On Thu, 31 Oct 2002, emanuel stiebler wrote:
  Cleaning my vt-240, I noticed that there is an
"expansion" connector
 inside, with enough space for a pretty big board. 
 My VT100 has what seems to be an add-in board that has RGB BNCs.  I know
 so little about them that I don't even know whether those are intended to
 be input or output. 
 as it
has VT100 manuals and a couple of VT240 pocket guides.
                        Zane