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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. Currently, the GamePad, Classic, and Pro controllers are emulatedgoogle. 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 featurescom/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].

* [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

If you're on Linux, CEMU can be run using WINE with unexpectedly good results. Compared to performance on Windows, it runs in full speed with no noticeable input lag for instance. ==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 cemu.

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.

To install updates and DLC on Cemu (1.7.3+): * Play the 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 code* Inside of that folder, create a folder named with the last 8 digits. * Put in the files of the update into the folder* To apply DLC create a 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 DLC to games:*Run the game as normal, 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 cemu\"CemuFOLDER/mlc01\etc/usr/title" folder. file*Add any updates (which must be added first) and DLC you want to this 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 live inside of the actual game itself also go in the "aoc " folder).

[[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). HereThere's a recent regularly updated 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 Cemu added native support for Wii Remote controllers as of 1.7.3d, the Wii U GamePad and the Wii U Classic Controller are emulated, but the Wiimote still isn't emulated yet12. You can set up to 8 GamePads in the menu if you want0.

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" 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]].

A menu allows for loading NFC tags from Amiibos===Cemuhook===Using this is completely optional. (More details would be appreciated)

As of nowDownload [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 online features or 3DSlonger 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/Wii U connectivity features are possibledetails.aspx?id=53840 Microsoft Visual C++ 2015 X64 Redistributable].

==Improving Performance=====Shadercaches===Normally, when playing a game in Whenever you boot Cemunow, a shader cache will be generated as you play. This will cause a lot of stutter this cemuhook tool is enabled by default and slow the game down the first time you play offers various additions for better motion control emulation, or some graphical hacks that level/area/gamegreatly enhance Zelda BOTW in particular.Luckily, Cemu allows you to transfer your shader cache, allowing you Accept to download one from a friend (or just someone else on the internet).Reddit seems missing shared fonts as well 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 make text in some games and therefore this will not definitely completely eliminate stuttering(Super Mario Maker among others) display correctly.

Transferable shader caches may cause slowdowns Enabling "GX2SetGPUFenceSkip (HACK)" enhances graphical emulation in some games, on some graphics cards (observed BOTW in Geforce 970s)particular. If this is the caseA pre-installed Graphical Pack that comes with recent versions of Cemuhook, "LWZX Crash Workaround", 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)\"GX2DrawDone(hexstring). In this case" option under Experimental, you will have should help with some general crashes specific to generate your own shadersBOTW.*This may get fixed after 1.7.0, who knows?

Changing ===Shader Caches===When your NVidia control panel settings game is loaded, check for its ID on the titlebar 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 look like this might help 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 shadercache slowdown issues:later versions of Cemu.

[[File:ShadercachestuffAt 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]]

==Troubleshooting/Speeding up===Native H264 Decoder==Shadercaches===Lots of Wii U games use high resolution MP4 videos and render them using codecs intended for Shaders are normally cached as you play the Wii U, which game. This can get slow to emulate, and cause display bugs on CEMU. [https://sshnuke.net/cemuhook/ CEMUhook] 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 thoughlot of stutter and slow the game down.

===Getting more performance===Some users have reported Cemu accepts other shader caches that disabling hyperthreading improves performance in Cemu. On Windows with hyperthreaded cores, turn off processor affinity for imaginary cores. This will can be every other core in your processor affinitytraded online. To do this, You can go to [https://www.reddit.com/r/Cemucaches/ /r/Cemucaches] and search for the cemuones you want.exe process in task managerIt's often very difficult to generate a complete cache for large games, right click, set affinity and then turn off every other core:will not completely eliminate stuttering.

[[File:Processor_affinityShadercachestuff.png|thumb|Some settings in the Nvidia control panel might help.]]

==Increasing Internal Resolution==The so-called "Graphic Packs", Some games'''not to be confused with Texture Packs (since CEMU can't use them for that functionality yet),''' allow for upscaling transferable caches may cause slowdowns on some graphics cards like the in-game graphics to higher resolutions than in GeForce GTX 970. If this is the originalcase, as well as other basic rendering options (shadow resolution/quality, post-processing effects like bloom, lightning you will have to generate your own shaders and godrays, custom anti-aliasing)delete the ones you downloaded. It can affect what resolution In the game is rendered as, as well as shaderscase of the GeForce, also consider deleting the .bin and works as a workaround for some emulation bugs. You can even reduce internal resolution to enjoy a slight FPS increase/toc file in your GLCache at <code>%APPDATA%\NVIDIA\GLCache\(hexstring)\(hexstring)</code>.

Developers plan to add custom texture replacement in ===Native H.264 Decoder===MP4 videos are often encoded for Wii U games with the expectation that the future (hence hardware plays it back on-the name) -fly, but that's yet because the x86 architecture is not PowerPC, this is resource-intensive for Cemu since it has to be seen as of 1run the PowerPC video decoder. An unofficial utility called [https://sshnuke.7net/cemuhook/ Cemuhook] bypasses this by playing H.6264 video directly from Windows codecs that are programmed for x86.

The Graphic Packs themselves come as folders under ===Disable Hyperthreading===Cemu may not be programmed well with hyperthreading. To disable it, go into the graphicPacks directoryTask Manager, right click cemu. You can name exe and then set 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 thisaffinities:

<code>:[[File:[DefinitionProcessor_affinity.png]::titleIds = 0005000010172600,0005000010172700,000500001011b900,000500001014db00,0005000010157e00,0005000010157f00::name = "Bayonetta 1 + 2 - 1080p"::::[TextureRedefine]::width = 1280::height = 720::overwriteWidth = 1920::overwriteHeight = 1080 </code>

In CEMU, under Options/==Graphics PackPacks==To work around emulation bugs and other problems the way [[Dolphin]] does, you'll see this particular graphic pack as "Bayonetta 1+2 Graphic Packs" are title- 1080p"specific property sheets which defines 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 godrays, custom anti-aliasing, 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 aside, there's other issues that stem from the unfinished and unoptimised nature See some of the emulator, like the lack of native H264 video decoding libraries causing green screens and glitchy videos (which is solved with Cemuhook) among other thingscommunity graphics packs at [http://slashiee.github.io/cemu_graphic_packs/ this page].

===Unofficial Builds=Issues==The restricted Patreon early access builds (behind a $5 donation * Save states aren't getting implemented any time soon. This has a month for around two builds), released one week prior lot to do with the public release, have some checks in place. Builds that weren't verified online would have some features restricted impacting performancecomplexity of the Wii U memory layout and architecture, as well as the huge file size. As a ban to result, the original backer if current developers are not interested in implementing them.* The emulator is still unfinished and unoptimised, as noted in the build was shared more than how it reasonably should 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 for personal usetaken into the emulator.

One particular developer, mudlord, who disagreed with ===Piracy===There are anti-piracy measures on the choices made by the CEMU devs, proceeded to release illegal cracked versions of these Patreon early -access builds on his personal blog, ironically also used to expose people breaching licenses for other emulatorsthat are put behind the $5 tier. A Cemu piracy subreddit and discord was even started to discuss Backers putting out these builds and how to can get them. These builds' illegal nature means youbanned if they're unlikely to find them anywhere else. This however stopped with 1.7.5 with him announcing he's not interested any longer in continuing thiscaught, and when the program fails verification, it locks down some features that impact performance.

UnderstandablyUntil 1.7.5 was released, the official CEMU subreddit advises against downloading these mudlord put out cracked versions of early builds, dismissing them as unsafe and malware, with bans for people not heeding this "advice"on his personal blog. However it didn't took too long for malware authors to take advantage of this A subreddit and distribute malicious copies of the early access build according Discord server was made to user reports in the CEMU discuss Cemu piracy subreddit. So use them at your own risk.