(svn r1248) -Add: initial OS/2 support (read docs/ReadMe_OS2.txt) (orudge)

Works fine, beside some minor stuff:
  - Network is not working yet
  - Keyboard is not working
  - No MIDI support
  - 'A few file selector bugs involving drives'

docs/Readme_OS2.txt

@@ -0,0 +1,96 @@
+OpenTTD: OS/2 version  ** CURRENTLY INCOMPLETE **
+=====================
+
+OpenTTD has been ported to work on OS/2 4.x or later (including eComStation). At the moment, it does not work properly, but it
+can compile and work to an extent.
+
+Compiler
+--------
+
+Open Watcom 1.3 was used to build OpenTTD (earlier versions will NOT work). See http://www.openwatcom.org/ to download it.
+It may also be possible to build OpenTTD under OS/2: I attempted this before using Open Watcom, but found the tools available
+for OS/2 at the time to be a bit more tricky to get working.
+
+Due to complexities in my set-up, I actually used the Win32 version of Open Watcom to initially compile OpenTTD for OS/2. There
+should be no reason of course why the OS/2 version cannot be used.
+
+Libraries Required
+------------------
+
+The following libraries are required. To build zlib and libpng, I simply added the required files (watch out for sample
+programs, etc) to an IDE project file and built a library:
+
+- zlib
+  http://www.zlib.org/ - contains a makefile for OS/2, but is out of date and uses EMX
+
+- libpng
+  http://www.libpng.org/ - contains an EMX/gcc makefile
+
+- SDL for OS/2
+  I used ftp://ftp.netlabs.org/pub/sdl/SDL-1.2.7-src-20040908a.zip - take SDL.dll and SDL.lib from the src/ directory.
+
+Note that to use the compiled program, you also need FSLib.dll (from src/ in the SDL zip) and a version of the Scitech
+Display Drivers or its later incarnation (see www.scitech.com).
+
+Compiling
+---------
+
+To compile, open the os/os2/openttd.wpj file in the IDE and build the openttd.exe target.
+
+TODO: compilation of language files properly
+
+
+** THESE DOCS ARE INCOMPLETE FOR THE MOMENT, WILL BE COMPLETED SOON **
+
+If you have any questions, please contact me (owen@owenrudge.net) and I'll try to help you out
+
+- Owen Rudge, 18th December 2004
+
+OpenTTD: OS/2 version  ** CURRENTLY INCOMPLETE **
+=====================
+
+OpenTTD has been ported to work on OS/2 4.x or later (including eComStation). At the moment, it does not work properly, but it
+can compile and work to an extent.
+
+Compiler
+--------
+
+Open Watcom 1.3 was used to build OpenTTD (earlier versions will NOT work). See http://www.openwatcom.org/ to download it.
+It may also be possible to build OpenTTD under OS/2: I attempted this before using Open Watcom, but found the tools available
+for OS/2 at the time to be a bit more tricky to get working.
+
+Due to complexities in my set-up, I actually used the Win32 version of Open Watcom to initially compile OpenTTD for OS/2. There
+should be no reason of course why the OS/2 version cannot be used.
+
+Libraries Required
+------------------
+
+The following libraries are required. To build zlib and libpng, I simply added the required files (watch out for sample
+programs, etc) to an IDE project file and built a library:
+
+- zlib
+  http://www.zlib.org/ - contains a makefile for OS/2, but is out of date and uses EMX
+
+- libpng
+  http://www.libpng.org/ - contains an EMX/gcc makefile
+
+- SDL for OS/2
+  I used ftp://ftp.netlabs.org/pub/sdl/SDL-1.2.7-src-20040908a.zip - take SDL.dll and SDL.lib from the src/ directory.
+
+Note that to use the compiled program, you also need FSLib.dll (from src/ in the SDL zip) and a version of the Scitech
+Display Drivers or its later incarnation (see www.scitech.com).
+
+Compiling
+---------
+
+To compile, open the os/os2/openttd.wpj file in the IDE and build the openttd.exe target.
+
+TODO: compilation of language files properly
+
+
+** THESE DOCS ARE INCOMPLETE FOR THE MOMENT, WILL BE COMPLETED SOON **
+
+If you have any questions, please contact me (owen@owenrudge.net) and I'll try to help you out
+
+- Owen Rudge, 18th December 2004
+