Good haul of old pc stuph

Chuck Guzis cclist at
Wed Dec 21 19:23:19 CST 2005

On 12/21/2005 at 7:02 PM Jim Leonard wrote:

>As already answered in an earlier post, it depends on the card.  Some EGA
>produce identical signals down both jacks; others produce color on one and
>on the other.

AFAIK, on the original EGA, the answer is "they go to the expansion
connector".  No signals at all; NC, unless there's some sort of EGA
expansion interface installed, such as a genlock board, in which case one
is video in and the other is video out.  On the IBM schematics, they're
just labeled "EXT VIDEO" and "VIDEO".


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