Pack-Ice

Pack-Ice (also called Ice Packer or ICE!) is a file compression program, and associated file format, used on Atari ST computers. It was developed by someone calling himself "Axe of Delight", who later changed his handle to "Axe of Superior".

There are several different versions of the format, and it's not clear how compatible they are.

Pack-Ice is presumably not related to ICEOWS ICE format.

Identification
Apparently, files begin with ASCII "", or (starting with v2.40?) "".

Software

 * unice68
 * Pack-Ice 2.4 (Atari software)
 * Another copy of the above
 * ftp://ftp.untergrund.net/users/ltk_tscc/fujiology/D/DELIGHT/ → ICE*.ZIP: Several versions of Pack-Ice
 * Pack-Ice source code (assembly language)

Sample files

 * http://cd.textfiles.com/atarilibrary/atari_cd07/DISKMAGS/DBAMAG/DBAMAG12/PICTURES/
 * http://sndh.atari.org/sndh/sndh_lf/ → *.sndh
 * https://telparia.com/fileFormatSamples/archive/packIce/

Links

 * , from the Atari Forum Wiki
 * Packing Algorithms, by Axe of Superior