Greetings and Questions

Hi all - I'm new to the mailing list and have just started collecting various pieces of retro computer paraphernalia. Had some fun today at the local salvage yard prying open a VAX 8800 looking for interesting bits. Did manage to get the console. Various people have told me that this is most likely a PRO350 or PRO380 (PDP!!!!). Looking inside it's got a RD52 and a set of floppies along with the associated controller cards and the main board. It appears to be in good shape - when I turn on the power, it goes though it's self test and appears to boot Now for the questions: 1. What are my options are far as os'? I'm told that it most likely has a subset of RT11 on the drive. Is this my only option or is it possible to install other PDP11 based os' on this system? 2. The back panel has a serial port and a monitor port (along with what appears to be a printer and AUI network port). There is no direct keyboard input that I can see. I connected a serial terminal to the system and tried various baud rates and parity selections (300-19200, 8-n-1 & 7-e,1) and have been unable to get the system to respond. I'd assume some sort of signon banner at boot but since this was a dedicated console for a vax it's limited to the output only on the other monitor port? Maybe someone can enlighten me.... Thanks muchly for any info, Kirk Davis