# ayoubfaouzi/cpu-internals

Intel / AMD CPU Internals

Repository: https://github.com/ayoubfaouzi/cpu-internals
Canonical: https://ross.abutalabs.com/products/cpu-internals
Language: C
License Family: other
Topics: hypervisor, hardware-virtualization, vt-x, ept, paging, segmentation
Last push: 2026-06-24T16:13:42+00:00

## Health v2 (maintenance only)
Score: 72/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 89, release rhythm 35, longevity 100
- inputs: {"age_days": 3285, "days_push": 70, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1206, forks 189 (observed 2026-08-28T04:03:59.302230+00:00)

## What it is
A curated set of condensed notes summarizing key chapters of the Intel Software Developer's Manual covering CPU architecture, system programming, and hardware virtualization. It serves as a shorter reference for developers learning OS internals, hypervisor development, or x86-64 system programming.

## Use cases
- learn x86-64 CPU internals without reading the full Intel SDM
- study paging and segmentation for OS development
- understand VT-x and EPT before writing a hypervisor
- quick reference for protected mode and long mode details
- prepare for systems programming interviews on CPU architecture
- review VMX control structures and VM-exit behavior

## When to choose
- you want condensed, digestible notes on Intel CPU architecture and virtualization
- you are learning OS internals, system programming, or hypervisor development
- you need a quick reference for paging, segmentation, or VMX topics

## When to avoid
- you need the complete, authoritative Intel SDM or AMD manuals
- you want executable code or a working hypervisor implementation
- you need ARM or other non-x86 architecture documentation

## Facets
- artifact type: learning-resource
- maturity: active
- function: documentation, developer-tools
- domain: operating-systems, hardware, tutorials
- platform: cross-platform
- tags: cpu-architecture, intel-sdm, amd, virtualization, vt-x, ept, paging, segmentation, system-programming, os-internals, hypervisor, notes, x86-64, protected-mode, vmx

## Member repositories
- ayoubfaouzi/cpu-internals (main) score 72

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:59.302230+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:19:16.817654+00:00, confidence not recorded.
  - readme: https://github.com/ayoubfaouzi/cpu-internals (fetched 2026-08-28T04:03:59.302230+00:00, sha ba20424f8e1e)
- Data as of 2026-08-30T08:39:29.467469+00:00.