FIVE MARKS QUESTIONS

Section B(5 MARKS) FROM LAST YEARS QUESTION PAPERS
1. Draw the timing diagram of MOV B, A instruction.
2. Write an ALP to divide 16 bit no. by 8 bit no.
3. Draw the Block diagram of 8257.
4. Discuss various addressing modes of 8085.
5. Explain the interfacing 8251 chip with 8085 microprocessor.
6. Explain the function of the following 8085 instructions with examples.
(i) LHLD
(ii) XCHG
(iii) STA
(iv) JNC
(v) MVI
7. Write an 8085 based assembly language program to arrange a series of numbers in descending order.
8. Discuss the design of microprocessor based traffic light system.
9. What is RIM? Discuss the bit pattern of the accumulator for RIM instruction.
10. Explain the following instructions:
(i) SHLD 2040h
(ii) JMP
(iii) DAA
11. Discuss various addressing modes of 8085. explain with examples
12. Write an assembly language program to calculate the 2’s complement of a 16 bit no.
13. Explain why the PTR attribute is sometimes necessary in 8086
14. Differentiate between microprocessor and microcontroller.
15. Discuss various addressing modes of 8085. explain with examples
16. Draw timing diagram for MOV A,M instruction.
17. Explain the following instructions.
(i) MOV A, M
(ii) DAA
(iii) JMP 2000h
18. Differentiate between microprocessor and microcontroller.
19. Write an ALP to multiply the contents of memory location 2040h to 2041h.
20. Discuss various addressing modes of 8085.
21. Explain the control word register of 8255.
22. Differentiate between microprocessor and microcontroller.
23. Diagrammatically explain the difference between memory mapped & peripheral mapped I/O.
24. Draw a circuit diagram demonstrating how to create a 32k x 8 EPROM from two 16k x 8 EPROMs showing all signal connections.
25. Write an assembly language program to calculate the 2’s complement of a 16 bit no
26. Write an assembly language program that reads numbers from the users until the user types 5.
27. W.A.P. to generate Fibonacci sequence.
28. Draw Block diagram of 8251.
29. The instruction code 01001111 (4fh) is stored in memory location 2005 h, illustrate the data flow & list the sequence of events when the instruction code is fetched by MPU.
30. Draw a schematic to demultiplex bus ADO – AD7 using octal latch.
31. How does 8085 based single board microcomputer works?
32. Write an 8085 based assembly language program to arrange a series of numbers in descending order.
33. Write in brief about 8085 registers.
34. Draw microcomputer system using 8085 MPU, to memory (EEPROM, RWM), input and output and bus linking to (I/O and memory) peripherals to the MPU.
35. Draw the functional block diagram of 8085 microprocessor. Using example explain how an instruction is decoded and executed.
36. Explain the function of ALE and IO/M signals of the 8085 microprocessor.