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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)|architecture = x86_64|target = [[Wii U emulators|Wii U]]|fourth developer = Exzap, Petergov|fifth website = [http://cemu.info Cemu]|sixth license = Closed source}}MPL-2.0'''Cemu''' is a closed-source, Windows-only |compatibility = [[Wii U emulators|Wii U emulator]]https://compat. Currently, the GamePad, Classic, and Pro controllers are emulatedcemu. It also requires a high-end PC to run games at full speed, although there are numerous bugs that can crash games due to unimplemented features. The latest version of Cemu is restricted at first to project donors before being released to the public.<ref>info Compatibility list]|support = [https://www.patreon.com/cemu<Patreon]|source = [https://github.com/cemu-project/ref>Cemu GitHub]|bios = [[Emulator_files#Wii_U|Optional]]}}

'''[[wikipedia:Cemu|Cemu]]''' is a [[Wii U emulators|Wii U emulator]], first released in 2015 and eventually made open-source in 2022. It's known for being the first Wii U emulator to successfully boot a game. ==Download==Downloads{| cellpadding="4"|align=center|{{Icon|Win}}* |'''[http://cemu.info/index.html#download Latest free 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 ==Game formats and needed files=====Physical dumps=How to get games==*Download an NUS downloader such You'll first need to fill in the "keys.txt" file in Cemu's directory. It has a sample line with a bogus key and a comment, which you may as well delete.  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://application.wiiuusbhelperpastebin.com/UpdaterGWApZVLa the Game ones].exe WiiU USB Helper]*Get Note that for games using the zip file with Loadiine format, you won't need a Game Key at all the currently dumped , 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.tiks from Here's a [http://wwwdocs.wiiuisogoogle.com/wiispreadsheets/d/19WV2YQvS2PkiHnQTlYP7cE2eHOPl06Rx4tCvfud_Hpw/edit?pref=2&pli=1#gid=0 compatibility list]. Dump your discs using [https://gbatemp.net/threads/wudump-udump-usbraw-andimages-tickets/389884from-usba-wiiwiiu-ticketgame-database-tikdisc.451736/ Wudump]. ===Digital copies===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 CDN for Wii U and 3DS digital games is rather poorly secured, due to a huge oversight when designing the software protection for these consoles.html As such, with tickets proving you bought the mega link under TIK DATABASE 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. The process of how to exactly acquire those files is detailed elsewhere on this pagewiki. Load the .rpx file from [Your gamelocation]/code/[yourgame] then open it .rpx with Cemu. ===Updates and DLC===Prior to 1.7.3, only updates were supported though pasting update files on the main game's folders (keeping in WiiU USB Helper (just drag mind the entire zip file to 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 Cemu. The Update installation method has been reworked since 1.11.0 simplifying the WiiUSBHelperinstallation method a lot.To install updates and DLC on Cemu on (1.11.0)+ versions you need to follow these steps :  *On Cemu interface, select File → Install game update or DLC*Select the meta.xml in the meta folder of the update or DLC*You may need Run the game to sign update the UI and show the update and/or DLC version ===Amiibo support===[[Amiibo]] are figurines unlocking various on-disc content in select 3DS and Wii U games. They use the NFC technology. Nintendo Amiibo data is distributed online as NFC tags (.bin files). There's a regularly updated complete set of the official ones, but there are also unofficial spoofed packs on various other sites. Recent versions of Cemu include Amiibo support. Simply go to view NFC / Scan NFC Tag from file, and load the forum postrelevant .bin file. Keep in mind Amiibo support in Cemu is incomplete right now and not all figurines are compatible yet - though incompatibilities may be caused by bad Amiibo dumps as well. ==Setting up Cemu=====Controls===Cemu added native support for Wii Remote controllers as of 1.12.0. User: gfyjhiuhiuh Pass: zTqE1yf56NGemZR  Cemu cannot connect to a real (Alternatively just use a bugmenot passwordor emulated)[[Nintendo 3DS emulators|3DS]]. **Alternatively===Shader caches===When your game is loaded, just paste this URL into WiiU USB helper - 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\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 complete cache from places like [https://wiiuchriztr.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.titlekeys8.com0 are incompatible with later versions of Cemu. At startup, Cemu will prepare a compiled version of that cache under <code>.\Cemu\shaderCache\precompiled</ - although code> and that one depends on your GPU driver, so you might want to erase it'll give 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 download titles stutters and slow the game down. However, as wellof version 1.19.0, Cemu added support for Asynchronous Shader Compiling on their Vulkan API which may not work can make shader compiling near instantaneous on cemu (the modern hardware, so try enabling that before hunting for shader caches. Cemu accepts other shader caches that can be traded online.tik zip contains only retail disc It's often very difficult to generate a complete cache for large games) THIS CONTAINS DLC , and will not completely eliminate stuttering, which is why using Asynchronous Shader Compiling is recommended instead. [[File:Shadercachestuff.png|thumb|Some settings in the Nvidia control panel might help.tik database doesn]] Some games'ttransferable caches may cause slowdowns on some graphics cards, like the GeForce GTX 970.*Select If this is the game case, you want will have to download, click get it generate your own shaders and then download games*This will download delete the files for ones you downloaded. In the game you chose (case of the same as GeForce, also consider deleting the .tik's title)bin and . May I suggest that you choose toc file in your own region where possible, so the download is quicker GLCache at <code>%APPDATA%\NVIDIA\GLCache\(hexstring)\(from your regional servershexstring)</code>. ==Graphic Packs==*Now we need To work around emulation bugs and other problems the way [[Dolphin]] does, "Graphic Packs" are title-specific property sheets which define advanced settings you might not be able to convert change in the game into loadiine format so that you interface. Basic rendering options including shadow resolution and quality, post-processing effects like bloom, lighting and god rays, custom antialiasing, and such can be applied here. You can load it 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; Cemudoesn't support that, but it is planned. *Simply right click your newly downloaded gameThe "Graphic Packs" themselves are folders under the <code>graphicPacks</code> directory. They can be named anything, then click Unpackbut they should contain the "<code>rules.txt</Convert to Loadiine (code>" file. A bare-bones example of a "Graphics Pack/Unpack ", called "Bayo_1080p", would look like this:  [Definition] titleIds = 0005000010172600,0005000010172700,000500001011b900,000500001014db00,0005000010157e00,0005000010157f00 name = "Bayonetta 1 + 2 - Loadiine/CIA)1080p" [TextureRedefine] width = 1280 height = 720 overwriteWidth = 1920 overwriteHeight = 1080 *Load 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.rpx file from [Your gamelocation]txt</code/[yourgame]> file. You can safely delete it in the event that it gets too big for a text editor to parse.rpx with cemu

==Shadercaches==Normally, when playing a game The overwriteWidth and overwriteHeight properties used in Cemu, a shader cache this example will be generated as you playupscale the game from 720p to 1080p. This will cause a lot of stutter and slow But if the game down doesn't have all of its textures in the first time you play that level/area/game.Luckily, Cemu allows you to transfer your shader cachespecified resolution, allowing you to download one from a friend (or just someone else on the internet).Reddit seems to they won't be upscaled and could look messy as a good place to get these shadercachesresult. Simply [https://www.reddit.com/r/CEMUcaches/ go here] and search for In this case, this problem is seen in some FMVs in the game you want a cache for.*Note that it This is very difficult to generate a 100% complete shadercache for large games and therefore this will not definitely completely eliminate stutteringthe purpose of the TextureRedefine rule.

Transferable shader caches may cause slowdowns in some gamesSince 1.13.0, on some graphics cards (observed in Geforce 970s). If this is the case, delete both your transferable graphic packs system and precompiled caches as well as the .bin interface was overhauled for better use and /toc file in your NVIDIA GLCache found in C:\Users\(You)\AppData\Roaming\NVIDIA\GLCache\(hexstring)\(hexstring). In this case, you will have to generate your own shadersmany bugs when using multiples graphic packs were fixed.*This may get fixed after For 1.715.01 and now on, who knows?users can download the community's graphics packs linked below directly from Cemu user interface and just check the graphics packs they want to enable. That update completly removed the need to manage files for the user.

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