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To access the BIOS setup, perform the following steps:.It also permits users to make changes to the BIOS itself.

It permits users to set simple system settings such as time, date, disk drive settings, and boot sequence and so on. The Standard CMOS features is perhaps the most commonly used area in a BIOS. The BIOS has a number of settings that can be changed as required.POST is executed to ensure that all the hardware components, both internal and external, are functioning properly. It is also known as the pre-boot sequence. This test is initiated by the BIOS when a computer is switched on. It also handles the settings for various internal components such as the hard drive and system clock.Īnother important task the BIOS performs is the Power-On-Self-Test (POST). The BIOS provides for communication between the operating system and the various peripherals connected to it such as the keyboard, monitor, printer and so on. When a computer is first turned on, it sends out instructions to the microprocessor as to what it has to do to load the operating system stored on the hard drive. The computer would not be able to function without the assistance of the BIOS. Nowadays computers have the BIOS stored on flash memory chips, which allows the BIOS to be updated at any time. As it is stored in a ROM chip, its contents can never be erased and can be accessed by the computer at all times. It is usually stored in a Read Only Memory (ROM) chip. The Basic Input Output system (BIOS) is a type of software that provides an interface between the hardware components of a computer and its operating system.