VESA Feature connector

[[email protected]]

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:
http://www.hardwarebook.net/connector/av/vesafeature.html

 

[[email protected]]

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

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

 

[[email protected]]

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

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

 

[[email protected]]

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

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.

 

[mike]

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:
http://www.hardwarebook.net/connector/av/vesafeature.html

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.
mike

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[Zak]

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.

ISTR that the VESA was digital and thus supported only EGA video (16 color).

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

Maybe put the card in EGA mode? ISTR 640 x 350, 16 color?


Thomas

 

[[email protected]]

[email protected] wrote:

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?

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
instead.

 

[Zak]

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

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.


Thomas