Details: File format summary

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Summary
Name	WRAptor Compressed File
Version	1; 2; 3
Other names
Identifiers	PUID: fmt/1611
Family
Classification
Disclosure
Description	WRAptor Compressed File is a format which was written by Bill Lucier, copyrighted in 1995, distributed by Loadstar and updated by Doreen Horne. This format is an uncommon compression format, capable of handling PRG, SEQ, USR and GEOS files (Sequential and VLIR), but not REL files. It utilizes a variant of the LZ (Lempel-Ziv) compression algorithm, starting at 9 bits per code. The 4-byte signature of this format is "FF 42 4C FF", with bytes 42 and 4C representing the authors initials in ASCII - "BL". There are three versions of this format, all beginning with same magic bytes. The versions differentiate in their file extension with the v1 and v2 using .wra and the final v3 using .wr3. This entry records all versions of this file format. The complete manual of how to handle the software and this format is included with the reference links.
Orientation
Byte order
Related file formats	None.
Technical Environment
Released
Supported until
Format Risk
Developed by	None.
Supported by	None.
Source	The National Archives and Records Administration / The National Archives and Records Administration
Source date	26 Jan 2022
Source description
Last updated	26 Jan 2022
Note	http://unusedino.de/ec64/technical/formats/wra-wr3.html http://www.zimmers.net/anonftp/pub/cbm/c64/archivers/Wraptor-3.0.readme