Madras University (UnOM) 2006 B.C.A Computer Application Microprocessor and its applications - exam paper

PART A - (10 x three = 30 marks)



ans any TEN ques..

All ques. carry equal marks.

every ans should not exceed 50 words.



1. elaborate 3 components in microprocessor

based systems?



2.Define Memory.



3.What is machine language?



4. List any 3 operations commonly performed by

the MPU.



5. elaborate 3 kinds of memory transfer

instructions in 8085 instruction set?



6. discuss anyone kind of 'compare' operation in

8085 instruction set.



7.What are additional techniques for time delay?



8.Define stack.



9.List the operations of RET instruction.



10.Define Maskable Interrupt.



11.Explain the function of disable interrupt.



12.Write about HCDA signal.



PART B - (5 x six = 30 marks)



ans any 5 ques..

All ques. carry equal marks.

every ans should not exceed 200 words.



13. discuss the functions of different components of a

microprocessor based system.



14. explain about the 8085 machine language and

assembly language.



15. explain about the input/output instructions and

port addresses.



16. define the functions of the machine control

instructions HLT and NOP.



17. discuss the conditional call and return

instructions with an example.



18. discuss the multibyte subtraction with an

example.



19.Write a note on "memory mapped I/O".



PART C - (4 x 10 = 40 marks)



ans any 4 ques..

All ques. carry equal marks.

every ans should not exceed 500 words.



20. explain in detail about 8085 instruction set and

classifications.



21. discuss with an example of looping, counting and

indexing.



22. Briefly discuss the necessary instructions for

using the stack.



23. Illustrate a program for BCD-to-common-cathode

LED code conversion.



24. discuss the hexadecimal counter and pulse

timings for flashing lights.



25.Explain the direct memory access in detail.

Earning:   Approval pending.