TRIBHUVAN UNIVERSITY
INSTITUTE OF SCIENCE AND TECHNOLOGY
2080 B.S.
Candidates are required to give their answers in their own words as far as practicable.
Group A
Long Answer QuestionsAttempt any Two questions.
- 1Differentiate between 8085 and 8086 microprocessor. Explain the concept of demultiplexing of address bus and why is it required?
- 2Write an Assembly Language Program for calculating the factorial of a number using 8085 microprocessor.
- 3Draw the block diagram of 80286 microprocessor and explain.
Group B
Short Answer QuestionsAttempt any Eight questions.
- 4What is Paging? Explain the concept of memory access in protected mode.
- 5What is the importance of direct memory access? Explain the mechanism of direct memory access.
- 6List different types of ports. What are the main characteristics of programmable interrupt controller 8259A?
- 7Differentiate between instruction cycle and machine cycle. Draw timing diagram of MVI A, 32 H.
- 8Write an Assembly Language Program to reverse the given string.
- 9Explain different types of system buses and also indicate whether they are unidirectional or bidirectional.
- 10What is the significance of interrupt masking? Differentiate between vectored and polled interrupt.
- 11Illustrate memory access in GDT.
- 12Write short notes on: a) Jumps b) Accumulator