MICROPROCESSOR (MP) DECEMBER 2009 COMPUTER SCIENCE SEMESTER 5

MICROPROCESSOR (MP) DECEMBER 2009 COMPUTER SCIENCE SEMESTER 5 

Con.5317-09                                      (REVISED COURSE)                           SP-8552

                                                                   (3 Hours)                                [Total Marks: 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: [20 Marks]
       (a) 8086 microprocessor working at 8 MHZ.                            
       (b) EPROM of 64 KB using 16KB 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. (a) 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. [Atleast 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.