A multi-tasking operating system for the x86 32-bit PC architecture

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Legal Information

Terms and Conditions

XOS is in the public domain. It may be freely copied and used for whatever purpose you see fit, including commercial uses. Anyone modifying this software may claim ownership of the modifications, but not the complete derived code. It would be appreciated if the authors were told what this software is being used for, but this is not a requirement.

ALL SOFTWARE AND DOCUMENTATION AVAILABLE ON THIS SITE IS PROVIDED BY THE AUTHORS "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 AUTHORS 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.

NONE OF THE CODE ON THIS SITE IS INTENDED FOR USE IN "LIFE-CRITICAL" APPLICATIONS.

DOWNLOADING OR USING ANY INFORMATION FROM THIS SITE CONSTITUTES ACCEPTANCE OF THESE CONDITIONS AS WELL AS ANY ADDITIONAL CONDITIONS IMPOSED BY THE LICENSES FOR EXTERNAL SOFTWARE PACKAGES LISTED BELOW, WHERE APPLICABLE.

IF YOU ARE IN A JURISDICTION THAT DOES NOT ALLOW OR IN ANY WAY LIMITS ANY OF THESE LIMITATIONS OF LIABILITY, YOU ARE NOT AUTHORIZED TO DOWNLOAD OR USE ANY INFORMATION FROM THIS SITE.

Or, to put it in plain English, it's all free, you can (with a few minor restrictions detailed below) do whatever you want with it. It may or may not work as advertised. If you somehow manage to use it to shoot yourself or anyone else in the foot (or anywhere else) we are not responsible! If you don't or can't agree to this, you can't use it.

External Software Packages

There are some software packages provided on this site that were written by other parties and are provided under somewhat more restrictive terms and conditions. Generally these restrictions deal with retaining copyright notices and providing credit, in some way, to the original authors. They may also require that you distribute source code for a package and of any modifications you make to it when you distribute XOS or a work derived from XOS. To the best of our knowledge there are no additional restrictions that should seriously interfere with the free use of any of these packages for personal or commercial use. However, we can not and do not provide legal advice about this. If you plan on distributing XOS as part of a commercial product, you should obtain legal advice regarding the various licenses listed below.

Following is a list of the external packages provided here with links to the various controlling license agreements. Copies of these licenses are also provided in license.txt files in the package's respective directories. These directories are in the xosaux directory tree.

OpenWatcom 1.8 (openwatcom.org) (modified) - Licensed under the Open Watcom Public License. The OpenWatcom C compiler has been ported to run under XOS and is the primary compiler used in developing XOS. A few of the OpenWatcom run time library routines are also used. The source code for the compiler is in \xosaux\owxc\. The executable for the compiler is in \xossys\cmd\. The sources for the library routines used are in \xossrc\libc\.

FreeType2 (freetype.org) (modified) - Written by the FreeType Project, licensed under the FreeType license. FreeType2 is used as the font rendering engine for the XOS graphical user interface XWS (XOS Windowing System). The FreeType2 sources are in \xosaux\freetype2\. The object library generated from these sources is in \xossys\lib\xos\.

DejaVu Fonts (dejavu.org) (not modified) - A set of TT fonts originally written by Bitstream. The modifications made by DejaVu are in the public domain. The original fonts are distributed under the Bitstream and Arev licenses. These fonts are used with XWS. The font files are in \xossys\fnt\.

Leptonica Graphics Library (www.leptonica.com) (modified) This is a library containing function for image manipulation. XOS uses some of its routines for image scaling. Licensed under the Creative Commons Attribution 2.5 License). The sources for the functions used are in \xossrc\libxws\. The object files are in \xossys\lib\xos\libxws03.obj

Indepdent JPEG Group's JPEG Software (www.ijg.org) (modified) - Licensed under the IJP license. This is set of functions for encoding and ecoding JPEG image files. They are used in XWS. The sources are in \xosaux\jpeg6b\. The resulting object library is in \xossys\lib\xos\.

zlib (zlib.net) (modified) zlib is a library of data compression routines written by Mark Adler and Jean-loup Gailly These routines are used in several XOS user programs. They are also used in the mkxosinst MS Windows program. The sources are in \xosaux\zlib-1-2-3\. The object library generated from them is in xossys\lib\xos\. Licensed under the zlib license.



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