On Wed, Jan 5, 2022 at 11:23 AM Will Senn <will.senn@gmail.com> wrote:

> On 1/5/22 11:34 AM, Phil Budne wrote:
>
> Will Senn wrote:
>
> so then I tryed vt50 and vt52 modes...
>
> xterm should have VT52 emulation, at least the man page on my system says:
>
>        o   VT52 emulation is complete.
>
> But looking at CTRL+{LEFT,MIDDLE,RIGHT}_CLICK menus didn't show a toggle.
>
> The VT100 sequence to enter VT52 mode seems to be <ESC>[?2l
> you should be able to send it with echo.
>
> Then <ESC>H<ESC>J should clear the screen.
>
> NOTE! The ANSI command prefix <ESC>[ will put a real VT52 into "hold
> screen" mode where you need to press some (scroll?) button to allow
> new lines to be added at the bottom of the screen.  Ask me how I know!
>
> phil
>
> Well, is there no end to fascination... That 'worked' in that I was able
> to do this in n xterm on my mac:
>
> printf "\033[?2l"
>
>
> which changed the size of the xterm window to 80 chars wide... then:
>
> printf "\033H\033J"
>
>
> which cleared the screen as you said it would.
>
> But, then, I telnet'd into the the v7 instance and set TERM=vt52, etc.
>
> Now vi gives this:
>
> Y7 HJY- ~
>         ~
>         ~
>         ~
>         ~
>         ~
>         ~
>         ~
>         ~
>         ~Y,
>
>
> However, I should note that v7 doesn't seem to process escape sequences,
> either with a pristine instance or my fully configured instance...
>
> echo '\033'
> \033
>
> This is why I suggested using printf direct in C :)

$ ed test
> ?test
> a
> <ESC>J (just echoes the J)
> .
> w
> 3
> q
> $ od -c test
> 0000000 033   J  \n  \0
> 0000003
>
> There's escape problems :(.  I'll see if I can spin up a V7 box and see if
I have any suggestions.

Warner