MCU-less teletype terminal using Alphacom printer | Hackaday.io
Period-correct technology would probably be a VDU terminal or its predecessor, a teletype terminal, which is an electric typewriter that sends serial output from its keyboard and prints serial input onto paper.
Here's where the Alphacom printer comes in. It was compatible and contemporary with the ZX81 and was a better option in many ways than Sinclair's ZX Printer. (The ZX computers had built-in line-printer capabilities.) Importantly there are plenty of the Alphacoms around today, working fine.