LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.C.A. DEGREE EXAMINATION - COMPUTER APPLICATIONS
SECOND SEMESTER – APRIL 2008
CA 2875 - MICROPROCESSOR AND ITS APPLICATIONS
Date : 24/04/2008
Time : 1:00 - 4:00
Dept. No.
DC 21
Max. : 100 Marks
PART – A
Answer all of the following :
10 x 2 = 20
1. Differentiate microprocessor and microcontroller.
2. What are delay loops?
3. What is nested procedure?
4. List the different string instructions.
5. What is an interrupt pointer table?
6. Name the different modes of operation of programmable interval timer.
7. What are the two signals used in handshaking?
8. What is an op amp? State its use.
9. Differentiate static and dynamic RAM.
10. What is virtual memory?
PART – B
Answer all of the following :
5 x 8 = 40
11.a. Explain any eight addressing modes.
(OR)
b. If 8086 operates at 8MHZ
i.
Calculate T state.
ii.
Calculate the delay for the T obtained above.
iii.
Write a program to produce a delay.
12.a. Explain the various jump instructions .
(OR)
b. What is a procedure? Explain the CALL and RETURN instructions used in a procedure.
13.a. Explain the different internal interrupts.
(OR)
b. With necessary diagram explain the memory write cycle.
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14.a. Explain the stepper motor interface with neat diagram.
(OR)
b. Explain how Digital to Analog conversion is carried out.
15.a. Explain the cache memory .
(OR)
b. Explain how physical address is generated in the protected virtual address mode of 80386.
PART -C
Answer TWO of the following : by compulsory choosing the Q.No: 16
2 X 20 = 40
16.a. Draw the architecture of 8086 microprocessor and explain the different segments.
b. Explain the various assembler directives.
17.a. With a neat diagram explain the 8259 programmable interrupt controller.
b. Explain the key board interfacing with neat diagram.
18.a. What is Co processor? Explain the Math Co processor with necessary diagram.
b. Explain the organization of 16K X 1 DRAM.
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