On Tuesday, October 29, 2013 6:27:06 am Nomad Esst wrote: > How this job is done by driver? What should I do in order to change the beginning number of ports numbering? devclasses (devclass_t) assign unit numbers by using a first-free algorithm when a new device is added. sys/kern/subr_bus.c is the place to dig for more details on this. -- John Baldwin