Date   : Fri, 11 Aug 2006 20:11:24 +0100
From   : Sprow <info@...>
Subject: Re: Two Ronnies Beeb

In article <DE8C0A1B304241AA87FB3C00C5C4B8D.MAI@...>,
   Ian Wolstenholme <BBCMailingList@...> wrote:
> Just watched an old episode last night of "The Two Ronnies"
> from 1984 with a doctor's surgery

[snip]

> The keyboard was set at an angle on what looked like a wooden
> block but it was clearly a BBC micro keyboard, with the keys coloured
> white.  And there was a "Domesday" effect where BBC text was
> overlaid over the pictures of Ronnie Barker as he said a number of
> options A,B,C etc. which then flashed up on screen.  And you could
> even see the cursor flashing top left before he read out the options!
>
> Is this an early example of Domesday/Genlock on a BBC Model B?

Probably not, the effect is quite easy to achieve with a genlocked beeb (eg.
"Beeblock" unit) and a vision mixer with luma keying. You just key off black
and mix the live video on top,
Sprow.