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Intel Software Developer Manual

★★★★☆
x86cpupaginginterruptsprotected-mode
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What It Is

The authoritative reference for the x86 and x86-64 instruction set architecture. Three thick volumes covering everything from instruction encoding to protected mode, paging, memory types, power management, and virtualization extensions.

Which Volumes Matter

  • Vol. 1 — basic architecture, data types, registers. Useful for orientation.
  • Vol. 2 — full instruction reference. Use as a lookup table, not for reading.
  • Vol. 3A — system programming: protected mode, segmentation, paging, task management, IDT, interrupts. This is the one you actually need.
  • Vol. 3B/C — more system programming: APIC, VMX, power management.

How I Use It

Primarily for Vol. 3A when implementing MiniKernel. The paging chapter (Chapter 4) is the ground truth for x86-64 4-level paging — page table formats, CR3 structure, TLB invalidation rules. The interrupt chapter (Chapter 6) is essential for setting up the IDT correctly.

Caveats

  • Massive and dense. Don’t try to read it sequentially.
  • Some sections assume familiarity with older x86 modes you’ll never use (real mode, v8086)
  • Updated frequently — download the latest version; errata matter

Verdict

You can’t write a kernel without it. Bookmark Vol. 3A Chapter 4 (paging) and Chapter 6 (interrupts) first.

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