View source for Micrognosis Compression Archiver

{{FormatInfo
|formattype=electronic
|subcat=Archiving
|released=1994?
}}
'''Micrognosis Compression Archiver''', sometimes called '''MAR''', is a compressed archive utility for DOS (and maybe other platforms?).

The software is a bit vague about who exactly is responsible for it. No doubt Haruhiko Okumura had a lot to do with it, but it would be nice to have independent confirmation of a connection between him and Micrognosis. The credits for version 1.0 say:
 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:

{| class="wikitable"
! ID !! Description and remarks
|-
|<code>-hf0-</code> || Generic Huffman
|-
|<code>-ah0-</code> || Adaptive Huffman
|-
|<code>-ari-</code> || Arithmetic
|}

It also uses the standard "<code>lh0</code>" scheme, for uncompressed files.

The documentation lists more compression schemes, but they don't seem to be implemented:

{| class="wikitable"
! ID !! Description and remarks
|-
|<code>-arn-</code> || Arithmetic N
|-
|<code>-lzs-</code> || LZS IDX-12,13,14/LEN-3,4,5. (Don't know if this was intended to be the same as [[LArc]]'s scheme of the same ID.)
|-
|<code>-lzw-</code> || 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'''.

== Software ==
* [https://www.sac.sk/download/pack/mar10.zip Micrognosis Compression Archiver v1.0] 
** [http://mpolibbs.steptail.com/software/DOS/COMPRESS/MAR10.ZIP Another copy]