TRIBHUVAN UNIVERSITY
INSTITUTE OF SCIENCE AND TECHNOLOGY
2079 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.
- 1What is Instruction cycle? Draw timing diagram of MOV A, B. make necessary assumptions.
- 2Explain the architecture of 80386 with required figure. Highlight on its register organization.
- 3Write 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)
Group B
Short Answer QuestionsAttempt any Eight questions.
- 4Write an assembly language program for 8086 to read two strings and check whether they are same or not.
- 5Explain different types of instruction group 8085.
- 6Explain different addressing modes of 8086.
- 7Explain the concept of multitasking in 80286.
- 8What are the practical implications of asynchronous serial communication? Explain DTE-DCE connection according to RS-232 serial communication standard.
- 9What is the purpose of programmable peripheral Interface 8255 A? Explain about its different ports.
- 10Explain memory read operation with suitable figure.
- 11What are different kinds of buses? How and why de-multiplexing of buses is carried out in 8085.
- 12Write short notes on (Any Two): LTD DMA Assemble directives