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4. CHAPTER. The System Unit. Competencies. 1. Basic Components and Types 2. Coding 3. Memory -- Chips 4. Cards and Buses 5. Ports and Cables. Basic Components. Computing power System unit Basic principles. Basic Types. Desktop Notebook Personal Digital Assistant. Coding.

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  1. 4 CHAPTER The System Unit

  2. Competencies 1.Basic Components and Types 2. Coding 3. Memory -- Chips 4. Cards and Buses 5. Ports and Cables © The McGraw-Hill Companies, Inc. 2002

  3. Basic Components • Computing power • System unit • Basic principles © The McGraw-Hill Companies, Inc. 2002

  4. Basic Types • Desktop • Notebook • Personal Digital Assistant © The McGraw-Hill Companies, Inc. 2002

  5. Coding Electronic Data and Instructions Binary 0s and 1s 8 bits = 1 byte

  6. System Board • Connects all components • Allows communication between devices • Main board or motherboard • Circuit board w/sockets and chips © The McGraw-Hill Companies, Inc. 2002

  7. Microprocessor CPU control unit arithmetic and logic unit

  8. Memory RAM – holds programs and data ROM – fixed start-up instructions CMOS – flexible start-up instructions

  9. RAM cache • Frequently accessed • Acts as high-speed, temporary holding area • Faster processing results © The McGraw-Hill Companies, Inc. 2002

  10. Memory Measure © The McGraw-Hill Companies, Inc. 2002

  11. System Clock • Controls speed • Synchronizes operations • Expressed in megahertz • Faster clock speed, faster computer © The McGraw-Hill Companies, Inc. 2002

  12. Expansion Slots and Cards Open architecture Network connections PC/TV combinations

  13. Also Known As • Expansion cards (plug-in boards) • Controller cards • Adapter cards • Interface cards © The McGraw-Hill Companies, Inc. 2002

  14. Kinds Available • NICs • SCSI adapter • Television boards • PC/TV combo cards • PC cards • PCMCIA cards © The McGraw-Hill Companies, Inc. 2002

  15. “Plug and Play” • System notification • Check for latest drivers © The McGraw-Hill Companies, Inc. 2002

  16. Bus Lines • Data roadway for traveling bits • More lanes, faster traffic • 64 bit bus faster than a 32 bit © The McGraw-Hill Companies, Inc. 2002

  17. Three Principal Architectures • Industry Standard Architecture (ISA) • Peripheral Component Interconnect (PCI) • Advanced Graphic Port (AGP) © The McGraw-Hill Companies, Inc. 2002

  18. Ports • Connecting socket • Four common ports • Serial • Parallel • USB • FireWire © The McGraw-Hill Companies, Inc. 2002

  19. Connect IO devices Most common Mouse Keyboard Printer Monitor Newer cables AGP – graphics monitor USB – joy stick; scanner HPSB – video camera Cables © The McGraw-Hill Companies, Inc. 2002

  20. © The McGraw-Hill Companies, Inc. 2002

  21. Look to the Future • Intel’s Mobile Module • Xircom notebook © The McGraw-Hill Companies, Inc. 2002

  22. Questions / Comments Thank U Dfrankl@calstatela.edu Danyf@adelphia.net © The McGraw-Hill Companies, Inc. 2002

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