# ymir-emu/Ymir

Sega Saturn emulator

Repository: https://github.com/ymir-emu/Ymir
Canonical: https://ross.abutalabs.com/products/ymir
Language: C++
License: GPL-3.0
License Family: copyleft
Topics: cpp, cpp20, emulator, sega-saturn, sega, emulation, freebsd, imgui, linux, macos, sdl3, windows
Last push: 2026-09-03T01:46:28+00:00

## Health v2 (maintenance only)
Score: 83/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 89, longevity 35
- inputs: {"age_days": 493, "days_push": 0, "days_rel": 72, "gap_med": 21, "n_releases_24m": 16}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1034, forks 55 (observed 2026-09-03T02:15:20.784130+00:00)

## What it is
Ymir is a work-in-progress Sega Saturn emulator written in modern C++ with an ImGui-based interface. It runs Saturn games from common disc image formats on Windows, Linux, and macOS, and includes a built-in debugger.

## Use cases
- play Sega Saturn games on my PC
- emulate the Sega Saturn on Linux
- run Saturn disc images like CHD or BIN+CUE
- debug Saturn homebrew development
- play Saturn games on macOS
- use a modern open-source Saturn emulator

## When to choose
- you want to play Saturn games on Windows, Linux, or macOS with a modern actively developed emulator
- you need support for common disc image formats and automatic BIOS/region detection
- you want a built-in debugger for Saturn development or research

## When to avoid
- you need a fully mature emulator with near-perfect compatibility for your entire Saturn library
- you want to emulate consoles other than the Sega Saturn
- you require low-end hardware support, as accurate Saturn emulation is demanding

## Facets
- artifact type: application
- maturity: experimental
- function: simulation, gui, developer-tools
- domain: gaming-tools, cross-platform
- platform: windows
- tags: sega-saturn, emulator, console-emulation, cpp20, sdl3, imgui, retro-gaming, linux, macos, desktop

## Member repositories
- ymir-emu/Ymir (main) score 83

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:20.784130+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 2026-08-30T07:07:30.639050+00:00, confidence not recorded.
  - readme: https://github.com/ymir-emu/Ymir (fetched 2026-09-03T02:15:20.784130+00:00, sha c4da1694c534)
- Data as of 2026-08-30T08:39:29.467469+00:00.