CSIT 2nd Semester
Microprocessor Board Question Paper 2082 Old Course

CSC 167-2082 ✡
Tribhuvan University
Institute of Science and Technology
2082
✡
Bachelor Level/First Year/Second Semester/Science
Computer Science Information Technology (CSC 167)
(Microprocessor)
(Old 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 an instruction and instruction cycle? Draw timing diagram of MVI A, 32h instruction with brief description.

2.

Draw block diagram of 8085 microprocessor and explain its components in brief.

3.

Explain about LDA and STA instruction. Write an assembly language program for 8085 microprocessor to perform 8 - bit addition with carry. (Assume Data and Memory location yourself).

Section B

Attempt any Eight questions

[8x5=40]
4.

What is pipelining? Explain with reference to BIU and EU in 8086 microprocessor.

5.

What is an interrupt? Differentiate between vectored and non-vectored interrupt.

6.

What is memory interfacing? Interface 4kb memory with 8085 microprocessor with suitable diagram.

7.

What is flag? Explain the flags that are present in 8086 microprocessor.

8.

Write an assembly language program for 8086 microprocessor to count occurrence of letter 'a' in the string "accumulator".

9.

What is DMA? Explain working of 8237 DMA in brief with suitable example.

10.

What is virtual memory? What are the operating modes of 80286 microprocessor?

11.

Explain the memory segmentation in 8086 microprocessor with suitable diagram.

12.

Write short notes on (any two):
a) Assembler Directives
b) BSR Mode
c) Descriptor Table