> > I don't think in I/O maped IO is slower than memory mapped > I/O(correct me if i am wrong). AFAIK, it is. Read http://gsyprf11.external.hp.com/ols2002/www/4Posted_vs_Non_Posted.html - Riba > One constraint with the I/O mapping in x86 machines are that their address > space is only 64KB as they use only 16 address lines. > > Any further inputs are welcome > > gop -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/