Linux
  Building External Modules
         http://www.mjmwired.net/kernel/Documentation/kbuild/modules.txt

Real Time
         http://retis.sssup.it/~lipari/papers/ANIPLA_scordino_lipari.pdf
         http://www.linux.org/threads/achieving-realtime-linux.8165/


Tiny Core
  kernel :
         http://wiki.tinycorelinux.net/wiki:custom_kernel
         http://www.parkytowers.me.uk/thin/Linux/TinycoreCK.shtml
  remastering :
          http://wiki.tinycorelinux.net/wiki:start#remastering

RTAI
 site :       https://www.rtai.org
 doc :       https://www.rtai.org > tag documentation
 man :       https://www.rtai.org/userfiles/documentation

 install :
      README (you'll find it in RTAI package)
      RTAI_Installation_Guide