Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Tribhuwan University

Institute of Science and Technology

2079

Bachelor Level / First Year / Second Semester / Science

Bachelors in Information Technology (BIT151)

(Microprocessor and Computer Architecture)

Full Marks: 60

Pass Marks: 24

Time: 3 Hours

Candidates are required to give their answers in their own words as for as practicable.

The figures in the margin indicate full marks.

Section A

Long Answers Questions

Attempt any TWO questions.
[2*10=20]
1.
What is 8085 microprocessor? Explain the functional units of 8085 microprocessor in brief.[10]
2.
Draw the block diagram of Hardwired control unit and explain their functional units in brief.[10]
3.
State an algorithm for the restoring division method of fixed point binary division.Show the step-by step division process using restoring division algorithm when 448(0111000000) is divided by 17(10001). Use 5-bit register to represent the numbers.[10]
Section B

Short Answers Questions

Attempt any Eight questions.
[8*5=40]
4.
What is the difference between SAP-1 and SAP-2? [5]
5.
What is instruction cycle? If the clock frequency is 5 MHz, how much time is required to execute an instruction MVI A, 08H? [3+2]
6.
What is Microoperations? Explain the function of each following microoperations

$AR ⟵ PC$

$DR ⟵ M[AR], PC ⟵ PC+1$

$AR ⟵ DR(0 - 10), CAR(2 - 5) ⟵ DR(11 - 14)$
[5]
7.
What is Instruction Format of basic computer architecture? A computer uses a memory unit with 256K words of 32 bits each. Draw the instruction word format and indicate the number of bits in each part. [5]
8.
Write a 8085 assembly langauge for division of two 8-bit numbers by repeated subtraction method. [5]
9.
Explain the use of mapping table. [5]
10.
What is the difference between isolated 1/0 and memory-mapped I/0? What are the avantages and disadvantages of each? [5]
11.
What is pipelining? Explain the role of pipelining in computing. [5]
12.
Write short notes on: a.) Multiplexed Address Write short notes on: b.) Memory Hierarchy [2.5+2.5]