Date   : Tue, 26 Feb 2002 10:46:39 -0000
From   : "Kris Adcock" <krisa@...>
Subject: Re: Circuits involving a SAA5050?

> -----Original Message-----
> From: owner-bbc-micro@...
> [mailto:owner-bbc-micro@...]On Behalf Of Michael Borcherds
> Sent: 25 February 2002 19:50
> To: bbc-micro@...
> Subject: Re: [BBC-Micro] Circuits involving a SAA5050?
>
>
> > For several years now I've been maintaining a RiscPC system with a
> teletext
> > decoder card in it. The card is being used to produce an
> 80x25 screen of
> > text as a composite video signal. Now, I need to replace
> this card, mostly
> > because the card has a TV tuner in it, and the property
> where the computer
> > is based does not have a TV licence. So, I'm looking to build my own
> > 'serverely simplified' version of the card. Using an
> SAA5050 chip seems to
>
> Why not rig up a serial/parallel link to a BBC B and use its
> composite video
> output?
>
> cheers,
>
> Mike
>
> (well if you will post to a BBC list :))))

My main reason for posting here was that I figured here would reside the
foremost experts on BBC innards. Yes, I'd thought of using an entire Beeb -
it's just that that is quite a lot of hardware which I wouldn't be using.

Looking at the BBC B circuit diagram again ... I still can't see what else
is helping the 5050 produce the text. Anyone know?

Cheers,

Kris.