Im really happy found this solution to use my Mega Drive Controller on my old DOS PC.
But i got a problem on some part. First at all i leave the potis as is and jumpered the Dip switches 1 and 4 to on.
So i have second fire button and 5v on pin 5 as the MD use.
Tested some Games like keen4 and harry anything works fine.

Than i try to run Rusty Dos Version and here my down button has no function. All the other button works fine.
To compare the issue with a gravis gamepad down works just fine.
I wonder if this is maybe a calib problem?
What dos software can i use to calib X/Y Axis with this adapter?