LICENSE

DOjS:
For DOjS code, written by me, the MIT license below applies.

MuJS
MuJS is released under ISC license.

Allegro:
Allegro 4 is released under the "Giftware license" (https://liballeg.org/license.html).

GRX Fonts:
The GRX fonts are under "MIT and other licenses".
See copying.grx below for details.

The converted fonts from the Linux Font Project are in the public domain.

DZComm is released as gift-ware.

IPX and dosbuffer sub-system:
This code is taken from the game Cylindrix by Hotwarez LLC, Goldtree Enterprises.
It was released under GPLv2.

CWSDPMI.EXE:
CWSDPMI (http://sandmann.dotster.com/cwsdpmi/) DPMI host is licensed under GPL.
The documentation states:
> The files in this binary distribution may be redistributed under the GPL
(with source) or without the source code provided.

3dfx/Glide3:
The code is licensed under "3DFX GLIDE Source Code General Public License".
Source code is available at https://github.com/SuperIlu/glide

The DOjS logo dog was downloaded from https://www.pexels.com/photo/animal-cachorro-doge-pug-1753686/ and kindly provided by Iago Garcia Garcia.

The logo font is "Comic relief" (https://www.fontsquirrel.com/fonts/comic-relief) by Jeff Davis provided under SIL OPEN FONT LICENSE Version 1.1.

All WAV files were downloaded from https://bigsoundbank.com/ and are licensed under WTFPL.
* https://bigsoundbank.com/detail-0283-song-of-rooster.html
* https://bigsoundbank.com/detail-1102-bell-bike-5.html
* https://bigsoundbank.com/detail-1023-explosion-far-away.html

The MIDI files were downloaded from the https://github.com/freedoom/freedoom project and are licensed under FreeDOOM license.

jsboot/p5*.js are derived from https://github.com/processing/p5.js and are licensed under LGPL 2.1.

The p5js examples are licensed under CC BY-NC-SA 4.0: https://creativecommons.org/licenses/by-nc-sa/4.0/.

zlib is released under zlib license.

zip code is licensed by UNLICENSE

The OpenSSL toolkit stays under a double license, i.e. both the conditions of the OpenSSL License and the original SSLeay license apply to the toolkit.

AnimatedGIF is licensed under Apache 2.0 license.

See 3rdparty/MesaFX-3.4-master/docs/COPYRIGHT and 3rdparty/MesaFX-3.4-master/docs/COPYING for Mesa 3.4 license.

stb_image.h is distributed under MIT license

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These GRX fonts converted from next packages:

  LFP Fixed Width X Fonts 0.82
  LFP Variable Width X Fonts 0.83

Official Linux Font Project page is located at
<http://dreamer.nitro.dk/linux/lfp>.

All fonts are in the public domain.

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/*
  This is free and unencumbered software released into the public domain.

  Anyone is free to copy, modify, publish, use, compile, sell, or
  distribute this software, either in source code form or as a compiled
  binary, for any purpose, commercial or non-commercial, and by any
  means.

  In jurisdictions that recognize copyright laws, the author or authors
  of this software dedicate any and all copyright interest in the
  software to the public domain. We make this dedication for the benefit
  of the public at large and to the detriment of our heirs and
  successors. We intend this dedication to be an overt act of
  relinquishment in perpetuity of all present and future rights to this
  software under copyright law.

  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 THE AUTHORS 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.

  For more information, please refer to <http://unlicense.org/>
*/

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EARTH.BMP

World map taken from https://commons.wikimedia.org/wiki/File:Whole_world_-_land_and_oceans.jpg?uselang=de

NASA Earth Observatory (NASA Goddard Space Flight Center)

Copyright information from http://visibleearth.nasa.gov/useterms.php
With the exception of images produced by the SeaWiFS, QuickBird, and IKONOS 
instruments all images on the Visible Earth are governed by NASA's Terms of
Use below. [...] For all non-private uses, NASA's Terms Of Use are as follows:
1. The imagery is free of licensing fees 
2. NASA requires that they be provided a credit as the owners of the imagery [...]
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AllegroPNG

Copyright (c) 2006 Michal Molhanec

This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute
it freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented;
     you must not claim that you wrote the original software.
     If you use this software in a product, an acknowledgment
     in the product documentation would be appreciated but
     is not required.

  2. Altered source versions must be plainly marked as such,
     and must not be misrepresented as being the original software.

  3. This notice may not be removed or altered from any
     source distribution.

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  WATTCP - TCP/IP library routines

  Copyright (c) 1990, 1991, 1992, 1993 Erick Engelke

  Portions Copyright (c) 1993  Quentin Smart
  Portions Copyright (c) 1991  University of Waterloo
  Portions Copyright (c) 1990  National Center for Supercomputer Applications
  Portions Copyright (c) 1990  Clarkson University
  Portions Copyright (c) 1983, 1986, Imagen Corporation

     This software is distributed in the hope that it will be useful,
     but without any warranty; without even the implied warranty of
     merchantability or fitness for a particular purpose.

  RESTRICTIONS
  ------------
  You may freely use this library to produce programs which you may give
  away or sell in source format, or as compiled executables, or both.

  You may not sell this library or a portion thereof or distribute modified
  versions the library code in either source or OBJect or LIBrary format
  without written permission from the author.  The author still maintains
  copyright privileges and will assert the privileges of ownership for
  purposes of royalties such distributions.

  Portions of this code were written or enhanced by others and offerred
  to me for distribution in WATTCP under my copyright.  To my knowledge,
  all copyrights exercised are listed at the top of this file.  If this
  is incorrect, please contact me so I can rectify the situation.

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MIT License

Copyright (c) 2019-2021 Andre Seidelt <superilu@yahoo.com>

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 THE
AUTHORS OR COPYRIGHT HOLDERS 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.

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ISC License

Copyright (c) 2013, 2017, Artifex Software

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.

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Allegro 4 (the giftware license)
Allegro is gift-ware. It was created by a number of people working in cooperation, 
and is given to you freely as a gift. You may use, modify, redistribute, and 
generally hack it about in any way you like, and you do not have to give us 
anything in return.

However, if you like this product you are encouraged to thank us by making a 
return gift to the Allegro community. This could be by writing an add-on 
package, providing a useful bug report, making an improvement to the library, 
or perhaps just releasing the sources of your program so that other people can 
learn from them. If you redistribute parts of this code or make a game using it, 
it would be nice if you mentioned Allegro somewhere in the credits, but you are 
not required to do this. We trust you not to abuse our generosity.

By Shawn Hargreaves, 18 October 1998.

DISCLAIMER: 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, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL 
THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES 
OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 
OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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   Dzcomm is gift-ware. It was created by a number of people working in 
   cooperation, and is given to you freely as a gift. You may use, modify, 
   redistribute, and generally hack it about in any way you like, and you do 
   not have to give us anything in return. However, if you like this product 
   you are encouraged to thank us by making a return gift to the dzcomm 
   community. This could be by writing an add-on package, providing a useful 
   bug report, making an improvement to the library, or perhaps just 
   releasing the sources of your program so that other people can learn from 
   them. If you redistribute parts of this code or make something using it,
   it would be nice if you mentioned dzcomm somewhere in the credits, but you 
   are not required to do this. We trust you not to abuse our generosity.

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This is file "copying.grx".

This document describes the terms for distributing the source code of and any
derived work based on the GRX graphics library. Such source code is marked
with the next text:

 ** Copyright (c) [year] [author], [author information]
 **
 ** This file is part of the GRX graphics library.
 **
 ** The GRX graphics library is free software; you can redistribute it
 ** and/or modify it under some conditions; see the "copying.grx" file
 ** for details.

Source code with the above copyright is distributed under the following terms:

 (1) The test programs for the graphics library (code in the 'test'
     sub-directory) is distributed without restrictions. This code
     is free for use in commercial, shareware or freeware applications.

 (2) The GRX graphics library is distributed under the terms of the
     GNU LGPL (Library General Public License) with the following amendments
     and/or exceptions:

     -  Using the DOS versions (DOS only! this exception DOES NOT apply to
	the Linux version) you are permitted to distribute an application
	linked with GRX in binary only, provided that the documentation
	of the program:

	   a)	informs the user that GRX is used in the program, AND

	   b)	provides the user with the necessary information about
		how to obtain GRX. (i.e. ftp site, etc..)

 (3) Fonts (in the 'fonts' sub-directory). Most of the fonts included with
     the GRX library were derived from fonts in the MIT X11R4 distribution.
     They are distributed according to the terms in the file "COPYING.MIT"
     (X license). Exceptions are:
     - The fonts "ter-114b.res", "ter-114n.fna" and "ter-114v.psf" are
       Copyright (C) 2002 Dimitar Zhekov, but are distributed under the
       X license too.
     - The "pc" BIOS font family, which is distributed without restrictions.

A copy of the GNU GPL (in the file "COPYING") and the GNU LGPL (in
the file "COPYING.LIB") is included with this document. If you did
not receive a copy of "COPYING" or "COPYING.LIB", you may obtain one 
from where this document was obtained, or by writing to:

  Free Software Foundation
  675 Mass Ave
  Cambridge, MA 02139
  USA

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Copyright (C) 2001 Hotwarez LLC, Goldtree Enterprises

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation;
version 2 of the License.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

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Copyright (c) 2013, Jeff Davis (info@loudifier.com),
with Reserved Font Name "Comic Relief".

This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL

-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------

PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others.

The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives.

DEFINITIONS
"Font Software" refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation.

"Reserved Font Name" refers to any names specified as such after the copyright statement(s).

"Original Version" refers to the collection of Font Software components as distributed by the Copyright Holder(s).

"Modified Version" refers to any derivative made by adding to, deleting, or substituting -- in part or in whole -- any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment.

"Author" refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software.

PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software, subject to the following conditions:

1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself.

2) Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user.

3) No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users.

4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission.

5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software.

TERMINATION
This license becomes null and void if any of the above conditions are not met.

DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE.

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FreeDOOM license

Copyright © 2001-2018
Contributors to the Freedoom project.  All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

  * Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
  * Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
  * Neither the name of the Freedoom project nor the names of its
    contributors may be used to endorse or promote products derived from
    this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS
IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

For a list of contributors to the Freedoom project, see the file
CREDITS.

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                    GNU LESSER GENERAL PUBLIC LICENSE
                       Version 2.1, February 1999

 Copyright (C) 1991, 1999 Free Software Foundation, Inc.
 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

(This is the first released version of the Lesser GPL.  It also counts
 as the successor of the GNU Library Public License, version 2, hence
 the version number 2.1.)

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