SYSTEM UNIT

SYSTEM UNIT

1. contains system's electronic components & selected secondary storage devices

2. TYPES

   • desktops
     • separate case
   • laptops
     • portable & much smaller
   • tablets
     • mini tablest
   • smartphones
     • handheld computer
   • wearables
     • contain embedded computers

3. COMPONENTS - come in many shape & size

   • SYSTEM BOARD
     • - all components & devices are connected -data path & traffic monitor
   • SOCKET & CHIPS
   • SLOT & BUS LINES
     • bus lines - connect to CPU
       • Expansion buses
       • System bus
   • MICROPROCESSOR - cpu

4. RELATIONSHIP

   • Memory
   • Processor
   • Storage
   • Input devices
   • Output devices

5. Processor Machine Cycle

   • Repeat a set of 4 basic operations
   • Fetch
     • Decode
       • Execute
         • Store

6. Microprocessor Chip

   • 1. chip capacities 2.clock speed

7. Multicore Chips

   • 1. Multicore Processors 2. Parallel Processing

8. Specialty Processors

   • coprocessors

9. MEMORY

   • Ram
     • chips hold programs & data cache memory virtual memory
   • Rom
     • cpu can read but the computer cannot change ROM
   • Flash Memory
     • combine of RAM & ROM

10. EXPANSION SLOTS & CARDS

    • Graphics card
    • network interface card
    • wireless cards
    • SD cards

11. PORT

    • SOCKET CONNECTING TO EXTERNAL DEVICES
    • ports (pc & laptop)
    • Standard ports
    • Specialized Ports
    • Cables