# gbdk-2020/gbdk-2020

An updated version of GBDK, C compiler, assembler, linker and set of libraries for the Nintendo Gameboy, Nintendo Entertainment System, Sega Master System, Sega Game Gear.

Repository: https://github.com/gbdk-2020/gbdk-2020
Canonical: https://ross.abutalabs.com/products/gbdk-2020
Language: C
License: NOASSERTION
License Family: other
Topics: gameboy, sdcc, gbdk
Last push: 2026-08-24T18:11:13+00:00

## Health v2 (maintenance only)
Score: 75/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 31, longevity 100
- inputs: {"age_days": 2342, "days_push": 9, "days_rel": 249, "gap_med": 222, "n_releases_24m": 2}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2285, forks 146 (observed 2026-08-28T04:06:34.050912+00:00)

## What it is
GBDK-2020 is a cross-platform development kit for retro gaming consoles including the Nintendo Game Boy, NES, and Sega Master System/Game Gear. It bundles the SDCC C compiler suite with an assembler, linker, and console-specific libraries for writing games in C.

## Use cases
- write a gameboy game in c
- develop homebrew games for the nes
- create sega master system roms
- compile c code for game boy color
- make a game gear homebrew
- build retro console games with sdcc
- develop for mega duck handheld

## When to choose
- you want to write retro console games in C instead of assembly
- targeting Game Boy, Game Boy Color, NES, or Sega 8-bit consoles
- you need a complete toolchain with libraries and build utilities included

## When to avoid
- developing for modern consoles or general-purpose platforms
- you need a full game engine with high-level features rather than a low-level toolchain
- targeting consoles outside the supported sm83/z80/6502 list

## Facets
- artifact type: framework
- maturity: active
- function: compiler, sdk, developer-tools, graphics, game-engine
- domain: embedded-systems, cross-platform, developer-tools
- platform: windows, cross-platform, embedded
- tags: gameboy, nes, sega-master-system, game-gear, sdcc, retro-gaming, homebrew, c-compiler, 8-bit-consoles, game-development, linux, macos

## Member repositories
- gbdk-2020/gbdk-2020 (main) score 75

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:34.050912+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 2026-08-30T02:41:04.318570+00:00, confidence not recorded.
  - readme: https://github.com/gbdk-2020/gbdk-2020 (fetched 2026-08-28T04:06:34.050912+00:00, sha b90afe2da8e0)
- Data as of 2026-08-30T08:39:29.467469+00:00.