BASIC INPUT/OUTPUT SYSTEM (BIOS) (WHAT DOES IT DO? (It enumerates the…
BASIC INPUT/OUTPUT SYSTEM (BIOS)
WHAT IS BIOS?
It's BIOS that's responsible for the POST and therefore makes it the very first software to run when a computer is started.
POST, short for Power On Self Test, is the initial set of diagnostic tests performed by the computer right after it's powered on.
The BIOS firmware is non-volatile, meaning that its settings are saved and recoverable even after power has been removed from the device.
BIOS, which stands for Basic Input Output System, is software stored on a small memory chip on the motherboard.
WHAT DOES IT DO?
It enumerates the RAM by checking each compartment to see if all of them are working.
After checking out RAM and Processor, it checks for other devices attached to the computer
It detects all the peripherals, including the keyboard and mouse and then checks for the boot options
Boot options are checked in the sequence configured in your BIOS: Boot from CD-ROM, Boot From Hard Drive, Boot from LAN, etc.
It checks for bootstraps on the devices in the order you or the machine vendor configured the BIOS.
It passes reigns of the computer to the operating system by loading the essential parts of the OS into the random access memory (RAM) reserved for the OS, after bootstrap is located.
HOW TO USE IT ?
BIOS contains a number of hardware configuration options that can be changed through the setup utility. Saving these changes and restarting the computer applies the changes to the BIOS and alters the way BIOS instructs the hardware to function. Here are some common things you can do on most BIOS systems .
changed floppy drive setting
view amount of memory installed
Change the date and time
change hard drive setting
Create a BIOS Password
change cd/dvd/bd drive settings
Remove a BIOS Password
Enable or disable the quick power on self test
load BIOS Setup Defaults
HOW TO ACCESS BIOS
The BIOS is accessed and configured through the BIOS Setup Utility. The BIOS Setup Utility is,for all reasonable purposes, the BIOS itself. All available option in BIOS are configurable via the BIOS Setup Utility.
Unlike an operating system like Windows, which is often downloaded or obtained on a disc, and needs to be installed by the user or manufacturer, BIOS is pre-installed when the computer is purchased
The BIOS Setup Utility is accesed in various ways depending on your computer or motherboard make and model. see How to Access the BIOS Setup Utility for help.
Popular BIOS Manufacturer
American Megatrends (AMI)