code: public static byte[] intToRegisters(int v) {
          byte[] registers = new byte[4];
          registers[0] = (byte)(0xff & (v >> 24));
          registers[1] = (byte)(0xff & (v >> 16));
          registers[2] = (byte)(0xff & (v >> 8));
          registers[3] = (byte)(0xff & v);
          return registers;
      }
docs: Converts an int value to a byte[4] array.
  
  @param v the value to be converted.
  
  @return a byte[4] containing the value.