Write your own Operating System
In this video, we discuss the UEFI Boot-method, compared to MBR/BIOS Booting.
Also we transform an MBR-Setup into an UEFI-Setup (which can also be used to repair a broken bootloader)
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13 thoughts on “UEFI vs MBR Booting”
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Awesome, about time I got booted right!
I love the introduction!
It all starts with a "Hello, World!"
@27:07: '/sev/sda' as part of grub-install. Shouldn't that be '/dev/sda'?
amount of knowledge this guy have is 🔥🔥. Recommended
Hi,
Thanks a lot, that was insightful.
you made a typo 'sev' instead of 'dev', check when you blind-typing…
Isnt the GPT partition table the second sector and not the first? @07:45
At least I'm sure that its the case in Windows, where the first sector doesn't really matter, and the second sector is the GPT table that sarts with "EFI PART" Magic string.
Great video, thank you!
You have more knowledge in just one neuron than most people have in their entire brain. Thank for this wonderfully instructive video. I learned so much.
Cool t-shirt
One little caveat, the GPT partition table is actually stored on the sectors directly after the first instead of sector 0. This allows for UEFI systems to be backwards compatible with MBR. Other than that, excellent video! I’ve been looking everywhere for an explanation as good as this.
UEFI actually makes writing your own OS much easier because it provides a lot of services, doesn't have any size limitations, and it can switch CPU in 32 or 64 bit mode before invoking your code, so you won't have to mess with that yourself.