Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Tribhuwan University

Institute of Science and Technology

2081

Bachelor Level / First Year / Second Semester / Science

B.Sc in Computer Science and Information Technology (CSC167)

(Microprocessor)

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 Answers Questions

Attempt any TWO questions.
[2*10=20]
1.
Explain the internal architecture of 8085 microprocessor with labeled block diagram. [10]
2.
What is ALE signal? Draw a timing diagram for LDA 5000H instruction and explain the machine cycles involved. [10]
3.
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. [10]
Section B

Short Answers Questions

Attempt any Eight questions.
[8*5=40]
4.
Explain about memory segment and segment register in 8086 microprocessor. [5]
5.
Write an ALP to convert the string 'computer science' to upper case using 16 bit microprocessor. [5]
6.
Explain different types of IO instructions. Differentiate between I/O mapped and memory mapped I/O. [5]
7.
What do you mean by vectored interrupt? Explain maskable and non-maskable interrupts in 8085 microprocessor. [5]
8.
Explain different addressing modes in 8085 microprocessor. [5]
9.
Explain Register Organization in 80386 microprocessor. [5]
10.
List out the limitation of parallel communication. Explain the different operation modes of 8255A PPI. [5]
11.
What is Descriptor? Explain the use of segment descriptor in physical address conversion in 80286 microprocessor. [5]
12.
Write short notes on :a. Flags in 8085 MPU b. DMA [5]