Epson has by far the most complete online collection of documentation I've ever seen. It even has manuals <https://files.support.epson.com/pdf/qx10__/qx10__u1.p

Epson has by far the most complete online collection of documentation I've ever seen. It even has manuals <https://files.support.epson.com/pdf/qx10__/qx10__u1.pdf https://files.support.epson.com/pdf/qx10__/qx10__u1.pdf> for the QX-10 <https://en.wikipedia.org/wiki/Epson_QX-10 https://en.wikipedia.org/wiki/Epson_QX-10> (1983), a CP/M machine!