# RetroAssembly custom cores

Scripts for build upstream files for [RetroAssembly](https://github.com/arianrhodsandlot/retroassembly).

## Usage
Our work contains three steps:
1. Compile RetroArch cores with Emscripten following instructions indroduced here: [RetroArch Web Player](https://github.com/libretro/RetroArch/blob/master/pkg/emscripten/README.md).
2. Archive the wasm and js files.

By running `make` the above steps will automatically run sequentially.

Then all RetroArch cores will be built and archived in zip format. All artifacts will be put inside a `dist` directory.

In addition, RetroArch cores will be uploaded to [NPM](https://www.npmjs.com/package/retroassembly-vendors) for further usage in Retro Assembly via [jsDelivr](https://www.jsdelivr.com), a public CDN service that can delegate access to NPM files.

## Debugging cores
1. Start a static HTTP server at the root of the project. Maybe `python3 -m http.server` is a convenient choice.
2. Visit http://localhost:8000/demo/index.html
3. Select a core and upload a ROM, then the selected RetroArch core will run.

## Credits
- Upstream Emulators:
  - [a5200](https://github.com/libretro/a5200) Emulator for Atari 5200.
  - [FBNeo](https://github.com/libretro/FBNeo) Emulator for arcades.
  - [Mupen64Plus-Next](https://github.com/libretro/mupen64plus-libretro-nx) Emulator for Nintendo 64.
  - [prosystem-libretro](https://github.com/libretro/prosystem-libretro) Emulator for Atari 7800.
  - [stella2014-libretro](https://github.com/libretro/stella2014-libretro) Emulator for Atari 2600.
- [RetroArch](https://github.com/libretro/retroarch) We mainly rely on the fantastic work done by them.
- [Emscripten](https://github.com/emscripten-core/emscripten) Without which we could not run native codes inside browsers.
- [webretro](https://github.com/BinBashBanana/webretro) Parts of our patches made on RetroArch is adapted from here.
- [RetroArch patched by EmulatorJS maintainer](https://github.com/EmulatorJS/retroarch) Parts of our patches made on RetroArch is adapted from here.

## License
GPL-3.0