Hi, On Sun, Jun 9, 2013 at 7:54 PM, Satya Prakash Prasad <satyaprakash.prasad@xxxxxxxxx> wrote: > c = inb(index); > printf("%X", c); Not every IO Port is meant for reading. It can be used for writing and control codes. Regards. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies