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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.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
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4041713 news items

The Press

Chicagoist
Mon, 24 Nov 2014 12:03:45 -0800

The Tribune recently mused on the benefits of the Chicago Symphony Orchestra's touring to keep up their "world class" status. And it got us thinking—what makes the CSO, or any orchestra, world class? Certainly, touring the world, even when not ...

Chicago Classical Review

Chicago Tribune
Fri, 21 Nov 2014 07:56:40 -0800

He had no trouble transferring his ideas about balance, scale, articulation and phrasing to the various CSO soloists and accompanying chamber groups, leaving them free to realize the tonal possibilities of working in their natural musical environment.
 
Chicago Tribune
Sat, 15 Nov 2014 08:15:16 -0800

Whereupon an ensemble of 18 CSO musicians and guests under conductor Pablo Heras-Casado (Cliff Colnot did the musical preparation, though he was uncredited in the printed program) furnished examples of Boulezian elaboration – the expansion of his ...

CSO Online

CSO Online
Tue, 25 Nov 2014 12:26:27 -0800

On Monday, Sony Pictures was forced to disable their corporate network after attackers calling themselves the GOP (Guardians of Peace) hijacked employee workstations in order to threaten the entertainment giant. Now, new information suggests that the ...
 
Chicago Tribune
Sat, 08 Nov 2014 08:40:31 -0800

The last CSO music director to take these "pop concerts" seriously was Jean Martinon, and they ended after he left the orchestra in the late 1960s, meaning that a lot of musical chestnuts disappeared from the schedule unless it was convenient for the ...

CoinTelegraph

CoinTelegraph
Tue, 25 Nov 2014 04:18:09 -0800

Bitcoin infrastructure provider and Bitcoin transaction processing startup BitFury Group adds Samsung Electronics President and Chief Strategy Officer to its strategic advisory board. BitFury CEO Valery Vavilov stated in an official announcement: "We ...

Newstalk 106-108 fm

RTE.ie
Wed, 26 Nov 2014 03:02:54 -0800

The increase in the numbers at work was driven by a jump of 26,100 in full-time employment and a rise of 1,500 in those employed on a part-time basis. The CSO said there has now been eight successive quarters showing an annual increase in employment.
 
GlobeNewswire (press release)
Tue, 25 Nov 2014 23:30:00 -0800

Gothenburg, Sweden, 2014-11-26 08:30 CET (GLOBE NEWSWIRE) -- Immunicum AB (publ) today announced that the company's founder and Chief Scientific Officer, Alex Karlsson-Parra, has been awarded the Athena Prize for his creative and innovative ...
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