natanael/ex09/Explanation.txt

   1 ex9a1
   2 From the output, we can see that the keyboard press will trigger the interupt and the counter will increase every keyboard press.
   3
   4 ex9a2
   5 The dummy task has a higher priority than the task which handle the interupt. But when the interupt is trigged, it will run the interupt first as the urgency and it become priority 257.
   6
   7 ex9b