sp07-jh-s4 - ECE 2030 Introduction to Computer Engineering...

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ECE 2030 -- Introduction to Computer Engineering EXAM #4 SOLUTION April 20, 2007 Page 1 of 2 Problem 1. (8 points) 0/0 1/1 1/0 0/0 0/ 0 1/ 0 C A B A. (4 points) 0 0 1 1 0 D 1 1 A 0 B 0 C 0 0 1 B. (4 points) Problem 2. (15 points) D 2 D 1 S 2 S 1 S 0 X S 2 S 1 S 0 0 0 0 0 0 0 1 0 0 0 1 0 1 0 0 0 1 0 1 0 1 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 1 0 0 1 1 0 x x x 0 1 1 1 x x x 1 0 0 0 1 1 0 1 0 0 1 1 0 1 1 0 1 0 1 0 0 1 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 0 1 1 0 0 1 1 1 0 x x x 1 1 1 1 x x x 00 01 11 10 S 0 X S 2 S 1 00 0 0 0 1 01 0 1 x x 11 0 1 x x 10 1 1 0 1 S 2 S 1 S 0 X 00 0 1 0 0 01 0 1 x x 11 1 0 x x 10 1 0 0 0 00 01 11 10 00 01 11 10 S 0 X S 2 S 1 00 1 0 0 1 01 0 0 x x 11 0 0 x x 10 0 1 1 0 D 0 D 2 = S 1 X + S 0 X + S 2 S 1 S 0 D 1 = S 2 S 0 X + S 2 S 0 X D 0 = S 2 S 1 X + S 2 S 1 X
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ECE 2030 -- Introduction to Computer Engineering EXAM #4 SOLUTION April 20, 2007 Page 2 of 2 Problem 3. (13 points) Memory Configuration Total bits in memory # of memory address lines # of memory data lines Size of individual memory ICs Number of memory ICs needed 4G x 8 32G = 2 35 32 8 1G x 1 4 x 8 = 32 2M x 4 2 23 21 4 512K x 1 4 x 4 = 16 64M x 16 1G = 2 30 26 16 1M x 4
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