and once again: Bootup messages

Now let me explain my problem exactly:

I want to build a blackbox; no monitor, no keyboard, just
a serial console. If I use biosboot_com0, I see all the
messages... But if I use biosboot, the first thing I see=20
is the login.=20

What I want:
I want to see the startupscreen, like >> NetBSD ......
						  >> (root@gateway......)
						  >> Memory: .........
and want to have the possibility to enter the bootmenu.
After that, the next thing, I want to see is the login.
Nothing inbetween.
Is that possible??=20
It=B4s like having installed biosboot_com0.sym and then using
consdev com1 in the bootmenu. =3D> I see the startupscreen, then nothing
and then, I get my login due to /etc/ttys.
Isn=B4t there a kernel option, which forces the kernel to output to
another com-port or to a file???

Nic