I recently acquired a Tektronix 4125 workstation (and/or terminal??) that is designed to be paired with a DEC MicroVax II. It has a “to computer” port that presumably connects to a DEC computer (same connector on many MicroVax systems) but I have no idea what it does. Mainly because the manual for the Tektronix system seems to be lost media. Any info would help, thanks!