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Microprocessor and Interfacing B.Tech 5th semester sample paper Dec-2013Paper Code: EE-309-F
Note : Attempt five questions in total selecting one question from each of the four units. Questions No. 1 is cumpulsory.
- (a) Why AD0 - AD7 lines multiplexed in 8085.
- (b) Write a program to find 1's complement of the number
- (c) What is Pipelining ? How does this occur.
- (d) What is wrong with a MOV instruction ?
- (e) Explain following instructions with example : SPHL, XTHL, RET, and IN address.
Q.3(a). What is the functioning of timing and control unit in 8085 microprocessor ? Discuss all its signals in detail.
Q.3(b). Differentiate between vectored and Non-vectored interrupt. Also explain interrupt structure with proper diagram.
Q.4(b). If the first instruction of a program is to be fetched from 12340H. What should the value of CS register be ? The sixth instruction to be fetched is at memory location 1234FH. What should be the value of IP register ? (Hint : Assume IP to be 000H for first part)
Q.5.(a). Explain the block diagram of 8086 microprocessor.
Q.5.(b). How physical address is computed in 8086 microprocessor ?
Q.6.(a). Explain directives used in assembly language program ? Why are segment directives used.
Q.6.(b). Write a simple assembly program to subtract two memory locations, where each memory location is one byte wide.
Q.7.(a) Explain NOP and HLT instructions.
Q.7.(b) Write a 8086 assembly language program to find largest number in a data array.
Q.8.(a). Explain Pin diagram of 8237 DMA controller.
Q.8.(b). Explain BSR and I/O modes of 8255 PPI chip.
Q.9. Explain (Any two) :
- Instruction register and Priority Resolver.
- 8259-A Programmable interrupt controller.
- 8253/8254 programmable Interval time.