USN 06cs46

Fourth Semester B.E. Degree Examination, Dec. 20l3/Jan.2OL4Gomputer Organization

Time: 3 hrs. Max. Marks:100Note: Answer FIYEfull questions, selecting

utlesst TWO questions from each part.

PART - A ,''',,,.,"""'

I a. ,,

*t n a general block diagram, explain the functions of each of the processor ret*o?[i *r*,

b. Highlighting important technological features and advances, explain :"the evolution ofcomputer over different generations. (08 Marks)

c. With suitable example, explain how performance is measured using SPEC rating and give its

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2 a. Convert the followjng pair of decimal numbers into 5 bft singed 2's complement binarynumbers and perform operations indicated. Also state if overflow occurs.i) - 10 and -_ 13 (additio.n) ii) - 14 and 11 (subtraction) iiD - 3 and - 8 (addition)iv) - 10and - 13 (subtraction) . .:,, (08 Marks)

b. Given the following instrtrotion, rewrite using only,difect, indirect and immediate addressing

significanCe.

memory ohips.Explain the working of a dynamic memory cell.

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(04 Marks)

(05 Marks)(07 Marks)

(06 Marks)(08 Marks)

(10 Marks)

modes to achieve the same effest : move 123 (Rr, R ), (&, &).c. What is a stack frame? Explain its use in subroutines.

3 a. What is an interrupt? Explain its ;oncepts and the hardware used to realize it. (06 Marks)b. What is the necessity of DMA? Explain the two modes in which DMA interface operates to

transfer data. , '

c. Explain the bus arbitration approaches with thoihelp of neat sketches.

4 a. Explain the combined input/output interface circuit, with help of a neat logic block diagram.

b. With respect to USB, di;;;r the USB architecture, addressing and protocol adopted.

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5a. With a block diagram, explain the organization of 8 M x 32{iffiSfflgSpg {f2fiK x 8;lr2ixtpl:*.I05 M

(08 Nlarks)(08 Marks)(04 Marks) ,,

b.

c.d.

What is memory interleaving? Explain. \aS$S{Gp---(on uarrrs)- - J -- ---e- r -_

Calculate the average access time experienced by a processor if cache hit rate is 0.88, misspenalty is 0.015 milliseconds and cache access time is 10 micros seconds. "". {{4 Marks)

Explain how virtual memory addres-s translation based on fixed - length pages is organizedand achieved.Explain the design of a 4 - bit carry - lookahead adder.Write a note on optical technology used in CD systems.

(10 Marks)(10 Marks)

6',, a.

b.c.

7a.

b.

8a.

Draw the circuit diagram for binary division. Explain the non - restoring division algorithm,with suitable example.Explain the IEEE standard for floating point number representation.

Mention and explain the control sequences for execution of an unconditional branchinstruction. (10 Marks)

b. With a block diagram, explain the basic organization of a micro-programmed control unit.(10 Marks)

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