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SYSTEM UNIT

SYSTEM UNIT. Amy Pierce Comm. 165 MWF 800-850. Desktop Notebook PDA (personal digital assistant). System unit components are housed within the system unit or system cabinet. ELECTRONIC REPESENTATION.

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SYSTEM UNIT

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  1. SYSTEM UNIT Amy Pierce Comm. 165 MWF 800-850

  2. Desktop Notebook PDA (personal digital assistant) System unit components are housed within the system unit or system cabinet

  3. ELECTRONIC REPESENTATION • Data and instructions are represented electronically with a two-state binary system or numbers • A byte consists of eight bits and represents one character.

  4. BINARY CODING SCHEMES • ASCII • EBCDIC • Unicode

  5. SYSTEM BOARD • Also known as the main board or mother board • Connects all system components • a flat circuit board covered with sockets and other electronic parts, including a variety of chips

  6. MICROPROCESSORThe “brains” or the system unit • Control Unit • Arithmetic-logic unit • Microprocessor chips • Word • complex instruction set computer chips • reduced instruction set computer chips • Smart cards

  7. MEMORY • RAM • flash RAM • virtual memory • memory cache • ROM • CMOS

  8. SYSTEM CLOCK The system clock controls the speed of computer operations. It is measured in gigahertz.

  9. EXPANSION SLOTS AND CARDS • Network adapter cards • modem cards • television boards • PC cards

  10. BUS LINES • ISA • PCI • AGP • USB

  11. PORTS AND CABLES • Allow external devices to connect to the system unit • Ports - connection sockets on the outside of the system unit • types: serial, parallel, USB, and HPSB • Cables - used to connect external devices to the unit via ports

  12. Thank You

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