Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Tribhuwan University

Institute of Science and Technology

2076

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.
Draw block diagram of 80286 and explain its functional units.[10]
2.
Describe the working mechanism of DMA. Draw the internal architecture of the 8237 DMAC along with a timing diagram illustrating the process of DMA transfers.[10]
3.
Write an assembly language program to find the greatest number in an array in using 8 bit microprocessor. (Assume appropriate array data and address where minimum array size of 20 should be considered.)[10]
Section B

Short Answers Questions

Attempt any Eight questions.
[8*5=40]
4.
Explain the addressing modes of 8086 microprocessor with examples. [5]
5.
Write an ALP for 8086 to read a string and print it in the reverse order. [5]
6.
Differentiate between PUSH and POP instruction with example illustrating the use of these instructions. [5]
7.
Write the process of address and data separation in De-multiplexed address/data bus in 8085 microprocessor. [5]
8.
What is CALL operation? How does it differ with JUMP operation? [5]
9.
Differentiate between synchronous and asynchronous serial communication. Show DTE-DTE and DTE-DCE connection according to RS-232 serial communication standard. [5]
10.
What is flag? Explain the flags that are present in 8085 microprocessor. [5]
11.
What is instruction set? Explain various kinds of instructions of 8086 microprocessor. [5]
12.
Write short notes on: a. Harvard architecture b. GDT and LDT [5]