Microprocessor
This course contains of fundamental concepts of computer organization, basic I/O interfaces and Interrupts operations.
Tribhuvan University
Institute of Science and Technology
2081
Bachelor Level / second-semester / Science
Computer Science and Information Technology( CSC167 )
Microprocessor
Full Marks: 60 + 20 + 20
Pass Marks: 24 + 8 + 8
Time: 3 Hours
Candidates are required to give their answers in their own words as far as practicable.
The figures in the margin indicate full marks.
SECTION A
Attempt any TWO questions.
Explain the internal architecture of 8085 microprocessor with labeled block diagram.
What is ALE signal? Draw a timing diagram for LDA 5000H instruction and explain the machine cycles involved.
Explain LHLD and SHLD instruction. Ten 8-bit data are stored at memory location starting from 6000H. Write an assembly program for 8085 microprocessor to calculate the sum of this data array and store the sum and carry starting from 9500H.
SECTION B
Attempt any EIGHT questions.
Explain about memory segment and segment register in 8086 microprocessor.
Write an ALP to convert the string “computer science” to upper case using 16 bit microprocessor.
Explain different types of IO instructions. Differentiate between I/O mapped and memory mapped I/O.
What do you mean by vectored interrupt? Explain maskable and non-maskable interrupts in 8085 microprocessor.
Explain different addressing modes in 8085 mocroprocessor.
Explain Register Organization in 80386 microprocessor.
List out the limitation of parallel communication. Explain the different operation modes of 8255A PPI.
What is Descriptor? Explain the use of segment descriptor in physical address conversion in 80826 microprocessor.
Write short notes in (any two):
- Flags in 8085 MPU
- DMA