I've got this Data General D-412+ keyboard that has a 8 pin connector, not 5 pin AT connector and i was wondering if i was able to get it converted to ps/2 or usb while still using it's original circuits (so no tapping around the membrane printed circuit in order to get some arduino replacement).

Still trying to clean this keyboard, so i'm just going to link it here:

https://i.redd.it/mpex9866m7q01.jpg

You can see it's 8 pin connector down there. Is anyone aware of what protocol it uses and if it is possible to convert it?

Thank you in advance