MS-DOS installation compression
From Just Solve the File Format Problem
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A pair of compression formats by Microsoft that appear on MS-DOS and early Windows (3.x) installation disks; the formats have no generally agreed-upon name. Compressed files may be generated by the COMPRESS.EXE program (appearing in Microsoft's Setup Toolkit for Visual C++), and uncompressed with the EXPAND.EXE program distributed with Windows and MS-DOS. Compressed files have the last character of the file extension replaced with an underscore (or dollar sign). | A pair of compression formats by Microsoft that appear on MS-DOS and early Windows (3.x) installation disks; the formats have no generally agreed-upon name. Compressed files may be generated by the COMPRESS.EXE program (appearing in Microsoft's Setup Toolkit for Visual C++), and uncompressed with the EXPAND.EXE program distributed with Windows and MS-DOS. Compressed files have the last character of the file extension replaced with an underscore (or dollar sign). | ||
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* [http://www.cabextract.org.uk/libmspack/doc/szdd_kwaj_format.html SZDD and KWAJ formats description] | * [http://www.cabextract.org.uk/libmspack/doc/szdd_kwaj_format.html SZDD and KWAJ formats description] | ||
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[[Category:Microsoft]] | [[Category:Microsoft]] | ||
Revision as of 16:11, 29 March 2016
A pair of compression formats by Microsoft that appear on MS-DOS and early Windows (3.x) installation disks; the formats have no generally agreed-upon name. Compressed files may be generated by the COMPRESS.EXE program (appearing in Microsoft's Setup Toolkit for Visual C++), and uncompressed with the EXPAND.EXE program distributed with Windows and MS-DOS. Compressed files have the last character of the file extension replaced with an underscore (or dollar sign).
There are reports of the Google Chrome installer needing the EXPAND.EXE program.
Identification
File begin with bytes 53 5A 44 44 88 F0 27 33 ("SZDD" variant), or 4B 57 41 4A 88 F0 27 D1 ("KWAJ" variant).
Software
- EXPAND.EXE - utility included with many versions of MS Windows and MS-DOS
- Setup Toolkit for Visual C++
- 7-Zip
- mscompress - msexpand
- libmspack
