Date   : Wed, 27 Feb 2002 09:55:19 -0000
From   : "Kris Adcock" <krisa@...>
Subject: Re: Circuits involving a SAA5050?

> -----Original Message-----
> From: owner-bbc-micro@...
> [mailto:owner-bbc-micro@...]On Behalf Of Chesterton
> Andrew-BLUW13
> Sent: 26 February 2002 12:21
> 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
>
> Mabe I am just getting confused, but how are you going to
> receive the teletext information to decode if you don't have
> a TV signal demodulator to give you the raw video data ?


I'm not decoding any teletext - I'm sending ASCII data over IIC which the
teletext card is turning into a composite video out.
>
> however, If you don't need the demodulator, then why don't
> you take the circuit for the podule that you are using at the
> moment and hack it to suit your new requirement.
>

As I said before: I need to use the current card elsewhere. I aint
butchering it.

> Changing the interface hardware to suit a different computer
> platform shouldn't be to difficult.
>

I'm not changing platform - I just want to replace /this/ card with one that
does only what I need.