WRAptor Compressed File

Summary

Name

WRAptor Compressed File

Version

1; 2; 3

Identifiers

PUID: fmt/1611

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.

Note

http://unusedino.de/ec64/technical/formats/wra-wr3.html http://www.zimmers.net/anonftp/pub/cbm/c64/archivers/Wraptor-3.0.readme

File extensions

wra, wr3

Source

The National Archives and Records Administration / The National Archives and Records Administration

Internal signatures

Changelog

• Added in V101

  Release date

  15 February 2022

  WRAptor Compressed File: Signature researched and samples provided by The National Archives and Records Administration.

  WRAptor Compressed File: Full entry added. Submitted by The National Archives and Records Administration.