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Posted By: Sriram Member Level: Diamond Posted Date: 18 Jun 2008
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2006 Andhra Pradesh State Jawaharlal Nehru Technological University B.Tech PC BASED INSTRUMENTATION Set No. 2 Question paper
Code No: RR411002 Set No. 2
IV B.Tech I Semester Regular Examinations, November 2006
PC BASED INSTRUMENTATION
( Common to Electronics & Instrumentation Engineering and
Instrumentation & Control Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. Explain the steps involved in communication of a PC with external devices? [16]
2. With a figure explain about the essential features of operating system for PC based
Instrumentation in detail. [16]
3. What is a DMA Logic ? Draw the block diagram of a DMA Logic and explain its
operation in detail. [16]
4. (a) Give a typical VME system architecture.
(b) Explain the operation of centralized bus allocation schemes with respect to
VME bus. [8+8]
5. Describe the salient features of the 1488 TTL to RS-232 converter with a neat
diagram. [16]
6. Draw the pin details of I/O channel bus of IBM PC system board and explain.[16]
7. (a) Write the features and applications of Digital I/o and timer card.
(b) How the base address of the timer card is selected? [8+8]
8. (a) What is a driver?
(b) What is a Virtual Machine?
(c) Explain Processor Mode, Protected Mode and Virtual Mode. [16]
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