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Roll No. ..................................

Second-Term Examination

Sixth Semester [B.Tech] - April  2006

Paper Code : ETEC-302 –  Subject : Microprocessor Systems II

Time : 11/2 Hours

Maximum Marks : 30

Note : Attempt any 3 questions in all. Q1 is compulsory. Each question carries 10 marks.

Q1

( a )

List the features of PC/XT and PC/AT systems.

4

( b )

Draw and discuss the functional block diagram of a PC system. 4
( c ) Convert the decimal number 28.75 to a single precision floating point number. 2

Q2

( a )

Using a 32x8 SRAM, determine the minimum number of chips required to construct a memory interface to each of the following processor. For each interface calculate the total memory capacity provided.
i) 8088  ii) 8086   ii) 80386  iv) Pentium

10

( b )

Design a memory system to interface 64KB SRAM to 8086 CPU using 32KB SRAM IC

5

Q3

( a )

What is a bus?

1

( b )

Explain the address and data buses available in PC/XT and PC/AT system. 5
( c ) List the features of the VESA and PCI bus. 5

Q4

( a )

Using neat diagrams, explain daisy chainng, polling and independent request bus arbitration schemes.

5

( b )

Draw and discuss the interface between 8086 and 8087. 5

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