Re: 6569 vs. 8565

From: Gerrit Heitsch <>
Date: Sat, 24 Nov 2012 20:25:22 +0100
Message-ID: <>
On 11/24/2012 07:30 PM, wrote:
> I wrote a few times about preferring 6569 over 8565 due to 8565's more "synthetic" visual performance and especially the vertical stripes and "spike" effect visible on raster tricks. There is however at least two things, which I find noticeably better on 8565 equipped boards. One is the power dissipation, which seems to be palpably lower and the other is lack of chrominance "artefacts" resulting in some edge colour bleeding/ghosting on wide boards. While there is not much to be done (except lowering the supplied voltages) in terms of energy saving, AFAIR the output levels of both chips differ significantly. Maybe there something that could be done to mitigate the unwanted chroma effects?

If you use a 6569R5 on a 250466 board and replace the modulator with a 
just a driver circuit for S-video, you get a very clear picture.

As for lower power, the 6569 is NMOS, there's not much you can do about 
it if you want it to work.


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Received on 2012-11-24 20:00:09

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