boot> set tty uplcom0 ... is this feasible?

[Ed Wandasiewicz <wanded_(_at_)_breathemail_(_dot_)_net>]

I have noticed that some hardware do not have a serial port.  
e.g. Thinkpad X40 and mac mini.

However, you can access a serial console through uplcom(8). 

As of OpenBSD 3.5, /etc/ttys

ttyU0   "/usr/libexec/getty std.9600"   vt100 on secure

If you can show boot messages through a serial console, is it feasible
to do so through a USB-serial interface?

i.e.  boot> set tty uplcom0
switching console to uplcom0

Ed.