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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|fifth website = [http://cemu.info Cemu]|sixth support = Closed source[https://www.patreon.com/cemu Patreon]}}'''Cemu''' is a closed-source, Windows-only [[Wii U emulators|Wii U emulator]] for Windows. 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]. Currently, the GamePad, Classic, and Pro controllers  Before updates are emulated. It also requires a high-end PC to run games at full speedpublicly released, although there are numerous bugs that can crash games due they're accessible to unimplemented features. The latest version of Cemu is restricted backers over at first to project donors before being released to the public.<ref>[https://www.patreon.com/cemu</ref>their Patreon].

* [http://cemu.info/index.html#download Latest free public release]

You will also need enough storage for the 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 recommended* RAMMemory: 4 GB minimum, ===Recommended===* Windows 10 (64-bit)* Graphics Card: Supports OpenGL 4.0 or newer (avoid integrated graphics)* Memory: 6 GB or more recommended ==Game Formats and Files Needed=====Physical Dumps===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://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 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 an 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. The process of how to exactly acquire those files is detailed elsewhere on this wiki. Load the .rpx file from [Your gamelocation]/code/[yourgame].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 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 Cemu. Use the same process as above to download updates. Once decrypted, simply copy and paste these over the original game's files. To install updates and DLC on Cemu (1.7.3+): * Run the game at least once.* Check Cemu'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 the same name as the above (substituting the "NUMBERS" bit with the actual numbers) in your "CemuFOLDER/mlc01/usr/title" folder.* Add any updates (which must be added first) you want to the "CemuFOLDER/mlc01/usr/title/NUMBERS/NUMBERS/" folder.* Create a folder named "aoc" and put the DLC files into there. The "code", "content", and "meta" folders of the actual game itself also go in the "aoc" folder.

==How to get games=Amiibo Support===*Download an NUS downloader such as [http://application.wiiuusbhelper.com/Updater.exe WiiU USB Helper[Amiibo]]*Get the zip file with all the currently dumped .tiks from [http://www.wiiuiso.com/wiiare hard-uto-usbfind figurines unlocking various on-disc content in select 3DS and-tickets/389884-usb-wii-ticket-database-tikWii U games.html They use the mega link under TIK DATABASE on this page] then open it in WiiU USB Helper (just drag the entire zip file to the WiiUSBHelper)**You may need to sign in to view the forum postNFC technology. User: gfyjhiuhiuh Pass: zTqE1yf56NGemZR (Alternatively just use a bugmenot password)**Alternatively, just paste this URL into WiiU USB helper - https://wiiu.titlekeys.com/ - although it'll give you a lot of download titles Nintendo Amiibo data is distributed online as well, which may not work on cemu NFC tags (the .tik zip contains only retail disc gamesbin files) THIS CONTAINS DLC and the .tik database doesn't.*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 .tikThere's title). May I suggest that you choose your own region where possible, so a regularly updated complete set of 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*Load the .rpx file from [Your gamelocation]/code/[yourgame]official ones but there are also unofficial spoofed packs on various other sites.rpx with cemu

==Shadercaches==Normally, when playing a game in Cemu, a shader cache will be generated as you play. This will cause a lot Recent versions 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)include Amiibo support.Reddit seems Simply go to be a good place to get these shadercaches. Simply [https:NFC //www.reddit.com/r/CEMUcaches/ go here] Scan NFC Tag from file, and search for load the game you want a cache forrelevant .*Note that it bin file. Keep in mind Amiibo support in Cemu is very difficult to generate a 100% complete shadercache for large games incomplete right now and therefore this will not definitely completely eliminate stutteringall figurines are compatible yet - though incompatibilities may be caused by bad Amiibo dumps as well.

==ReferencesSetting Up Cemu=={{reflist}}===Controls===Cemu added native support for Wii Remote controllers as of 1.12.0. Cemu cannot connect to a real (or emulated) [[Nintendo 3DS emulators|3DS]]. ===Cemuhook===Using this is completely optional. Download [http://sshnuke.net/cemuhook/ the latest version] compatible with your Cemu version, unpack it to the same directory as cemu.exe and right-click on dbghelp.dll, check Proprieties, Digital Signatures tab, select a signature and press Details. This should make it no longer crash at start-up. Make sure you also have the latest GPU driver installed, as well as both x86 and x64 versions of the [http://www.microsoft.com/en-US/download/details.aspx?id=53840 Microsoft Visual C++ 2015 X64 Redistributable]. Whenever you boot Cemu now, this cemuhook tool is enabled by default and offers various additions for better motion control emulation or some graphical hacks that greatly enhance Zelda BOTW in particular. Accept to download the missing shared fonts as well as to make the text in some games (Super Mario Maker among others) display correctly. Enabling "GX2SetGPUFenceSkip (HACK)" enhances graphical emulation in BOTW in particular. A pre-installed Graphical Pack that comes with recent versions of Cemuhook, "LWZX Crash Workaround", as well as the "GX2DrawDone()" option under Experimental, should help with some general crashes specific to BOTW. ===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=====Shadercaches===Shaders are normally cached as you play the game. This can cause a lot of stutters and slow the game down. 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. [[File:Shadercachestuff.png|thumb|Some settings in the Nvidia control panel might help.]] 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 Packs==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 change in the interface. Basic rendering options including shadow resolution and quality, post-processing effects like bloom, lighting and god rays, custom anti-aliasing, 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 doesn't support that, but it is planned. The "Graphic Packs" themselves are folders under the <code>graphicPacks</code> directory. They can be named anything, but they should contain the "<code>rules.txt</code>" file. A bare-bones example of a "Graphics Pack", called "Bayo_1080p", would look like this:  [Definition] titleIds = 0005000010172600,0005000010172700,000500001011b900,000500001014db00,0005000010157e00,0005000010157f00 name = "Bayonetta 1 + 2 - 1080p" [TextureRedefine] width = 1280 height = 720 overwriteWidth = 1920 overwriteHeight = 1080 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. The overwriteWidth and overwriteHeight properties used in this example will upscale the game from 720p to 1080p. But if the game doesn't have all of its textures in the specified resolution, they won't be upscaled and could look messy as a result. In this case, this problem is seen in some FMVs in the game. This is the purpose of the TextureRedefine rule. See some of the community graphics packs at [http://slashiee.github.io/cemu_graphic_packs/ this page]. ==Issues==* Save states aren't getting implemented any time soon. This has a lot to do with the complexity of the Wii U memory layout and architecture, as well as the huge file size. As a result, the current developers are not interested in implementing them.* The emulator is still unfinished and unoptimized, as noted in the lack of efficient and stable H.264 video decoding, causing glitchy videos. This is worked around with Cemuhook entirely, but its approach to video decoding is unlikely to be taken into the emulator. ===Piracy===There are anti-piracy measures on the Patreon early-access builds that are put behind the $5 tier. Backers putting out these builds can get banned if they're caught, and when the program fails verification, it locks down some features that impact performance. Until 1.7.5 was released, mudlord put out cracked versions of early builds on his personal blog. A subreddit and Discord server was made to discuss Cemu piracy. The official subreddit for Cemu advises against downloading unofficial "builds", saying they could potentially be traced with malware, and have made it one of their rules not to advocate it. The Cemu piracy subreddit has encountered malware authors taking advantage of this.