Introduction To Computing Systems
3rd Edition
ISBN: 9781260150537
Author: PATT, Yale N., Patel, Sanjay J.
Publisher: Mcgraw-hill,
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Chapter 4, Problem 19E
Shown below is a byte-addressible memory consisting of eight locations, and its associated MAR and MDR. Both MAR and MDR consist of flip-flops that are latched at the start of each clock cycle based on the values on their corresponding input lines. A memory read is initiated every cycle, and the data is available by the end of that cycle.
Just before the start of cycle 1, MAR contains 000, MDR contains 00010101, and the contents of each memory location is as shown.
a. What do MAR and MDR contain just before the end of cycle 1?
MAR: 
MDR: 
b. What does MDR contain just before the end of cycle 4?
MDR: 
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Chapter 4 Solutions
Introduction To Computing Systems
Ch. 4 - Prob. 1ECh. 4 - Prob. 2ECh. 4 - What is misleading about the name program counter?...Ch. 4 - Prob. 4ECh. 4 - Prob. 5ECh. 4 - What are the two components of an instruction?...Ch. 4 - Prob. 7ECh. 4 - The FETCH phase of the instruction cycle does two...Ch. 4 - Prob. 10ECh. 4 - State the phases of the instruction cycle, and...
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