BIOS

This page describes the BIOS, one of two methods for finding and loading a boot loader. The other, method is the UEFI which is the newer method of accomplishing the same thing.

BIOS stands for Basic Input Output System. It is the only piece of software that is stored in non-volitile memory. That means that the contents of memory are not lost even when the power has been turned off and then on. Thus it is available for execution as soon as the CPU has finished its power-on reset.

The BIOS is divided into four components:

Next: Power On Self Test (POST)

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