Changes

{{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 improvements. The paid version has a simple DRM in place doing a regular online verification, though some dedicated open-source advocates like on mudlord's blog regularly post early pirated copies of that version with the DRM removedtheir 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

==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 Run the game at least once .* Open "Check Cemu's log.txt" file and find "TitleId of launched game" followed by look for a 16-digit number. Copy down line that 16-digit numbersays "Mounting local storage (AOC): . \mlc01\usr\title\NUMBERS\NUMBERS\aoc\"* Go to Add (create) folders with the same name as the above (substituting the "NUMBERS" bit with the actual numbers) in your "CEMUFOLDERCemuFOLDER/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 Add any updates (which must be added first) you want to the "CemuFOLDER/mlc01/usr/title/NUMBERS/NUMBERS/" folder.* To apply DLC create a folder inside of the folder with your update and create Create a folder named "aoc" and put the DLC files into there . The "code", "content", and simply run "meta" folders of the actual gameitself also go in the "aoc" folder.

To add DLC ===Amiibo Support===[[Amiibo]] are hard-to -find 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 (. *Check Cemubin files). There'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's 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)

As Cemu added native support for Wii Remote controllers as of 1.712.0. Cemu cannot connect to a real (or emulated) [[Nintendo 3DS emulators|3DS]]. ===Cemuhook===Using this is completely optional.3d Download [http://sshnuke.net/cemuhook/ the latest version] compatible with your Cemu version, unpack it to the Wii U GamePad 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 Wii U Classic Controller are emulatedlatest GPU driver installed, but as well as both x86 and x64 versions of the Wiimote still isn't emulated yet[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. You can set up Accept to download the missing shared fonts as well to 8 GamePads make text in the menu if you wantsome games (Super Mario Maker among others) display correctly.

Emulated Wii U GamePad features are as follow: * Touch Controls: Mouse left clickEnabling "GX2SetGPUFenceSkip (HACK)" enhances graphical emulation in BOTW in particular.* Tilting and Gyro Controls: Holding the mouse rightA pre-click and dragging. It's lacking Z-axis key binding at the moment.* Switch Screens between TV and GamePad: installed Graphical Pack that comes with recent versions of Cemuhook, "TABLWZX Crash Workaround" key, as well as the "Ctrl+TABGX2DrawDone()" option under Experimental, should help with some general crashes specific to keep focus. TV by default.* Microphone: Spoofed, a configurable key simulates blowing on the micBOTW.

A menu allows ===Shader Caches===When your game is loaded, check for loading NFC tags 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 match your game version's ID to spare yourself most of that unpleasant experience. Just keep in mind that shader caches from Amiibosversions older than 1.8.0 are incompatible with later versions of Cemu. (More details would be appreciated)

As At startup, Cemu will prepare a compiled version of nowthat cache under <code>.\Cemu\shaderCache\precompiled</code> and that one depends on your GPU driver, no online features so you might want to erase it if any problems or 3DS/Wii U connectivity features are possiblecrashes when compiling shaders at startup occur.

==Improving PerformanceTroubleshooting/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 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:

==ReferencesGraphics Packs=={{reflist}}To work around emulation bugs and other problems the way [[Dolphin]] does, "Graphic Packs" are title-specific property sheets which defines 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 godrays, 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 unoptimised, 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.