The Linux Serial HOWTO is available from mirrors of sunsite
around the world. If you don't know where your nearest mirror is,
start at http://sunsite.unc.edu/mdw/linux.html
Fuller details of the Xconfig and XF86Config files are found
on the relevant man pages, and in the documentation about
installing X windows such as the Xfree86 HOWTO. Also, see the
XFree86 FAQ at a mirror of http://www.XFree86.org/.