/usr/share/doc/brltty/Albatross.README is in brltty 5.0-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | This directory contains the BRLTTY driver for the Albatross
[http://www.tivomatic.fi/html/albatross.html] braille display from Tivomatic
[http://www.tivomatic.fi/]. It has been implemented, and is being maintained,
by Dave Mielke <dave@mielke.cc> and Sami Haahtinen <ressu@ressukka.net>.
The keys on the front of the display are named as depicted below within the
documentation for this driver. See the help file for what they do.
+---+ +---+ +------+ +-----------+ +-----------+ +------+ +---+ +---+
|Top| |Bak| | Up | | | | | | Up | |Bak| |Top|
+---+ +---+ +------+ | | | | +------+ +---+ +---+
| Left | | Right |
+---+ +---+ +------+ | | | | +------+ +---+ +---+
|Bot| |Csr| | Down | | | | | | Down | |Csr| |Bot|
+---+ +---+ +------+ +-----------+ +-----------+ +------+ +---+ +---+
The keys on the top of the display are named as depicted below within the
documentation for this driver. See the help file for what they do.
+---+ +-------+ +---+ +---+ +-------+ +---+
|Hlp| +---+ | Paste | +---+ |Prf| |PrU| +---+ | DifUp | +---+ |PgU|
+---+ |mwp| +-------+ |gwp| +---+ +---+ |iup| +-------+ |idn| +---+
|RF1| |RF2| |RF3| |RF4|
+---+ |ctn| +-------+ |cta| +---+ +---+ |ctl| +-------+ |ctr| +---+
|Lrn| +---+ | Track | +---+ |Stt| |PrD| +---+ | DifDn | +---+ |PgD|
+---+ +-------+ +---+ +---+ +-------+ +---+
|