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Old 13th Apr 2018, 4:56 pm   #29
peter_scott
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Join Date: May 2003
Location: Edinburgh, UK.
Posts: 3,273
Default Re: Mode line versions

I think with my graphics card the Dot-Clock needs to be greater than 8.000 and the HTotal needs to be less than 3000.

So 107 lines is about the lower limit for me operating at 25 Hz frame rate, and if I halved the frame rate I think the line count would need to double.

Dot-Clock = Frame rate * HTotal * VTotal

Modeline "String description" Dot-Clock HDisp HSyncStart HSyncEnd HTotal VDisp VSyncStart VSyncEnd VTotal

Modeline "1500x100_25 2.7kHz 25.0Hz" 8.020 1500 2828 2938 2999 100 103 105 107 -hsync -vsync

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