Stephen Williams wrote:
Yeah, I had pretty much the same problem. In the end I got the following numbers directly from the PAL signal specification:
Horizontal Frequency = 15.625kHz Vertical Frequency = 50Hz Horizontal lines (total) = 625 Horizontal lines (visible) = 576 Horizontal Front Porch = 1.5�s Horizontal Sync Width = 4.7�s Horizontal Back Porch = 5.8�s Horizontal blanking period = 12�s Vertical Front Porch = 0.16ms Vertical Sync Width = 0.16ms Vertical Back Porch = 1.28ms Vertical blanking period = 1.6ms
As you noticed, Nvidia restrict some of the values in their modelines to multiples of 8. Taking that into account this is the closest possible modeline for 720x576 to the PAL spec:
ModeLine "720x576pali" 13.875 720 744 808 888 576 581 586 625 -hsync
-vsync interlace
I don't suppose you have a simliar spec for a progressive PAL image do you? (I have the Key Digital VGA to Component adapter)
I generated one based off a Powerstrip mode to get 1024x576 which gives an awesome picture, but I'm not sure whether it's entirely in spec as the TV's input identifier is flashing in the corner, which apart from being really annoying probably means that the signal is not entirely in spec. (The TV's a Panasonic 36PD30 if it makes any difference)
Thanks. J
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