This file summarizes below the general simh license (indented) which is 
essentially stated at the top of all source code files with the respective 
authors mentioned there.  Pay particular attention to the paragraphs 
(beyond the indented section) which add some specific constraints.

   Copyright (c) 1993-2022, Robert M Supnik, Mark Pizzolato and others

   Permission is hereby granted, free of charge, to any person obtaining a
   copy of this software and associated documentation files (the "Software"),
   to deal in the Software without restriction, including without limitation
   the rights to use, copy, modify, merge, publish, distribute, sublicense,
   and/or sell copies of the Software, and to permit persons to whom the
   Software is furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   ROBERT M SUPNIK, MARK PIZZOLATO OR OTHERS BE LIABLE FOR ANY CLAIM, DAMAGES 
   OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 
   OTHER DEALINGS IN THE SOFTWARE.

   Except as contained in this notice, the name of Robert M Supnik, Mark 
   Pizzolato or anyone else shall not be used in advertising or otherwise to 
   promote the sale, use or other dealings in this Software without prior 
   written authorization from all those parties.


Additionally, the following restrictions on the use of this software apply
and, where applicable, thereby override the "without limitation" clause 
above or in each relevant source code module.

Any use of this codebase that changes the code to influence the behavior of 
the disk access activities provided by sim_disk.c and scp.c is free to do 
that as long as anyone doing this is explicitly not licensed to any subsequent 
changes to any part of the codebase in the master branch of the git repository
(https://github.com/simh/simh) made by Mark Pizzolato after the LICENSE.txt 
was added to the master branch of repository. Changes that qualify for this 
restriction at least include: changing the behavior or default of 
SET AUTOSIZE/NOAUTOSIZE, or any code in scp.c and sim_disk.c or any simulator 
components that use the sim_disk routines.

All changes to the codebase in the master branch of the 
https://github.com/simh/simh repository made by Mark Pizzolato after the 
inclusion of the first version of this LICENSE.txt file in that branch of the
repository will be not be licensed for use by anyone making any of the above 
mentioned sim_disk/autosize related changes.

There are three potential categories of users who may need clarification 
when interpreting the above license wording:

Group 1: Any person who uses completely unmodified code from the master 
         branch of the repository is licensed to use all of "Mark Pizzolato's 
         future changes".
Group 2: Any person using a simulator that has no devices which use sim_disk
         and that doesn't modify scp.c is licensed to use all of "Mark 
         Pizzolato's future changes".
Group 3: Any person who finds it desireable to change the AUTOSIZE 
         functionality of scp.c or any aspect of the sim_disk.c is NOT 
         licensed for any of "Mark Pizzolato's future changes".

Note: Mark Pizzolato's future changes are commits made to the master branch
      of the https://github.com/simh/simh repository authored by Mark 
      Pizzolato after the first version of this LICENSE.txt was added to 
      the master branch of the repository.

For many years, there exist some binary files in the repository which may 
not have formal copyright releases from the original copyright holders and 
therefore those are certainly not granted a license by this LICENSE.txt file.

Upon specific request by the copyright holder any such unlicensed files will 
be removed.