The difference between CMOS and BIOS

admin

hi all members
In this lecture we will explain the difference between CMOS and BIOS
What is the difference between CMOS and BIOS?
CMOS is a readable and writable RAM chip on the mainboard of the microcomputer, which is used to save the hardware configuration of the current system and the settings of certain parameters by the user. CMOS RAM itself is just a piece of memory, and only has the function of data saving, and the setting of various parameters in CMOS must go through a special program. Since the manufacturer has implemented the CMOS setting program into the BIOS chip, the user can enter the CMOS setting program to conveniently set the system by pressing a specific button when the machine is turned on, so the CMOS setting is also called BIOS setting.

So what is the difference between CMOS and BIOS?

!guest!!post_hide_reply_hidden!

When the computer is powered on, one of the functions of the BIOS is to check the internal devices. The self-check includes CPU, 640K basic memory, more than 1M extended memory, ROM, motherboard, CMOS memory, serial and parallel ports, and display cards. , Soft disk subsystem and keyboard test. If a problem is found during the self-check, the system will give a prompt message or sound the horn to warn. After the self-test is completed, the ROM BIOS will search for valid boot drives such as floppy hard drives, CDROMs, and network servers according to the boot sequence in the CMOS settings, read the operating system boot record, and then hand over the system control to the boot record. The recording completes the startup of the system.