README for XFree86 on OS/2 : Hardware and Software Requirements . ... XFree86 does not use the video services of the OS/2 operating system. ... XFree86/OS2-3.3.6 may use a local named-pipe connection or a TCP/IP based network connection. ... There are reports that with EMX 0.9 fix 4, you can also use the new 32 bit IBM TCP/IP 4.1 product. The old IBM TCP/IP 2.0, that comes with the IBM PMX product may be used with Warp as well, although it is no longer supported by IBM. ...