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==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.
Cemu
,no edit summary
{{Outdated}}
{{Infobox emulator
|logo = Cemu-Logo.png
|version = {{CemuVerVersion|Cemu}}
|active = Yes
|platform = [[Emulators on Windows|Windows]]
|architecture = x86_64
|target = [[Wii U emulators|Wii U]]
|website = [http://cemu.info Cemu]
|license = Closed-source freeware
|compatibility = [https://compat.cemu.info Compatibility list]
|support = [https://www.patreon.com/cemu Patreon]
|bios = [[Emulator_files#Wii_U|Optional]]
}}
'''[[wikipedia:Cemu|Cemu]]''' is a closed-source [[Wii U emulators|Wii U emulator]] for Windows. It is Its development was started circa 2015 and it's known to be the very first Wii U emulator ever that can boot games. 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].
Before updates are publicly released, they're accessible to backers over at [https://www.patreon.com/cemu their Patreon].
==DownloadsDownload==* {| cellpadding="4"|align=center|{{Icon|Win-big}}|'''[http://cemu.info/index.html#download Latest public release]'''<br/><small>Available one week after the Patreon builds release</small>|}
==System requirements==
===Minimum===
* Windows 7 (64-bit)
* Graphics Card: Supports at least OpenGL 4.5 or Vulkan 1.1
* Memory: 4 GB
===Recommended===
* Windows 10 (64-bit)
* Graphics Card: Supports OpenGL 4.6 (avoid integrated graphicsVulkan 1.1 for AMD or Intel)
* Memory: 8 GB or more
==Game Formats formats and Files Neededneeded files=====Physical Dumpsdumps===
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 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 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 CDN for Wii U and 3DS digital games is rather poorly secured , due to a huge oversight when designing Wii U/3DS the software protectionfor these consoles. 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.
*Run the game to update the UI and show the update and/or DLC version
===Amiibo Supportsupport===
[[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). There's a regularly updated complete set of the official ones but there are also unofficial spoofed packs on various other sites.
Recent versions of Cemu include Amiibo support. Simply go to NFC / Scan NFC Tag from file, and load the relevant .bin file. Keep in mind Amiibo support in Cemu is incomplete right now and not all figurines are compatible yet - though incompatibilities may be caused by bad Amiibo dumps as well.
==Setting Up up Cemu==
===Controls===
Cemu added native support for Wii Remote controllers as of 1.12.0.
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.
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. ===Shader Cachescaches===
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 speeding up=====ShadercachesShader caches===Shaders are normally cached as you play the game. This can cause a lot of stutters and slow the game down. However, as of version 1.19.0, Cemu added support for Asynchronous Shader Compiling on their Vulkan API which can make shader compiling near instantaneous on modern hardware, so try enabling that before hunting for shader caches.
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, which is why using Asynchronous Shader Compiling is recommended instead.
[[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 Graphic 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.
See some of the community graphics packs at [http://slashiee.github.io/cemu_graphic_packs/ this page].
==External links==
* [httphttps://compatwiki.cemu.info/ Compatibility listwiki/Main_Page Wiki]
* [https://discord.gg/5psYsup Discord]
[[Category:Emulators]]
[[Category:Console emulators]]
[[Category:Home console emulators]]
[[Category:Wii U emulators]]
[[Category:Windows emulation software]]
[[Category:Closed-source emulators]]
