I have just managed to answer my own question after much trawling through
man pages and reading the excellent xterm FAQ by Thomas E Dickey at
https://invisible-island.net/xterm/xterm.faq.html
By adding the line
XTerm.vt100.utf8: 0
to my .Xresources file, EDIT/TPU now displays correctly in an
Before MUMPS-11, there was MUMPS-15. It is the only one of the PDP-15's
DEC operating systems that is still missing. TA PDF assembly listing of
XVM/MUMPS-15 (or perhaps only part of it) exists, but it is scribbled
over in places, as though it were a developer's "in progress" listing.
There's
For DSM-11:
http://www.ps8computing.co.uk/dsm-11.html
Best regards,
Sergiusz
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