code: def __try_read_byte_prev(self, address):
          
          # Initialize memory location with a random value
          if address not in self.__memory_prev:
              return False, None
  
          return True, self.__memory_prev[address]
docs: Read previous value for memory location.
  
          Return a tuple (True, Byte) in case of successful read,
          (False, None) otherwise.