Homework

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HOMEWORK #2

Due 31 August (Friday, 11:59 p.m. EDT)

Module 3, Book chapters 4, 7, 8

1. (10 Points) What character string does the binary ASCII code represent?

1010100 1101000 1101001 1110011 0100000 1101001 1110011

0100000 1000101 1000001 1010011 1011001 0100001

(10 Points) One large modern computer has a 48-bit memory address register. How much memory can this computer address?

(20 Points) Suppose that the following instructions are found at the given locations in memory:

Show the contents of the IR, the PC, the MAR, the MDR, and A at the conclusion of instruction 20.

Show the contents of each register as each step of the fetch-execute cycle is performed for instruction 21.

(20 Points) How many address lines, data input lines, and data output lines are required for the following RAM memories? How many bytes can this memory store?

1. 32K words x 8 bits/word

16M words x 32 bits/word

4G words x 64 bits/word

(10 Points) If a computer has a 36-bit memory address register, how much memory can this computer address?

(20 Points) The goal of scalar processing is to produce, on average, the execution of one instruction per clock tick.

1. If the clock ticks at a rate of 2 GHz, how many instructions per second can this computer execute?

How many instructions would a 2 GHz superscalar processor that processes three instructions per clock cycle execute?

(10 Points) What is the purpose of the tag in a cache memory system?

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