How Does Your Computer Actually Turn On? (Boot Process Explained)

Ever wondered what actually happens in those few seconds between pressing
the power button and seeing your desktop? It's not magic — it's a carefully
orchestrated sequence of hardware and software working together.

In this video, we break down the entire boot process from scratch:
What the PSU does when you press power
How the CPU wakes up and where it starts executing
What BIOS is and how it finds your operating system
The 512-byte boot sector — and the magic bytes that make it work

This is Episode 1 of the series "Let's Make custom Bootloader" — where
we go from zero to writing a real x86 bootloader in assembly that transitions
the CPU all the way to 64-bit Long Mode.
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GitHub Repo: https://github.com/nrjlamsal/Bootloader.asm

#bootloader #assembly #operatingsystem #lowlevel #programming #x86 #bios #computerscience

Видео How Does Your Computer Actually Turn On? (Boot Process Explained) канала Niraj Lamsal