On 27-feb-2013 2:35, Diane Bruce wrote:
  The VT100 could not keep up with full speed 9600 baud.
The back of
 the VT100 manual has a table of how many nul chars you need per baud rate. 
Well, I have never owned or used a (real) PDP-series system.    (I was
also born long after their heyday.)
  - MG