Comp Org And Architecture

1256 B. E. 4th Semester (CSE) Examination, December-2006 COMPUTER ARCHITECTURE AND ORGANIZATION Paper-CSE-210 .. E Time allowed: 3 hours

Maximum marks: 100

Note: Attempt any five questions. All questions carry equal marks. 1.

(a) Define the term register. Design a 4-bit bidirectional shift register with parallel load.

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(b) Draw the logic diagram and truth table for full adder. 10 2.

(a) What do you mean by Instruction Set Architecture (ISA) ? How it affects the design of a computer system? (b) Briefly discuss the stored program concept.

3.

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(a) What are the advantages and disadvantages of fixed and variable instruction formats?

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(b) What are the advantages {tffered by complex instruction set computers? (c) Discuss the following addressing modes briefly: (i)

Relative addressing modes.

(ii) Indirect addressing modes.

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(2)

4.

(a)

How a computer instruction is executed ? Draw the instruction cycle.

(b)

(a)

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Compare the characteristics of static and dynamic RAM.

(b)

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What is control unit? Discuss any two methods briefly for implementation of control unit.

5.

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What is the design principle for cache memory ? Discuss the following cache mapping scheme:

6.

(a)

(i)

Direct cache mapping ,

(ii)

Associative cache mapping.

What are the design issues for multiprocessor computer systemS ?

(b)

(a)

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What are the various types of interrupts supported by 80 x 86 family?

(b)

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How you can enhance the throughput of a computer system? Give suitable example.

7.

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Give three examples with brief description of the following: (i)

Register reference instruction

(ii)

Memory reference instruction

(ill) I/O instructions for 80 x 86 family.

8.

(a)

Draw the block diagram and briefly explain the microprogramsequence~

(b)

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Briefly discuss the Flynn's classification of digital computer.

1256 1256-p-2-Q-8 (06)

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