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57 lines
5.0 KiB
Markdown
57 lines
5.0 KiB
Markdown
# SameBoy
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SameBoy is an open source Game Boy (DMG) and Game Boy Color (CGB) emulator, written in portable C. It has a native Cocoa frontend for macOS, an SDL frontend for other operating systems, and a libretro core. It also includes a text-based debugger with an expression evaluator. Visit [the website](https://sameboy.github.io/).
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## Features
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Features common to both Cocoa and SDL versions:
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* Supports Game Boy (DMG) and Game Boy Color (CGB) emulation
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* Lets you choose the model you want to emulate regardless of ROM
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* High quality 96KHz audio
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* Battery save support
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* Save states
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* Includes open source DMG and CGB boot ROMs:
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* Complete support for (and documentation of) *all* game-specific palettes in the CGB boot ROM, for accurate emulation of Game Boy games on a Game Boy Color
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* Supports manual palette selection with key combinations, with 4 additional new palettes (A + B + direction)
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* Supports palette selection in a CGB game, forcing it to run in 'paletted' DMG mode, if ROM allows doing so.
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* Support for games with a non-Nintendo logo in the header
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* No long animation in the DMG boot
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* Advanced text-based debugger with an expression evaluator, disassembler, conditional breakpoints, conditional watchpoints, backtracing and other features
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* Extremely high accuracy
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* Emulates [PCM_12 and PCM_34 registers](https://github.com/LIJI32/GBVisualizer)
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* T-cycle accurate emulation of LCD timing effects, supporting the Demotronic trick, Prehistorik Man, [GBVideoPlayer](https://github.com/LIJI32/GBVideoPlayer) and other tech demos
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* Real time clock emulation
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* Retina/High DPI display support, allowing a wider range of scaling factors without artifacts
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* Optional frame blending (Requires OpenGL 3.2 or later)
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* Several [scaling algorithms](https://sameboy.github.io/scaling/) (Including exclusive algorithms like OmniScale and Anti-aliased Scale2x; Requires OpenGL 3.2 or later or Metal)
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Features currently supported only with the Cocoa version:
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* Native Cocoa interface, with support for all system-wide features, such as drag-and-drop and smart titlebars
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* Game Boy Camera support
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[Read more](https://sameboy.github.io/features/).
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## Compatibility
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SameBoy passes all of [blargg's test ROMs](http://gbdev.gg8.se/wiki/articles/Test_ROMs#Blargg.27s_tests), all of [mooneye-gb's](https://github.com/Gekkio/mooneye-gb) tests (Some tests require the original boot ROMs), and all of [Wilbert Pol's tests](https://github.com/wilbertpol/mooneye-gb/tree/master/tests/acceptance). SameBoy should work with most games and demos, please [report](https://github.com/LIJI32/SameBoy/issues/new) any broken ROM. The latest results for SameBoy's automatic tester are available [here](https://sameboy.github.io/automation/).
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## Contributing
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SameBoy is an open-source project licensed under the MIT license, and you're welcome to contribute by creating issues, implementing new features, improving emulation accuracy and fixing existing open issues. You can read the [contribution guidelines](CONTRIBUTING.md) to make sure your contributions are as effective as possible.
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## Compilation
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SameBoy requires the following tools and libraries to build:
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* clang (Recommended; required for macOS) or GCC
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* make
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* macOS Cocoa port: macOS SDK and Xcode (For command line tools and ibtool)
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* SDL port: libsdl2
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* [rgbds](https://github.com/gbdev/rgbds/releases/), for boot ROM compilation
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On Windows, SameBoy also requires:
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* Visual Studio (For headers, etc.)
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* [GnuWin](http://gnuwin32.sourceforge.net/)
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* Running vcvars32 before running make. Make sure all required tools and libraries are in %PATH% and %lib%, respectively. (see [Build FAQ](https://github.com/LIJI32/SameBoy/blob/master/build-faq.md) for more details on Windows compilation)
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To compile, simply run `make`. The targets are `cocoa` (Default for macOS), `sdl` (Default for everything else), `libretro`, `bootroms` and `tester`. You may also specify `CONF=debug` (default), `CONF=release`, `CONF=native_release` or `CONF=fat_release` to control optimization, symbols and multi-architectures. `native_release` is faster than `release`, but is optimized to the host's CPU and therefore is not portable. `fat_release` is exclusive to macOS and builds x86-64 and ARM64 fat binaries; this requires using a recent enough `clang` and macOS SDK using `xcode-select`, or setting them explicitly with `CC=` and `SYSROOT=`, respectively. All other configurations will build to your host architecture. You may set `BOOTROMS_DIR=...` to a directory containing precompiled boot ROM files, otherwise the build system will compile and use SameBoy's own boot ROMs.
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By default, the SDL port will look for resource files with a path relative to executable. If you are packaging SameBoy, you may wish to override this by setting the `DATA_DIR` variable during compilation to the target path of the directory containing all files (apart from the executable, that's not necessary) from the `build/bin/SDL` directory in the source tree. Make sure the variable ends with a `/` character.
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SameBoy is compiled and tested on macOS and Ubuntu.
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