[BBC-Micro] Chroma on BBC B
astravan at ntlworld.com
Sun Dec 10 10:51:39 GMT 2006
> A couple of questions about the chroma (on video out) for the BBC B
> 1) Is it possible to "improve"/adjust this easily - when enabled it
> seems to break through quite badly (into the video) on a couple of the
> beebs I have here. I'm guessing this is because either its not modulated
> at the right frequency or the sidebands are not filtered out very well?
> (sorry a little knowledge may prove dangerous here).
> 2) On some machines it drops in and out (on one removing the lid and
> allowing air in improved matters)
> This one particularly annoying as it happened during testing my new game
> just as I was about to beat my girlfriends hi-score, I still managed but
> only just, not easy when one has to remove the screws and lid whilst
> still playing!!!
If someone has an answer to this, I'd love to hear it too. There's a
picture on my blog from when I connected a Beeb to an LCD projector and
played Chuckie Egg with an 8' high picture :-)
However the colour started to flicker after 10 minutes, the projector
didn't like this and the picture started breaking up, eventually going
blank. I didn't bother putting the Beeb back to monochrome composite
video, because I wanted colour!
I had to try a few to get this far, some of them wouldn't do this at all
in colour, and it seems the rest started to fail once they'd warmed up.
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