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Compressed ISO
Filename extension .cso
Internet media type application/x-compressed-iso
Developed by Booster
Type of format Disk image
Container for ISO images

.CSO is a compression method for the ISO image format. It is used to compress dumped PlayStation Portable UMD games, and is an alternative to the .DAX compression method. It is also sometimes called "CISO".

It was the first compression method for ISO. It was created so that more memory space can be saved. Booster created the first code; it was later optimized for better compression. Other formats tried to replace it by fixing up certain issues such as lag in games, such as .DAX and .JSO. However at the time, the popular application homebrew "DevHook" used CSO. .DAX needed another loader, and .JSO was basically unused.

CSO provides nine levels of compression. While the highest levels of compression can introduce slowdown and lengthy load-times in software which relies heavily on disc streaming, even the lower levels are capable of substantial compression.[1] This is partially due to the data layout of a UMD, though more frequently due to the use of Dummy Files as both an anti-piracy tool and a means to more optimally lay the data out physically on the disc.

In addition to being used for compressing PlayStation Portable UMD games, the PSP port of PicoDrive supports compressed Sega Mega-CD disc images in the CSO format.[2]

References[edit]

  1. ^ "CSO compression". Archived from the original on 23 February 2008. Retrieved 2008-02-28. 
  2. ^ "PicoDrive for PSP v1.35b - bugfixes and major feature added". Archived from the original on 12 December 2007. Retrieved 2007-12-11. 

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/.CSO — Please support Wikipedia.
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Nooga.com

Nooga.com
Wed, 23 Apr 2014 11:56:15 -0700

Play Along with the CSO invites musicians from the community to join professional musicians for an afternoon of music at the Chattanooga Market. The program is open to musicians over 18. Cost to enter is $35. Three separate time slots are available ...
 
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Tue, 22 Apr 2014 13:46:03 -0700

The IT staff at Iowa State University have disclosed a data breach involving five departmental servers on campus. CSO |Apr 22, 2014 1:36 PM. Iowa State University · data breach disclosure · network-attached devices. In a notice to existing and former ...
 
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Wed, 23 Apr 2014 06:30:00 -0700

Ilio Kolochenko, CEO of High-Tech Bridge, a Swiss information security company, gave the keynote address on governments' role in cybersecurity this past Sunday at the Regional cybersecurity Summit in Oman. Before his speech, he talked with CSO about ...

Examiner.com

Examiner.com
Wed, 23 Apr 2014 13:03:45 -0700

The Chicago Symphony Orchestra (CSO) announced yesterday that the architect Frank Gehry will create an original stage design for the ensemble's Pierre Boulez celebration on November 14 and 16th, 2014 at Symphony Center. The performances will ...
 
GenomeWeb
Wed, 23 Apr 2014 09:55:03 -0700

The litigation, which names former Traversa CSO Curt Bradshaw as defendant, is the newest wrinkle in the tumultuous history of the firm. Less than a year ago, its one-time CEO Hans Petersen shot Co-founder and University of California, San Diego ...

The Chattanoogan

Broadway World
Tue, 22 Apr 2014 11:20:04 -0700

The CSO is inviting musicians from the community to once again join professional musicians in their event, Play Along with the CSO. The event will take place on Mother's Day, Sunday, May 11, 2014 from 1:00-3:30pm at the Chattanooga Market. Musicians ...
 
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Tue, 22 Apr 2014 18:30:00 -0700

Verizon's annual data-breach investigations report makes a strong case for behavioral analytics technology that looks for anomalies among user activity to spot hackers. Such technology could help detect the use of stolen credentials, which were one of ...

Chicago Classical Review

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Fri, 18 Apr 2014 13:25:17 -0700

The two hours of American music presented by Leonard Slatkin and the Chicago Symphony Orchestra Thursday night adds up to about twice as much homegrown repertory as is being performed by the CSO in the entire 2014-15 season. That's right: one hour ...
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