code: def _read_string(self, cpu, buf):
          
          filename = ""
          for i in range(0, 1024):
              c = Operators.CHR(cpu.read_int(buf + i, 8))
              if c == '\x00':
                  break
              filename += c
          return filename
docs: Reads a null terminated concrete buffer form memory
          :todo: FIX. move to cpu or memory