On 11/26/2012 07:43 PM, email@example.com wrote: > All of this I understand but on the same monitor (a TV studio monitor), the 8565 gives virtually _no_ artefacts. Of course the picture from 8565 is not 100% perfect either, and for the good reasons you described above but it does not disturb. Here those effects are actually quite disturbing.. Maybe you have a particularly 'bad' 6569 in that respect. The chip is NMOS, but gets fed the 17.73 MHz (4 x color clock) which it then uses to generate the differently phased 4.43 MHz it uses to generate the color signal. That's a pretty hefty job and probably the reason why the 6569 still needs +12V instead of running completly on +5V like the HMOS-II 8565. Maybe that generator in your 6569 is a bit 'off' with respect to signal quality? Have you tried a different 8701? Also, some people claim, that the old clock generator (74LS629 and MC4044P on the 250407 boards) produces less jitter than the 8701. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2012-11-26 20:00:10
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