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                             TOPS-20 PSI
                      Network File Transfer Hack



                            February, 1984





                        Copyright (C) 1983 by
                    Digital Equipment Corporation,
                     Maynard, Massachusetts 01754


THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND  COPIED
ONLY  IN  ACCORDANCE  WITH  THE  TERMS  OF  SUCH  LICENSE AND WITH THE
INCLUSION OF THE ABOVE COPYRIGHT NOTICE.  THIS SOFTWARE OR  ANY  OTHER
COPIES  THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
OTHER PERSON.  NO TITLE TO AND OWNERSHIP OF  THE  SOFTWARE  IS  HEREBY
TRANSFERRED.

THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE  WITHOUT  NOTICE
AND  SHOULD  NOT  BE  CONSTRUED  AS  A COMMITMENT BY DIGITAL EQUIPMENT
CORPORATION.

DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR  RELIABILITY  OF  ITS
SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.

TOPS-20 PSI Network File Transfer Hack                          Page 2
INTRODUCTION                                                 27 Feb 84


1.0  INTRODUCTION

This document describes the procedures for building  and  running  the
programs  PSIRCV and PSISND.  These are unsupported tools that provide
a facility to transfer files in image mode between two TOPS-20 systems
through  a  PPSN.   The files are transferred in image mode, therefore
both binary and ASCII files may be transferred using these programs.

The software includes a pair of cooperating  programs.   The  "master"
program is PSISND which initiates the virtual circuit and transfer the
files.  The "slave" program is PSIRCV which waits for  the  connection
from  PSISND  and  accepts data, file names and contents of files, and
write them to the DSK:  logical device.



2.0  INSTALLATION INFORMATION

2.1  Inventory

The programs are supplied as source files in the PS:<TOOLS> saveset of
the TOPS-20 PSI Version 1.1 distribution tape.  The files are

      o  IDLE.MAC
      o  PSINFT.BNF
      o  PSINFT.CTL
      o  PSINFT.MEM
      o  PSIRCV.CTL
      o  PSIRCV.FOR
      o  PSISND.FOR



2.2  Utilities

You need the following software utilities to build the software

      o  MACRO-20 Assembler
      o  FORTRAN-20 Compiler (version 6.0 or 7.0)
      o  COMGEN (included in the TOPS-20 PSI tape)



2.3  PPSN Dependent Information

If your PPSN is TELENET, you may skip this paragraph.  Otherwise, edit
the FORTRAN source file PSISND.FOR.  Replace all references of TELENET
by the appropriate name of your network, which is known to the  MODULE
X25-ACCESS  data  base  of  your  system's  Network  Management.   For
example, you should replace TELENET with TRANSPAC, if your  system  is
located in France.

Edit the grammar file PSINFT.BNF which contains the  template  of  the
NCP  commands.   Supply  the appropriate values of your DECnet network
configuration for the first three parameters in the file

TOPS-20 PSI Network File Transfer Hack                          Page 3
INSTALLATION INFORMATION                                     27 Feb 84


     <GATEWAY NODE NAME>
     <DECSYSTEM-20 NODE NAME>
     <DECSYSTEM-20 NODE NUMBER>



2.4  Assembling And Compiling

Submit the file PSINFT.CTL to  assemble  and  compile  the  MACRO  and
FORTRAN source files.

     $SUBMIT PSINFT.CTL <RET>



2.5  Network Management Information

Run the COMGEN program to produce  the  command  file  which  will  be
processed  by  NCP to set up the Network Management information in the
TOPS-20 PSI gateway node

     $COMGEN <RET>
     *PSINFT.CMD=PSINFT <RET>
     [Grammar produced 12 products]
     EXIT
     $

Run the OPR program.  Enter  the  NCP  command  subset  and  take  the
command file PSINFT.CMD

     $OPR <RET>
     OPR>ENTER NCP <RET>
     NCP>TAKE PSINFT.CMD <RET>
         .
         responses from NCP
         .
     NCP>EXIT <RET>
     $

Each time the TOPS-20 PSI gateway node is reloaded, you have  to  take
this command file before you can perform file transfer.



3.0  USAGE

3.1  File Transfer To Your System

You need to login at  the  remote  TOPS-20  PSI  system  in  order  to
transfer files from that system to yours.

If the PSIRCV is not running, submit the file PSIRCV.CTL to run it  as
a  batch  job.  If you wish, before submitting the batch control file,
you may edit the definition of the DSK:  logical name  to  direct  the
incoming files to appropriate directories.

TOPS-20 PSI Network File Transfer Hack                          Page 4
USAGE                                                        27 Feb 84


     $SUBMIT PSIRCV.CTL <RET>

Login to the remote host system and run PSISND.



3.2  File Transfer From Your System

You need to find out if the remote TOPS-20 PSI system is  running  the
PSIRCV program to receive the files from your system.

Run PSISND and start the file transfer.  Following is  an  example  of
the session.

     $RUN PSISND <RET>
     DTE address: 311030300170 <RET>       (remote system's DTE address)
     Calling ... Failed, state is 9        (call is cleared by the network)
     Calling ... Running                   (try again ...)

     From file: PSISND.EXE <RET>           (file to send)
     To file:   PSISND.EXE <RET>           (received file name at remote system)

     From file: PSIRCV.EXE <RET>
     To file:   PSIRCV.EXE <RET>

     From file: <RET>                      (terminate file transfer session)
     CPU time 12.34   Elapsed time 32.81
     $