Digital VRC21-KA Monitor?

[moonchilddave]

I just scored what I think could be a sweet monitor for my MAME project (for free)... It's a Digital VRC21-KA monitor.  However, I can't find any specs on it at all, and there are a few connections on the back that I have no idea about.  First thing, it has a "Serial" connection that I have no idea what that is for.  The R, G, B connections are self-explanatory as is the d-sub connector.  But anyone know what COMP HD or VD are for?  Also, the Sync is either 75ohm or 1k?

First thing, would this be a good monitor for MAME?  Also, what would be the best way to utilize it?  VGA or RGB?

Also, if anyone knows where I can find a manual for this thing, I'd be much appreciative!

[qrz]

hd/vd are sync inputs   just like game monitors rgb + h/v sync .  wouldn't be too concerned 'bout the serial port

all i've found is its a multi-sync
h 30-94 khz
v 50 - 152 hz
1280 x1024  72 hz refresh

and refurb units going for > $800   

[Gray_Area]

never mind