I wrote a new thing: Connect a Wyse Terminal to a Raspberry Pi - https://famicoman.com/2020/08/03/connect-a-wyse-terminal-to-a-raspberry-pi/
@dokuja It's a WY55. I love the display on DEC terminals but never managed to find one at a good value. Wyse terminals seem to be less expensive overall and perform fairly well. The typeface isn't as pretty though.