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Friday, September 2, 2016



Roll No.
Total No. of Questions : 07
BCA(Sem.–3rd)
INTRODUCTION TO MICROPROCESSOR
Subject Code : (BCA-305)
Paper ID : [2037]
Time : 3 Hrs.                                        
INSTRUCTION TO CANDIDATES :
1) Section - A is compulsory.
2) Attempt any Nine questions from Section - B.

Section - A
Q1)

a) Differentiate between microprocessor and CPU?

b) What is a bus? Why is the data bus bidirectional?

c) What is a flag? List all the commonly used flags in 8085.

d) What is the difference between LDA and STA instructions?

e) How many memory locations can be addressed by a microprocessor with 14 address lines and how many address lines are necessary to address two megabytes (2048) of memory?

f) Which pin of 8086 will differentiate between minimum mode and
maximum mode?

g) What is the role of instruction pointer in 8086?

h) What is an interrupt? List interrupts of 8086.

i) What are important signals of 8086?

j) What is a clock and what is the function of a clock generator?

k) In what all situations DMA is used?

l) List two interrupt controllers.

m) What is the need of interrupt controller?

n) Explain why each channel in 8257 DMA controller is restricted to 16K bytes of data transfer.

o) What is the role played by current address register in 8237?

Section - B

Q2) Discuss with examples the various modes involved with 8085.

Q3) Write an 8085 assembly language program to multiply two numbers each of 8 bits.

Q4) Explain the functions of the following pins of 8085 Microprocessor:
       TRAP, HOLD, READY, RESET IN.

Q5) Write a short note on RISC processors.

Q6) Explain the meaning of the following 8086 instructions:
       LOOP, DAA, CBW, IMUL, ROR.

Q7) Draw the internal architecture and functional block diagram of 8086 Microprocessor.

Q8) What are various addressing modes of 8086? Discuss them in brief.

Q9) Discuss the difference in architectures of 8085 and 8086.

Q10) Explain in detail working of 8257 DMA controller.

Q11) Discuss cycle stealing and burst mode of DMA.

Q12) Write a short note on arithmetic coprocessor.


Q13) Write an initialization program to transfer 256 bytes of data from floppy disk to memory, starting at 2050H. After the transfer, the DMA (8257) operation should be terminated.

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