OS/2 PACK archive
From Just Solve the File Format Problem
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=== Other format details === | === Other format details === | ||
| − | The format | + | The format supports OS/2 extended attributes, compressed independently following the compressed file data. |
== Identification == | == Identification == | ||
Latest revision as of 14:50, 28 April 2024
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 |
[edit] Format details
[edit] 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.
[edit] Other format details
The format supports OS/2 extended attributes, compressed independently following the compressed file data.
[edit] Identification
Files start with bytes a5 96 fe ff.
[edit] Software
OS/2 software:
- UNPACK.EXE (Included with OS/2; also found in other packages.)
- OS/2 Shareware BBS Full Collection → 33-VDrivers.zip → cirrus1.zip → UNPACK.EXE
- OS/2 Shareware BBS Full Collection → 10-Tools.zip → warptlk3.zip → TOOLKIT/BIN/PACK.EXE
- Deark
