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Computer Startup

Computer Startup. Power. Electricity Warms up components And heads to the CPU. BIOS. Basic Input / Output System chip with it’s programs called. BIOS runs POST. CMOS. The CMOS Chip contains the most fundamental information, like basic computer components setup and the date

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Computer Startup

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Presentation Transcript

  1. Computer Startup

  2. Power • Electricity Warms up components • And heads to the CPU

  3. BIOS • Basic Input / Output System chip with it’s programs called. • BIOS runsPOST

  4. CMOS • The CMOS Chip contains the most fundamental information, like basic computer components setup and the date • That is why it needs a battery • CMOS: Complementary Metal Oxide Semiconductor

  5. POST • Power On Self Test • You may hear some drives or other actions as your computer is being tested • More than one beeps indicates a problem with the tested hardware • In some BIOS two beeps is OK

  6. POST • Power On Self Test

  7. POST • BIOS compares memory records with the CPU to ensure they are running right

  8. Bios Actions • Load Device Drivers • Load Interrupt Handlers • For: • Keyboard • Mouse • Hard Drive • Floppy Drive • Etc.

  9. The System Timer is Checked To ensure proper pacing Above – the worlds most flexible clock

  10. Check System Bus • BIOS has CPU Check System Bus to ensure all components are functioning. • From Webopedia.com: • system bus • The bus that connects the CPU to main memory on the motherboard. I/O buses, which connect the CPU with the systems other components, branch off of the system bus. • The system bus is also called the frontside bus, memory bus, local bus, or host bus.

  11. POST tests memory and video

  12. Option to run BIOS • F2 or DEL

  13. Why? • Some settings may need to be set • Hard Drives • You may need to change the boot order • Hard Drive • CD • Write down key settings before changing them!

  14. Cold Boot or Warm Boot • The computer had stored a value in memory to indicate if the computer was simply restarted with a “warm boot”. • Warm boot – BIOS is done. • Cold boot – Continuing…

  15. RAM Test • All Ram Written and Read

  16. All Drives Tested (above are just some useful images of disks and connections)

  17. Operating System Started • This process is the Boot. • BIOS Transfers control to the OS • Can have multiple Operating Systems – Including more than one • Windows • Linux • Etc • OS is on the Hard Drive

  18. Windows Starts • Hardware Gets Recognized by Windows

  19. Further Initialization • Plug and Play • Drivers for PCI (and ISA) • Disk Drives fully initialized • Video Drivers Loaded • Services Added, such as disk defrag and partition

  20. Logon

  21. There you go!

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