COPYING.txt

DXX Retro is released under the D1X-Rebirth License 

Preamble
--------

This License is designed to allow the Descent programming community to
continue to have the Descent source open and available to anyone.

Original Parallax License
-------------------------

THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.

We make no warranties as to the usability or correctness of this code.
-------------------------

The D1X-Rebirth project is the combination of the original Parallax code and the 
modifications and additions made to source code.  While the original code is 
only under the Original Parallax License the D1X-Rebirth project contains original 
code that was not made by Parallax.  This ADDED and/or CHANGED code has the 
following added restrictions:

1) By using this source you are agreeing to these terms.  

2) D1X-Rebirth and derived works may only be modified if ONE of the following is done:
	
	a) The modified version is placed under this license.  The source 
	code used to create the modified version is freely and publicly 
	available under this license.  

	b) The modified version is only used by the developer.

3) D1X-REBIRTH IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.