U.G. DEGREE EXAMINATION, NOVEMBER 2017
Computer Science
Allied MICROPROCESSORS AND INTERFACING
(CBCS 2011 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Write the functions of pointers and index registers of
8086 microprocessor.
2. Write the functions of direction flag of 8086
microprocessor.
3. Write the syntax and function of register indirect
addressing mode.
4. What are the functions of stack in 8088 microprocessor.
5. Draw the pin diagram of 8253 PIT.
6. What are the operating modes of 8253?
7. Draw the internal architecture of 8272 Floppy Disk
controller.
8. Write the Read/Write control logic of 8275 CRT
controller.
9. What are the flag registers available in 80286 processor.
10. What are the data types supported by 80386 processor.
Sub. Code
1BCESA2
AFC-10498
2
Ws9
Part B x 5 25)
Answer all questions, choosing either or
11. Explain the flag registers of 8086 microprocessor.
Or
Explain about the memory timings of 8086
processor.
12. Write a assembly language program using
8086/8088 microprocessor instruction set for
addition of two numbers.
Or
Describe about sub routines.
13. Explain about 8255 programmable interrupt
controller.
Or
Explain about 8288 bus controller.
14. Explain how to interface modern with the 8088
microprocessor.
Or
Describe about the signal descriptions of 8275 CRT
controller.
15. Explain the interrupts of 80286 microprocessor.
Or
Explain about the read address mode of 80386
microprocessor.
AFC-10498
3
Ws9
Part C x 10 30)
Answer any three questions.
16. Explain about the address bus, data bus, control bus of
8088 microprocessor.
17. Describe about the assembler directives.
18. Describe about the 74LS245 transceiver of micro
computer system.
19. Describe about the system ROM.
20. Explain the register organization of 80386 micro
processor.
————————