uart device numbering

[Norbert Koch]

Hello,

I have an embedded system
which is equipped with uart
hardware controlled by the puc
driver. There are no standard
uarts at 0x3f8/0x2f8.

When I boot FreeBSD 8.2
I see my uarts as devices 0..3.
FreeBSD 9 shows them as 2..5.

The kernel configurations are
more or less identical and disabling
uarts 0 & 1 through /boot/device.hints
seems not to change anything.

Is this behaviour expected/wanted?

Thank you,
Norbert Koch