I do not remember where it came from, but I have a 45 page Appendix B
here, called LK201 Keyboard Specification. I used it to hook a LK201 to
my ATARI's long time ago.
If somebody is interested I'll be happy to mail a copy or two around the
world... I could try to scan it but it is loaded with pictures and
tables and w'll end up with a huge bitmap file.

CU
Egbert Jan van den Bussche