[Info-vax] How to Avoid Old Software, Old Bugs?

[Tony Nicholson]

On Saturday, November 16, 2019 at 10:29:50 AM UTC+11, Michael Moroney wrote:

[snip]

> One thing that bugs me is that on a real VTxxx or DECterm window, the control
> sequence corresponding to/output by "SET TERMINAL/WIDTH=132" or "/WIDTH=80"
> doesn't work.  What actually bugs me is that it DID work long ago but now it
> doesn't and I can't figure out how to do so.  I don't know if I broke something
> or Apple did with some upgrade.

You can get accurate ANSI (VT100, VT220 etc) emulation using the
xterm included with the macOS XQuartz X11 addon to macOS
( https://www.xquartz.org/ ) - indeed this passes most of the
rigorous tests for a "real" terminal that VTTEST checks
( https://invisible-island.net/vttest/ ).  This includes 132
column mode and inverse video, double height, double width etc.

X11 features bundled in Mac OS/X were removed around the Lion (10.7)
timeframe.  XQuartz adds them back (and work in the latest macOS
Catalina (10.15) too!

Tony