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Thread: 800x480 : Solution for Intel graphics

  1. #91
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    Quote Originally Posted by bes51659 View Post
    Did you see this?
    http://web.comhem.se/bengt-olof.swing/videohistory.htm
    or this?
    http://web.comhem.se/bengt-olof.swing/buildingthepc.htm

    I have not got the same graphics hw as you on my commell mobo, but at least you will find working timings on.... [media]http://web.comhem.se/mulle2/dtdcalcvalues.jpg[/media] ...on the first link

    Any help?
    In this screenshot, it seems someone used a decimal comma instead of a decimal point. The pixel clock is 43 GHz instead of 43 MHz and the vertical refresh is 75 kHz instead of 75 Hz. The DTD has XXs. Did this ever work, and how? If someone used this, I would expect the worst :-).

    This is what I have:


    I have not tested it on a native 800x480 monitor. My 629 died. It should work though :-).

    By the way, apparently DTD Calculator shows the pixel clock in kHz by a factor 10 too low.

  2. #92
    Maximum Bitrate bes51659's Avatar
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    Vasastaden, Stockholms Län, Sweden, Sweden
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    Thanks! And thanks for pointing that comma issue out! Maybe that was why I did not manage to set the timing myself and had to have the help of Oliver at cartft to create the driver. And when he read the timing he interpreted comma for dot :-)

    As I recall I got the timing input from powerstrip on another mobo.

    Why did you not use a higher frequency pixel clock?

  3. #93
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    Quote Originally Posted by bes51659 View Post
    Why did you not use a higher frequency pixel clock?
    The panel requires 60 Hz fixed. Only the controller is multi-sync. To rate match, it simply writes the frames into a frame buffer at the input rate and reads them out of the frame buffer at 60 Hz. If you feed with more than 60 Hz, there could be additional motion artifacts such as tearing, depending on the update rate of the source. In addition, the higher pixel clock will slightly soften the video in the horizontal direction.

    If your monitor runs at 60 Hz use this but apparently some users had to use 75 Hz to get their Lilliputs to work.

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