# jserv/mini-arm-os

Build a minimal multi-tasking OS kernel for ARM from scratch

Repository: https://github.com/jserv/mini-arm-os
Canonical: https://ross.abutalabs.com/products/mini-arm-os
Language: C
License: NOASSERTION
License Family: other
Last push: 2025-12-14T15:44:05+00:00

## Health v2 (maintenance only)
Score: 58/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 57, release rhythm 35, longevity 100
- inputs: {"age_days": 4270, "days_push": 262, "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 1255, forks 256 (observed 2026-08-28T04:04:08.904689+00:00)

## What it is
A step-by-step educational project that builds a minimal multi-tasking OS kernel for ARM Cortex-M from scratch in C. It progresses from semihosted Hello World through context switching, system calls, and preemptive scheduling, targeting both QEMU (STM32 emulation) and real STM32F429i-Discovery hardware.

## Use cases
- learn how to write an OS kernel for ARM from scratch
- understand context switching and system calls on Cortex-M
- study preemptive scheduling and SysTick timer interrupts
- run a minimal multitasking kernel on STM32 in QEMU
- teach embedded systems and kernel internals with hands-on exercises
- port a tiny kernel to real STM32F429i-Discovery hardware

## When to choose
- you want a guided, incremental tutorial on bare-metal ARM kernel development
- you need a tiny reference implementation of context switching and preemptive scheduling on Cortex-M
- you are teaching or self-studying embedded OS fundamentals with QEMU or STM32 hardware

## When to avoid
- you need a production-ready RTOS with drivers, networking, or file systems
- you target non-ARM or application-processor-class hardware
- you want a supported kernel with long-term maintenance and a clear license

## Facets
- artifact type: learning-resource
- maturity: active
- function: embedded, concurrency
- domain: embedded-systems, operating-systems, education, tutorials
- platform: embedded, cross-platform
- tags: arm-cortex-m, stm32, bare-metal, multitasking, context-switching, preemptive-scheduling, qemu-emulation, educational-kernel, scheduler, operating-system-kernel, arm, qemu, linux

## Member repositories
- jserv/mini-arm-os (main) score 58

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:08.904689+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 2026-08-30T05:07:20.080204+00:00, confidence not recorded.
  - readme: https://github.com/jserv/mini-arm-os (fetched 2026-08-28T04:04:08.904689+00:00, sha c7d4596fa7ed)
- Data as of 2026-08-30T08:39:29.467469+00:00.