A. Calculate the time taken for instruction fetch in a CPU which has the following propagation delays:
(a) Any register transfer operation: 10 ns
(b) main memory access time: 80 ns
Assuming zero delay from the completion of one microoperation to the beginning of the next, show the break-up of your calculations.
B. Which of the following instructions takes maximum time for instruction cycle?
(a) LDA (b) STA
(c) NOOP (d) HALT
(e) BUN (branch unconditionally)
Justify your answer with quantitative estimates.