Microprocessor (MP), B.E. Computer Science (CS), Semester 5, December 2009.

Microprocessor (MP), B.E. Computer Science (CS),

Semester 5, December 2009.

Con.5317-09

SP-8552

(3 Hours)

[Total Mark: 100]

N. B.: 1) Question no 1 is compulsory.

(2) Solve any four questions from the remaining six questions.

1. Design a 8086 based system consisting of the following:- --- (20Marks)

(a) 8086 microprocessor working at 8 MHz.

(b) EPROM of 64 KB using 32 KB devices.

(c) SRAM of 32 KB using 16 KB devices.

(d) 1 input, 1 output port (both 16 bit), interrupt devices.

Explain the design. Also show the memory and I/O map.

2. (a) Write a program using 8086 to transfer a block of data using string instructions. Also draw the flowchart of the same. --- (8 Marks)

(b) Explain the interrupt structure of the 8085 microprocessor with a neat diagram. --- (12 Marks)

3. (a) Explain the necessity of a bus controller in the 8086 maximum mode system. Also explain the 8288 Bus controller in detail. --- (10 Marks)

(b) Show an interfacing diagram of the 8086 with the 8237 DMA controller. What are the advantages of Direct memory access? Enumerate with two Practical examples. ---- (10 Marks)

4. Explain the need of Bus arbitration. What are the various Bus arbitration schemes in loosely coupled systems? Draw a multiprocessor system of Z-8086 modules using the 8289 Bus arbitor. Explain the diagram. --- (20 Marks)

5. (a) Explain the following with respect to the 8259 PIC: --- (12 Marks)

(i) Sperial Fully Nested Mode.

(ii) Sperial Mask Mode

(iii) Initialization program-of the 8259

(iv) Function of the pin SP/EN.

(b) Draw and explain how the adders/data bus is demultiplexed in the 8085.---(8 Marks)

6. (a) What is segmented memory? Enumerate the advantages of segmented memory with reference to the 8086 microprocessor. --- (10 Marks)

(b) Compare the 8085 and the 8086 microprocessor with respect to architecture, Instruction set, speed, etc. [At least 8 points] :---- (10 marks)

7. Write short notes on (any four) :- --- (20 Marks)

(a) Serial communication using the RS-232C

(b) Modes of operation of the 8253 PIT

(c) DRAM interfacing in 8086 systems

(d) 8284 Clock Generator

(e) Software interrupts in 8086

(f) Temperature Controller using 8086.