B.C.A-B.C.A Computer Application MICROPROCESSORS AND PERSONAL COMPUTERS (Alagappa University - Directorate of Distance Education-2012)

DISTANCE EDUCATION
B.C.A./B.C.A. (Lateral) DEGREE EXAMINATION, MAY 2012.
MICROPROCESSORS AND PERSONAL COMPUTERS
(2003 onwards)
Time : Three hours Maximum : 100 marks
Answer any FIVE questions.
All questions carry equal marks. (5 × 20 = 100)
1. (a) With a suitable functional diagram. Explain the address bus and control bus. (10)
(b) Write a detailed note on ‘‘Evolution of Microprocessor’’. (10)
2. (a) Draw the functional block diagram of 8085. Explain its architecture. (10)
(b) What is an interrupt? Explain about the Software and Hardware interrupts. (10)
3. (a) List out the addressing modes that are found in 8085. Explain each with an example. (10)
(b) Explain what operation will take place when the following instructions are executed in 8085
(i) LXI rp, data
(ii) LDA addr
(iii) LHLD addr
(iv) STA addr
(v) SHLD addr. (5 × 2 = 10)
4. (a) Write an AL program to add two hex numbers CB and E9. After the execution of the program, give the status of various flag. (10)
(b) Write an AL program to multiply two 8 bit numbers stored in memory location 8C 00 and 8C 01 and place the result in memory location 8C 02. (10)
5. (a) Give a short note about the memory Hierarchy. (5)
(b) Discuss in detail about the RAM and various types of ROM. (15)
6. (a) Explain what is memory mapped I/O scheme and I/O mapped I/O scheme. (10)
(b) Explain the working of Direct Memory Access data transfer. (10)
7. (a) Discuss in detail about the internal organization of 80486. (10)
(b) Give a brief note about the following
(i) SCSI interface (5)
(ii) SUGA Video Card. (5)
8. (a) Discuss about the passive preventive maintenance procedure in detail. (12)
(b) Give a brief note about the data backup system. (8)

Earning:  ₹ 6.75/-