Hi, everyone and welcome to the camp Tia A plus 2 to +0-1001 Marshal one
lesson one dot for explaining bios in the U. E. F I
Overview of the BIOS basic input output system. I'm your instructor, Bill Price
Learning objectives for this lesson is to understand what the bio si is.
I understand the rose of the bios
understand the new BIOS which is called Yueh Fei in its rose and finally understand the See Mose and we're gonna talk about this the most battery.
So let's go and get started
the basic input output system or by us
before the operating system loads in your computer. The system runs what is called the basic input output system.
Even if there were no hardware or operating system installed on your computer, bios was still run.
Bios, in fact, is actually what starts the computer.
Now. We've learned from our previous lessons that the first part of BIOS has caught post the power on self test post, goes out and checks the motherboard to make sure all the hardware connected to it is in good working order.
And we know from a previous lesson again if it does not find everything in a good working order or something is not working correctly or the way should work. Post would either give a visual text message air message
on the display screen after the video card initialize is or issue a series of beat codes.
Now, after everything runs correctly and boots up the way it should.
The next step bios looks for what is called the boot loader
in that boot loader, which had hands the startup process over to the operating system on your computer, and that system will be in load
now. Bios itself resides on a chip on your motherboard. Now this is gonna different. Vary between mother board manufacturers. You can check your mother board manufacturers manner for the exact location of the BIOS chip on your motherboard.
Now, this is one of the older motherboards that I have in my lab, and you see, I've indicated in the bottom right hand corner the exact location of the BIOS chip there.
Now the BIOS is, or we call it now the traditional, or legacy bios
that has been around for over 25 years.
Older systems talk through the BIOS to the hardware
and also BIOS had limited support or limited hardware support.
Some devices were not even initialized, or some devices were not even detected by the bios.
Like the nick card, for example, the BIOS could not detect if the Nick Carr was functioning or nonfunctioning, so this is a big limitation of the traditional legacy. Bios,
bios, settings and changes had to be saved somewhere. These changes in settings were saved to a type of memory card. The Compliment. Terry Metal Oxides Semiconductor, or Simoes.
Now Simone's had to have a power source to store the settings, so that was a big disadvantage. If the sea most lost that power source, it will lose the settings.
So let's talk about the new BIOS, which is called You E F I.
The U F I stands for the unified extensible firmware interface Yueh Fei has. That's us new standard.
It's based on entails e f I extensible firmware interface.
The new Yueh Fei has been replacing bios, and the newer systems has been manufactured, and eventually the legs. The BIOS will be no longer in use.
Now there's many features and benefits to the new U E F I, which gives it a lot of advantages over the old traditional legacy. Biles.
Now let's talk about the advantages of the U. F I.
The U F I firm. Where can boot from drives
up to 2.2 terabytes and larger? The theoretical limit is 9.40 bites.
Yueh Fei supports a secure boot, which means the operating system can be checked for validity to ensure no malware has tampered with the boot process. This is before Lois, so that's a great security feature right there.
Yueh Fei has a pre boot environment, has its own show drivers, and it can browse the Internet to download drivers and could do foul transfers. It also has remote diagnostics, all without the help of additional operating system
changes to the U. F O. U E F I R ST to flash memory.
It does not need to be saved to see most, which is a great advantage.
Let's talk about the seamless battery
in systems with the Legacy bios. Settings were saved to the sea Moe's so a constant power source was needed to maintain the configuration.
The sea Most battery maintained that constant power to make sure no settings were lost.
If the sea most battery power was lost, then all your settings were lost.
And again remember the sea Mose had to have a constant source of power to keep your memory settings of all the changes that you made, passwords or whatever.
In fact, if the vials had a password for security reasons, simply removing the *** is better. What clear those settings back to default? You can see what I'm a big security risk that waas
in newer systems with the U. F I the sea most battery simply keeps the date time because there's no need because again and you'II f i all the changes are saved to flash memory.
let's review what we talked about.
We defined and talked about. What was the bios? We discussed the role of the bios in a system.
We discussed the U F I in its rose
and re re review the see Mose in the sea. Most battery.
All right, that was a great Lessing. A lot of great things to go over and talk about
and we're gonna move over to the next lesson. I will see you then. Thanks for joining