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What is BIOS in computers & how does it work?
BIOS:Process Management
PD-18-1/ Kystaubaeva Karlygash
26.02.2019
How BIOS Works?
Definition
program that is made accessible to the microprocessor on an EPROM chip
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manages data flow between the computer's OS and attached devices
program that used to start the computer
third type of software
basic input/output system
BIOS
Common tasks that the BIOS performs include:
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A power-on self-test (POST) for all of the different hardware components in the system to make sure everything is working properly
01.
Activating other BIOS chips on different cards installed in the computer - For example, SCSI and graphics cards often have their own BIOS chips.
02.
03.
Providing a set of low-level routines that the operating system uses to interface to different hardware devices - It is these routines that give the BIOS its name.
04.
Managing a collection of settings for the hard disks, clock, etc.
When you turn on your computer, the BIOS does several things. This is its usual sequence:
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Perform the power-on self-test (POST)
Check the CMOS Setup for custom settings
Display system settings
Load the interrupt handlers and device drivers
Determine which devices are bootable
Initialize registers and power management
Initiate the bootstrap sequence
How BIOS Works?
The processor
The floppy drive and hard drive
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Some details about your system.
Memory
Display
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BIOS revision and date
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press DEL key
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Page Up and Page Down keys are required to change values
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Making Changes to BIOS
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press F10 to save changes and exit
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You have to check the BIOS version first. This can be done by entering BIOS at the time of booting, by pressing DEL.
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How to Update BIOS
Make sure you have power backup while upgrading the BIOS
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IMPORTANT: If your computer is working properly, you do not need to update or flash your BIOS.
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Thank You For A Watching
References
1. https://www.thewindowsclub.com/what-is-bios-in-computers-how-does-it-work
2. https://computer.howstuffworks.com/bios1.htm
3. https://whatis.techtarget.com/definition/BIOS-basic-input-output-system