Removed tools included BIOSFIX, REZIP, MAKESFX. EAX register was always saved on 80386 or above CPU. Imploding was up to 5X faster and compression ratio was improved over 1.02. PKZIP 1.10 (): New features included Authenticity Verification, "mini" PKSFX self-extracting module, integrating self-extracting module into ZIP2EXE, ability to save & restore volume labels.
#Pksfx pkware archive#
OS/2 version added ZIP2EXE and 2 self-extracting archive headers. PKZIP 1.02 () includes new utility BIOSFIX.COM, which preserved the entire 80386 register set during any mode switches via INT 15H. PKZIP's default compression behavior was changed from fastest (Shrink) to best (Implode). New utility included Thomas Atkinson's REZIP conversion utility (part of ZIP-KIT). Imploding was chosen based on the characteristics of the file being compressed.
#Pksfx pkware zip#
PKZIP 1.01 () added Implode compression, while Reduced files can only be extracted from ZIP archive. New tools included with PKZIP include PKZipFix. PKZIP 0.92 (): In addition to bug fixes, PKZIP included an option to automatically choose the best compression method for each file. In addition to PKZIP and PKUNZIP, it also included ZIP2EXE, which required an external self-extracting executable header created by MAKESFX from the PKZIP executable package. PKZIP 0.9 () supported Reducing algorithm (from SCRNCH by Graeme McRae) with 4 compression settings and shrinking.
#Pksfx pkware registration#
The first version was released in 1989 as a DOS command-line tool, distributed under shareware model with a $25US registration fee ($47US with manual). ARC files, users began recompressing any old archives that were currently stored in. Led by BBS Sysops who refused to accept or offer files compressed as. Although SEA won the suit, it lost the compression war, as the user base migrated to PKZIP as the compressor of choice.
The announcement had been made following the ARC lawsuit between System Enhancement Associates (SEA), Inc. The development of PKZIP was first announced in the file SOFTDEV.DOC from within the PKPAK 3.61 package, stating it would develop a new and yet unnamed compression program. Cooper's DWC, LHarc by Haruhiko Okomura and Haruyasu Yoshizaki and ARJ which stands for "Archived by Robert Jung". Other archivers also appeared during the 1980s, including Rahul Dhesi's ZOO, Dean W. These archives can optionally be passed though a stream compressor utility, such as compress and others. These utilities were designed to gather a number of separate files into a single archive file for easier copying and distribution. They include the Unix utilities ar, shar, and tar. File compression routines date back to at least the 1960s: IBM had a compression program called SQUOZE that was commonly used to pack programs on the 7 mainframes as part of the SHARE operating system.īy the 1970s file archiving programs were distributed as standard utilities with operating systems.
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