C-09-EC-404
3470
BOARD DIPLOMA EXAMINATION, (C-09)
OCT/NOV-2012
DCME-FOURTH SEMESTER EXAMINATION
DIPLOMA MICROPROCESSORS QUESTION PAPER
Time: 3 hours] [Total
Marks: 80
PART-A
Instructions: (1)
Answer all questions
Each question carries three marks.
Answers should be brief and straight to the
point and shall not exceed five simple sentences.
1. Explain
cache memory.
2. Describe
instruction format
3. List
the types of interrupts of 8086.
4. State
the purpose of pointer and index registers.
5. Write
any six features of Intel 8086 microprocessor.
6. List
any three instructions which affect flags of 8086
7. Generate
the machine code for the instruction MOV AX, [SI]. The opcode for MOV is
100010.
8. Explain
RETURN instruction.
9. Write
any six features of 80486
10. List
any six features of 80386.
PART-B
Instructions: (1) Answer any five
questions.
(2) Each question carries ten
marks.
(3) Answers should be comprehensive and the criteria for valuation is
the content but not the length of the answer
11. (a)
explain the fixed-point and floating-point representations with examples and
compare them. (b) define micro-operation and macro-operation
12. Draw
the bock diagram of accumulator-based CPU and explain the function of each
unit.
13. (a)
write any five differences between 8-bit and 16-bit microprocessors. (b)
explain the concept of parallel processing.
14. Describe
block diagram and bus-cycle timing diagram of 8086 minumum mode.
15. (a)
describe any five assembler directives. (b) list any two assembly language
development tools and describe them.
16. Write
an assembly language program to find the smallest of ‘N’ 8-bit number stored
from SOURCE. Store the smallest number at RESULT.
17. Write
any five differences among 80286, 80386, 80486 and Pentium.
18. Explain
the architecture of 80286 with a neat diagram.
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