Maybe it's related to the age of the keyboards. All
the ones I've worked
on originally came with VT220s or Bows/Pros/DECmates. I would guess the
6805 version came out later.
I'm going to get this wrong here :-) but
isn't the LK201 used on the VT220 (and
later terminals) but the LK201 used on the
Rainbow? (I guess that the Pro 380 et al.
use the same keyboard as the Rainbow,
but I don't have any of those).
The LK201 specs are in one of the appandices
that come with the VAXstation 3200 manuals
(possibly in the separate VCB02 tech manual).
The Rainbow tech manual almost certainly
includes the LK250 spec (I have that scanned
too, but it's not available anywhere yet, I think).
If someone is looking to develop a PIC LK2xx
implementation, it would be nice to handle
both variants.
Antonio