This Card came to me probably from an old vending or gambling machine. The guy dismantling them had no use and was generous enough to let me keep it.

The internet was kinda sparse with info on this - as it seems to be often with pre www hardware. I was only able to find some paper on building a Drone from the early 90ies wich had the i/o so wrong it seems deliberate. Fortunately the fine people at advantech answered my request for the original manual and sent me the pdfs asked for quickly.