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 xterm window with the VMS "terminal" set to EIGHT_BIT mode. I feel I am now close to my goal of getting xterm set up so that it feels like a real VT terminal. Peter Allan On Sat, 16 May 2020 at 19:20, Peter Allan <petermal...@gmail.com> wrote: > Thanks Paul and Johnny. I did find the "8-bit controls" menu, but I get > the problem whether it is ticked or unticked. I will check the UTF-8 > situation. > > Cheers > > Peter > > > On Sat, 16 May 2020 at 19:12, Paul Koning <paulkon...@comcast.net> wrote: > >> >> >> > On May 16, 2020, at 11:06 AM, Johnny Billquist <b...@softjar.se> wrote: >> > >> > Sounds like your problem is that TPU thinks your terminal understands >> 8-bit control characters, while it actually doesn't. >> >> If VMS is like RSTS, there is an "8 bit characters" setting but no >> separate 8-bit controls setting, and presumably programs assume the former >> implies the latter. After all, it does with DEC's terminals. >> >> > Ctrl+Left click should show a menu entry "8-bit controls", which is the >> corresponding thing on the xterm side. >> > >> > However, to properly answer your question, we'd need to know a lot more >> about your environment. And it's a bit hard to even ask the right questions >> here, because xterm is so flexible that you can accomplish a lot of stuff >> in multiple ways, and you might not even know what you are doing... And VMS >> tries to figure out what your terminal is, and depending on various >> details, xterm will identify in different ways, which is what VMS then base >> its settings on... >> >> As Johnny also pointed out, be sure not to have xterm set for UTF-8. Not >> just because of 8-bit controls, but also because DEC applications are >> unlikely to know about it; they normally assume DEC MCS (a.k.a., DEC Std >> 169). Latin-1 is a good approximation though not identical. >> >> paul >> >> >>
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