module control_unit (Instruction, Instruction_Address, EnA, EnB, Op,
                     ReadWrite, MemConst, MemALU, Zero, Positive, Const,
                     clk, rst);
    input [7:0] Instruction;
    output [5:0] Instruction_Address;
    output [1:0] Op;
    output [7:0] Const;
    output EnA, EnB, ReadWrite, MemConst, MemALU;
    input Zero, Positive;
    input clk, rst;
