Stored on the computer motherboard, solidified in the ROM chip.
Basic Input\/Output System (BIOS) : basic input\/output system. It is a set of programs solidified to a ROM chip on the motherboard of the computer, saving the most important basic input and output programs of the computer, post-boot self-test programs and system self-start programs, it can read and write the specific information of the system Settings from the CMOS.
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Second, BIOS is a \"bridge\" connecting software and hardware, is the first program running when the computer is opened, the main function is to provide the computer with the lowest level, the most direct hardware Settings and control. The BIOS has three functions:
self-test and initialization procedures;
program service requirements;
Hardware interrupt processing;
The BIOS is equipped with the important information of the system and the setting program of the system parameters (BIOSSetup program); CMOS is a readable RAM chip on the motherboard, which is loaded with specific parameters about the system configuration, and its content can be read and written through the setting program.
Extended data
The BIOS chip is a read-only chip, commonly called ROM, with a very small capacity, usually only a few megabytes. But this chip determines the level of the motherboard.
The work of the chip requires the motherboard to provide uninterrupted power to ensure the existence of data, so the motherboard is usually equipped with a 2302 battery, usually called BIOS battery or CMOS battery, but the BIOS parameters need to be set through the CMOS program to complete, the set results are eventually stored in the CMOS program.
Usually the BIOS chip is a separate chip on the motherboard, but its associated CMOS programs and stored information are usually placed in the motherboard's Southbridge chip. This is why BIOS programs require uninterrupted power supply to work. In the event of low power or battery failure, all Settings will be returned to the original factory Settings.
The BIOS provides detection for the computer to boot up, so some computer faults can be determined by the display result of the BIOS program detection. BIOS chip The most basic but powerful chip on the computer motherboard, such as the motherboard startup order, voltage adjustment, overclocking, and the working mode of various devices, can be adjusted through its related programs.