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SameBoy is an open source Game Boy (DMG) and Game Boy Color (CGB) emulator for Windows and macOS.


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/).


Features common to both Cocoa and SDL versions:

  • Supports Game Boy (DMG) and Game Boy Color (CGB) emulation
  • Lets you choose the model you want to emulate regardless of ROM
  • High quality 96KHz audio
  • Battery save support
  • Save states
  • 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 Game Boy games on a Game Boy 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
  • Advanced text-based debugger with an expression evaluator, disassembler, conditional breakpoints, conditional watchpoints, backtracing and other features
  • Extremely high accuracy
  • Emulates [PCM_12 and PCM_34 registers](https://github.com/LIJI32/GBVisualizer)
  • T-cycle accurate emulation of LCD timing effects, supporting the Demotronic trick, Prehistorik Man, [GBVideoPlayer](https://github.com/LIJI32/GBVideoPlayer) and other tech demos
  • Real time clock emulation
  • 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 or Metal)

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
  • Game Boy Camera support

[Read more](https://sameboy.github.io/features/).


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/).