STUPIDSID
1 (a)
Explain flag register used in 8085 processor.
5 M
1 (b)
Define the Instruction cycle, Machine cycle & T State?
5 M
1 (c)
What is REP prefix? How it functions for string instructions?
5 M
1 (d)
Explain the difference between a JMP instruction and CALL instruction.
5 M
2
Design a 8086 based system with following specification.
· CPU at 10 MHz in minimum mode operation
· 32 KB SRAM using 8 KB devices
· 64 KB EPROM using 16 KB devices
· One 8255 PPI for keyboard interface
Design system with absolute decoding. Clearly show memory address map and I/O address map. Draw a neat schematic for chip selection logic.
· CPU at 10 MHz in minimum mode operation
· 32 KB SRAM using 8 KB devices
· 64 KB EPROM using 16 KB devices
· One 8255 PPI for keyboard interface
Design system with absolute decoding. Clearly show memory address map and I/O address map. Draw a neat schematic for chip selection logic.
20 M
3 (a)
Explain the Interrupt structure of 8086 processor?
10 M
3 (b)
Discuss the various addressing modes of 8086. What are displacement, based and index? What is an effective address or offset?
10 M
4 (a)
Write program to find out largest number in an array.
10 M
4 (b)
Write program to find out number of times letter 'e' exist in the string 'exercise', Store the count at memory.
10 M
5 (a)
Explain the interface of 8087 co-processor with 8086 processor?
10 M
5 (b)
Sketch and explain the interface of PPI 8255 to the 8086 microprocessor in minimum mode. Interface four 7 segment LEDs to display as a BCD counter
10 M
6 (a)
Explain the function of various flags of 8086 microprocessor.
5 M
6 (b)
The function of the pins S2, S1 & S0 of 8086.
5 M
6 (c)
Operation modes of 8237 DMA Controller.
5 M
6 (d)
Draw and explain the instruction template format of 8086.
5 M
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