SameBoy/README.md

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# SameBoy
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SameBoy is an open source Gameboy (DMG) and Gameboy Color (CGB) emulator, written in portable C. It has a native Cocoa frontend for OS X, an experimental 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
Features common to both Cocoa and SDL versions:
* Supports Gameboy (DMG) and Gameboy Color (CGB) emulation
* Lets you choose the model you want to emulate regardless of ROM
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* High quality 96KHz audio
* Battery save support
* Save states
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* Includes open source DMG and CGB boot ROMs:
* Complete support for (and documentation of) *all* game-specific palettes in the CGB boot ROM, for accurate emulation of Gameboy games on a Gameboy Color
* Supports manual palette selection with key combinations, with 4 additional new palettes (A + B + direction)
* Supports palette selection in a CGB game, forcing it to run in 'paletted' DMG mode, if ROM allows doing so.
* Support for games with a non-Nintendo logo in the header
* 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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* Emulates [PCM_12 and PCM_34 registers](https://github.com/LIJI32/GBVisualizer)
* Emulates LCD timing effects, supporting the Demotronic trick, [GBVideoPlayer](https://github.com/LIJI32/GBVideoPlayer) and other tech demos
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* Extermely high accuracy
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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
* Optional frame blending (Requires OpenGL 3.2 or later)
* Several [scaling algorithms](https://sameboy.github.io/scaling/) (Including exclusive algorithms like OmniScale and Anti-aliased Scale2x; Requires OpenGL 3.2 or later)
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Features currently supported only with the Cocoa version:
* Native Cocoa interface, with support for all system-wide features, such as drag-and-drop and smart titlebars
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* GameBoy Camera support
[Read more](https://sameboy.github.io/features/).
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## Compatibility
SameBoy passes many of [blargg's test ROMs](http://gbdev.gg8.se/wiki/articles/Test_ROMs#Blargg.27s_tests), as well as 77 out of 78 of [mooneye-gb's](https://github.com/Gekkio/mooneye-gb) tests (Some tests require the original boot ROMs). 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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## Compilation
SameBoy requires the following tools and libraries to build:
* clang
* make
* Cocoa port: OS X SDK and Xcode command line tools
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* SDL port: SDL2.framework (OS X) or libsdl2 (Other platforms)
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* [rgbds](https://github.com/bentley/rgbds/releases/), for boot ROM compilation
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On Windows, SameBoy also requires:
* Visual Studio (For headers, etc.)
* [GnuWin](http://gnuwin32.sourceforge.net/)
* Running vcvars32 before running make. Make sure all required tools and libraries are in %PATH% and %lib%, repsectively.
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To compile, simply run `make`. The targets are cocoa (Default for OS X), sdl (Default for everything else), libretro, bootroms and tester. You may also specify CONF=debug (default), CONF=release or CONF=native_release to control optimization and symbols. native_release is faster than release, but is optimized to the host's CPU and therefore is not portable. You may set BOOTROMS_DIR=... to a directory containing precompiled dmg_boot.bin and cgb_boot.bin files, otherwise the build system will compile and use SameBoy's own boot ROMs.
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SameBoy was compiled and tested on macOS, Ubuntu and 32-bit Windows 7.