The BIOS contains two things: the low level bootstrap code, and simple I/O drivers for the devices built into the motherboard.
Without the low level bootstrap code to initialize the CPU and system hardware there would be no way of loading the high level bootstrap code from disk that will load the OS.
The simple I/O drivers will be used by the low level bootstrap code, the high level bootstrap code, and also initially by the OS (until it installs its own I/O drivers).
Because BIOS had to do with the booting of a computer.
The Del key
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BIOS stands for Basic Input/Output System. It is firmware used to perform hardware initialization during the booting process of a computer and provides runtime services for operating systems and programs.
If it's a desktop computer and you forgot the BIOS power-on password, you can reset the BIOS by closing the "cmos reset" jumper on the motherboard.
The bIOS can be entered by pressing a key during the initial booting of the computer. The exact key can vary depending on the BIOS developer, but is often either F1, F2, Delete, or Esc.
it is the bios ( basic input output system) located in ROM
post, BIOS, The OS takes over, Files are loaded
so you can see a full POST report
Check wheter USB functionality is enabled in the BIOS first
the bios is not a physical thing, it is a piece of software that the computer uses to boot. to get to the bios, press the del key while your computer is booting, and before it gets to the windows loading screen If you are not familiar with building or troubleshooting computers it is best that you do not attempt to change anything in the bios, you could cause your computer to not turn on if you mess with the wrong thing.
Installing XP from BIOS is essentially a CLEAN INSTALL, Booting off the install CD is what initiates this action. At that moment, the only operating system running on the computer is the BIOS. Jeff TechSoEasy http://www.techsoeasy.com/answers.html