NOTE ON INSTALLING OPENWATCOM: The OpenWatcom 1.0 compiler (or later) for DOS can be downloaded at www.openwatcom.org: you need at least the following zips from ftp://ftp.openwatcom.org/watcom/zips/ (see ftp://ftp.openwatcom.org/watcom/zips/layout.txt) cm_core_all - Core binaries (All hosts) cm_core_dos - Core binaries (DOS host) cm_core_doswin - Core binaries (DOS & Win hosts) cm_clib_hdr - C runtime library header files cm_clib_a16 - C runtime libraries (16-bit all targets) cm_clib_d16 - C runtime libraries (16-bit DOS) clib_a16 - C runtime libraries (16-bit all targets) clib_d16 - C runtime libraries (16-bit DOS) core_doswin - Core binaries (DOS & Win16 hosts) c_doswin - C compiler (DOS & Win16 hosts) ext_dos4gw - DOS/4GW DOS extender Replace "dos" by "nt" for an NT/Win9x host or "os2" for an OS/2 host. Also note: in OW 1.5 binw\wlink is buggy (fixed by Bart Oldeman in coming OW 1.6), which makes wrong executables, when this linker runs under Windows. So, get updated wlink.exe (for example, from me) or add in PATH both %WATCOM%\binnt and %WATCOM%\binw pathes (not only second path).