The SCO xterm terminfo description is not compatible with the xterm
in the R5 distribution.
To use a Bus/Keyboard or PS2 mouse you should configure the mouse drivers
under SCO as above using 'mkdev mouse'. You may then use the 
OsMouse option
in your XF86Config to specify that XFree86 should use the SCO mouse drivers.
To do this, set the Protocol to "OsMouse" in the 
Pointer section of your
XF86Config file.  You can also use "OsMouse" for your 
serial mouse,
especially if you are having trouble getting your mouse to work using the
XFree86 mouse drivers.
If you do not have the SCO TCP/IP package installed do not panic. XFree86 will work fine without TCP/IP but you will most likely have to do some or all of these things:
is correct while:-rwsr-xr-x 1 root bin 1074060 Jul 24 11:54 XF86_W32
is not.-rwxr-xr-x 1 root bin 1074060 Jul 24 11:54 XF86_W32
                   NSTREAM      128
                   NQUEUE       512
                   NBLK4096     4
                   NBLK2048     32
                   NBLK1024     32
                   NBLK512      32
                   NBLK256      64
                   NBLK128      256
                   NBLK64       256
                   NBLK16       256
                   NBLK4        128
                   NUMSP        128
	
  
You will not normally need to change any of these,  if however you
do have to change some,  configure will confirm that you want to
save the changes before exiting,  and will give you further
instructions on rebuilding the unix kernel.