Micrognosis Compression Archiver
From Just Solve the File Format Problem
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(Created page with "{{FormatInfo |formattype=electronic |subcat=Archiving |released=1994? }} '''Micrognosis Compression Archiver''', sometimes called '''MAR''', is a compressed archive utility fo...") |
Revision as of 16:10, 4 September 2020
Micrognosis Compression Archiver, sometimes called MAR, is a compressed archive utility for DOS (and maybe other platforms?).
It's not clear who is responsible for it. Version 1.0 says:
Original Version By: Stratus VOS 11.5 Version by: Haruhiko Okumura Richard Schiller
Format details
MAR uses generalized LHA format, with some custom compression schemes.
| ID | Description and remarks |
|---|---|
hf0 |
Generic Huffman |
ah0 |
Adaptive Huffman |
ari |
Arithmetic |
It also uses the standard "lh0" scheme, for uncompressed files.
The documentation lists more compression schemes, but they don't seem to be implemented:
| ID | Description and remarks |
|---|---|
arn |
Arithmetic N |
lzs |
LZS IDX-12,13,14/LEN-3,4,5. (Don't know if this was intended to be the same as LArc's lzs scheme.)
|
lzw |
LZW BIT-12,13,14/LZW-fix,var |
Identifiers
The executable file is named "MAR.EXE". MAR does not seem to have a standard filename extension, though one might logically use .MAR.
