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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 = MPL-2.0|compatibility = Closed source}}[https://compat.cemu.info Compatibility list]|support = [https://www.patreon.com/cemu Patreon]'''Cemu''' is a closed-|source, Windows= [https://github.com/cemu-only project/Cemu GitHub]|bios = [[Wii U emulatorsEmulator_files#Wii_U|Wii U emulatorOptional]]. Currently, the GamePad, Classic, and Pro controllers are emulated. 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 '''[[wikipedia:Cemu |Cemu]]''' is restricted at a [[Wii U emulators|Wii U emulator]], first to project donors for a weekreleased in 2015 and eventually made open-source in 2022.<ref>https://www.patreon.com/cemu</ref> It's then followed by known for being the first Wii U emulator to successfully boot a free release with further improvementsgame.

==DownloadsDownload==* {| 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/>|}

If you're on Linux, CEMU can be run using WINE with unexpectedly good results* Windows 7 (x64) or above* macOS 12 Monterey or above* OpenGL 4.5 or Vulkan 1. Compared to performance on Windows1* RAM: 4 GB minimum, it runs in full speed with no noticeable input lag for instance.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 ==Playing GamesGame 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 Unpack/Convert to Loadiine (Pack/Unpack - Loadiine/CIA).* 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.

Use The Update installation method has been reworked since 1.11.0 simplifying the same process as above to download installation method a lot.To install updatesand DLC on Cemu on (1.11. Once decrypted, simply copy and paste 0)+ versions you need to follow these over the original game's files.steps :

To install updates on *On Cemu (1.7.3+): * Play the interface, select File → Install game at least once update or DLC* Open "log.txt" and find "TitleId of launched game" followed by a 16-digit number. Copy down that 16-digit number. * Go to "CEMUFOLDER/mlc01/usr/title" and create a folder with Select the first 8 digits of that 16-digit code* Inside of that folder, create a folder named with the last 8 digitsmeta. * Put xml in the files meta folder of the update into the folderor DLC* To apply DLC create a folder inside of Run the folder with your game to update the UI and create a folder named "aoc" show the update and put the /or DLC files into there and simply run the game.version

To add DLC to ===Amiibo support===[[Amiibo]] are figurines unlocking various on-disc content in select 3DS and Wii U games:*Run . They use the game NFC technology. Nintendo Amiibo data is distributed online as normal, at least onceNFC tags (.bin files). *Check CemuThere's log.txt file and look for a line that says "Mounting local storage (AOC): .\mlc01\usr\title\NUMBERS\NUMBERS\aoc\"*Add (create) folders with regularly updated complete set of the same name as the above (substituting the "NUMBERS" bit with the actual numbers) in your cemu\mlc01\etcofficial ones, but there are also unofficial spoofed packs on various other sites. file*Add any updates (must be added first) and DLC you want to this folder (code, content and meta folders live inside the aoc folder)

===Amiibo Support===Amiibo are hard-to-find 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). 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 sites. Recent versions of CEMU Cemu include Amiibo support. Simply go to NFC / Scan NFC Tag from file, and load the relevant .bin file. Keep in mind Amiboo Amiibo support in CEMU Cemu is incomplete right now and not all figurines are compatible yet - though incompatibilities may be caused by bad Amiboo Amiibo dumps as well.

As of 1.7.3d, the Wii U GamePad and the Wii U Classic Controller are emulated, but the Wiimote still isn't emulated yet. You can set up to 8 GamePads in the menu if you want. Emulated Wii U GamePad features are as follow: * 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" to keep focus. TV by default.* Microphone: Spoofed, a configurable key simulates blowing on the mic. A menu allows Cemu added native support for loading NFC tags from Amiibos. (More details would be appreciated) As of now, no online features or 3DS/Wii U connectivity features are possible. ==Improving Performance=====Shadercaches===Normally, when playing a game in Cemu, a shader cache will be generated Remote controllers as you play. This will cause a lot of stutter and slow the game down the first time you play that level/area/game.Luckily, Cemu allows you to transfer your shader cache, allowing you to download one from a friend (or just someone else on the internet).Reddit seems to be a good place to get these shadercaches. Simply [https://www.reddit.com/r/CEMUcaches/ go here] and search for the game you want a cache for.*Note that it is very difficult to generate a 100% complete shadercache for large games and therefore this will not definitely completely eliminate stuttering. Transferable shader caches may cause slowdowns in some games, on some graphics cards (observed in Geforce 970s). If this is the case, delete both your transferable and precompiled caches as well as the .bin 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 shaders.*This may get fixed after 1.712.0, who knows? Changing your NVidia control panel settings to look like this might help with shadercache slowdown issues: [[File:Shadercachestuff.png]]

===Native H264 Decoder===Lots of Wii U games use high resolution MP4 videos and render them using codecs intended for the Wii U, which can get slow Cemu cannot connect to emulate, and cause display bugs on CEMU. a real (or emulated) [[https://sshnuke.net/cemuhook/ CEMUhookNintendo 3DS emulators|3DS]] is a hook utility used in conjunction with CEMU from versions 1.7.3 onward to render these cutscenes with a much faster video codec native to Windows. It's not officially supported though.

===Getting more performanceShader caches===Some users have reported that disabling hyperthreading improves performance 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\shaderCache\transferable</code>. On Windows with hyperthreaded cores, turn off processor affinity for imaginary coresThey'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://chriztr.github. This will be every other core in io/cemu_shader_and_pipeline_caches/ here] and rename them to match your processor affinity. To do this, go game version's ID to the cemuspare yourself most of that unpleasant experience.exe process Just keep in task manager, right click, set affinity and then turn off every other core:mind that shader caches from versions older than 1.8.0 are incompatible with later versions of Cemu.

[[File:Processor_affinityAt startup, Cemu will prepare a compiled version of that cache under <code>.\Cemu\shaderCache\precompiled</code> and that one depends on your GPU driver, so you might want to erase it if any problems or crashes when compiling shaders at startup occur.png]]

==Increasing Internal ResolutionTroubleshooting/speeding up==The so-called "Graphic Packs", '''not to be confused with Texture Packs (since CEMU can't use them for that functionality yet),''' allow for upscaling ===Shader caches===Shaders are normally cached as you play the in-game graphics to higher resolutions than in the original, as well as other basic rendering options (shadow resolution/quality, post-processing effects like bloom, lightning and godrays, custom anti-aliasing). It This can affect what resolution cause a lot of stutters and slow the game is rendered asdown. However, as well as shadersof version 1.19.0, and works as a workaround Cemu added support for some emulation bugs. You Asynchronous Shader Compiling on their Vulkan API which can even reduce internal resolution to enjoy a slight FPS increasemake shader compiling near instantaneous on modern hardware, so try enabling that before hunting for shader caches.

Developers plan to add custom texture replacement in the future (hence the name) but Cemu accepts other shader caches thatcan be traded online. It's yet often very difficult to be seen as of 1.7.6generate a complete cache for large games, and will not completely eliminate stuttering, which is why using Asynchronous Shader Compiling is recommended instead.

The Graphic Packs themselves come as folders under [[File:Shadercachestuff.png|thumb|Some settings in the graphicPacks directoryNvidia control panel might help. You can name these folders whatever you want (for example "Bayo_1080p"), which contains just a single "rules.txt" file. A more bare-bones file would look like this:]]

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>::[Definition]::titleIds = 0005000010172600,0005000010172700,000500001011b900,000500001014db00,0005000010157e00,0005000010157f00::name = "Bayonetta 1 + 2 - 1080p"::::[TextureRedefine]::width = 1280::height = 720::overwriteWidth = 1920::overwriteHeight = 1080 %APPDATA%\NVIDIA\GLCache\(hexstring)\(hexstring)</code>.

In CEMU==Graphic Packs==To work around emulation bugs and other problems the way [[Dolphin]] does, under Options/Graphics Pack, you'll see this particular graphic pack as "Bayonetta 1+2 Graphic Packs" are title- 1080p"specific property sheets which define advanced settings you might not be able to change in the interface. The name doesn't matterBasic rendering options including shadow resolution and quality, post-processing effects like bloom, lighting and god rays, custom antialiasing, what matters the most would and such can be that the titleIds (applied here matching all three US/EU/JP versions of both Bayonetta 1 and 2) match that of the game in question. You can get even use them to ''reduce'' the titleIds looking at internal resolution for an increase in the logsframerate.txt file CEMU generates whenever it loads a new game (and This is not to be confused with '''Texture Packs''', which you can delete safely so that it are replacement textures; Cemu doesn't get too big to read)support that, but it is planned.

When you enable this graphical pack and then load The "Graphic Packs" themselves are folders under the game, it will play following this rule which is upscaling a game that runs as 1280x720 so that it runs as 1920x1080<code>graphicPacks</code> directory. But if the game doesn't have all of its textures originally in that resolution you specified (1280x720)They can be named anything, but they won't be upscaled and it could look messy as a resultshould contain the "<code>rules.txt</code>" file. For A bare-bones exampleof a "Graphics Pack", in Bayonetta 2's casecalled "Bayo_1080p", would look like this problem can be seen in some FMVs. That's why some graphical packs add exclusions to the TextureRedefine rule. But this here is a good starting point to create graphical packs for games that no one bothered to do, like Meme Run or Devil's Third among others.:

You can (and probably should) get most of the graphics packs made so far [http://slashiee.github.io/cemu_graphic_packs/ from hereDefinition]. titleIds = 0005000010172600,0005000010172700,000500001011b900,000500001014db00,0005000010157e00,0005000010157f00 name = "Bayonetta 1 + 2 - 1080p" [TextureRedefine] width = 1280 height = 720 overwriteWidth = 1920 overwriteHeight = 1080

==Issues==HereWhenever the titleId matches the current one, Cemu will show the Graphics Pack under Options → Graphics Pack. If you don's some t know what the titleId of the actual issues game you want is, check the <code>logs.txt</code> file. You can safely delete it in the event that directly relate it gets too big for a text editor to the end user experience:parse.

* Save states aren't getting implemented any time soon. A lot of The overwriteWidth and overwriteHeight properties used in this has example will upscale the game from 720p to do with 1080p. But if the complexity game doesn't have all of its textures in the Wii U memory layout specified resolution, they won't be upscaled and architecture, could look messy as well as the huge file size. As a result. In this case, this problem is seen in some FMVs in the current developers are not interested in implementing them.* Frequent stuttering is often experienced when you first start a game, because CEMU is building your shader cache. One solution This is to get shader caches available online for your game and use it. They also have been compatible across different versions the purpose of the emulators for quite a whileTextureRedefine rule.

That asideSince 1.13.0, the graphic packs system and interface was overhauled for better use and many bugs when using multiples graphic packs were fixed.For 1.15.1 and now on, thereusers can download the community's other issues that stem graphics packs linked below directly from Cemu user interface and just check the unfinished and unoptimised nature of graphics packs they want to enable. That update completly removed the emulator, like need to manage files for the lack of native H264 video decoding libraries causing green screens and glitchy videos (which is solved with Cemuhook) among other thingsuser.

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