[BRLTTY] Understanding brltty on a linux machine

[Pranav Lal]

Hi Aura,

Thanks for your explanation. I understand what you are saying but the thing
is that I do not even feel the pins move. 

How do I issue brltty commands? When I wrote about moving, I was moving  by
pressing the intermediate up arrow key on my qwerty keyboard. 

Pranav

-----Original Message-----
From: BRLTTY <brltty-bounces at brltty.app> On Behalf Of Aura Kelloniemi
Sent: Thursday, March 20, 2025 2:42 PM
To: brltty at brltty.app
Subject: Re: [BRLTTY] Understanding brltty on a linux machine

Hi!

On 2025-03-20 at 05:21 +0530, "Pranav Lal" <pranav at techesoterica.com> wrote:
 > I have brltty running on my arch linux system. At the bash prompt, if I
do  > Echo test  > I do not see the word test. However, if I scroll up, then
I can read the  > command in the buffer. 

If you run "echo test", you will of cours see the new command prompt on the
braille display, because the prompt is printed after "test" and because the
screen cursor is located at the end of the prompt. I believe this is clear
to you.

Now, if you use the LNUP (line up) command of BRLTTY, you should see the
word "test" or an empty braille window, if the command prompt was longer
than your braille display. LNUP command does not move the braille window to
the left side of the terminal, it just moves one line up keeping the braille
window's left edge where it was. To get to see the beginning of the line you
need to use FWINLT (full window left), LNBEG (line beginning) or a similar
command.

But if scrolling up immediately shows the previous command prompt (and your
echocommand), it could be that you have invoked the PRPROMPT BRLTTY command
(which stands for previous prompt). It scrolls up in the terminal window
until it finds something that looks like a command prompt.

Hopefully this helps.

--
Aura
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