Chapter 18 Pg 56       DSZ Reference Rev Sep-4-91         Typeset 9-4-91


     19.  CHANGES

     Be sure to save your serial number/password (SNP) card and the putsnp
     program you received from Omen Technology to use with future versions of
     DSZ you may download!

     Current GSZ and DSZ versions are maintained on GEnie (IBM Roundtable),
     EXEC-PC BBS, CompuServe (IBMCOM and CONSULT SIGs) as well as
     TeleGodzilla.

     DSZ is a popular program which has been the object of virus attacks.
     Pirated/hacked versions of DSZ have cost users and DSZ's developer
     thousands of dollars in lost time and other expenses, in addition to
     injuring of Omen Technology's reputation.

     Virus and Trojan code hidden in hacked/pirated copies of DSZ and
     programs claiming to "register DSZ" have caused loss of data.

     Name             Length                           Date        Time   CRC

     dsz.com          52302  Crunched   17%     43899   4 Sep 91   4:32a  c7a1
     dsz.exe          62971  Crunched   19%     51575   4 Sep 91   3:49a  ab47
     PKZIP -vt 32 bit CRC: 23847135   52302  dsz.com
     PKZIP -vt 32 bit CRC: 1E90D1D0   62971  dsz.exe
     gcolors.exe      32672  Crunched   21%     26086   4 Sep 91   0:10a  8f49
     gsz.exe          69728  Crunched   22%     54661   4 Sep 91   4:32a  a95c
     PKZIP -vt 32 bit CRC: B86E1464   69728  gsz.exe
     PKZIP -vt 32 bit CRC: 3A7F8A27   32672  gcolors.exe

     Your copy of DSZ should show this information as provided by

            arc v dsz
     or
           pkxarc -v dsz
           lharc v dsz Setting GSZWINDOW does not affect the GSZ t command.

     ARC, and LHARC use a 16 bit CRC.

     ZIP uses a 32 bit CRC compatible with  the  Professional-YAM  and  ZCOMM
     "crc" command.
           pkzip -vt dsz
     The following Pro-YAM/ZCOMM command gives the 32 bit CRC for DSZ.COM:

     EXAMPLE: >>>c: crc dsz.com


     If your copy shows a different CRC or file length, insist on a
     legitimate copy and report the source of the bogus/pirated copy to Omen
     Technology Inc.  Omen Technology has received reports of serious
     problems caused by unauthorized patches to DSZ, and cannot assume
     liability for the performance of the resultant code.



     Chapter 19 Pg 57       DSZ Reference Rev Sep-4-91         Typeset 9-4-91


     COM7 and COM8 are changed; see the "port" command above.

     A problem in the 1/17/89 and 2/2/89 DSZ versions corrupts files under
     unusual circumstances.  Please delete all instances of the 1/17/89 and
     2-02-89 version.

     There never was a "zmodem d" parameter in DSZ.  Older versions of DSZ
     ignored attempts to set this nonexistient parameter with a message that
     humans ignored.  DSZ now aborts when asked to set a nonexistient
     parameter.  There is a "d" parameter that controls time/date stamping of
     files; Bulletin boards that need to disable time/date stamping of
     received files should simply use "pd0" not preceded by a "z".

     Good news for tired frog stompers!  The ZMODEM rz/sz programs are
     available in native VMS flavors with wild cards, record format support,
     etc..  Pre compiled VAX/VMS files are contained in the RZSZ.TLB
     compressed text library.

     Sep 4 1991: GCOLORS now saves the color scheme in a separate file
     GCOLORS.T.  Many small improvements in the GSZ file xfer display.
     GCOLORS adds a "m" menu choice to remove color from the color scheme.

     A conflict between crash recovery and user specified short packets has
     been corrected.

     DSZ.EXE and GSZ now accept the "c" option to force incoming files to use
     a changed file name when a file with the same name exists.  The
     receiving program must support this new ZMODEM option or file
     disposition will be undefined.

     Aug 7 1991: Serial I/O modifications have solved a Wedge-O-Matic(R)
     problem with one hardware configuration (antique 2400 bps internal
     modem).  Hopefully this will solve similar non-replicatable problems for
     other users.

     A number of display fixes/enhancements to GSZ, including the addition of
     the GSZWINDOW environment variable enabling BBS sysops to protect BBS
     status lines at the bottom of the screen.


     July 29 1991: Corrections to gcolors registration function.

     July 28 1991: Some changes to GSZ and CGOLORS to improve human factors.

     "GCOLORS -q" disables the flashing reminder of which field is being
     modified.  This was added to help users with certain visual impairments.

     A few users have reported hung transfers wither certain hardware and/or
     software configurations.  We have not been able to replicate the
     problem, but have added code that recovers from lost interrupts.