SRM University 2007 B.Tech Information Technology IT201 MICROPROCESSOR AND ITS APPLICATIONS - Question Paper

4. Explain the functions of the subsequent signal sof 8279 ?
i. IRQ ii. SL0 – SL3 iii. RL0 – RL7 iv. SHIFT v. CNTL/STB vi.
vii. OUT A0 – OUT A3 and OUT B0 – OUT B3
5. What is the sensor matrix mode of 8279 ?
6. Explain the subsequent terms in relation of 8279 ?
i. 2 key lock out ii. Left Entry
7. Explain the subsequent terms in relation of 8279 ?
i. N-Key roll over ii. FIFO
8. Explain the subsequent terms in relation of 8279 ?
i. Right entry ii. Display RAM
9. Explain the key code format of 8279 ?
10. List out the various modes of 8253
11. Write short notes on (i) cascade buffer / Comparator, (ii) priority resolver
12. Explain the interrupt sequence in an 8086 – 8259A system
13. Explain interrupt on terminal count mode
14. Explain about the square wave generator mode
15. what are all the kinds of write operation in 8253.
16. Write short notes on (i) Initialization command words, (ii) Operation command words.
17. Elaborate the need of programmable internal timer 8253.

PART - B
1. Explain the initialization sequence of 8259A ? (5)
2. Explain the FIFO status word of 8279 ? (5)
3. Explain the mode set register of 8279 ? (5)
4. Draw control word format and Bit definitions of 8253 ? (5)
5. Draw OCW format and Bit Definitions of 8259 A ? (5)
6. Draw and discuss internal architecture of 8253 ? (10)
7. Explain and draw the various modes of operation of 8253 ?
8. Design a programmable timer using 8253 and 8086. Interface 8253 at an address 0040H for counter 0 and write the subsequent ALPs. The 8086 and 8253 run at 6MHz and 1.5MHz respectively. (10)
a. To generate a square wave of period 1ms.
b. To interrupt the processor after 10ms
c. To derive a mono-shot pulse with quasistable state during five ms
9. Draw and discuss the internal architecture of 8259A ? (10)
10. Elaborate the need of a dedicated keyboard display controller ? (10)
11. Draw and discuss architecture of 8279 ? (10)
12. Explain the various commands of 8279 in brief. ? (10)
13. Discuss in detail the various operating modes of 8259A





UNIT – IV
PART A 2 Marks
1. What is the advantage of DMA controlled data transfer over interrupt driven ? Why are DMA controlled data transfers faster ?
2. Draw and explain the mode set register of 8257?
3. Draw and explain the status register of 8257 ?
4. What are the register available in 8257 ? elaborate their function ?
5. Explain the priorities of DMA request inputs of 8257 ?
6. Bring out advances in 8237 over 8257 ?

7. Discuss the subsequent mode of DMA transfer
d. Single transfer mode
e. Block transfer mode
8. Discuss the subsequent mode of DMA transfer
f. Demand transfer mode
g. Memory to Memory transfer
9. Write short notes on floppies ?
10. What do you mean by SD and DD floppies ?
11. Justify the storage capacities of 360KB, 1.2MB and 1.44 MB floppies.
12. What is the advantage of MFM over FM ?
13. What is the need of a PLL circuit in drive interface circuit ?
14. How does the FDC obtains out the sector 0 on a track?
15. What do you mean by cylinder ?
16. What do you mean by attributes and special codes ?

PART B
1. Draw and explain the architecture of DMA 8257.(10)
2. Explain about DMA transfers and operations. (5)
3. Draw and explain the architecture of 8272 FDC. (10)
4. Discuss the various phases of command execution of 8272. (5)
5. Draw and explain the architecture of 8275 CRT. (10)
6. Discuss the status register of 8275. (5)
7. Discuss the functions of all the signals of 8275. (10)
8. Draw and explain a general block diagram of an 8275 interfaces with 8086.




UNIT V
PART A 2 Marks
1. Write short notes on i. Shared bus configuration of multiprocessor configuration
2. Write short notes on Linked I/O of multiprocessor configuration
3. Write short notes on Multiport memory configuration of multiprocessor configuration
4. Write short notes on Bus window of multiprocessor configuration
5. Write short notes in the subsequent inter connection topologies. (a) Star inter connection (b) Loop interconnection
6. Write short notes in the subsequent inter connection topologies. (a) Regular Topology (b) Irregular Topology.
7. What are the various kinds of instructions available in the instruction set of 8087?
8. What is the difference ranging from a loosely coupled and a closely coupled system?
9. What are the various kinds of exception which may be generated by 8087?
10. What are the various data kinds support by 8087.
11. How does the CPU differentiate the 8087 instruction from its own instruction.
12. What is called numeric data processor
13. What are called coprocessors.
14. Explain about distributed operating systems
15. Write short notes on dairy chaining
16. List out the function of interrupt service routines in the main program design.

PART B
1. Discuss the software design aspects of multi microprocessor system. (5)
2. Draw and explain the architecture of 8087. (10)
3. Discuss the function of all signals of 8087. (10)
4. Discuss register set of 8087. (5)
5. Draw and explain the interface ranging from 8086 and 8087 (10)
6. Draw and explain the architecture of 8089 I/O processor (10)
7. Write short notes on (10)
a. Polling
b. Daisy chain
c. Independent bus request scheme
8. Explain an instruction sets of 8087 ? (10)

Earning:   Approval pending.