CMOS的原意是互补金属氧化物半导体——一种大规模应用于集成电路芯片制造的原料，它是微机主板上的一块可读写的RAM芯片，用来保存当前系统的硬件配置和用户对某些参数的设定。CMOS可由主板的电池供电，即使系统掉电，信息也不会丢失。CMOSRAM本身只是一块存储器，只有数据保 CMOS is intended to be complementary metal oxide semiconductor - a large-scale application in the manufacture of integrated circuit chips, it is a piece of computer readable and writable RAM chip on the motherboard, used to save the current system hardware configuration and user of a Setting of some parameters CMOS can be powered by the motherboard’s battery, even if the system is powered down, the information will not be lost. CMOSRAM itself is only a piece of memory, only data protection