BCA 2nd Semester
Microprocessor & Computer Architecture Board Question Paper (2023 Batch)

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Tribhuvan university

Faculty of Humanities & Social Science
OFFICE OF THE DEAN

2024

Bachelor In Computer Application

Course Title: Microprocessor & Computer Architecture

Code No: CACS 155

Semester:II

Full Marks:60 Pass Marks:24 Time:3 hours

Candidates are required to answer the question in their own words as far as possible.

Group A
Group B
Attempt any SIX question.
[6x5=30]
2.

Explain branch instructions in 8085 microprocessor.

3.

Differentiate between instruction cycle and machine cycle. What are different machine cycles in instructions: STA 2050H and LDA 2060H?

4.

Write a program in assembly language that finds the greatest number among 8 bytes of number stored in the memory locations starting from 5001H. Store the greatest number in 5050H.

5.

What is memory mapped I/O? Explain different types of instruction format in a basic computer system.

6.

What are the different operations in stack organization? Explain.

7.

Differentiate between RISC and CISC computer.

8.

What is instruction pipelining? Explain in detail.

Group C

Attempt any TWO questions

[2x10=20]
9.

What is addressing mode? Explain different addressing modes.

10.

What is a microprogram? Explain different formats of microinstructions. Draw the design of the control unit.

11.

a. Draw the architecture of 8086 microprocessor.
b. Write a program in assembly language that copies 10 bytes of data stored in the memory location starting from 8000H to the memory location starting from 9000H.