The word BIOS means the basic input output system and has other names such as System BIOS, ROM BIOS and PC BIOS. BIOS. Is much more than his name suggests. It is a major component that the operating system can not work properly without.
Since the days of DOS (Disk Operating System), the BIOS was present (even before Dos created by Microsoft we know well). Although you do not see BIOS frequently, it is important that your computer works properly.
Since the days of DOS (Disk Operating System), the BIOS was present (even before Dos created by Microsoft we know well). Although you do not see BIOS frequently, it is important that your computer works properly.
What exactly is the BIOS?
The BIOS is a static program, in short. The chip is stored on a portion of the computer's motherboard and is basically a set of instructions that work to help load the operating system. You will fail to load the operating system, if there is no BIOS in your system!
You can see BIOS instructions every time you turn on the computer. There are these instructions in order to check if there are any errors in the processor or RAM for your computer before booting the system.
Some BIOS functions are:
Checks every part of RAM to make sure that everything works fine.
Once the RAM and processor is checked, it checks all other devices connected to the computer such as the keyboard and mouse.
After that, the BIOS checks boot options or boot.
Different boot options are organized sequentially in order of priority. You can actually take a look at this by going to BZO during boot. Options look like: boot from CD, take off from USB, etc.
It then checks for bootstraps on different machines in the specified order.
Once all of the above conditions are completed, it passes the control to the operating system by loading the main parts of the operating system into the RAM portion that is reserved for the operating system.
This is not a complete list of BIOS functions but there are some other things that it does. The BIOS also checks for CMOS, and other different chipsets to set the date and time on the computer, as well as loading the device drivers into the system memory.
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