CMOS and BIOS

CMOS is a special type of RAM (it loses its stored content when power is lost)

BIOS is software, is the program!

CMOS is the chip, is the hardware!

In fact we are through the BIOS of this program, to set the parameters of the COMs.

COMs is a chip, inherited on the motherboard, which holds important switch machine parameters, and the preservation of the need for electricity to maintain the amount,

So each motherboard will have a granular button battery, called a CMOS battery.

CMOS storage parameters, to set him up, we need to pass the program bar set the amount of parameters written to the CMOS,

So use the BIOS program to read and write.

What is the BIOS? The BIOS is (basic input/output system, basic input/ output systems abbreviation) in the computer played the most basic and most important role. is the most basic and most important program in the computer. Put the program in a memory (chip) that does not require power, which is what is usually said by the BIOS. It provides the most basic and direct hardware control for the computer, and the original operation of the computer is done in accordance with the contents of the BIOS. To be precise, the BIOS is an interface between the hardware and the software program or a converter, which is responsible for the immediate requirements of the hardware and executes the hardware requirements according to the software. Computer users in the process of using the computer, will be exposed to the BIOS, it plays a very important role in the computer system. 

What is CMOS? CMOS, namely: complementary Metal Oxide semiconductor--complementary Metal oxide semiconductor (intended to refer to complementary metal oxide semiconductor memory, is a large-scale application of IC chip manufacturing raw materials), is a computer motherboard on a read-write memory chip, consisting of a piece of ROM and a piece of RAM, mainly used to save the current system hardware configuration and operators of certain parameters set. CMOS RAM chips are powered by the system through a backup battery, so no CMOS information is lost either in the shutdown State or when the system is out of power.

BIOS and CMOS difference and contact: BIOS is a set of hardware computer programs, stored on the motherboard of a piece of eprom or EEPROM chip, which contains important information on the system and set the system parameters Setup program--bios Setup program. And CMOS is: complementary Metal Oxide semiconductor--complementary Metal oxide Semiconductor, is a motherboard on a read-write RAM chip, used to save the current system hardware configuration and user parameter settings, the content can be read and write through the setup program. The CMOS chip is powered by a button battery on the motherboard, and the parameters are not lost even if the system loses power. CMOS chip only save the function of data, and the parameters of the CMOS changes to be through the BIOS setup program to achieve. BIOS and CMOS are both relevant and different: The System Setup program in the BIOS is the means to complete the CMOS parameter setting, CMOS RAM is both the storage place of the BIOS setting system parameters and the result of the BIOS setting system parameters. Therefore, the complete argument should be "set the CMOS parameters through the BIOS setup program." Since both the BIOS and CMOS are related to the system setup, the fact that the BIOS setup and CMOS settings are created during the actual use is the  same thing, but the BIOS and CMOS are two completely different concepts, Never confuse.

CMOS and BIOS