What is bios?

January 27, 2015
What is bios?

BIOS (Basic Input / Output System) - basic input / output system. After pressing the power button, the computer starts up the BIOS first, and then the operating system is loaded. The boot process of the BIOS lasts less than 1 sec.

Without BIOS, computer operation would not be possible. Why? Consider what BIOS is and what it is for.

BIOS concept

BIOS - a set of instructions (program), recorded on the chip. The BIOS is located directly on the motherboard, connected to the battery for continuous operation. In this regard, the BIOS is a ROM - a permanent storage device that does not depend on external power.

BIOS assignment

  • The BIOS determines where the operating system will boot from and with what parameters the computer will operate. For example, the operating system when installing or booting takes information from the BIOS about the current date and time, about the source of the boot - a hard disk, USB flash drive or other device.
  • In addition, the BIOS includes other parameters that affect the operation of the computer as a whole.For example, it is possible to improve computer performance.
  • It is also important to note that before the OS is loaded, a POST test is performed — a self-test of the computer’s hardware devices. And if there are any mistakes, then before you start working at the computer you can find out about them and try to fix them.

How to get into the BIOS settings

To get into the BIOS settings, you need to press the Del, F1, F2 or ESC key at the time of initialization - depending on your motherboard and BIOS. As a rule, an inscription appears on the screen showing how to enter the BIOS. For example, Press Del to enter SETUP.

It is strongly recommended not to make adjustments in the BIOS, if you are not sure of your actions.