Basic Input Output System is a low level software that basically tells all the hardware how to communicate. It is independent of the operating system.
The BIOS function in the 8086 microprocessor is called an interrupt function. It is an interrupt function because it is not called by a function call instruction.
The CMOS contains user-defined settings for the BIOS. The Bios is a program that contains hardware instructions on how to start the computer.
Performs a check on all internal components (Leng Heng )
A bootloader is what loads the kernel into RAM and transfers control to it from the BIOS.
The delete key is also used to access bios on some systems.
The function of a bios battery is basically to reset your bios if something goes wrong and you corrupt it. Bios batteries usually contain a little bit of information on them. Therefore, when you remove a bios battery, it goes back to default settings. **Note** removing a bios battery is usually a last resort to reset your bios. There are several other ways to reset your bios such as a jumper cable or (included in some never motherboards,) a reset bios switch.
Boot block (4K,8L,16K,32K,64K128K) is portion of code in the complete BIOS(1MB5MB). who's responsibility is validate the main BIOS and transferring the control to main BIOS (checks whether BIOS corrupted or not and some other properties).
The easier question would be what IS a reason to update. If your software or hardware does not support the functions they were meant to and your BIOS has firmware that can make it function, then this is reason enough to consider flashing yur BIOS. Upgrading BIOS is something you simply don't do on a whim as you could adversely compromise behavior and possibly indirectly damage other hardware.
The Bios
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AMI Bios, Award Bios, Pheonix Bios
On windows? Wrong category. But if it's your computer, just take the battery out of the computer's motherboard and the BIOS will reset leaving no password for the BIOS login. If its a phone then it's not possible.