CMOS-memory and BIOS

CMOS-memory – a kind of computer memory that contains the most important information for it, for example, the current date and time, the user’s password (if, of course, is set), and similar data. CMOS-memory is a semi-permanent, because data storage is carried out even when the computer is turned off. This is possible thanks to a special computer motherboard battery.



Writing and reading information CMOS-memory is performed by teams BIOS. BIOS – this is also the memory, but the other – constant. All information is stored in it during manufacture, and can be stored there an infinite amount of time, regardless of whether the computer is on or off.

That’s basic input/output system information (so decode BIOS) includes all the basic settings of your computer and launches all programs and computer systems after pressing the power button, while spending their diagnosis. Incidentally, in the case of an error the system will notify the user with a special sound signal, so you can find what they are.

Each model has its own PC BIOS, focused precisely on this particular hardware implementation, so it can vary even in the same type of computers.