> I have a DECSystem 5000/240 with a KN03-AA 5.1b ROM.
You mean DECstation?

> Which looks like a debug trap to me.(although I'm not
Yep.

> Is there any solution to this problem? An alternative
> way I can get the DECSystem booting or?
Make sure your tftpd/bootpd are set up properly. Set them to be more
verbose and then watch the messages they generate. It's my guess that
that's what's wrong. Your bootp server should be specifying netbsd.ecoff
as a boot image (bf=netbsd.ecoff).

Andy.