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[[#External_links|There is a pull request for * '''Archive-quality dump?''' Yes* '''Gain:''' Immediate (Less than PBP).* '''Tools Used:''' chdman* '''Can be reverted?''' Yes, using the same tool (chdman).* '''Playable on Hardware?''' No.* '''Playable on Emulators?''' Yes - PPSSPP]].
See overview of formats [https://yuzu-emu.org/wiki/overview-of-switch-game-formats/ here].
*[https://github.com/hrydgard/ppsspp/pull/18198 CHD support pull request for PPSSPP]*[https://github.com/86Box/86Box/issues?q=is%3Aissue+is%3Aopen+imageformat+formatlabel%3Afeature+ Various image format feature requests for 86Box]*[https://github.com/joncampbell123/dosbox-x/issues/1822 CHD feature request for DOSBox-X]*[https://github.com/schellingb/dosbox-pure/issues/40 CHD feature request for DOSBox Pure]
→ZAR
:* BIN/ISO is the full disc data, including Audio-CD sound data and game data
:* CUE is the datasheet file
: '''Light Dump:''' ISO + MP3/FLAC/WAV + CUE
:* ISO is the disc data with only the game data
:* MP3/FLAC/WAV is the sound data from the Audio-CD, but these formats take much less disk space
:* CUE is the datasheet file
* '''Gain:''' Several hundreds of MBs to just a few dozens, depending on how much this specific game relies on the Audio-CD sound format
* '''Tools Used:''' Load the BIN+CUE using a virtual drive, then use a CD dumping tool
* '''Can be reverted?''' Yes, just burn the ISO+MP3/FLAC/WAV+CUE again using a CD burner tool (ImgBurner) either to a physical disk or as an ISO+BIN file. Lossy audio formats will result in data loss.
* '''Playable on Hardware?''' No, but can be reverted to be
* '''Playable on Emulators?''' Anything that supports loading from .cue files, or direct from the optical drive (if you use a virtual disc loader like CDEmu). Some aren't compatible with MP3, if that's the case, convert them to WAV with MP32WAV. You may need Sega Cue Maker.
'''Instructions'''
Place the chdman.exe executable and extractcd in the same directory as the dumps you want to compress (dumps must be in BIN+CUE format or GDI). Open Command Prompt or a terminal emulator and navigate to the directory where you placed the chdman.exe executable and input one of the following:* BIN/CUE-GDI to CHD: <code> for /R %i in (*.cue, *.gdi) do chdman createcd -i "%i" -o "%~ni.chd"</code> (Windows) for i in *.(cue|gdi); do chdman createcd -i "$i" -o "${i%.*}.chd"; done (Linux)* CHD to BIN/CUE: <code> for /R %i in (*.chd) do chdman extractcd -i "%i" -o "%~ni.cue"</code> (Windows) for i in *.chd; do chdman extractcd -i "$i" -o "${i%.*}.cue"; done (Linux)
Alternatively, if you only need to do one file you can use this: <code>chdman createcd -i "<FILENAME>.cue" -o "<FILENAME>.chd"</code>
* '''Tools Used:''' [https://github.com/unknownbrackets/maxcso#features maxcso], [https://github.com/ps2homebrew/Open-PS2-Loader/blob/master/pc/ziso.py ziso.py (requires python3 and pip install lz4)], [https://www.psx-place.com/resources/psxiso-compression-tool.1258/ PSXiSO (contains ziso CLI tool)]
* '''Can be reverted?''' Yes, using the same tool. No data loss.
* '''Playable on Hardware?''' YES Yes - Open PS2 Loader.* '''Playable on Emulators?''' NOYes - PCSX2 (since v1.7.5293)<ref>[https://github.com/PCSX2/pcsx2/pullreleases/tag/6594v1.7.5293 v1.7.5293]</ref>
===CHD===
* '''Can be reverted?''' Yes, using the same tool (chdman).
* '''Playable on Hardware?''' No.
* '''Playable on Emulators?''' Yes - PCSX2 (since v1.7.0-dev-1156)<ref>Added in 1150 but wasn't built. 1156 is the first release with CHD support. [https://web.archive.org/web/20210416020418/https://buildbot.orphis.net/pcsx2/index.php?m=fulllistAutomated Pcsx2 builds]</ref>).
==PlayStation 3==
*You can either use [https://github.com/RPCS3/rpcs3/issues/4021#issuecomment-1650682400 this tool], or [https://github.com/ptmorris1/RPCS3-ISOLauncher-Launchbox this one] for playing directly your ISO dumps with RPCS3.
*or create use [https://www.mediafire.com/file/v5yslivyurr5luy/Make_sure_edit_path_locations_first.bat/file this simple batch script; :Mount ] ('''edit path locations first of course''') which mounts your ISO with using powershell commands and launch with launching it using RPCS3 CLI commands; PowerShell Mount-DiskImage -ImagePath """X:\PlayStation 3\TitleName.iso""" explorer.exe "D:" start /d "C:\Users\USERNAME\AppData\and ejecting it when you done with RPCS3\" rpcs3.exe --no-gui "D:" :And here is another batch script for quickly eject mounted ISO from created virtual drive after done emulation; PowerShell Dismount-DiskImage -DevicePath \\.\CDROM0
==PlayStation Portable==
===CHD===
==PlayStation Vita==
==Switch==
===NSZ===
* '''Archive-quality dump?''' Yes
* '''Playable on Hardware?''' No
* '''Playable on Emulators?''' No
It is possible to merge the game base, update and DLCs on a single NSP with the tool [https://github.com/julesontheroad/NSC_BUILDER NSC_Builder] and compress it to NSZ
==Game Boy Advance / Nintendo DS / Nintendo 3DS==
===ZAR===
[https://github.com/xenia-canary/xenia-canary/pull/165 This Pull Request] adds support to [[xenia]] emulator for loading ZAR (ZArchive files) of a decrypted and extracted dump of XBOX 360 game. *The process is basically to dump your disc, extract files using your favorite tool, and create a ZAR file from it using ZArchive toolor [https://github. But for "com/xenia-canary/xenia-canary/pull/299 xenia-canary->create Zar package option].*For digital titles (Xbox 360 Demos, Video DLC and XBLA games" etc) you need to extract the contents from its containers using "[https://digiex.net/threads/wxpirs-extract-content-from-xbox-360-demos-video-dlc-and-arcade-game-containers.9464/ wxPirs]" and then use create a ZAR file from it using the "[https://github.com/Exzap/ZArchive/releases ZArchive]" tool<refor xenia-canary->create Zar package option[https://github.com/xenia-canary/xenia-canary/pull/165#issuecomment-1641099753 Xbox 360 Demos, Video DLC and XBLA games needs extraction before using ZArchive]</ref>.
=Other Tricks=
===NTFS Compression===
You can enable filesystem-level compression (like "NTFS Compression" in Windows) for the directory containing your ISOs/ROMs. This has a very noticeable space gain and doesn't affect the emulator's functionality. It's surprisingly more effective than many people would like to give this credit.
* '''Archive-quality dump?''' Yes
Since this results, in most cases, in very noticeable detrimental effects in gameplay (if the game doesn't crash outright), this is nothing short of mutilating the game image. Sadly enough, some of these dumps make it to sharing sites.
Avoid resorting to destructive modifications since it can lead to random crashes and unexpected behavior, especially in games with lots of shared assets. [[http://emulation.gametechwiki.com/index.php/File_Hashes File hashes|Verify your dumps]] to make sure you don't have these, and if you still want to reduce size, prefer using other methods or uses decompression on demand. One reason to use a destructively modified dump is for burning your own Dreamcast games as GD-ROMs were over a gigabyte in size and CD-Rs top out at 850MB.
* '''Archive-quality dump?''' No (Removes data)
=See also=
*[[List of filetypes]]
=External links=
*[https://github.com/citra-emu/citra/issues/5434 6013 CHD or ZArchive feature requests for citra]
*[https://github.com/RPCS3/rpcs3/issues/4021 CHD or ZArchive feature requests for RPCS3]
*[http://web.archive.org/web/20231127115239/https://github.com/yuzu-emu/yuzu/issues/10025#issuecomment-1493873239 CHD or ZArchive feature requests for yuzu and Ryujinx]
*[https://github.com/xemu-project/xemu/issues/129 CHD or ZArchive feature requests for xemu]
*[https://yuzu-emu.org/entry/yuzu-progress-report-aug-2023/#project-terra yuzu now supports sparse and compressed NCA games]. This means a long list of titles whose eShop releases couldn’t previously boot are now either running or perfectly playable, and their RomFS can be fully dumped.
