FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -BIOS has a Setup utility stored in the BIOS flash memory. The configured data is provided with context-sensitive Help and is stored in the system’s battery-backed CMOS RAM. If the configuration stored in the CMOS RAM is invalid, the BIOS settings default to the original state specified at the factory.

Detailed explanation-2: -The BIOS is the program that starts a computer up, and the CMOS is where the BIOS stores the date, time, and system configuration details it needs to start the computer. The BIOS is a small program that controls the computer from the time it powers on until the time the operating system takes over.

Detailed explanation-3: -Like most RAM chips, the chip that stores your BIOS settings is manufactured using the CMOS process. It holds a small amount of data, usually 256 bytes. The information on the CMOS chip includes types of disk drives are installed, the current date and time of your system clock, and your computer’s boot sequence.

Detailed explanation-4: -What is CMOS? Complementary metal-oxide-semiconductor (CMOS) is a small amount of memory on a computer motherboard that stores the Basic Input/Output System (BIOS) settings. The BIOS is the software stored on the memory chip on the motherboard.

Detailed explanation-5: -Because the settings you make in the BIOS setup program are stored in the nonvolatile RAM of the CMOS chip, the settings are often called CMOS settings.