#PKWARE SECUREZIP 12.5 ARCHIVE#

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 (released on March 15, 1990): New features included authenticity verification, 'mini' PKSFX self-extracting module, integrating self-extracting module into ZIP2EXE, ability to save & restore volume labels.

#PKWARE SECUREZIP 12.5 ARCHIVE#

OS/2 version added ZIP2EXE and 2 self-extracting archive headers.

PKZIP 1.02 (released on October 1, 1989) 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.

PKZIP 1.01 (released on July 21, 1989) added Implode compression, while reduced files can only be extracted from ZIP archive.

New tools included with PKZIP include PKZipFix.

PKZIP 0.92 (released on March 6, 1989): 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 (released on February 10, 1989) supported reducing algorithm (from SCRNCH by Graeme McRae) with four compression settings and shrinking.

PKZIP 0.8 (released on January 1, 1989) initial version.

The first version was released in 1989, as a DOS command-line tool, distributed under shareware model with a US$25 registration fee (US$47 with manual).

Pkware securezip 12.5