Date   : Tue, 18 Aug 2009 01:59:42 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Fw: Fwd: ITV Teletext to shut down in January

Rick Murray wrote:
> Rob wrote:
> > At one point (1989) I tried getting the Beeb *itself* to generate
> > teletext encoding...
> > So .. would it work?
> 
> Um... I can't answer that. Did anything at all happen? Even junk in the
> rolling header?
 
I remember a magazine article from the 1980s that discussed
programming the 6845 CRTC to present pixel-lines of the width
expected by teletext decoders, then software would just fill in the
appropriate values into the bit-mapped display for the CRTC to
serialise.
 
See http://mdfs.net/Teletext/ABZTelText/Develop/BroadCast for my
initial attempt from 1989.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
BBC BASIC for the Sinclair Spectrum - http://mdfs.net/Software/Spectrum