OS/2 PACK archive
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'''OS/2 PACK archive''' is a compressed archive format used for software installation on OS/2. | '''OS/2 PACK archive''' is a compressed archive format used for software installation on OS/2. | ||
| − | + | There are at least four versions of it, possibly more. For the version that starts with bytes <code>a5 96 fd ff</code>, see [[OS/2 PACK2 archive]]. | |
PACK format is generally associated with the OS/2 PACK.EXE and UNPACK.EXE utilities. | PACK format is generally associated with the OS/2 PACK.EXE and UNPACK.EXE utilities. | ||
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== Identification == | == Identification == | ||
| − | Files start with bytes {{magic|a5 96 fe ff}}. | + | Files start with bytes {{magic|a5 96}}, followed by {{magic|00 14}}, or {{magic|ff ff}}, or {{magic|fe ff}}. |
| + | |||
| + | See also [[OS/2 PACK2 archive#Identification]]. | ||
== Software == | == Software == | ||
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== Sample files == | == Sample files == | ||
| + | Version "<code>00 14</code>": | ||
| + | * {{CdTextfiles|hobbesos29503/2_1/DRIVERS/NCRVID21.ZIP|NCRVID21.ZIP}} → os2vid21.img → *.??@ | ||
| + | |||
| + | Version "<code>ff ff</code>": | ||
| + | * [https://archive.org/details/The_Arsenal_Files_Arsenal_Computer The Arsenal Files] → OS2_APP/CS0054-2.DSK → FIX/CS2/*.??@ | ||
| + | |||
| + | Version "<code>fe ff</code>": | ||
* {{CdTextfiles|pier03/035/vpeval.zip|vpeval.zip}} | * {{CdTextfiles|pier03/035/vpeval.zip|vpeval.zip}} | ||
* {{CdTextfiles|cream05/os2/aoacsd2a.zip|aoacsd2a.zip}} | * {{CdTextfiles|cream05/os2/aoacsd2a.zip|aoacsd2a.zip}} | ||
Revision as of 14:49, 27 June 2024
OS/2 PACK archive is a compressed archive format used for software installation on OS/2.
There are at least four versions of it, possibly more. For the version that starts with bytes 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, followed by 00 14, or ff ff, or fe ff.
See also OS/2 PACK2 archive#Identification.
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
Other:
Sample files
Version "00 14":
- NCRVID21.ZIP → os2vid21.img → *.??@
Version "ff ff":
- The Arsenal Files → OS2_APP/CS0054-2.DSK → FIX/CS2/*.??@
Version "fe ff":
