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Document the Full Power-On Sequence: From PSU to OS

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Implementation

Create a comprehensive documentation file explaining the complete power-on sequence.

Requirements:

Write a detailed explanation of each stage: PSU → CPU → BIOS → Bootloader → OS
Include memory addresses and register values where applicable
Explain why the CPU starts at 0xFFFFFFF0
Describe the difference between BIOS and UEFI
Include timing information for each stage
Add a simple ASCII diagram showing the flow
Save your documentation to boot-sequence.txt
Print confirmation when complete

Why This Matters

Every stage you document here maps to a real component: coreboot and EDK2/TianoCore implement the BIOS/UEFI stage, GRUB and systemd-boot implement the bootloader stage, and `systemd-analyze blame` measures the kernel-init stage on a running Linux box. When a machine hangs before showing a login prompt, engineers diagnose it by figuring out exactly which of these five stages failed.

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