Compressed Hunks of Data

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|released=2007<ref>[https://github.com/mamedev/mame/commit/7b77f1218624ea26dbb2efd85a19f795f5d4e02e Initial checkin of MAME 0.121. - GitHub]</ref>
 
|released=2007<ref>[https://github.com/mamedev/mame/commit/7b77f1218624ea26dbb2efd85a19f795f5d4e02e Initial checkin of MAME 0.121. - GitHub]</ref>
 
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'''CHD''' (Compressed Hunks of Data) is a lossless compression format originally developed for [https://www.mamedev.org MAME (which in turn originally stood for Multiple Arcade Machine Emulator)], for the hard-drive contents of certain arcade machines. It has since been used in several other emulators as a means of storing CD-ROM game data. For CD-based games, it compresses the contents of a disc image (e.g. <code>.cue</code> + <code>.bin</code> files) to a single <code>.chd</code> file.<ref>[https://retropie.org.uk/docs/CHD-files CHD files - RetroPie Docs]</ref>
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'''CHD''' (Compressed Hunks of Data) is a lossless compression format originally developed for [[MAME]], for the hard-drive contents of certain arcade machines. It has since been used in several other emulators as a means of storing CD-ROM game data. For CD-based games, it compresses the contents of a disc image (e.g. <code>.cue</code> + <code>.bin</code> files) to a single <code>.chd</code> file.<ref>[https://retropie.org.uk/docs/CHD-files CHD files - RetroPie Docs]</ref>
  
 
== Examples ==
 
== Examples ==
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== Links ==
 
== Links ==
* [https://www.mamedeev.org MAME project page]
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* [https://www.mamedev.org MAME project page]
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* [https://docs.mamedev.org/tools/chdman.html chdman – CHD (Compressed Hunks of Data) File Manager - MAME Documentation]
 
* [https://github.com/mamedev/mame/blob/master/src/lib/util/chd.h chd.h - GitHub]
 
* [https://github.com/mamedev/mame/blob/master/src/lib/util/chd.h chd.h - GitHub]
  
 
== References ==
 
== References ==
 
<references/>
 
<references/>

Latest revision as of 17:50, 1 August 2025

File Format
Name Compressed Hunks of Data
Ontology
Extension(s) .chd
Released 2007[1]

CHD (Compressed Hunks of Data) is a lossless compression format originally developed for MAME, for the hard-drive contents of certain arcade machines. It has since been used in several other emulators as a means of storing CD-ROM game data. For CD-based games, it compresses the contents of a disc image (e.g. .cue + .bin files) to a single .chd file.[2]

[edit] Examples

Create a chd from cue file (bin file must also be accessible):

 chdman createcd -i example.cue -o example.chd

[edit] Links

[edit] References

  1. Initial checkin of MAME 0.121. - GitHub
  2. CHD files - RetroPie Docs
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