2. INTRODUCTION TO ISAS Information search and analysis skill(ISAS) seminar: is to gather information, analyze & present. Does not involve conventional way of teaching. Emphasis is shifted from teacher-oriented tostudent-oriented methods. Information are gathered from various sources.

4. cross references,

5. abstracting,

6. summarizing &

8. INTRODUCING COMPONENTS OF SYSTEM UNIT BY ARUNAKSHI DATTA NIIT, AGARTALA

9. SYSTEM UNIT The system unit is a box-like unit. Contains number of useful components. Each components has its own discrete function. All components work to accomplish main function of computer. Sometimes called the chassis

11. Exhaust fan

12. Speaker

13. Motherboard

14. Chipset

15. Microprocessor

16. Clock chip

17. Memory-RAM & ROM

18. Bus

19. Ports

21. Converts AC input to DC output of 5-10 volt.

22. Also called Switched Mode Power Supply(SMPS).

23. Provides cable connectors to supply the required voltage to the other internal components like :

24. the floppy drives,

25. the hard disk drive,

26. themotherboard &

28. The exhaust fan rotates as long as the computer is switched on.

30. It is connect to motherboard.

31. Produces sound whenever instructed by software programs.

32. Example: when the machine starts, a self-test program is executed that uses beep to indicate that everything is working satisfactorily.

34. Contain a number of tiny electronic circuits & other components.

35. All peripheral devices are connected to the motherboard.

37. A group of integrated circuits, or chips, designed to work together.

38. Connects the motherboard components.

39. Controls the system & its capabilities.

40. All components communicate with the processor through chipset, also called “hub” of all data transfer.

41. Upgradeable only with a new motherboard.

43. A microprocessor incorporates most or all of the functions of a computer's central processing unit (CPU) on a single integrated circuit (IC, or microchip).

44. Entire design of PC is base on the microprocessor.

45. Hence CPU is often called processor.

46. It contains CU, ALU. These component work together to perform processing.Memory Information OutputDevices InputDevices Data InformationDataInformation StorageDevices

49. Can move data from one memory location to another.

50. Can make decisions & jump to new set of instructions.

52. The Pentium II (1997).

53. The Pentium III(1999).

54. The Pentium IV(2000), the fastest of among all four.Pentium® family Itanium® or Xeon

56. Signal is provided in the form of electronic pulses.

57. The chip generates a regular beat & the operations of the computer are timed to this beat.

58. Unit: MHz(Mega Hertz) & MIPS(Million Instructions Per Seconds).

60. Memory used by computer to store & data while working on the system.

61. It functions as scratch pad.

62. Characteristic:

63. Data can be read/modified.

64. Contents are lost when computer is switched of. Hence, it is volatile.

65. Capacity depends on chip installed.

66. Types:

67. Double Data Rate (DDR), Rambus Dynamic RAM(RDRAM),Synchronous Dynamic RAM(SDRAM) & Dynamic Ram(DRAM).RAM CHIP

69. It contains permanently recorded instructions, vital for starting up a computer.

70. One set of instruction found in ROM is called the ROM-BIOS(Read Only Memory Basic Input-Output Services).

71. It is non-volatile.ROM CHIP

73. Used to communicate between microprocessor & memory chip & other chip.

74. Data bus: bus with 8 wires carrying data.

75. Address bus: bus carrying address.BUS

77. Portconnects external devices to system unit.

78. TypesSerial ports Parallel ports USB ports Audio ports Infrared ports

80. Connects slow-speed devices, such as mouse.

81. Transmits more than one bit data at a time.

83. Help to attach extra input/output devices.

87. www.cs.gsu.edu/~csclxh/csc1010/Outline04.doc

88. www.slideshare.net/.../chapter-4-the-components-of-the-system-unit

89. www.coolnerds.com

90. www.webtechpoint.com