Computer Architecture and Microprocessor || Spring 2016

Pokhara University- Computer Architecture and Microprocessor

Level:  Bachelor Semester – Spring  Year: 2016
Programme: BCIS  Full Marks: 100

Course: Computer Architecture and Microprocessor

Pass Marks: 45
Time:  3hrs.

Candidates are required to give their answers in their own words as far as practicable of Computer Architecture and Microprocessor. The figures in the margin indicate full marks.

Section “A”

Very Short Answer Questions

Attempt all the questions. 10×2

1. What are the different types of flags in 8085?

2. Define hardwired control unit.

3. What do you mean by data transfer instruction of 8085?

4. What are the different parts of MPU?

5. Define the purpose of LDAX and STAX instruction with example.

6. What is the purpose of the interrupt?

7. What is the ‘stored program concept’?

8. How many general-purpose registers are there in 8085 and what are they?

9. List some of the characteristics of RISC.

10. Define the term fetch cycle and execute the cycle.

Section “B”

Descriptive Answer Questions

Attempt any six questions 6×10
11. Define microprocessor. Explain about different types of the bus of microprocessor along with a suitable diagram.

12. Define instruction. Why addressing modes are needed in 8085. Explain about different types of addressing modes of 8085 with a suitable example.

13. Write a program to multiply two 16 bit numbers and explain each steps in detail.

14. Define instruction cycle, machine cycle and T state. Draw the timing diagram of MVI A, 01H and explain.

15. What is PPI? Why it is used? Explain about different modes of PPI? Also explain about different control words in detail.

16. Define interrupt. Explain about hardware and software interrupt. Explain about simplex, half duplex and full duplex communication along with suitable diagram.

17. Define DMA. Explain about purpose of DMA. Draw the block diagram of 8237 DMA controller and explain its operation with the help of timing diagram.

18. Section “C”

Case Analysis (20)

20 bytes of data are stored in memory location 2056h onwards. Write a program to add all positive numbers and store the sum and carry in two memory location 5600 H and 5601H respectively. Explain each steps in brief.

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