MICROPROCESSOR (MP) DECEMBER 2011 COMPUTER SCIENCE SEMESTER 5
| Q.1 A) | Explain in brief yhe interupts in Intel 8085 up. | (5) |
| B) | Draw the circuit diagram for generation of RESET signal and explain it's working. | (5) |
| C) | Design an interface for 8255 with the following requirements: 1, 16-bit I/P and | (5) |
| 1, 16-bit O/P port. Starting address is 20000H. | ||
| D) | Differentiate between the Memory mapped I/O and I/O mapped I/O. | (5) |
Q.2 A) | Design 8086 based system with following specifications: | (10) |
| a) Interface 32 KB SRAM. Use IC 6264. | ||
| b) Interface 16 KB DRAM. Use 8 KB Chips. | ||
| B) | Explain the following Intel 8086 assembly language instructions giving example: | (10) |
| a) SAL, b) TEST, c) DAA, d) JA, e) NOP. | ||
Q.3 A) | Explain the operation of IC 8254 as a square wave generator with the control | (5) |
| word and timing diagram for count value of 4. | ||
| B) | IC 8255 is interfaced with Intel 8086 at an address 2006H. Write a set of | (5) |
| statements in assmbly language to initialize it such that Port A will be in | ||
| mode 2, Port B will be in model 1 Output. | ||
| C) | Explain the operation of IC 8259 with the block diagram. Explain all the | (10) |
| signals in detail. | ||
Q.4 A) | Write an Assembly language program for Intel 8086 processor to perform the | (5) |
| division of 2 digit BCD number which is in unpacked form. | ||
| B) | Explain the fully nested mode of PIC 8259. | (5) |
| C) | Explain the modes of operation of a DMA Controller. | (10) |
Q.5 A) | Explain following addressing modes of Intel 8086. Write an instruction for each | (5) |
| mode: | ||
| a) Direct addressing mode, b) Relative base indexed. | ||
| B) | Draw the flowchart for intilization sequence of PIC 8259. | (5) |
| C) | What do you understand by bus arbitration? Explain the different bus arbitration | (10) |
| techniques with diagram. | ||
Q.6 A) | Explain the memory segmentation in Intel 8086 processor with it's advantages & | (5) |
| diadvantages. | ||
| B) | Explain the status signals of Intel 8086 processor. Show all the possible | (5) |
| combination along with the processor state and 8288 command associated with each | ||
| combination. | ||
| C) | Explain the operational command words of PIC 8259. | (10) |
Q.7) | Explain the following in brief:- | (20) |
| A) RS 232C interface | ||
| B) Fixed and Variable port addressing formats | ||
| C) Address decoding techniques | ||
| D) Difference between Software and Hardware interupts. |
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