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Save disk space for ISOs

460 bytes added, 04:51, 21 February 2020
CHD
* '''Can be reverted?''' Yes, using extractcd (included with MAME)
* '''Playable on Hardware?''' No.
* '''Playable on Emulators?''' Only MAME , DuckStation and DEmul. Some libretro cores for other emulators are starting to add support.
* '''Can process multi track bin files?''' Yes.
PBP is the official format used by Sony for the PS1 Classics on PSP and PS3. Audio tracks may be compressed in ATRAC3 or as raw PCM (unsupported on PS3's ps1_netemu, supported on PSP only by the earliest versions of POPS or the newest ones with the [http://wololo.net/talk/viewtopic.php?f=28&t=41330&start=60 cdda_enabler plugin])
 
===CHD===
* '''Archive-quality dump?''' Yes
* '''Gain:''' Immediate (better than PBP).
* '''Tools Used:''' chdman
* '''Can be reverted?''' Yes, using the same tool (chdman).
* '''Playable on Hardware?''' No.
* '''Playable on Emulators?''' libretro Beetle PSX, Avocado, DuckStation and PCSX ReARMed.
==PlayStation 2==
* '''Can be reverted?''' Yes, using PS3 ISO Rebuilder and an [http://jonnysp.bplaced.net/ IRD file] representing the original file locations. Generic inaccurate JB to ISO conversions possible with makeps3iso (preferred) or genps3iso.
* '''Playable on Hardware?''' Yes - on CFW/HEN
* '''Playable on Emulators?''' ?Yes - RPCS3
For a long time (before the availability of Cobra and Mamba) the only playable format for PS3 backups (relying on little more than "peek and poke" CFW-provided syscalls to mount the game's folder over the currently inserted disc) but also the least accurate one, with significant compatibility issues (varying on whether the backup is stored on an internal or external drive, whether an original game disc is currently inserted, various optional hacks such as "BDMirror" moving the files to the root of the external drive on demand, ...)
A scrubbed and sparse (gap-dropping) format. Unrelated to the PSP's CSO format.
Ideal Great space-saving option for Gamecube games to be played on Nintendont.
===FST (extracted File System) - GC/Wii===
* '''Playable on Emulators?''' Yes - Dolphin
Apart from its previously mentioned unscrubbing/untrimming features mentioned in the above formats' descriptions, NKit is able to convert any ISO (clean dump or otherwise) to and from an [https://wiki.gbatemp.net/wiki/NKit/NKitFormat intermediate format applying various reversible changes] that optimize the image for lossless compression, including full decryption and optionally splitting the often non-unique update partitions to separate files. NKit-GCZ (as well as plain GCZ) is less space efficient than NKit-ISO compressed with a powerful general purpose archiver, however it is directly playable in Dolphin.
NKit ISO is the ideal space-saving option for Gamecube games to be played on a Gamecube.
==Wii U==
* '''Can be reverted?''' No
* '''Playable on Hardware?''' Yes (after installation)
* '''Playable on Emulators?''' ?No
Consisting of a folder containing *.app, *.h3, title.cert, title.tik, and title.tmd files, this official Nintendo format is how tiles are stored on discs and some system titles are stored on the console and is very similar to how titles are stored on the CDN (on the CDN the files are named differently, .app files are encrypted with the title key and common keys and the tmd has a certificate chain on the end that is same for every tmd). This is equivalent to the files contained within a 3DS CIA file; however unlike a 3DS title, converting a disc title to digital does not require modifying the title itself, thus leaving the title's signatures valid.
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