic_vector(2 downto 0) :="111";

end definitions;