Serial console problem with 3.0, am I forgetting something

[Nicholas Janzen <nj@third-net.com>]

The man pages and maillist all point to doing these 2 things, which also
worked on my 2.9 system.

I need to setup a serial console on openbsd 3.0/i386

I have done these things

1) in /etc/ttys i have added (enabled this line)

tty00   "/usr/libexec/getty std.9600"   unknown on secure

2) i have added the line to /etc/boot.conf

set tty com0

but all i get is a terminal, not a console (just a login prompt, no
kernel messages)

Am i missing something, this exact conf worked on a 2.9 system.

Thanks.