Open Device Manager and expand the Keyboard option. Right-click on the Standard PS/2 keyboard (your keyboard name may be different based on your manufacturer). Select Uninstall and follow all on ...
It will allow you to connect either a PS/2 keyboard or a USB keyboard in fallback mode to the Expert using an ATMega328P and a bespoke DIN-13 to DB-13 cable. As it turns out, there’s a wealth of ...