# pervognsen/bitwise

Bitwise is an educational project where we create the software/hardware stack for a computer from scratch.

Repository: https://github.com/pervognsen/bitwise
Canonical: https://ross.abutalabs.com/products/bitwise
Language: C
License: NOASSERTION
License Family: other
Archived: true
Last push: 2019-03-07T09:45:23+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3098, "days_push": 2736, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5256, forks 231 (observed 2026-08-28T04:09:13.763968+00:00)

## What it is
Bitwise is an educational project by Per Vognsen that builds an entire software/hardware stack for a computer from scratch, including HDL compilers, FPGA hardware, kernels, and systems tools, accompanied by videos and articles. The C-based source code is released into the public domain for study and extension.

## Use cases
- learn how compilers and assemblers work from scratch
- understand how CPUs and hardware are designed and simulated
- study how operating system kernels are built
- learn low-level systems programming in C
- follow a guided course on building a computer stack
- learn FPGA and hardware description language basics

## When to choose
- you want to deeply understand how computers work by building one from scratch
- you prefer learning through videos paired with real source code
- you want public-domain example code for compilers, kernels, or HDLs

## When to avoid
- you need production-ready or maintained software
- you want a supported toolchain for real FPGA development
- you need up-to-date content or community support

## Facets
- artifact type: learning-resource
- maturity: abandoned
- function: compiler, interpreter, simulation, developer-tools
- domain: education, compilers, operating-systems, hardware, tutorials
- platform: windows, cross-platform
- tags: educational, fpga, hardware-description-language, systems-programming, from-scratch, video-series, public-domain, linux, macos

## Member repositories
- pervognsen/bitwise (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:13.763968+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 2026-08-29T17:59:32.430734+00:00, confidence not recorded.
  - readme: https://github.com/pervognsen/bitwise (fetched 2026-08-28T04:09:13.763968+00:00, sha 6d4c421bd2ed)
- Data as of 2026-08-30T08:39:29.467469+00:00.