[geeks] Not-quite DVI video?

[Jonathan Patschke]

On Mon, 27 Oct 2025, Mouse via geeks wrote:

> I've got an HP machine which has a video card marked with the HP logo
> and "A4977A Vis EG-PCI".  I'd like to use it - but the video connector
> is odd.  It loooks like DVI at first blush, but it's not; the shell is
> longer than a DVI connector.  It looks as though someone took a DVI
> connector and enlarged the 3x8 grid of pins to 3x10.

That's probably an EVC connector.  HP liked to use them on HP9000 video
cards during the time when video was likely to be on a PCI card.  An HP
Visualize card is *probably* for an HP 9000, but they had a line of
Visualize cards for Windows NT workstations, as well.

A fully-populated EVC connector could carry bidirectional analogue
video, USB, Firewire, and the DDC video side-channel for display
identification.  I've never seen a breakout box to make all that work,
and I don't think our HP9000 graphics cards did anything other than
video output and the DDC channel.  We just used passive connectors that
turned EVC into DE15 for plugging into a common monitor.

-- 
Jonathan Patschke
Austin, TX
USA