MU Computer Engineering (Semester 5)
Microprocessor
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 the advantages of it wrt 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: SAL (b) TEST (c) STOS (d) CMP (e) 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:
  1. (a) Memory read in minimum mode
  2. (b) 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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