View Full Version : VGA Feature connector

Anonymous Coward
August 12th, 2004, 12:07 AM
I have a question about the VGA/VESA feature connector found on the majority of VGA cards from the late 80s until fairly recently. My understanding is that using a cable it is possible to disable the VGA BIOS on some accellerated videoboards, and pop in a second card that has fast VGA graphics (like a TSENG ET4000). Certain cards (like Matrox) were notoriously slow at displaying standard VGA graphics, but were lightning fast in accellerated modes. Using the feature connector allows you to have the best of both worlds.

Now...to get on with my question. Suppose I have TWO ACCELLERATED display adapters in my machine which are tied together through the feature connector. Assuming that the VGA BIOS is disabled on one of these cards, how is it determined which graphics co-processor is the default? Can I switch between the two coprocessors only by changing the driver? Has anybody ever tried this before? I am tempted to dig my 486 out of the closet to try it myself. The only problem is that all of my display cards are the same brand.

August 12th, 2004, 03:39 AM
I was under the impression that the feature connection was there to get video input to overlay on the main screen (such as from a TV card).

Anonymous Coward
August 12th, 2004, 10:34 AM
TV and genlock cards are two of it's many uses.