1. Define pipelining? How does 8086 processor implement it?
2. Analyze difference between the instructions MOV AX, 2437H and MOV AX,
[2437H]
3. Write the control word format of BSR mode in 8255.
4. How is parallel communication different from serial communication?
5. Determine the command word to set keyboard/display mode for encoded scan
keyboard with N key rollover and 16 8-bit character right entry display.
6. Identify the type of communication adopted in hello FM radio. Justify your
answer.
7. Write a program to move a string 200 bytes long from the offset address 1000H to
the offset address 3000Hin the segment 5000H.
8. What are the functions performed by port-C of 8255.
9. Explain the various addressing modes used in 8086 microprocessor with suitable
examples.
10. Describe the various modes of operation in 8253 programmable interval timer.
11. Explain the arithmetic instructions of 8086 microprocessor.
12. Describe with neat diagram about serial communication interface.
13. Design a programmable timer using 8253 and 8086. Interface 8253 at an address
of 0040H for counter 0 and write the following ALPs. The 8086 and 8253 run at 6
MHz and 1.5 MHz respectively.
(i) To generate a square wave of period 1ms.
(ii) To interrupt the microprocessor after 10ms.
To derive a monoshot pulse with quasi-stable state duration of 5ms.
14. Design a microprocessor system for the 8085 microprocessor such that it should
contain 4 Kbyte of EPROM and 2 Kbyte of RAM using two 2 Kbytes of EPROMs and
two 1 Kbytes RAM. Draw the complete interfacing diagram with appropriate chip
select logic used.
15. Design an interface between 8086 microprocessor system and two 8K x 8 RAM
memory chips (6264) and two 8K x 8 EPROM memory chip. Select the starting
address of EPROM suitably. Assign the address range 80000H to 87FFFH for
RAM and use two 74138 ICs decoder.
16. Write an assembly language program to initialize programmable parallel
communication interface in the configuration given by port A and upper port C
considered as input mode and port B and lower port C considered as output
port. Assume address of the control word register as 83H.
17. Compare the flags available in 8086 with 8085.
18. Classify the addressing modes of 1) MOV AX, 55H (BX) (SI) , 2) MOV AX, [2437H]
19. Write the control word to set PC0 in 8255.
20. List the steps involved in interfacing a memory to the microprocessors.
21. Determine the program clock command word if external clock frequency is 2
MHz.
22. Calculate the number of memory chips needed to design 1K byte memory if the
memory chip size is 1024x4?
23. Write an 8086 ALP to find average of two numbers.
24. Describe operation of 8253 timer in a) square wave generation b) interrupt or
terminal count
25. Explain the data transfer instructions of 8086 microprocessors.
26. Describe with neat diagram about parallel communication interface.
27. Explain the addressing modes in 8086 systems with suitable examples.
28. With neat diagram explain the operation of Keyboard and display controller.
29. Write an assembly language program to initialize programmable parallel
communication interface in the configuration given below:
Port A: Input with handshake
Port B: Output with handshake
Port CL: Input and Port CU: Output
Assume address of the control word register of 8255 as 23H.
30. Interface one 8Kx8 EPROM and two 8Kx8 RAM with 8085 such that the starting
address assigned to each memory chip is 0000H, 4000H and 6000 H respectively
using a 3x8 decoder IC.
31. Interface two 4Kx8 EPROMs and two 4Kx8 RAM chips with 8086. Select suitable
maps.
32. Write a program to initialize counter 2 in mode 0 with a count of C030H. Assume
address for control register = 0BH, counter 0 = 08H, counter 1 = 09H and counter
2 = 0AH.
