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Reg. No. Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FOURTH SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2018 Course
Code: EC 206
Course Name: COMPUTER ORGANIZATION
Max. Marks: 100 Duration: 3 Hours

PART A (MODULE I & 11)
Answer any two out of three questions Marks

1 (a) How is Carry- Look ahead Adder different from Ripple Carry Adder? Explain (10) with
relevant diagrams and write down the delay equations for both adders. b In a 32- bit Adder

circuit assume each 2 -input gate delay is 200ps. Calculate (5)

(a) Total delay for a Carry Look Ahead adder when the full adder delay is 400ps and
is divided in to 4 bits block (b) Total delay for a Prefix Adder.

2 8 Design a 16-bit prefix adder and explain its working. Also obtain the delay of an (10)
N-bit prefix adder b What is meant by R-Type instruction? Draw the R-Type machine
instruction (5) format. Find the machine code for the R-Type instruction add $s0,$s1,$s2 with

function code 32.

3 a Design a 4-bit right and left shifter using multiplexers. (5) b What are I-Type
instructions ? Explain with its instruction format. (5) ௦ Explain the MIPS
assembly codes for conditional branch instructions beq and bne (5) with examples.

PART 8 (MODULE द्धा)
Answer any two out of three questions.

4 8 Discuss the different MIPS addressing modes. (8 ) b What are Pseudo instructions? Given
the pseudo instruction " mov 551,552 ". (7 ) Write down its corresponding MIPS instruction
and explain its working.

5 aDescribe step by step the working of a single cycle data path for subtracting two (10) numbers.
b What are the parameters used for the performance analysis of a single cycle (5) processor?

Explain.

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