Re: Issue using more than 255 color pairs

[Dennis Clarke]

On 7/16/23 13:20, Thomas Dickey wrote:
> On Sun, Jul 16, 2023 at 10:57:54AM -0400, Bill Gray wrote:
> > On 7/16/23 04:35, Thomas Dickey wrote:

.
.
.

> >     "The XSI standard extended conformance level adds new highlights
> > A_HORIZONTAL,  A_LEFT,  A_LOW,  A_RIGHT, A_TOP, A_VERTICAL (and
> > corresponding WA_ macros for each).  As of August 2013, no known terminal
> > provides these highlights."
> >
> >     Does that mean "some terminal(s) once did provide these highlights, but
> > they're all obsolete/missing as of August 2013"?  Or "Somebody might someday
> > provide them,  but they haven't been yet"?
>
> I could change the FAQ to say 2023 (no real difference).  If there's a
> chance that something might change, I mention the month/year when I
> write the comment.
>
> There aren't a lot of places to look, though: the AT&T terminal database
> stopped changing ~1995, while ncurses is still changing.
>
> I've got snapshots of several old-Unix terminal databases, and aside
> from some vendor-specific stuff (more flavors of HP and IBM terminals in
> their respective HPUX and AIX databases), they're much the same.
>   
> >     Is there any difference intended between A_UNDERLINE and A_LOW?
>
> I can only guess :-)
>   
> >     Is A_HORIZONAL basically 'strikeout'?  And what are A_VERTICAL and
> > A_PROTECT supposed to be?
>
> I can only guess :-)

Well, I do have an old amber glass terminal[1] which is essentially a
Dec VT100 or WYSE52 type. Depending on a few settings. I can certainly
say that underline and low intensity does work. As well as strikeout
and blinking characters. Guess I could hook it up to a machine and then
take a picture. To be honest, I am quite curious.


--
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
beard and suspenders installed.

[1] a LINK MC5 unit