LArc
From Just Solve the File Format Problem
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== Identification == | == Identification == | ||
One of the listed 5-character LArc compression scheme IDs appears at offset 2. | One of the listed 5-character LArc compression scheme IDs appears at offset 2. | ||
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| + | === Identification of self-extracting archives === | ||
| + | LArc (v3.33, at least) can create self-extracting archives in either [[DOS executable (.com)|COM]] or [[MS-DOS EXE|EXE]] format (depending on the archive size, apparently). The ASCII substring "{{magic|SFX by LARC}}" appears at offset 32 for EXE format, or offset 526 for COM format. | ||
== Software == | == Software == | ||
Revision as of 18:29, 1 December 2021
LArc (not to be confused with LHarc) is a compressed archiver program for DOS. It was developed by Kazuhiko Miki, with Haruhiko Okumura and Ken Masuyama. Its native file format is sometimes called LZS. It uses generalized LHA format, and was possibly the originator of it. It was based in part on Okumura's LZSS software.
See LHA for more information relevant to LArc format.
Contents |
Compression schemes
| ID | Description and remarks |
|---|---|
-lz2- |
|
-lz3- |
|
-lz4- |
Uncompressed |
-lz5- |
LZ77/LZSS, 4k window. Almost identical to "SZDD" used in MS-DOS installation compression. |
-lz7- |
|
-lz8- |
|
-lzs- |
LZ77/LZSS, 2k window |
Identification
One of the listed 5-character LArc compression scheme IDs appears at offset 2.
Identification of self-extracting archives
LArc (v3.33, at least) can create self-extracting archives in either COM or EXE format (depending on the archive size, apparently). The ASCII substring "SFX by LARC" appears at offset 32 for EXE format, or offset 526 for COM format.
Software
- LArc v3.33 (1989-02-25)
- lhasa
- LHa for Unix
(Wanted: Other versions of LArc.)
