Are there any writeups of the pinout or hopefully the protocol? I made a converter once for a Sun keyboard before https://www.pjrc.com/sun-type-s-keyboard-retr

Are there any writeups of the pinout or hopefully the protocol? I made a converter once for a Sun keyboard before https://www.pjrc.com/sun-type-s-keyboard-retrofit/ https://www.pjrc.com/sun-type-s-keyboard-retrofit/ / https://github.com/jareklupinski/sun2usb https://github.com/jareklupinski/sun2usb