package mipsdissasembler;

import java.io.*;

public class MipsDissasembler {

public static void main(String[] args) throws IOException {
   // TODO code application logic here

// The array with machine codes embedded in program
int[] codes = { 0x032BA020,
               0x8CE90014,
               0x12A90003,
               0x022DA822,
               0xADB30020,
               0x02697824,
               0xAE8FFFF4,
               0x018C6020,
               0x02A4A825,
               0x158FFFF7,
               0x8ECDFFF0};
   int address = 0x9A040; // address of machine code
   int opcode; // opcode
   int rs, rt, rd; // source and target registers
   short immediate; // immediate value
   int function; // function for R type opcodes
   String str; // string to help in output formatting
   String line;
   File OutputFile = new File("d:/output.txt"); //Put any pahth here
   OutputFile.createNewFile();
   FileWriter fw = new FileWriter(OutputFile);

   // Print header lines
   // To Console
   // System.out.println("       MIPS DISASSEMBLY");
   // System.out.println("ADDRESS    MACHINE CODE    ASSEMBLY");

   // To file
   fw.write("       MIPS DISASSEMBLY\n");
   fw.write("ADDRESS    MACHINE CODE    ASSEMBLY\n");
   // Loop trough all machine instructions
   for (int i = 0; i < codes.length; i++)
   {
         // Convert the address to hex string
         str = Integer.toHexString(address);
         // Add additional leading zeros until length is 5
         while (str.length() < 5)
         {
            str = "0" + str;
         }

Using 8 bit binary representation of decimal 20 and 5, add the two...