http://mikeos.berlios.de/write-your-own-os.html
http://www.mundorpgmaker.com/forum/index.php?topic=65738.0
http://webpages.charter.net/danrollins/techhelp/0002.HTM
http://ensino.univates.br/~husemann/Eng/Arq_Comp/interrupcoes_pc.pdf
http://www.robelle.com/smugbook/ascii.html 
http://www.supernovah.com/