1280x1024 Reduced Blanking - Vfs from 107Mhz to 99 Mhz to use with VPro V6
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1280x1024 Reduced Blanking - Vfs from 107Mhz to 99 Mhz to use with VPro V6
Hello All
Just finished my vfc for my Samsung 19inch monitor with resolution 1280x1024@58Hz reduced blanking.

The reason is because I have a VPro V6 and I was having the pixel clock issue in 16p color.

I took one of the templates and modified it in order to move from 107Mhz pixel clock to 99.07Mhz a little far away from the pixel clock bug. And Voilla success.

I know there is a a file from someone I think is Karena, long time ago, whoever it reduces the vertical freq to 50Hz where my Samsung only work between 58-75 Hz.

So I reduced the a little here and there. and managed to get 99Mhz. which allowed me to select color depth

Here below the Vfs in case someone wants it:


/*
** 1280x1024_58.vfs - SGI standard format
*/

General
{
    FieldsPerFrame = 1;
    FramesPerSecond = 58;
    TotalLinesPerFrame = 1046;
    TotalPixelsPerLine = 1633;
    ActiveLinesPerFrame = 1024;
    ActivePixelsPerLine = 1280;
    FormatName = "1280x1024_58";
}

Active Line {
    HorizontalFrontPorch = 1 pixels;
    HorizontalSync = 122 pixels;
    HorizontalBackPorch = 230 pixels;
}

Field
{
    Vertical Sync =
    {
        {
            Length = 1.0H;
            Low = 0.0 usec;
        }
        repeat 3
{
            Length = 1.0H;
        }
    }

    Initial Low;
    Vertical Back Porch =
    {
        {
            Length = 1.0H;
            High = HorizontalSync;
        }
        repeat 16
{
            Length = 1.0H;
            Low = 0.0 usec;
            High = HorizontalSync;
        }
    }

    Initial High;

    Active =
    {
repeat 1024
{
    Length = 1.0H;
    Low = 0.0 usec;
    High = HorizontalSync;
}
    }

    Vertical Front Porch =
    {
        repeat 1
{
            Length = 1.0H;
            Low = 0.0 usec;
            High = HorizontalSync;
        }
    }
}

#if 0
    postprocess
    {
dump edge;
    }
#endif


Compile with vfc -c chip=/usr/gfx.../VPro_chip.def,board=/usr...../VPro_Board.def -o 1280x1024_58.vfo /usr/gfx......./1280x1024_58.vfs

Hope it helps

Thanks Regards
Heart
secundis200
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07-02-2022, 02:46 PM


Messages In This Thread
1280x1024 Reduced Blanking - Vfs from 107Mhz to 99 Mhz to use with VPro V6 - by secundis200 - 07-02-2022, 02:46 PM
RE: 1280x1024 Reduced Blanking - Vfs from 107Mhz to 99 Mhz to use with VPro V6 - by Raion - 07-11-2022, 01:52 PM
RE: 1280x1024 Reduced Blanking - Vfs from 107Mhz to 99 Mhz to use with VPro V6 - by vishnu - 07-12-2022, 12:47 AM

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