CSIT 2nd Semester
Microprocessor Board Question Paper 2079

CSC 167-2079 ✡
Tribhuvan University
Institute of Science and Technology
2079
✡
Bachelor Level/First Year/Second Semester/Science
Computer Science Information Technology (CSC 167)
(Microprocessor)
(New Course)
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 Answer Questions
Attempt any Two question.
[2x10=20]
1.

What is Instruction cycle? Draw timing diagram of MOV A, B. make necessary assumptions.

2.

Explain the architecture of 80386 with required figure. Highlight on its register organization.

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)

Section B

Attempt any Eight questions

[8x5=40]
4.

Write an assembly language program for 8086 to read two strings and check whether they are same or not.

5.

Explain different types of instruction group 8085.

6.

Explain different addressing modes of 8086.

7.

Explain the concept of multitasking in 80286.

8.

What are the practical implications of asynchronous serial communication? Explain DTE-DCE connection according to RS-232 serial communication standard.

9.

What is the purpose of programmable peripheral Interface 8255 A? Explain about its different ports.

10.

Explain memory read operation with suitable figure.

11.

What are different kinds of buses? How and why de-multiplexing of buses is carried out in 8085.

12.

Write short notes on (Any Two):
a. LTD
b. DMA
c. Assemble directives