CAM Model Question 4

Section A

Very Short Answer Questions

Attempt all the questions. 10×2

1. What is address bus? How can we identify memory handing capacity of microprocessor?

2. What is a machine cycle? What is its relation with instruction cycle?

3. What is memory Fetch operation?

4. Why ALE is initially high?

5. What is BSR mode and write the control word format in the BSR mode

6. Which type of communication is preferable for short distance and why?

7. What is memory mapped I/O and I/O mapped I/O?

8. What is polling?

9. What is a RISC machine?

10. What is the use of TRAP signal?

Section B

Descriptive Answer Questions

Attempt any six questions. 6×10

11. What is stored program concept? Explain the processing cycle of a stored program computer.

12. Computer Von-Neumann and Harvard architecture with suitable diagrams.

13. What are assemblers? Write an ALP for 8085 Microprocessors to find the largest of three numbers.

14. Define T-state. Explain timing for instruction INO4H.

15. What do you mean by PPI? Explain how control words can be made for different modes.

16. Draw a block diagram of 8259 PIC and explain initialisation command words (ICWS) and operational command words (ocws).

17. What is multiprocessing? Explain different mechanisms for parallelism.

Section C

Case Analysis

18. A Computer system with 8085 microprocessor is to be interfaced with one ROM and one RAM each of 2KB.

i. What are the things that are to be considered while designing the address decoding circuit for memory interfacing

ii. Design the address decoding circuit to interface provided ROM and RAM consecutively at address C000H using the efficient decoder.

19. Write an ALP to find the square of a given number. Write comments for each line.