HP 9000 340 help

Hi all,
I've salveaged a fully working HP 9000 340 model with hard disk and floppy drive.

It boots up and I get to the login screen. I don't have any usernames or passwords. Anyone know any hacks for the version of Unix it runs?

Is there anyway I can reset the root password? Via Floppy?

I'm trying to connect via serial too as I don't have a BNC switch to connect it to.

I can't seem to get a proper connection via my mac. I've tried 8N1 7E1 9600 but not go? Any ideas?

Thanks,
Rob