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VESA DDC
(VESA Display Data Channel) A VESA standard communications channel between the display adapter and monitor. The DDC is used to pass Extended Display Identification Data (EDID), which is stored in the monitor and describes its characteristics (vendor name, serial number, frequency range, etc.).
DDC requires an additional wire in the cable. The first level implementation (DDC1) provides a unidirectional channel that lets the monitor inform the host of its capabilities. A second bi-directional level (DDC2) allows the host to adjust the monitor.
For example, the monitor's switch settings could be put into a software control panel.
Here's the connector spec. I'm still looking for more info...
--
Andrew
Lady, people aren't chocolates. Do you know what they are mostly? Bastards. Bastard coated bastards with bastard filling. But I don't find them half as annoying as I find naive, bubble-headed optimists who walk around vomiting sunshine. -- Dr. Perry Cox
It doesn't look like the complete spec is available on the web. You may have to request a copy of the spec from www.vesa.org .
--
Andrew
Lady, people aren't chocolates. Do you know what they are mostly? Bastards. Bastard coated bastards with bastard filling. But I don't find them half as annoying as I find naive, bubble-headed optimists who walk around vomiting sunshine. -- Dr. Perry Cox
Correction, you have to purchase a copy of the spec, for US$350. I guess that's why it's not readily available...
--
Andrew
Lady, people aren't chocolates. Do you know what they are mostly? Bastards. Bastard coated bastards with bastard filling. But I don't find them half as annoying as I find naive, bubble-headed optimists who walk around vomiting sunshine. -- Dr. Perry Cox
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