http://fileformats.archiveteam.org/index.php?action=history&feed=atom&title=MSZIP 2026-04-23T05:57:47Z Revision history for this page on the wiki MediaWiki 1.19.2 http://fileformats.archiveteam.org/index.php?title=MSZIP&diff=34646&oldid=prev 2020-02-02T21:13:33Z

<p>Created page with &quot;{{FormatInfo |formattype=electronic |subcat=Compression }} &#039;&#039;&#039;MSZIP&#039;&#039;&#039; (Microsoft ZIP) is a compression scheme used in some Microsoft formats. It is an extension of [[DEFLATE]...&quot;</p> <p><b>New page</b></p><div>{{FormatInfo<br /> |formattype=electronic<br /> |subcat=Compression<br /> }}<br /> '''MSZIP''' (Microsoft ZIP) is a compression scheme used in some Microsoft formats. It is an extension of [[DEFLATE]]. It is simpler than [[zlib]], but similar in concept.<br /> <br /> It is one of the compression options in [[Cabinet|CAB]] format, and in [[MS-DOS installation compression]].<br /> <br /> == Format details ==<br /> The uncompressed data is divided into blocks of at most 32KB. Each block is compressed using [[DEFLATE]]. Two signature bytes, ASCII &quot;CK&quot;, are prepended to each block. Exactly how the compressed blocks are stored in the file depends on the file format.<br /> <br /> The blocks are ''not'' compressed completely independently. The 32KB DEFLATE history buffer is maintained between blocks, though the Huffman trees are discarded.<br /> <br /> == Specifications ==<br /> * [https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/ms-mci/27f0a9bf-9567-4e40-ad66-6ae9ab9d2786 &amp;#x5b;MS-MCI&amp;#x5d;: Microsoft ZIP (MSZIP)]<br /> <br /> [[Category:Microsoft]]</div>

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