Code No. 2175/O

FACULTY OF ENGINEERING B.E. 3/4 (CSE) I-Semester (Old), Examinations, November / December 2012 Subject: Microprocessor Systems and Interfacing Time: 3 Hours

Max. Marks: 75

Note: Answer all questions from Part-A and Answer any five from Part-B Part-A (25 marks) 1. What are the features of Intel 8086?

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2. What are the flags in 8086?

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3. What is meant by Maskable interrupts ?

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4. Define Macros

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5. Define Cycle stealing

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6. Define Zeal and protected mode of Pentium processors

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7. What is the functions of Bit set Reset mode in 8255

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8. What is USART?

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9. Write the difference between NOP and HLT instruction

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10. Define interrupt service Routine

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Part-B (5 x 10 = 50 marks) 11. Explain the architecture of 8086 Microprocessor with neat block diagram

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12. Explain the procedure to handle CALL instruction and what are the different types of CALL instruction

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13. a) List out the 8086 shift instructions with an example b) Write about various addressing modes in 8086 architecture 14. Define Procedures, explain the procedure to handle stack operations in 8086 microprocessor architecture 15. What are the functions of DMA controller Explain with neat block diagram of 8237 – DMA controller 16. Write about the different models of operation in programmable Timer 8253 17. a). Explain in detail the protected mode operations of Pentium processor b). Explain interrupt Service Routine and Interrupt Vector table ******

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