[BRLTTY] converting unicode to 8-dot brf

[Dave Mielke]

[quoted lines by peter.julien.rayner at gmail.com on 2025/11/28 at 14:16 +1100]

>That does indeed produce characters which correspond to the correct
>dot patterns in the text_nabcc.dis display table, so far so good ...

Turns out they actually copied their table froj orus. See its comments.

>Yes, in this case an ancient  Braille Blazer. It's ancient enough I
>can't find documentation on its 8-dot display table. 

It's table probably doesn't match ours. Note that ours isn't any kind of official standard. It was invented to meet a requirement way back in the days when we weren't using Unicode characters.

>Also, IOS 26 has
>introduced a new cluster of applications under the Braille Access
>rubric. This includes a nice feature for reading files on a braille
>device with reasonable workflows for getting them there from my Linux
>laptop. Alas it doesn't understand unicode braile so I was curious to
>try 8-dot brf. Failed on both counts.

If you can get it to produce an example file containing all 256 dot patterns then maybe its table can be reverse-engineered. If you can send me such a file and let me know which order the characters are in then I can have a look at it.

>And alas the BB isn't expecting 8-dot brf. Worth a try to avoid buying
>a new embosser for the task.

Sure. Again, though, I must emphasize that there's no actual standard known as 8-dot BRF. Same (somewhat modified) offer. If you can send it all possible byte values and let me know which dot patterns they result in then I can write a table for you.

-- 
I believe the Bible to be the very Word of God: http://Mielke.cc/bible/
Dave Mielke            | 2213 Fox Crescent | WebHome: http://Mielke.cc/
EMail: Dave at Mielke.cc  | Ottawa, Ontario   | Twitter: @Dave_Mielke
Phone: +1 613 726 0014 | Canada  K2A 1H7   |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
http://mielke.cc/xmother.html (Letter from a Feminist ex-Mother)