What Is BIOS ?

The BASIC INPUT /OUTPUT SYSTEM (BIOS), also known as the System Bios, is a de facto standard defining a firmware interface.

               ^{BIOS software is built into the PC, and it is the first code run by a PC when Powered ON Or BOOT FIRMWARE.}

^{The First function of the BIOS is load and start and operating system. The first job for the BIOS is to initialize and identify  system device like video display card, keyboard , mouse, hard disk, cd/dvd and other hardware then executes the software and loads. This process is known as BOOTING}

                

                     ^{BIOS software is stored on a non-volatile ROM chip built into the system on the motherboard.} 

 

           ^{BIOS also have a user interface it is menu system accessed by pressing a certain key on the keyboard when the PC start} 

• configure hardware 
• set the system clock
• enable or disable system components