02000EC206052004

Pages: 2

Reg No.: Name:

Max. Marks: 100

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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fourth semester B.Tech examinations (S), September 2020

Course Code: EC206
Course Name: COMPUTER ORGANISATION (EC)

PARTA

Answer any two full questions, each carries 15 marks
Draw the block diagram of a 16-bit ripple carry adder using full adders. Calculate
the delay of a 32-bit ripple carry adder. Assume a full adder delay is 200ps.
Express the following base 10 numbers in 16-bit fixed-point two’s complement
format with eight integer bits and eight fraction bits. Express in IEEE 754 single-
precision floating-point format also. Express your answer in hexadecimal.
(a) -20.5 (b) 24.25
Explain any two assembly instruction formats in MIPS with examples.

Write the operation performed in MIPS processor when it executes the following
instructions
(a) add 500, 554, 5

(0) lw $t2, 32($0)
(0) sw $s1, 4($11)
Draw the symbol and implementation of ೩ 4 x 4 multiplier.
Discuss about operands and registers of MIPS processor. Write the use of $0,
$gp, ‏م55‎ and $t8.
PART 8

Answer any two full questions, each carries 15 marks
Explain five addressing modes of MIPS with example.
Draw the datapath for single cycle processor for sw instruction.
List the characteristics of single-cycle and multi cycle microarchitectures.
How does a multicycle processor address the weakness of single-cycle
processor?
Explain the steps involved in executing a high level language program. Draw the

flow chart.

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Duration: 3 Hours

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