/**/
  /* this big loop does it all... goes thru once per time unit */
  time = 0;
  while (!Done()) {
 
     /**/
     /* add arrivals to readyq */
 
     /**/
     /* if I/O is finished, remove off I/o and put on readyQ */
 
     /**/
     /* if burst is finished, remove off cpu and put on I/O or finished */
 
     /**/
     /* if we are doing a feedback algorithm, potentially
        reduce the feedback priority of currently-executing process */
 
     /**/
     /* check for preemption */
 
     /**/
     /* dispatch if cpu is idle */
 
     /**/
     /* 'io-dispatch' if io is idle */
 
     /**/
     /* execute one cycle on cpu */
 
     /**/
     /* do one io cycle */
 
     /**/
     /* ok, now ready to go to next time unit!  YEEHAW!!!! */
     time++;
  }