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 | + | There are at least four or five versions of it. 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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=== Other format details === | === Other format details === | ||
| − | + | Some versions of the format support [[OS/2 extended attributes]], compressed independently following the compressed file data. | |
== Identification == | == Identification == | ||
| − | + | Known versions of the format start with one of the following byte sequences: | |
| + | a5 96 00 14 | ||
| + | a5 96 14 0a | ||
| + | a5 96 ff ff | ||
| + | a5 96 fe ff | ||
| − | See also [[OS/2 PACK2 archive#Identification]]. | + | See also [[OS/2 PACK2 archive#Identification]] (<code>a5 96 fd ff</code>). |
== Software == | == Software == | ||
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Version "<code>00 14</code>": | Version "<code>00 14</code>": | ||
* {{CdTextfiles|hobbesos29503/2_1/DRIVERS/NCRVID21.ZIP|NCRVID21.ZIP}} → os2vid21.img → *.??@ | * {{CdTextfiles|hobbesos29503/2_1/DRIVERS/NCRVID21.ZIP|NCRVID21.ZIP}} → os2vid21.img → *.??@ | ||
| + | |||
| + | Version "<code>14 0a</code>": | ||
| + | * {{CdTextfiles|pier01/029a/40x9su32.zip|40x9su32.zip}} → 4029SU3.ZIP → *.??@ | ||
Version "<code>ff ff</code>": | Version "<code>ff ff</code>": | ||
Latest revision as of 13:02, 2 July 2024
OS/2 PACK archive is a compressed archive format used for software installation on OS/2.
There are at least four or five versions of it. 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 |
[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
Some versions of the format support OS/2 extended attributes, compressed independently following the compressed file data.
[edit] Identification
Known versions of the format start with one of the following byte sequences:
a5 96 00 14 a5 96 14 0a a5 96 ff ff a5 96 fe ff
See also OS/2 PACK2 archive#Identification (a5 96 fd 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
Other:
[edit] Sample files
Version "00 14":
- NCRVID21.ZIP → os2vid21.img → *.??@
Version "14 0a":
- 40x9su32.zip → 4029SU3.ZIP → *.??@
Version "ff ff":
- The Arsenal Files → OS2_APP/CS0054-2.DSK → FIX/CS2/*.??@
Version "fe ff":
Assorted versions:
