Re: Difference in luma-chroma delay of C64/C128 compared to standard S-video

From: silverdr_at_wfmh.org.pl
Date: Mon, 4 Sep 2017 22:54:31 +0200
Message-Id: <DAF93D1D-3814-4C8C-B8A2-5EDFCADA40A2@wfmh.org.pl>
> On 2017-09-04, at 22:02, Gerrit Heitsch <gerrit@laosinh.s.bawue.de> wrote:
> 
>>>> Did anyone try to run a C64 with an independently clocked dot clock?
>> I just did. I put an 8MHz clock directly on 6569R5 VIC's pin 22.
>>>> How did it look like?
>> Heavy colour bleeding and some dot crawl on some colour changes aside - perfect. So I tuned the clock to be 7.88MHz and it seemed fully perfect. Subjectively better than with original clock, although I'd have to connect it to spec analyser and a truly hi-res display to be convinced about that.
> 
> To see dot crawl better, you need to use FBAS/CVBS instead of Y/C.

Yes. Unfortunately my generator doesn't allow "seamless" frequency tuning so I can't be sure if I could fully get rid of them.

-- 
SD! - http://e4aws.silverdr.com/


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Received on 2017-09-04 21:02:51

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