GitHub - timw4mail/rustid: A CLI Utility for viewing x86 CPU info

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A lightweight CPU identification tool for Windows, Linux, and DOS. rustid queries processor information using the CPUID instruction and maps it to specific microarchitectures and feature sets. There is also some support for ARM and PowerPC cpu detection.

AI Disclaimer:

This application is developed using some AI, mostly related to:

  • DOS Build
  • Assembly code

Features

  • Multi-Architecture Support: Detects CPUs on x86/x86_64, ARM/AArch64, and PowerPC.
  • Vendor & Model Detection: Identifies CPUs from Intel, AMD, Cyrix, VIA, Zhaoxin, Rise, Transmeta, Apple Silicon, Qualcomm, and more.
  • Feature Flag Reporting (x86): Detects support for FPU, MMX, SSE (up to 4.2), AVX, AVX-512, BMI, and others.
  • Cache & Topology Info: Displays cache sizes, associativity, core/thread counts, and socket counts.
  • DOS Compatibility: Compiles to a single binary that can be run on DOS environments (on real hardware 386-class or better, or with DOSBox/DOSBox-X).

Getting Started

Prerequisites

  • Rust (rustup and cargo need to be installed)
  • just - Required to run build scripts. Can be installed with cargo install just.
  • DOSBox-X (optional) - Helpful for development and testing of the DOS version

Building

Standard Build:

Build for DOS:

This produces a rustid.com binary compatible with DOS environments (like DOSBox-X).

Cross-Compilation: For other architectures, see the justfile for available targets (just build-arm64, just build-ppc, etc). Cross-compilation should be considered experimental.

Usage

Simply run the compiled binary to see your CPU details:

Output varies by architecture. Here is an example for x86_64:

---------------------
Rustid version 0.9.0
---------------------

  Architecture: x86_64_v4

        Vendor: AuthenticAMD (AMD)

         Model: AMD Ryzen 9 7950X3D 16-Core Processor

     MicroArch: Zen 4

      Codename: Raphael

  Process Node: 5nm

         Cores: 16 cores (32 threads)

         Cache: L1d: 16x 32 KB, 8-way
                L1i: 16x 32 KB, 8-way
                L2:  16x 1 MB, 8-way
                L3:  96 MB, 16-way

     Frequency: 4.19 GHz

     Signature: Family 19h, Model 61h, Stepping 2h
                (10, 15, 6, 1, 2)

      Features: FPU TSC CMPXCHG8B CMPXCHG16B CMOV MMX HT AMD64 SSE SSE2 SSE3 SSE4A SSE4.1 SSE4.2 SSSE3 AVX AVX2 AVX512F FMA BMI1 BMI2 RDRAND POPCNT F16C

For ARM and PowerPC, the output includes different fields (e.g., brand/implementor, codename, cache per core type).

Information References