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VAXMODEM

XMODEM/YMODEM file transfer program for OpenVMS

Here you will find a program that implements the XMODEM and YMODEM file transfer protocols for OpenVMS (VAX, Alpha, Integrity [and x86_64 soon]).

I originally wrote this in VAX Macro-32 in around May 1982, and this version is the result of converting it to FORTRAN-77 so that it could be ported to run on the then new Alpha architecture in around June 1989. Sadly, I've lost the original Macro-32 sources.

This version is known to build under VAX/VMS V5.5-2 and all versions of OpenVMS after V6.0 with a FORTRAN-77 compiler.

There's a ZIP file containing the sources in vaxmodem.zip that you can download and transfer to an OpenVMS system. To extract the files to an empty directory use the OpenVMS version of UNZIP and specify the "-V" option to preserve the RMS attributes of each file -

$ create /dir [.vaxmodem]
$ set def [.vaxmodem]
$ unzip "-V" [-]vaxmodem.zip
Archive:  VOGON$DUA1:[LOCAL.SOURCES]VAXMODEM.ZIP;1
  inflating: BUILD_VAXMODEM.COM
  inflating: BUILD_VAXMODEM.LOG
  inflating: BUILD_VAXMODEMDBG.COM
  inflating: MAKEFILE
  inflating: VAXMCMDS.CLD
  inflating: VAXMMSGS.MSG
  inflating: VAXMODEM.EXE-AXP
  inflating: VAXMODEM.EXE-VAX
  inflating: VAXMODEM.FOR
  inflating: VAXMODEM.HLP
  inflating: VAXMODEM.HLP-OLD
  inflating: VAXMODEM.INC
  inflating: VAXMODEM.NEWS
  inflating: VAXMODEM.NEWS-OLD
  inflating: VAXMRECV.FOR
  inflating: VAXMSEND.FOR
  inflating: VAXMUTIL.FOR
$

You can build a new executable VAXMODEM.EXE using the BUILD_VAXMODEM DCL command procedure.

The VAXMODEM.HLP file can be added to your OpenVMS Help library using (for example)

$ library/help local_help:local.hlb vaxmodem.hlp/insert

and the compiled binary copied to where you keep your utility programs (for example)

$ copy vaxmodem.exe local_exe:/prot=(w:re)

Install it as a foreign command using (for example)

$ vaxm*odem :== $local_exe:vaxmodem.exe

or have it in the automatic foreign command search-list path pointed to by the DCL$PATH logical name.

For help on how to use VAXMODEM use

$ vaxmodem help

Comments/suggestions/bug reports welcome. Just raise an issue here using GitHub.

Tony

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XMODEM/YMODEM file transfer program for OpenVMS

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