7/23/92

Joe Pantuso
PKWARE Inc.

I thought people might be interested in looking at the preliminary version
of the "what's new" file for PKZIP 2.

Note that this is very brief/vague/incomplete.

New stuff in PKZIP 2
====================
PKZIP
-----

- New compression algorithm

- Novell Netware support

- Four levels of speed/compression plus "zero" compression (storage only)

- Storage of empty subdirectories

- Creation multi-volume archives.  PKZIP will also format disks as it
  goes if necessary, otherwise using whatever free space is available
  on each formatted disk.  This feature can use any standard and
  removeable DOS device.

- "Compatibility" file opening mode.  (-=)
  Opposite of "Share" mode.  Helps overcome some network situations where
  a file would be locked otherwise.

- Improved archive attribute support. (-a+/-i/-i-)

- Improved date range support. (-t/-T)


PKUNZIP
-------

- When PKUNZIP detects existing files it now checks before overwriting
  files (y/n/a/r)=Yes/No/All/Rename.  Rename will prompt for a new name,
  All will cause PKUNZIP to continue as though -o had been specified on
  the command line.

- Exclusion of list files (-x@file.lst)

- View option now supports pause as well as technical view (-vm/-vt)


BOTH
----

- Expanded documentation. Including tutorial, "How PKZIP works", Special
  section on encryption, Using List files.  The "How..." section includes
  a theoretical explanation of how compression works (for interested
  folk--not a technical discussion) as well as a general explanation of
  how a file is structured and what happens when PKZIP does it's thing.

- EMS/XMS support. DPMI Usage.  EMS/XMS support reduces conventional
  memory use significantly.

- PKZIP/PKUNZIP now can use 386 instructions, EMS XMS and DPMI in a DOS box
  under OS/2 2.0 or above  (Previous versions of OS/2 did not support 386
  instruction usage properly so when PKZIP detects a lower version of OS/2
  it will disable this ability).

- Creation of List files by PKZIP and PKUNZIP.

- New improved (very strong) AV feature

- The size of list file that can be read has be increased to 5000-9700 bytes
  (from 2000-4000)

- Handy information display shows XMS/EMS/Net use and type of compression
  and CPU type detected.

- PKSFXjr can now use an output path, it previously could only outp

- ZIP2EXE Accepts output path

- ZIP2EXE can now reverse the process with -x

- The -s "Password" option can now accept input from the keyboard directly.
  This allows complex passwords to be entered more easily.

- Problems with display of View and Percent complete when working with files
  of 100 megabytes or greater have been fixed.

- New "Mini" PKUNZIP called PKUNZJR.EXE is less than 3k in size and uses
  very little memory.  Limited to ZIP files containing less than 500 files.

- 386 instruction/EMS/XMS/DPMI offered in DOS session under OS/2 2.0
  (Previous versions of OS/2 did not support these features properly,
  so PKZIP would disable it's usage of 386 instructions)

- Volume Label is displayed as single string instead of 8.3 format
  used previously (i.e. "PKWARE VOL" rather than "PKWARE V.OL"

- View option now supports pause between screens w/more (-vm[...])
  View order can be reversed by adding 'r' to -v option. (-vr[...])

- Any ANSI codes detected in file names or comments are suppressed,
  preventing ANSI bombs and such mischief.

- PKZIP 2 includes PKSFANSI (PK Safe ANSI), a (very) small TSR that blocks
  Keyboard reassignment codes with any version of ANSI.  Also offers the
  stipping of color codes which is useful on monochrom systems such as
  laptops.

- New PKZIP Configuration program allows easy setup of the PKZIP.CFG file.