quick little bandaid to stop step from looping around. Basically just
check to see if the current PCB is terminated, if so -- ignore the
click. Be cool if I could still get it to cycle() the cpu but it
basically be kinda like a NO OP or whatever... just see cycle() in log
so we know we called a cycle IE: Stepped the CPU -> but nothing changed
because no active program... Next time I guess... One other thing, I
noticed on some of the sample programs it overwrites the "IDLE" ... I am
going to try that --> probably harder than it looks...