code: def execute(self):
          
          try:
              self.current.execute()
              self.clocks += 1
              if self.clocks % 10000 == 0:
                  self.check_timers()
                  self.sched()
          except Interruption as e:
              if e.N != 0x80:
                  raise
              try:
                  self.int80(self.current)
              except RestartSyscall:
                  pass
  
          return True
docs: Execute one cpu instruction in the current thread (only one supported).
          :rtype: bool
          :return: C{True}
  
          :todo: This is where we could implement a simple schedule.