Read remainder of chapter 7 and chapter 8, and corresponding code.
Assignment: the call to retu() at line 2228 switches the processor from proc 0 (the scheduler) to proc 1, when called from main() through sched(). To what is rp->p_addr, the first argument of retu, pointing to? In retu() (line 740), what is loaded in KISA6? Again in retu(), to what is _u pointing to? Please, hand in your answers at beginning of lecture.