All about CMOS and BIOS

CMOS is short for Complementary Metal Oxide Semiconductor. CMOS is responsible for storing the date, time, system setup and other small functions. They are used at the start of a boot process in a computer system that is why it requires a small battery on the system board that provides power to the CMOS chip, even while the computer is turned off so it will not loose all data save on it.

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