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{{Infoboxemulator|image logo = Cemu-Logo.png|first version = {{CemuVerVersion|Cemu}}|second active = Yes|third platform = [[Emulators on Windows|Windows]]</br>[[Emulators on Linux|Linux]] (experimental)</br>[[Emulators on macOS|macOS]] (experimental)|fourth architecture = x86_64|target = [[Wii U emulators|Wii U]]|developer = Exzap, Petergov|fifth website = [http://cemu.info Cemu]|sixth license = Closed source}}MPL-2.0'''Cemu''' is a closed-source |compatibility = [[Wii U emulators|Wii U emulator]] for Windows. System requirements are pretty high<ref>It works at full speed with i3 6100 + GeForce GTX 750 Ti though.<https://ref> if you want games to run at full speed, although there are numerous bugs that can crash games due to unimplemented featurescompat. It emulates the GamePad, Classic, and Pro controllerscemu. A compatibility info Compatibility list can be found ]|support = [httphttps://docswww.googlepatreon.com/spreadsheetscemu Patreon]|source = [https:/d/19WV2YQvS2PkiHnQTlYP7cE2eHOPl06Rx4tCvfud_Hpwgithub.com/edit?prefcemu-project/Cemu GitHub]|bios =2&pli=1[[Emulator_files#gid=0 hereWii_U|Optional]].}}

Before updates are publicly released, they're accessible to backers over at ''[[httpswikipedia://wwwCemu|Cemu]]''' is a [[Wii U emulators|Wii U emulator]], first released in 2015 and eventually made open-source in 2022.patreon.com/cemu their Patreon]It's known for being the first Wii U emulator to successfully boot a game.

==DownloadsDownload==* {| cellpadding="4"|align=center|{{Icon|Win}}|'''[http://cemu.info/index.html#download Latest public release]'''<br/><small>Available one week after the Patreon builds release</small><br/>|-|align=center|{{Icon|Win|Lin|Mac}}|'''[https://github.com/cemu-project/Cemu/releases GitHub release]'''<br/><small>Experimental</small><br/>|}

* Windows 7 (x64) or above* macOS 12 Monterey or above* OpenGL 4.5 or Vulkan 1.1* RAM: 4 GB minimum, 8 GB or more recommended '''NVIDIA GPU:''' Runs as expected on most recent driver.<br>'''AMD GPU:''' Runs as expected on most recent driver. Avoid OpenGL due to bad performance<br>'''Intel GPU:''' Limited support. Vulkan is recommended ==Setting upGame formats and needed files=====Physical Dumpsdumps===

Your file must have many lines like this, one for the Wii U Common Key (D7B00402659BA2ABD2CB0DB27FA2B656), and one line for the Game Key of each game. Sharing these keys isn't exactly safe legally, but ROM sites at least share [http://pastebin.com/GWApZVLa the Game ones]. Note that for games using the Loadiine format, you won't need a Game Key at all, but those will need Cemu versions from 1.4.0 onward.

Your ISO must be either uncompressed, compressed using WUD format, or in Loadiine format (only possible for versions 1.4.0 onward) to boot in Cemu. Here's a [http://docs.google.com/spreadsheets/d/19WV2YQvS2PkiHnQTlYP7cE2eHOPl06Rx4tCvfud_Hpw/edit?pref=2&pli=1#gid=0 compatibility list]. Dump your discs using [https://gbatemp.net/threads/wudump-dump-raw-images-from-a-wiiu-game-disc.451736/ Wudump].

===Digital Copiescopies===CEMU Cemu supports either physical games dumps in WUD, or compressed WUX format, as well as game dumps converted to the Loadiine format. Loadiine games come as multiple directories with game files and a .rpx file.

Nintendo's servers are poorly secured due to a huge oversight when designing Wii U/3DS software protection. As such, with tickets proving you bought the game (but which you can get through less legit ways), there are downloader utilities like NUSGrabber, FunKiiU, UWizard, or jnus among others, and decryption tools like UWizard and CDecrypt, to obtain a functional copy.* Download an NUS downloader such as [http://application.wiiuusbhelper.com/Updater.exe WiiU USB Helper].* Paste this URL into WiiU USB helper when prompted for the titlekey database. - https://wiiu.titlekeys.com/* Select the game you want to download, click get it and then download games.* This will download the files for the game you chose (the same as the .tik's title). May I suggest that you choose your own region where possible, so the download is quicker (from your regional servers).* Now we need to convert the game into Loadiine format so that you can load it in Cemu. Simply right click your newly downloaded game, then click "Prepare for Emulation".* Load the .rpx file from [Your gamelocation]/code/[yourgame].rpx with cemuCemu.

Prior to 1.7.3, only updates were supported though pasting update files on the main game's folders (keeping in mind the main game is in Loadiine format) and overwriting any files. DLC wouldn't work at all through this method, though with some specific games there were workarounds and some could play DLC tracks in Mario Kart 8 through swapping of specific files. From 1.7.3 onwards, proper support for DLC and updates was included in CEMUCemu. The Update installation method has been reworked since 1.11.0 simplifying the installation method a lot.To install updates and DLC on Cemu on (1.11.0)+ versions you need to follow these steps :

Use *On Cemu interface, select File → Install game update or DLC*Select the meta.xml in the same process as above meta folder of the update or DLC*Run the game to download updates. Once decrypted, simply copy update the UI and paste these over show the original game's files.update and/or DLC version

To install updates ===Amiibo support===[[Amiibo]] are figurines unlocking various on-disc content in select 3DS and DLC on Cemu (1.7Wii U games.3+): * Run They use the game at least once.* Check Cemu's log.txt file and look for a line that says "Mounting local storage (AOC): NFC technology.\mlc01\usr\title\NUMBERS\NUMBERS\aoc\"* Add (create) folders with the same name Nintendo Amiibo data is distributed online as the above NFC tags (substituting the "NUMBERS" bit with the actual numbers) in your "CEMUFOLDER/mlc01/usr/title" folder.* Add any updates (which must be added firstbin files) you want to the "CEMUFOLDER/mlc01/usr/title/NUMBERS/NUMBERS/" folder.* Create There's a folder named "aoc" and put regularly updated complete set of the DLC files into official ones, but there. The "code", "content", and "meta" folders of the actual game itself are also go in the "aoc" folderunofficial spoofed packs on various other sites.

===Recent versions of Cemu include Amiibo Support===Amiibo are hard-support. Simply go to-find figurines unlocking various on-disc content in select 3DS NFC / Scan NFC Tag from file, and Wii U gamesload the relevant . They use the NFC technologybin file. Nintendo Keep in mind Amiibo data support in Cemu is distributed online incomplete right now and not all figurines are compatible yet - though incompatibilities may be caused by bad Amiibo dumps as NFC tags (.bin files). Here's a recent complete set of the official ones ([https://mega.nz/#F!Z4UWVIYS!HsOvjW4tUMHE40ECIG7sMQ March 2017]) but there's also unofficial spoofed packs on various other siteswell.

The Wiimote still isn't emulated yet, but you can have up to 8 GamePads set in the menuCemu added native support for Wii Remote controllers as of 1.12.0.

Wii U GamePad bindings:* Touch Controls: Mouse left click.* Tilting and Gyro Controls: Holding the mouse right-click and dragging. It's lacking Z-axis key binding at the moment.* Switch Screens between TV and GamePad: "TAB" key, "Ctrl+TAB" Cemu cannot connect to keep focus. TV by default.* Microphone: Spoofed, a configurable key simulates blowing on the micreal (or emulated) [[Nintendo 3DS emulators|3DS]].

===Shader caches===When your game is loaded, check for its ID on the title bar in front of "SaveDir:" and note it down. The directory where transferable shader caches are stored is <code>.\Cemu cannot go online or connect to \shaderCache\transferable</code>. They're generated the first time you play through a game and at that time cause noticeable stuttering. You can download a real (or emulated) [complete cache from places like [Nintendo 3DS emulators|3DS]https://chriztr.github.io/cemu_shader_and_pipeline_caches/ here]and rename them to match your game version's ID to spare yourself most of that unpleasant experience. Just keep in mind that shader caches from versions older than 1.8.0 are incompatible with later versions of Cemu.

==Troubleshooting/Speeding up=====Shadercaches===Shaders are normally cached as you play the game. This can cause At startup, Cemu will prepare a lot compiled version of stutter that cache under <code>.\Cemu\shaderCache\precompiled</code> and slow the game downthat one depends on your GPU driver, so you might want to erase it if any problems or crashes when compiling shaders at startup occur.

==Troubleshooting/speeding up=====Shader caches===Shaders are normally cached as you play the game. This can cause a lot of stutters and slow the game down. However, as of version 1.19.0, Cemu added support for Asynchronous Shader Compiling on their Vulkan API which can make shader compiling near instantaneous on modern hardware, so try enabling that before hunting for shader caches. Cemu accepts other shader caches that can be traded online. You can go to [https://www.reddit.com/r/CEMUcaches/ /r/CEMUcaches] and search for the ones you want. It's often very difficult to generate a complete cache for large games, and will not completely eliminate stuttering, which is why using Asynchronous Shader Compiling is recommended instead.

Some games' transferable caches may cause slowdowns on some graphics cards , like the GeForce GTX 970. If this is the case, you will have to generate your own shaders and delete the ones you downloaded. In the case of the GeForce, also consider deleting the .bin and /.toc file in your GLCache at <code>%APPDATA%\NVIDIA\GLCache\(hexstring)\(hexstring)</code>. ===Native H.264 Decoder===MP4 videos are often encoded for Wii U games with the expectation that the hardware plays it back on-the-fly, but because the x86 architecture is not PowerPC, this is resource-intensive for Cemu since it has to run the PowerPC video decoder. An unofficial utility called [https://sshnuke.net/cemuhook/ CEMUhook] bypasses this by playing H.264 video directly from Windows codecs that are programmed for x86. ===Disable Hyperthreading===Cemu may not be programmed well with hyperthreading. To disable it, go into the Task Manager, right click cemu.exe and then set these affinities: [[File:Processor_affinity.png]]

==Graphics Graphic Packs==To work around emulation bugs and other problems the way [[Dolphin]] does, "Graphic Packs" are title-specific property sheets which defines define advanced settings you might not be able to change in the interface. Basic rendering options including shadow resolution and quality, post-processing effects like bloom, lighting and godraysgod rays, custom anti-aliasingantialiasing, and such can be applied here. You can even use them to ''reduce'' the internal resolution for an increase in the framerate. This is not to be confused with '''Texture Packs''', which are replacement textures; CEMU Cemu doesn't support that, but it is planned.

Whenever the titleId matches the current one, Cemu will show the Graphics Pack under Options -> → Graphics Pack. If you don't know what the titleId of the game you want is, check the <code>logs.txt</code> file. You can safely delete it in the event that it gets too big for a text editor to parse.

* [httphttps://compatwiki.cemu.info/ Compatibility listwiki/Main_Page Wiki]* [https://discord.gg/5psYsup Official Discord]