On Wednesday 27 March 2002 08:07 am, Marcel Weiher wrote:
> >       This is also just a guess, since there is no feedback channel back
> > from
> >       the screen to the computer.
> >       
> > (a) Are you really sure about that?
>
> Yes, certainly with standard BNC or VGA type connectors.  Older Macs
> used to have special coding indicating different monitors, but this is
> usually simulated by an adapter.

Modern "plug and play" monitors have such a back channel, even with VGA 
connectors. This is implemented as a low-speed serial connection.

So when you plug a monitor into your computer, the make, model, size, H and V 
frequency limits, etc. can be determined.

-- 
Ned Konz
currently: Stanwood, WA
email:     ned at bike-nomad.com
homepage:  http://bike-nomad.com