OS/2 PACK archive

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** [https://archive.org/details/os2sharewarebbs OS/2 Shareware BBS Full Collection] → 33-VDrivers.zip → cirrus1.zip → UNPACK.EXE
 
** [https://archive.org/details/os2sharewarebbs OS/2 Shareware BBS Full Collection] → 33-VDrivers.zip → cirrus1.zip → UNPACK.EXE
 
* [https://archive.org/details/os2sharewarebbs OS/2 Shareware BBS Full Collection] → 10-Tools.zip → warptlk3.zip → TOOLKIT/BIN/PACK.EXE
 
* [https://archive.org/details/os2sharewarebbs OS/2 Shareware BBS Full Collection] → 10-Tools.zip → warptlk3.zip → TOOLKIT/BIN/PACK.EXE
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Other:
 
* {{Deark}}
 
* {{Deark}}
  

Revision as of 12:19, 7 June 2024

File Format
Name OS/2 PACK archive
Ontology
Extension(s) .??_, .??@, others

OS/2 PACK archive is a compressed archive format used for software installation on OS/2.

This article covers the format with signature bytes a5 96 fe ff. For signature a5 96 fd ff, see OS/2 PACK2 archive.

PACK format is generally associated with the OS/2 PACK.EXE and UNPACK.EXE utilities.

Contents

Format details

Compression scheme

The compression is a kind of LZW with 12-bit codes. Code 0 marks the end of data; codes 1-256 are literals; 257-4095 are dynamic. If the code table is full, the least-recently-used leaf code is reused.

This is the same compression used by LoadDskF/SaveDskF.

Other format details

The format supports OS/2 extended attributes, compressed independently following the compressed file data.

Identification

Files start with bytes a5 96 fe ff.

Software

OS/2 software:

Other:

Sample files

Personal tools
Namespaces

Variants
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