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VESA Feature connector

Discussion in 'Electronic Design' started by [email protected], Sep 29, 2005.

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  1. Guest

    I measured the output of the vesa feature connector on a vga graphics
    card (pci-diamond). Unfortunly I only found Hsync & Vsync the rest of
    the pins were "silent" in textmode vga 31.5 kHz, 70 Hz. However the hd15
    vga output works flawlessly.

    Does one need to something special to get vga data output on the
    vesa feature connector?

    IDC 40 pinout:
  2. Guest

    You probably have to turn it on in the graphics controller.
  3. Guest

    Seem that makes it's use as a digital console output for bios setup, etc..
    before any os is loaded, to not work.
  4. Guest

    The video BIOS should be turning it on if you want that feature to
    work. It's probably not implemented by anyone and you're the first
    person to bother to check.
  5. mike

    mike Guest

    IDC 40??? Don't know what you mean by that, but it's 26 pins.
    I used this a decade ago with ISA cards. Don't remember having to
    turn anything on.
    But your link does show enable pins for dot clock et al.

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  6. Zak

    Zak Guest

    ISTR that the VESA was digital and thus supported only EGA video (16 color).
    Maybe put the card in EGA mode? ISTR 640 x 350, 16 color?

  7. Guest

    So it might be, but if the computer _boots_ into vga. It's moot ;)
    Althought thanks for the info.

    It will end up with a 3x 25 Msps A/D or similar solution on the hd15 connector
  8. Zak

    Zak Guest

    Well my ISTR really is that - maybe VGA expanded the meaning of the
    'feature connector'.

    In any case, if you need A/D's - there are A/D's made for exactly this
    purpose - to be used in flat panel displays.

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