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BIOS: Things you need to know; workings and usage.

BIOS
The Basic Input Output System, usually referred to as BIOS, is software stored on a small memory chip on the motherboard.

BIOS is sometimes incorrectly referred to as the Basic Integrated Operating System.

What is BIOS?
The expansion of BIOS is " Basic Input Output System", which is found inside each and every PC around the world, This universal program stored on a small memory chip on the motherboard basically controls the computer operations including operating system, hard drives, video cards, keyboards, mouse, printers, and other such devices you connect to your computer.
Every time we boot up the PC, the BIOS determines who should do what. For example, how much RAM the PC should use, which hard drive should boot up first, and more. Invented by IBM, BIOS also lets you test hardware, load bootloaders and install OS.

Accessing BIOS.
There is no common way to access BIOS from your PC. The way you enter BIOS depends on PC's motherboard manufacturer and involves holding multiple keys during boot up.
If you carefully observe the screen while booting and pressing and holding the designated button will bring you into the BIOS settings. Once you enter BIOS, you can change boot options, and assign functions to different hardware.

How to Use BIOS.
BIOS contains a number of hardware configuration options that can be changed through the setup utility. Saving these changes and restarting the computer applies the changes to the BIOS and alters the way BIOS instructs the hardware to function.
Here are some common things you can do in most BIOS systems:

  • Change the Boot Order
  • Load BIOS Setup Defaults
  • Remove a BIOS Password
  • Create a BIOS Password
  • Change the Date and Time
  • Change Floppy Drive Settings
  • Change Hard Drive Settings
  • Change CD/DVD/BD Drive Settings
  • View Amount of Memory Installed
  • Change the Boot Up NumLock Status
  • Enable or Disable the Computer Logo
  • Enable or Disable the Quick Power On Self Test (POST)
  • Enable or Disable the CPU Internal Cache
  • Enable or Disable the Caching of BIOS
  • Change CPU Settings
  • Change Memory Settings
  • Change System Voltages
  • Enable or Disable RAID
  • Enable or Disable Onboard USB
  • Enable or Disable Onboard IEEE1394
  • Enable or Disable Onboard Audio
  • Enable or Disable Onboard Floppy Controller
  • Enable or Disable Onboard Serial/Parallel Ports
  • Enable or Disable ACPI
  • Change the ACPI Suspend Type
  • Change the Power Button Function
  • Change Power-on Settings
  • Change Which Display is Initialized First on Multi-Display Setups
  • Reset Extended System Configuration Data (ESCD)
  • Enable or Disable BIOS Control of System Resources
  • Change Fan Speed Settings
  • View CPU and System Temperatures
  • View Fan Speeds
  • View System Voltages





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