Currently got this one on my work laptop. Model M terminal board with internal converter. The only layout changes I made versus a normal 102-key are that RCtrl is is a Windows key, and the four keys along the right side of the numpad are =, -, +, and the normal Enter.
How did you convert from rj45 (I'm assuming serial) to USB?
This one was fairly late, like 1998, so it supported "normal" keycodes. I was able to wire up a completely standard "Soarer's" converter and simply use dupont connectors on the internal header. The cord itself is just a random one lying around, with a cable tie for strain relief.
Oh nice! That's always been a deterrent for me, that the key codes are different, and I would need a translator midline, which I didn't want to deal with haha this is MUCH nicer!
So, I don't want to send you the wrong way with the technical details, but whatever this keyboard does, a Soarer's Converter worked fine and it did not require me to have any deep understanding of how the keyboard worked. I understand the Hasu Converter software for the same MCU and wiring can convert damn near anything.
Thank you! Yeah, I wasn't planning on going off of your experience alone, but I've wanted a model M ever since mine was inadvertently discarded with my dad's old tech. I totally understand the desire to clean house of old stuff every so often... but a model M?? I wasn't happy lol