Current release for Windows: WINDOWS Binaries

Current release for MacOS: MacOS Binaries

Current release for Linux: Linux Binaries

You don't need the sources, unless you wish to compile GBDK-2020 yourself. Download the current release binaries using the links above.

Upgrading to a new version? Check the Migration notes.

Docs

Online documentation is avaliable HERE

A good place to start is the Getting Started Section.

Check the Links and Third-Party Tools Section for a list of recommended emulators, graphics tools, music drivers and more.

gbdk-2020

GBDK is a cross-platform development kit for sm83 and z80 based consoles. It includes libraries, toolchain utilities and the SDCC C compiler suite.

See the Supported Consoles & Cross Compiling documentation for more details.

Supported Consoles:

• Nintendo Gameboy
• Analogue Pocket
• Sega Master System & Game Gear

Current status

• Updated CRT and library that suits better for game development
• SDCC Versions
  • GBDK-2020 4.0.5 requires SDCC patches for z80 SMS/Game Gear support. So SDCC nightlies/snapshot builds cannot be used if you want to target SMS/Game Gear. Instead use the Patched SDCC Builds.
  • In addition, recent SDCC nightlies/snapshot builds have switched to a new calling convention which is not well tested with GBDK-2020 and there may be bugs. It's recommended to not use versions after build #12539 at this time.
• The compiler driver lcc supports the latest sdcc toolchain.

For full list of changes see the ChangeLog file

Origin

Over the years people have been complaining about all the issues caused by a very old version of SDCC (the compiler). This is a proper attempt of updating it while also keeping all the old functionallity working, like support for banked code and data and so on

The last version in the OLD repo is 2.96 although releases are available until 2.95-3. Version 2.96 is the starting point of this repo

Usage

Most users will only need to download and unzip the latest release

Then go to the examples folder and build them (with compile.bat on windows or running make). They are a good starting point.

Discord servers

• gbdk/zgb Discord - For help with using GBDK (and ZGB), discussion and development of gbdk-2020

• gbdev Discord - There is a #gbdk channel and also people with a lot of Game Boy development knowledge

• SMS Power! Discord - Additional SMS & Game Gear discussion and resources.

Forums

• The Game Boy Development Forum - A good place to search for Game Boy related answers.
• SMS Power! Forum - Additional SMS & Game Gear discussion and resources.

For SDCC you can check its website and the manual

Build instructions

Unless you are interested on recompiling the sources for some reason (like fixing some bugs) you don't need to build GBDK

• Windows only: Download and install mingw
• Clone, download this repo or just get the source form the releases
• Download and install the PATCHED sdcc builds from the separate repo for that (https://github.com/gbdk-2020/gbdk-2020-sdcc/releases/tag/sdcc-12539-patched).
• On Linux don't use package managers The latest release available won't work, you need to compile or download one of the nightlies
• Create SDCCDIR environment variable, that points into the folder, where you installed sdcc
• Open command prompt or a terminal, go to the root directory of the repo and run make