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TOPS20.DOC TOPS-20 Release 4.1










COPYRIGHT (C) 1976,1978,1979,1980,1981,1982,1983 BY  DIGITAL
EQUIPMENT   CORPORATION,   MAYNARD,   MASS.    THE  SOFTWARE
DESCRIBED IN THIS DOCUMENT 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  DOCUMENT  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.
                                                      Page 2


SUMMARY
=======

Version  4.1  is  a  maintenance  release  of  the   TOPS-20
operating  system  and its associated utilities.  Its target
audience is any TOPS-20 site running on a KS (2020) or on  a
KL  Model  A (2040/2050).  It is not intended to run on a KL
Model B processor.  The number of specific new  features  in
this  release is less than those in TOPS-20 Version 4.  Many
of the changes in Version 4.1 relate to  minor  enhancements
which fix problems that were discovered in Version 4.

The TOPS-20 documentation has been updated in several places
in order to provide complete information on the new features
in Version 4.1.   The  following  documents  are  especially
important sources of information relating to Version 4.1.


     1.  TOPS-20 Commands Reference Manual (update)

         Provides changes to the TOPS-20 EXEC.

     2.  TOPS-20 User's Guide (update)

         Describes the usage of the  system  from  a  user's
         point  of view.  This update includes miscellaneous
         improvements.

     3.  TOPS-20 LINK Reference Manual (revision)

         Provides information on LINK Version 5 features.

     4.  TOPS-10/20 SPEAR manual (new)

         Provides information on the system error  reporting
         program, SPEAR.
                                                      Page 3


NEW FEATURES IN Version 4.1
=========================

Some specific new features in Version 4.1 are as follows:


     1.  SPEAR support

         SPEAR is an error reporting and analysis  mechanism
         which  is being released and supported with Version
         4.1.  SPEAR replaces the program SYSERR  which  was
         included with TOPS-20 Version 4.  There have been a
         few changes within TOPS-20  in  order  to  actually
         support  the  functionality  of  SPEAR,  but all of
         these changes are transparent to the  user.   SPEAR
         will  continue  to read the ERROR.SYS file found in
         <SYSTEM>.

         Refer to the SPEAR Manual for complete  information
         on the use of this product.

     2.  Miscellaneous EXEC enhancements

         There are several miscellaneous commands that  have
         been  added  to  the  EXEC  in Version 4.1.  Please
         refer to  the  TOPS-20  Commands  Reference  Manual
         update for full details of these new commands.

     3.  Autobaud Detect

         TOPS-2020 systems now have the ability to determine
         baud  rates  of  remote terminals, up to a speed of
         1200 baud




PACKAGING FOR TOPS-20 VERSION 4.1
===============================


There are some minor differences in the packaging of Version
4.1   in   comparison   to   the  packaging  of  Version  4.
Specifically, the  following  packaging  changes  have  been
made:


     1.  The Version 4.1  Installation  tape  for  the  2020
         contains  all supported TOPS-20 monitors.  That is,
         there is no separate ARPA monitor tape as there was
         in  Version  4.  Any non-ARPA 2020 sites can delete
         any   ARPA   related   files   contained   on   the
         installation and distribution tapes.  The following
         is a list of the ARPA utilities
                                                      Page 4


                 FTP     FTPSER  NETSRV  NETSTA TN
                 NMAILR  REL1    SNDMSG  TELNET



     2.  The Galaxy included on this  tape  is  Version  4.2
         Galaxy.   This  is a new release of Galaxy which is
         also being packaged with Release  5.1  of  Tops-20.
         See  the  file  GALAXY.BWR  for more information on
         Galaxy.  The following is  a  list  of  the  Galaxy
         components.

                BATCON  CDRIVE  GALGEN  GLXLIB  LPTSPL
                OPR     ORION   PLEASE  QMANGER QUASAR
                SPRINT  SPROUT





OTHER INFORMATION FOR VERSON 4.1
===============================



1.  Updated Utilities

The following utilities have  been  updated.   Most  of  the
updates will be transparent to the user.  However, for some,
such as TV, this may not  be  the  case.   See  the  related
source  file  for  the  edit  history.  The octal edit level
reflects  what  you  would  see  if  you   used   the   Exec
"Information Version" command, the decimal value may be used
when referring to SPRs or Autopatch documentation.
Updated utilities:

                Octal           Decimal
                value            value

        ACTGEN  5(7)            5(7)
        ARMAIL
        CHECKD  4(53)           4(43)
        CHKPNT  5(166)          5(118)
        DLUSER  5(10)           5(8)
        EDIT    5(244)          5(164)
        LINK    5.1(2030)       5(1048)
        MAPPER  5(5)            5(5)
        PA1050  5.1(627)        5.1(407)
        PLEASE  104(112)        104(74)
        PTYCON  5(17)           5(15)
        REAPER  5(204)          5(132)
        RMS     1.1(60)         1.1(48)
        SETSPD  4.1(41)         4.1(33)
        SYSJOB  5(20)           5(16)
        TV      5.1(1001)       5.1(513)
                                                      Page 5


        ULIST   5(10)           5(8)
        WATCH   4(14)           4(12)