Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Tribhuwan University

Institute of Science and Technology

2079

Bachelor Level / First Year / Second Semester / Science

B.Sc in Computer Science and Information Technology (CSC167)

(Microprocessor)

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 instruction cycle? Draw timing diagram of MOV A, B. Make necessary assumptions. [10]
2.
Explain the architecture of 80386 with required figure. Highlight on its register organization. [10]
3.
Write an assembly language program to find the largest number of an array using 8 bit microprocessor. (Assume appropriate array data and address where minimum array size of 15 should be considered) [10]
Section B

Short Answers Questions

Attempt any Eight questions.
[8*5=40]
4.
Write an assembly language program for 8086 to read two strings and check whether they are same or not. [5]
5.
Explain different types of instruction group of 8085. [5]
6.
Explain different addressing modes of 8086. [5]
7.
Explain the concept of multitasking in 80286. [5]
8.
What are the practical implications of asynchronous serial communication? Explain DTE-DCE connection according to RS-232 serial communication standard. [5]
9.
What is the purpose of Programmable Peripheral Interface 8255A? Explain about its different ports. [5]
10.
Explain memory read operation with suitable figure. [5]
11.
What are the different kinds buses? How and why de-multiplexing of buses is carried out in 8085. [5]
12.
Write short notes on (Any TWO):a. LDT b. DMA c. Assemble directives [5]