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Cemu 1.5.5


Cemu is a Highly experimental software to emulate Wii U applications on PC


  • Can run encrypted Wii U images (WUD) and RPX/RPL files
  • Internal resolution is 1920x1080 (if supported by game)
  • Contains basically no optimizations. Expect slow framerates and long load times.
  • Windows 7 or above (x64) (other platforms may be supported later)
  • Requires OpenGL 4.0
  • Tested on NVIDIA and AMD: Runs fine on most recent driver
  • Tested on Intel: Garbled output but runs if OpenGL version is supported


CEMU detailed changelog for 1.5.5
Patreon release date: 2016-08-08
Public release data: 2016-08-15




New in public release


  • general: Added crash logging (In case of crash, CEMU will log information to 'crashlog.txt')
  • general: Undid change to hide cursor in fullscreen (Better solution is in the works)


Patreon release


  • general: Added game profiles (text files that store settings per-game)
  • general: Added automatic region detection
  • general: Mouse cursor is now hidden in fullscreen mode
  • general: Added hotkey (Ctrl + Tab) to toggle between TV or GamePad display. (Note: This is only a temporary solution until we have better GamePad handling)
  • general: CEMU will now display game name and region in the titlebar.
  • coreinit: New API: OSInitSemaphoreEx(), FSWriteFileAsync()
  • h264: Improved implementation of H264DECMemoryRequirement()
  • CPU: Added RLWNM., PS_RSQRTE, PS_RES, PS_NEG, STFSUX, MFTB/MFTBU, LSWI/STSWI and TW instructions to recompiler
  • CPU: Optimized code generated by recompiler for instructions RLWIMI, RLWINM
  • CPU: Added optimizer pass to recompiler (Removes redundant instructions)
  • CPU: Fixed a bug in interpreter MFTB/MFTBU
  • GX2: Fixed a deadlock that could happen when the game was waiting for an vsync event to occur
  • GX2: Added experimental setting 'Use persistent vertex buffers'. If enabled, CEMU will attempt to use more recent OpenGL features to stream geometry data to the GPU. Allows for higher throughput but may cause graphical issues.
  • GX2: Fixed a bug in GX2ConvertDepthBufferToTextureSurface() that could lead to a softlock
  • GX2: Improved Streamout emulation
  • nn_save: New API SAVEMakeDirAsync(), SAVERemoveAsync(), SAVEGetStatAsync(), SAVERenameAsync(), SAVEOpenDirOtherNormalApplicationAsync()
  • nn_save: Fixed a bug in SAVEGetStatOtherApplication()


cemu emulator



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