MU Electronics Engineering (Semester 4)
Microprocessors and Peripherals
May 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) What is stack? Explain the use and operation of stack and stack pointer?
5 M
1 (b) What is an instruction queue? Explain?
5 M
1 (c) Explain the flag register of 8085 microprocessor?
5 M
1 (d) Explain the LOCK (bar) & TEST (bar) Signal?
5 M

2 Design a 8086 based system with following specifications
CPU at 10 Mhz in minimum mode operation
ii) 64 KB SRAM using 8 KB devices
iii) 16 KB EPROM using 4 KB devices
iv) One 8255 PPI for keyboard interface
Design system with absolute decoding. Clearly show memory address man and I/O address map. Draw a neat schematic for chip selection logic.
20 M

3 (a) Explain the first five dedicated interrupts of 8086?
10 M
3 (b) Explain with one example addressing modes of 8086?
10 M

4 (a) Write 8086 assembly language program to move a string of words from offset 1000h to offset 6000h. The Length of the string is 0ch.
10 M
4 (b) Explain the following directives CODE, ASSUME, ALINE, EQU, EVEN, Various Data & Model directives.
10 M

5 (a) What are different multiprocessor configurations? Explain Closely Coupled Configuration?
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) Difference between a JMP instruction and CALL instruction.
5 M
6 (b) Flag register of 8086.
5 M
6 (c) Operation mode of 8237 DMA Controller.
5 M
6 (d) Procedure of interfacing 8259 with CPU.
5 M



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