| > No, the puc0 is a multifunction device that has ns16550 controllers
| > embedded in it.  The problem is when you have different types of serial
| > controllers.  For example:
| >
| > com0	at pci dev ? function ?
| > sab0	at pci dev ? function ?
| > zs0	at sbus slot ?
| >
| > Where both of those are mutually exclusive and have the same physical
| > location in the machine.  Since they have different major numbers you
|
| can you explain this?
| two drivers for SAME port?!?!?!?!

What's to explain?  You have different controllers so you need different
drivers.  Not all the world is a PC.

Eduardo