# s-macke/jor1k

Online OR1K Emulator running Linux

Repository: https://github.com/s-macke/jor1k
Canonical: https://ross.abutalabs.com/products/jor1k
Homepage: http://jor1k.com
Language: JavaScript
License: BSD-2-Clause
License Family: permissive
Topics: emulator, openrisc, javascript, linux
Last push: 2025-11-01T14:53:27+00:00

## Health v2 (maintenance only)
Score: 55/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 50, release rhythm 35, longevity 100
- inputs: {"age_days": 4990, "days_push": 305, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1799, forks 215 (observed 2026-08-28T04:05:37.882371+00:00)

## What it is
jor1k is an OpenRISC 1000 (and RISC-V) CPU emulator written in JavaScript that boots and runs Linux entirely in a web browser. It supports features like SMP multi-core emulation and is used in interactive demos such as editing, compiling, and running C code online.

## Use cases
- run linux in the browser without installing anything
- emulate openrisc 1000 cpu in javascript
- edit compile and run c code online in a browser vm
- demo symmetric multiprocessing with multiple emulated cores
- teach operating systems and systems programming with a browser-based vm
- try rtems real-time operating system in a browser
- test a risc-v cpu implementation in the browser

## When to choose
- you need a zero-install browser-based linux environment for teaching or demos
- you want to experiment with OpenRISC or RISC-V emulation without native tooling
- you want to embed a runnable VM in a web page or educational course

## When to avoid
- you need high-performance or cycle-accurate emulation for real hardware work
- you need to run modern x86/ARM software or full desktop distributions
- you need a maintained general-purpose virtualization solution

## Facets
- artifact type: library
- maturity: maintenance
- function: simulation, interpreter
- domain: operating-systems, developer-tools, education, hardware
- platform: browser
- tags: emulator, openrisc, risc-v, cpu-emulation, linux, javascript, virtual-machine, smp, web-server

## Member repositories
- s-macke/jor1k (main) score 55

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:37.882371+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 2026-08-30T03:22:18.013768+00:00, confidence not recorded.
  - readme: https://github.com/s-macke/jor1k (fetched 2026-08-28T04:05:37.882371+00:00, sha ffa3b3e91156)
  - homepage: http://jor1k.com (fetched 2026-08-29T11:01:31.044857+00:00, sha d92569defef2)
- Data as of 2026-08-30T08:39:29.467469+00:00.