1 Linux Braille Console
2 =====================
3
4 To get early boot messages on a braille device
5 readers can start), you first need to compile
6 console (see :ref:`Documentation/admin-guide/s
7 for braille device
8 (in :menuselection:`Device Drivers --> Accessi
9
10 Then you need to specify a ``console=brl``, op
11 format is::
12
13 console=brl,serial_options...
14
15 where ``serial_options...`` are the same as de
16 :ref:`Documentation/admin-guide/serial-console
17
18 So for instance you can use ``console=brl,ttyS
19 override the baud rate to 115200, etc.
20
21 By default, the braille device will just show
22 mode). To review previous messages, press the
23 review mode. In review mode, the arrow keys p
24 :kbd:`PAGE-UP`/:kbd:`PAGE-DOWN` keys go at the
25 the :kbd:`HOME` key goes back
26 to the cursor, hence providing very basic scre
27
28 Sound feedback can be obtained by adding the `
29 parameter.
30
31 For simplicity, only one braille console can b
32 ``console=brl,...`` will be discarded. Also n
33 the console selection mechanism described in
34 :ref:`Documentation/admin-guide/serial-console
35
36 For now, only the VisioBraille device is suppo
37
38 Samuel Thibault <samuel.thibault@ens-lyon.org>
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