MU Electronics and Telecom Engineering (Semester 4)
Microprocessor and Peripherals
May 2012
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) Explain adressing modes of 8085 microprocessor with example.
10 M
1 (b) What is segmented memory? State its advantages w.r.t. 8086 microprocessor.
10 M

2 (a) What is meant by DMA? Show interfacing of 8237/57 with 8086 and explain.
10 M
2 (b) Explain the following instructions with one example each: (i) SAL (ii) TEST (iii) STOS (iv) CMP (v) JC
10 M

3 (a) Explain the operation of IC 8259 with block diagram.
10 M
3 (b) Write an assembly language program for 8086 to exchange the blocks of 1KB located at 0100H and 0200H using String Instructions.
10 M

4 (a) Explain Assembler Directives of 8086.
10 M
4 (b) What are the various modes of operation of 8255 PPI?
10 M

5 (a) Explain addressing modes of 8085 microprocessor
10 M
5 (b) Draw the Timing diagrams and explain for:
(i) Memory read in minimum mode.
(ii) Memory write in maximum mode.
10 M

6 (a) Explain interrupts of 8086 in detail.
10 M
6 (b) (i) Explain generation of address bus and data bus.
5 M
6 (b) (ii) Differentiate between memory mapped I/O and I/O mapped I/O.
5 M

Write short notes on any three:-
7 (a) RS 232 serial Interface Standard.
7 M
7 (b) Memory Banking in 8086.
7 M
7 (c) 8284 Clock Generator.
7 M
7 (d) 8288 Bus Controller.
7 M



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