VTU Microprocessor - December 2014 Exam Question Paper

VTU Electronics and Communication Engineering (Semester 6)
Microprocessor
December 2014

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) With a neat sketch explain execution unit of 8086.

6 M

1 (b) Define addressing modes for specifying branch address and identify addressing modes of following instructions:
i) MOV [BP+SI+5], AH
ii) MOV AL, [5036]

6 M

1 (c) Explain various machine language formats used in 8086 with suitable example.

8 M

2 (a) Explain the function of following instruction with example:
(i) LEA (ii) IDIV (iii) DAA (iv) JNGE

8 M

2 (b) Write an assembly level language program to add two 16-digit packed BCD numbers.

6 M

2 (c) Explain the following directives and operators with suitable examples:
(i) SEGMENT (ii) ASSUME (iii) DUP (iv) SIZE

6 M

3 (a) Explain the following string instructions with examples.
(i) MOVS B (ii) CMPS B (iii) SCAS B (iv) Repeat prefix (REP)

8 M

3 (b) Write an Assembly level language program to convert four digit ASCII coded hexadecimal number to binary equivalent using string instructions.

6 M

3 (c) Write a recursive procedure to calculate the factorial of N.

6 M

4 (a) Give the classification of interrupts in 8086. Explain the 8086 interrupt response mechanism.

4 M

4 (b) Explain INT N interrupt instruction? Write a program that outputs characters to printer using INT 17H interrupt.

8 M

4 (c) Explain interrupt data input using suitable circuit diagram. Write interrupt service procedure for reading characters fro ASCII keyboard.

8 M

5 (a) Write a keyboard procedure that scans the keyboard and returns with numeric code of the key in AL.

10 M

5 (b) Interface eight seven-segment display, using 8255 with 8086.

10 M

6 (a) Explain data types of numeric data processor 8087.

10 M

6 (b) Represent 11.375₁₀ in short real form.

4 M

6 (c) Explain functions of following instructions:
(i) FLD (ii) FADD (iii) F2XM1 (iv) FLDl2E

6 M

7 (a) Explain minimum mode configuration of 8086.

8 M

7 (b) Explain following with respect to PCI bus
(i) PCI bus timing diagram
(ii) PCI bus coomands

8 M

7 (c) Explain types of packers and contents found on USB.

4 M

8 (a) Give the features of 80386 microprocessor. Explain its memory system and I/O system with suitable diagrams.

8 M

8 (b) Explain programming model of 80486 microprocessor with suitable diagrams.

8 M

8 (c) Explain basic features of pentium processor.

4 M

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