The BIOS software has most important role is to load the operating system. Such as When you turn on your computer and the microprocessor tries to execute its first instruction, it has to get that instruction from somewhere. The BIOS provides those instructions. The other common tasks that the BIOS performs include:
A power-on self-test (POST) for all of the different hardware components in the system to make sure everything is working properly
Activating other BIOS chips on different cards installed in the computer - For example, SCSI and graphics cards often have their own BIOS chips.
Providing a set of low-level routines that the operating system uses to interface to different hardware devices - It is these routines that give the BIOS its name. They manage things like the keyboard, the screen, and the serial and parallel ports, especially when the computer is booting.
Managing a collection of settings for the hard disks, clock, etc.
The BIOS software has most important role is to load the operating system. Such as When you turn on your computer and the microprocessor tries to execute its first instruction, it has to get that instruction from somewhere. The BIOS provides those instructions. The other common tasks that the BIOS performs include:
A power-on self-test (POST) for all of the different hardware components in the system to make sure everything is working properly
Activating other BIOS chips on different cards installed in the computer - For example, SCSI and graphics cards often have their own BIOS chips.
Providing a set of low-level routines that the operating system uses to interface to different hardware devices - It is these routines that give the BIOS its name. They manage things like the keyboard, the screen, and the serial and parallel ports, especially when the computer is booting.
Managing a collection of settings for the hard disks, clock, etc.
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