What resolution is the card outputting? It sure sounds like a Monochrome solution, is it grayscale or B&W? Given the DA-15 connector, I wonder if it will drive any generic Mac compatible monochrome display?

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Don't remember (but was able to drive a 19" LCD display) and even able to have extended desktop.

The LCD had immediately a blue hue, instead of B&W or color, so started looking at the DB15 pinout, and discovered that only blue was wired on pin 9 and 13 for blue ground, no other color.

Moreover, the connector on the board is also DB15, but is not following the usual wiring (in other words cannot plug the display directly for a test)

Will have to do another test, will probably be able to output greyscale...