Michael <macallan18@earthlink.net> writes:

> Either make a kernel module using bus_space_* or use the good(?) old
> mmap(/dev/mem) way if you don't need interrupts.

Using mmap on /dev/mem will not get you I/O port access on an i386
system. The I/O ports are really their own address space, and nothing
translates memory-space accesses into I/O port accesses. He needs to
use the inb/inw/outb/outw instructions on an i386 for this purpose.

        - Nathan