[BRLTTY] printing unicode braille patterns on BrailleBlazer printer

[peter.julien.rayner at gmail.com]

Hmm, I'm getting back to this after only a year's break ...
To recap I have output which mixes ascii and unicode braille patterns
and I need to print these on an ancient printer (a Braille Blazer from
1998) which seems to understand North American Braille Computer Code
(nabcc). It's an 8-dot printer and the notation I'm using has a lot of
dot 8 (i.e high bit set). The translation seems to work, i.e checking
the dot patterns that correspond to the 8-bit characters *after*
translation seem to match the original. I can't, however, print them.
This is over a USB-parallel adapter. Things with dot 8 present don't
seem to be printing correctly. A capital b (dots 1 2 7) will appear
before each such character and frequently the printed character will
be offset by 0x80 from the desired, as iff the high bit was being
ignored. I suspect this is either a printer or Linux device driver
problem  but in case anyone has either a brltty explanation or
workaround I thought I'd try here. Any pointers very much appreciated.
regards
Peter

Dave Mielke writes:
>[quoted lines by peter.julien.rayner at gmail.com on 2023/01/22 at 16:39 +1100]
>
>>Can brltty help with a mapping between the unicode braille patterns and whatever encoding this printer is using? 
>
>This command should do what you're looking for:
>
>   brltty-trtxt -6 -i en-nabcc -o en-nabcc <inputFile >outputFile
>
>The -6 option removes dots 7 and 8. If you'd like to keep those dots then don't use it.
>
>The -i and -o options specify the input and output text tables to use.
>
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