SCRNCH

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'''SCRNCH''' is a file compression utility for DOS. It can do executable compression of [[DOS executable (.com)|.COM]] files, and can create self-extracting files. It was developed by Graeme W. McRae, and distributed as shareware.
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'''SCRNCH''' is an executable compression utility for DOS. It was developed by Graeme W. McRae, and distributed as shareware.
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== Discussion ==
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SCRNCH is fundamentally a [[DOS executable (.com)|COM]] file compressor, but it includes tools that make it possible to compress [[MS-DOS EXE|EXE]] files, using a convoluted method of converting them to a COM or COM-like format that SCRNCH can compress, then back to EXE if necessary.
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SCRNCH also has a feature it calls "write mode", which essentially creates self-decompressing files. In the simplest case, it converts a text file to a COM file that, when executed, prints the text to the screen. With effort, it can be used for other things, like software installation.
  
 
== Identification ==
 
== Identification ==
SCRNCHed files are [[DOS executable (.com)|.COM]] files. ''[More research needed. [[TrID]] has signatures (→ TrIDScan → TrID XML defs (7Z) → com-scrnch.trid.xml), but as of this writing, they don't seem very robust.]''
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''(TODO)''
  
 
== Related formats ==
 
== Related formats ==
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* {{CdTextfiles|carousel/013C/SCRNCH.ZIP|SCRNCH v1.00}} (1988-01-31)
 
* {{CdTextfiles|carousel/013C/SCRNCH.ZIP|SCRNCH v1.00}} (1988-01-31)
 
* {{CdTextfiles|simtel/simtel9510/disk2/DISC2/COMPRESS/SCRNC102.ZIP|SCRNCH v1.02}} (1988-03-28 / 1988-04-04)
 
* {{CdTextfiles|simtel/simtel9510/disk2/DISC2/COMPRESS/SCRNC102.ZIP|SCRNCH v1.02}} (1988-03-28 / 1988-04-04)
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* [{{SACFTPURL|pack|dese2b10.zip}} DeSCRE2B] - Utility to help decompress SCRNCHed EXE files

Revision as of 17:20, 10 October 2021

File Format
Name SCRNCH
Ontology
Released 1988

SCRNCH is an executable compression utility for DOS. It was developed by Graeme W. McRae, and distributed as shareware.

Contents

Discussion

SCRNCH is fundamentally a COM file compressor, but it includes tools that make it possible to compress EXE files, using a convoluted method of converting them to a COM or COM-like format that SCRNCH can compress, then back to EXE if necessary.

SCRNCH also has a feature it calls "write mode", which essentially creates self-decompressing files. In the simplest case, it converts a text file to a COM file that, when executed, prints the text to the screen. With effort, it can be used for other things, like software installation.

Identification

(TODO)

Related formats

  • ZIP - Reportedly[1], ZIP's Reduce compression method is based on SCRNCH's compression method.

Software

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