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{{Infoboxemulator|image logo = Cemu-Logo.png|first version = {{CemuVer}}|second active = Yes|third platform = Windows|fourth architecture = x86_64|target = [[Wii U emulators|Wii U]]|developer = Exzap, Petergov|fifth website = [http://cemu.info Cemu]|sixth license = Closed -sourcefreeware|support = [https://www.patreon.com/cemu Patreon]}}'''[[wikipedia:Cemu|Cemu]]''' is a closed-source, Windows-only [[Wii U emulators|Wii U emulator]]. Currently, the GamePad, Classic, and Pro controllers are emulatedfor Windows. It also requires a high-end PC is known to run games at full speed, although there are numerous bugs be the very first Wii U emulator ever that can crash boot games due to unimplemented features. A compatibility list can be found [http://compat.cemu.info/ here] or [http://docs.google.com/spreadsheets/d/19WV2YQvS2PkiHnQTlYP7cE2eHOPl06Rx4tCvfud_Hpw/edit?pref=2&pli=1#gid=0 here].

The latest version of Cemu is restricted Before updates are publicly released, they're accessible to backers over at first to project donors for a week.<ref>[https://www.patreon.com/cemu</ref> It's then followed by a free release with further improvementstheir Patreon].

==DownloadsDownload==* {| cellpadding="4"|-|align=center|{{Icon|Win-big}}|'''[http://cemu.info/index.html#download Latest free public release]'''<br/><small>Available one week after the Patreon builds release</small>|-|colspan="3"|<hr/>|-|align=center|{{Icon|Win-big}}|[https://yiff.party/patreon/2814971 Cracked Patreon builds]|}

You will also need enough storage for the [[Wii U emulators|Wii U]] games. Running Cemu on [[Wine]] has been reported to work just as well as Windows.===Minimum===* OS: Windows 7 (64-bit) or above* GPUGraphics Card: Supports at least OpenGL 4.0 or above, Intel iGPUs are not recommended1* RAMMemory: 4 GB minimum, ===Recommended===* Windows 10 (64-bit)* Graphics Card: Supports OpenGL 4.6 (avoid integrated graphics)* Memory: 8 GB or more recommended

==Playing GamesGame Formats and Files Needed==

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].

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. Once decrypted, simply copy and paste these over the original game's files11.0)+ versions you need to follow theses steps :

To install updates on *On Cemu (1.7.3+): * Play the interface, select File -> Install game at least once * 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 the first 8 digits of that 16-digit codeupdate or DLC* Inside of that folder, create a folder named with Select the last 8 digitsmeta. * Put xml in the files of the update into the folder* To apply DLC create a meta folder inside of the folder with your update and create a folder named "aoc" and put the DLC files into there and simply run the game. To add or DLC to games:*Run the game as normal, at least once. *Check Cemu's log.txt file to update the UI and look for a line that says "Mounting local storage (AOC): .\mlc01\usr\title\NUMBERS\NUMBERS\aoc\"*Add (create) folders with show the same name as the above (substituting the "NUMBERS" bit with the actual numbers) in your cemu\mlc01\etc. file*Add any updates (must be added first) update and /or DLC you want to this folder (code, content and meta folders live inside the aoc folder)version

[[Amiibo ]] are hard-to-find figurines unlocking various on-disc content in select 3DS and Wii U games. They use the NFC technology. Nintendo Amiibos are Amiibo data is distributed online as NFC tags (.bin files). HereThere's a recent regularly updated complete set of the official ones ([https://mega.nz/#F!Z4UWVIYS!HsOvjW4tUMHE40ECIG7sMQ March 2017]) but there's are 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 Cemu added native support for Wii Remote controllers as of 1.712.0.3d, the Wii U GamePad and the Wii U Classic Controller are  Cemu cannot connect to a real (or emulated) [[Nintendo 3DS emulators|3DS]]. ===Cemuhook===Using this is completely optional but highly recommended. Without Cemuhook, but the Wiimote still isnsome games won't emulated yet. You can set up to 8 GamePads in the menu if you wanthave texts, have laggy cutscenes and display numerous other bugs.

Emulated Wii U GamePad features are Download [http://sshnuke.net/cemuhook/ the latest version] compatible with your Cemu version, unpack it to the same directory as follow: * Touch Controls: Mouse left clickcemu.* Tilting exe and Gyro Controls: Holding the mouse right-click on dbghelp.dll, check Proprieties, Digital Signatures tab, select a signature and draggingpress Details. It's lacking ZThis should make it no longer crash at start-axis key binding at up. Make sure you also have the moment.* Switch Screens between TV latest GPU driver installed, as well as both x86 and GamePadx64 versions of the [https: "TAB" key, "Ctrl+TAB" to keep focus//aka.ms/vs/15/release/vc_redist. TV by defaultx64.* Microphone: Spoofed, a configurable key simulates blowing on the micexe Microsoft Visual C++ 2017 X64 Redistributable].

A menu allows After the first boot of Cemu with cemuhook installed, accept to download the missing shared fonts to make the text in some games (Super Mario Maker among others) display correctly.Whenever you boot Cemu now, this cemuhook tool is enabled by default and offers various additions for loading NFC tags from Amiibosbetter motion control emulation or some graphical hacks that greatly enhance Zelda BOTW in particular.Various way to take advantages of the cemuhook motion control emulation are listed [http://compat.cemu.info/wiki/Motion_Sensing#Full-motion_Solutions here]. (More details would be appreciated)

As Enabling "GX2SetGPUFenceSkip (HACK)" enhances graphical emulation in BOTW in particular. A pre-installed Graphical Pack that comes with recent versions of nowCemuhook, no online features or 3DS/Wii U connectivity features are possible"LWZX Crash Workaround", as well as the "GX2DrawDone()" option under Experimental, should help with some general crashes specific to BOTW.

As of version 1.18.0, cemuhook is no longer considered required to run the emulator, as all major functions previously provided by cemuhook have been implemented into the emulator itself. ==Improving Performance=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\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 [http://www.reddit.com/r/Cemucaches/comments/7bv7el/complete_shader_cache_collection_1110c_v2/ 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. At 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. ==Troubleshooting/Speeding up==

Normally, when playing a game in Cemu, a shader cache will be generated Shaders are normally cached as you playthe game. This will can cause a lot of stutter stutters 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 Cemu accepts other shader caches may cause slowdowns in some games, on some graphics cards (observed in Geforce 970s)that can be traded online. You can go to [https://www.reddit. If this is the case, delete both your transferable com/r/Cemucaches/ /r/Cemucaches] and precompiled caches as well as search for the ones you want.bin It's often very difficult to generate a complete cache for large games, 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 1.7not completely eliminate stuttering.0, who knows?

Changing your NVidia [[File:Shadercachestuff.png|thumb|Some settings in the Nvidia control panel settings to look like this might help with shadercache slowdown issues:.]]

[[File:ShadercachestuffSome 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>.png]]

===Native H264 H.264 Decoder===Lots of Wii U games use high resolution MP4 videos and render them using codecs intended are often encoded for the Wii Ugames with the expectation that the hardware plays it back on-the-fly, which can get slow but because the x86 architecture is not PowerPC, this is resource-intensive for Cemu since it has to emulate, and cause display bugs on CEMUrun the PowerPC video decoder. An unofficial utility called [https://sshnuke.net/cemuhook/ CEMUhookCemuhook] is a hook utility used in conjunction with CEMU from versions 1.7bypasses this by playing H.3 onward to render these cutscenes with a much faster 264 video codec native to directly from Windows. It's not officially supported thoughcodecs that are programmed for x86.

===Getting more performanceDisable Hyperthreading===Some users have reported that disabling hyperthreading improves performance in Cemu. On Windows may not be programmed well with hyperthreaded cores, turn off processor affinity for imaginary cores. This will be every other core in your processor affinityhyperthreading. To do thisdisable it, go to into the Task Manager, right-click cemu.exe process in task manager, right click, set affinity and then turn off every other coreset these affinities:

There's an ongoing controversy about CEMU being closed-source, but it's a purely meta discussion and isn* Save states aren't getting implemented any time soon. This has a deal killer if you just want lot to play do with the complexity of the Wii U games on PCmemory layout and architecture, as well as the huge file size. As a result, considering CEMU the current developers are not interested in implementing them.* The emulator is good enough for that still unfinished and unoptimized, as noted in the best choice available currentlylack of efficient and stable H.264 video decoding, causing glitchy videos. With that out of the wayThis is worked around with Cemuhook entirely, here's some of the actual issues that relate but its approach to video decoding is unlikely to be taken into the end user experience:emulator.

* Save states aren't getting implemented any time soon. A lot of this has to do with ===Piracy===There are anti-piracy measures on the complexity of Patreon early-access builds that are put behind the Wii U memory layout and architecture, as well as the huge file size$5 tier. As a resultBackers putting out these builds can get banned if they're caught, and when the current developers are not interested in implementing them.* Frequent stuttering is often experienced when you first start a gameprogram fails verification, because CEMU is building your shader cache. One solution is to get shader caches available online for your game and use it. They also have been compatible across different versions of the emulators for quite a whilelocks down some features that impact performance.

That asideUntil 1.7.5 was released, there's other issues that stem from the unfinished and unoptimised nature of the emulator, like the lack mudlord put out cracked versions of native H264 video decoding libraries causing green screens early builds on his personal blog. A subreddit and glitchy videos (which is solved with Cemuhook) among other thingsDiscord server was made to discuss Cemu piracy.