Northgate OMNI Key/PLus Keyboard

Hi team,

I have an old fashion (product of 1989) keyboard which is Northgate OMNI Key/PLus Keyboard I got the adapters ps2 and usb, but I still can't run it, I googled some stuff concerning the settings of the 8 dips in the back of the keyboard but couldn't find any helpful stuff. However, if anyone of you guys have this keyboard or knows how to run it please let me know, I really enjoying in typing with this amazing clicky keyboard!

Thanks