SRM INSTITUTE OF SCIENCE AND TECHNOLOGY (Deemed University) DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING QUESTION BANK SUB : Microprocessor/CS201 YEAR/SEM : II/III UNIT I PART - A 1. Differentiate accumulator based and general purpose based microprocessor? 2. What is the purpose of PC? 3. Mention the three techniques used to program the control unit of a microprocessor? 4. Differentiate processor memory, primary or main memory and secondary memory? 5. What are the three ways of data transfer between microprocessor and I/O devices? 6. Differentiate standard I/O Vs Memory-mapped I/O 7. What is a coprocessor? 8. Distinguish Compiler and Interpreter 9. What is an Assembler 10. Mention the two main function of an OS 11. What is the difference between microprocessor and micro controller PART B 1. Explain the basic features of micro computer hardware? 2. Explain in detail about the techniques for designing memory? 3. a) Briefly explain the microcomputer system software b) Explain about different language programming in microcomputer with examples 4. With a neat block diagram, explain about a typical microcomputer development system 5. Draw the microcomputer system development flowchart and explain the stages. UNIT II PART A 1. What is the size of data and address bus in 8085? 2. What is a program status word? 3. Give an example for direct addressing mode and explain? 4. What is the difference between INRB and INX B? 5. Explain RRC instructions? 6. What is use of ALE? 7. Give examples for one-byte, two-byte and three-byte instructions? 8. What is the use of HOLD and HLDA?
9. What is an Instruction Cycle? 10. What is a Machine Cycle? 11. What is address Multiplexing? PART B 1. Explain with a neat block diagram the architecture of 8085 2. Draw the pin diagram of 8085 and explain the signals 3. Draw the timing diagram for 8085 opcode fetch, memory read and write and explain the steps 4. Categorize the 8085 instruction set with example? 5. Write short notes on a. 8085 addressing modes b. 8085 instruction formats 6. Draw the functional block diagram for an 8085 based micro computer system and explain. UNIT III PART A 1. Mention the size of data bus and address bus in 8086 2. How many memory accesses are required for even address and odd address in 8086? 3. What is instruction prefetching? 4. What is the use of direction flag and Trace flag in 8086 5. Name the segment registers of 8086 and give the size of each 6. Give an example for register addressing and immediate addressing 7. What is the purpose of DB and DW assembler pseudo instructions? 8. Explain how physical address is calculated in 8086 9. What is the use of MN/MX pin? 10. What is implied addressing mode? 11. Explain the direct and indirect port addressing mode 12. What are predefined interrupts? 13. Differentiate hardware and software interrupts PART B 1. With a neat diagram explain the architecture of 8086 2. Write briefly about the purpose of each segment register. Explain how the physical address is calculated 3. Explain in detail about different addressing modes of 8086 4. Explain in detail about 8086 instructions formats 5. Briefly explain the pin details and signals of 8086 6. Explain about 8086 interrupts system
UNIT-IV PART-A 1. Identify the basic differences between 8086 and 80186 microprocessors. 2. What are the additional features of 80186 compared to 8086? 3. What is the purpose of relocation register in the 80186 peripheral control blocks? 4. What is the relationship between internal and external clocks of the 80186? 5. How much physical and virtual memory can the 80286 address? 6. What is the difference between the 80286 real address mode and PVAM? 7. What is the purpose of 80286 CAP,COD/INTA pins? 8. What are the basic differences between the 80386 real, protected, and virtual 8086 modes? 9. Compare the features of the 80386 with those of the 80286 from the following point of view: registers, clock rate, number of pins, number of instructions, modes of operation, memory management and protection mechanism. 10. What are the pins used for interfacing 80286 to a coprocessor? 11. What is meant by the 80286 task state segment for each active task? How can this be accessed? 12. Discuss the basic differences between 80286 and 80386 descriptors. 13. How many bits are required for the address in real and protected modes? 14. Discuss briefly the 80386 segmentation unit. 15. What is the four-level hierarchical protection in protected mode? 16. Contrast the Pentium and Pentium pro with the 80386 and 80486 microprocessors. 17. Write the basic differences between Pentium II, Pentium III and Pentium IV. 18. What is the use of NA, ADS and BRDY signals in the Pentium processors? 19. Define the purpose of each 80386 debug register. 20. What is scaled index addressing? 21. What are the data types supported by 80286? PART-B 1. Describe the functional units of 80186 with its neat functional block diagram. 2. Explain in detail the 80286 memory management features and task switching. 3. Draw the internal block diagram of 80286 and explain in detail. 4. Discuss the protection mechanism of 80286. 5. Explain the basic programming model of 80386. 6. Explain the different addressing modes of 80386. 7. Explain the 80386 interrupts. 8. Explain the differences between Pentium II, Pentium III and Pentium pro processors. 9. Draw the internal structure of the Pentium pro microprocessor and explain. 10. Draw the structure of the Pentium II system and explain.
UNIT-V PART-A 1. What is memory? 2. Why semiconductor memories are used as main memory in microprocessor systems? 3. What are the different types of semiconductor memory? 4. List the features of semiconductor memories. 5. What is meant by volatile & non-volatile? 6. List the volatile & non-volatile semiconductor memories? 7. What are the characteristics of ROM memory? 8. How ROM memories are classified? 9. List the characteristics of EPROM. 10. Write a short note for the memory cell of EPROM. 11. List the features of Static RAM. 12. What is DRAM? 13. List the characteristics of DRAM. 14. Compare Static RAM and DRAM. 15. What is NVRAM? 16. What is physical memory space? 17. What is memory word Size? 18. What is meant by memory mapping? 19. What is memory access time? 20. What are the factors to be considered while selecting a semiconductor memory for a microprocessor system? 21. What is Bus Contention? 22. Why EPROM is mapped at the beginning of memory space in 8085? 23. What is chip select & how it is generated? 24. Write the typical Control signals involved in EPROM interfacing. 25. Write the typical Control signals involved in RAM interfacing. 26. What is programmed I/O? 27. What is Interrupt I/O? 28. What is DMA? 29. What is need for Port? 30. What is a Port? 31. Give some examples of port devices used in 8085 microprocessor based systems. 32. Write a short note on Intel 8258? 33. What are the different methods of interfacing I/O devices to 8085 based systems? 34. Draw a simple circuit to decode three control signals RD,WR, & IO/M & to produce separate Read/Write control signals for memory and I/O devices. 35. Compare memory mapped I/O, Standard I/O and mapped I/O. 36. What is the drawback in memory mapped I/O?
37. How DMA is initiated? 38. What are the different types of DMA? 39. What is cycle stealing DMA? 40. What is Block and Demand transfer mode in DMA? 41. What is a Programmable peripheral device? 42. What is data transfer scheme and what are its types? 43. What is Synchronous data transfer scheme? 44. What is asynchronous data transfer scheme? 45. What are the operating modes of 8212? 46. What are the various internal devices of INTEL 8155? 47. What is handshake port? 48. Explain the working of a handshake input port? 49. Explain the working of a handshake output port? 50. What are the internal devices of 8255? 51. What are the operating modes of port A of 8255? 52. What are the functions performed by port C of 8255? 53. List the functions performed by 8279? 54. What is the maximum number of keycodes that can be generated by 8279? 55. What are the programmable display functions of 8279? 56. What are the different sign modes of 8279? 57. What is the bit format used for spending asynchronous serial data? 58. What is baud rate? 59. What is RS-232c standard? 60. How the RS-232c serial bus is interfaced to TTL logic device? 61. What is USART? 62. What are the functions performed by INTEL 8251A? 63. What are the control words of 8251A & What are its functions? 64. What are the information that can be obtained from the status of 8251? 65. What are the tasks involved in keyboard interface? 66. What is debouncing? 67. What is the disadvantage in keyboard interfacing using ports? 68. What is multiplexed display? What is its advantage? 69. What is the disadvantage in 7-segment LED interfacing using ports? 70. State the functions of a CRT controller. PART-B 1. Write a program & explain how the speed of a stepper motor is controlled using microprocessor. 2. Distinguish between serial and parallel mode of data transfer. Explain DMA Scheme of data transfer. 3. Explain the concept of programmable internal timer IC 8253. 4. What is the need for programmable interrupt controller? What are the modes of operation in 8259A?
5. Give a detailed block diagram of a programmable communication interface USART.8251 and explain the function of each port. Discuss its programming. 6. Briefly explain the different modes of operation of a DMA controller. 7. Show how a floppy disk controller and a DMA controller are connected in an 8086 based systems and explain how data is transferred in such a setup. 8. Briefly explain the operation of a CRT controller 8275. 9. What is memory interfacing? Draw the interfacing circuit of IC 6116 & IC2732 and explain. 10. Draw and explain the programming format of IC 8255 PPI. 11. a) Draw a flowchart for Keyboard Scanning Subroutine. b) Draw the circuit diagram for 7 segment LED display using port.