code: def load_from_bin(self, data):
          
          data = bytearray(data)
  
          machine_type = data[0]
  
          # machine_type = struct.unpack("B", bin[0])[0]
          if machine_type == 0x55:
              # Dragon DOS Binary Format
              self.load_DragonDosBinary(data)
          elif machine_type == 0x00:
              raise NotImplementedError("CoCo DECB (Disk Extended Color BASIC) Format not supported, yet.")
          else:
              raise NotImplementedError("ERROR: Format $%02X unknown." % machine_type)
docs: convert binary files to a ASCII basic string.
          Supported are:
              * Dragon DOS Binary Format
              * CoCo DECB (Disk Extended Color BASIC) Format
  
          see:
          http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=8&t=348&p=10139#p10139