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NAME | SYNOPSIS | DESCRIPTION | THEORY | 2.6 KERNELS | OPTIONS | BUGS | SEE ALSO | COLOPHON |
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SETKEYCODES(8) System Manager's Manual SETKEYCODES(8)
setkeycodes - load kernel scancode-to-keycode mapping table
entries
setkeycodes scancode keycode ...
The setkeycodes command reads its arguments two at a time, each
pair of arguments consisting of a scancode (given in hexadecimal)
and a keycode (given in decimal). For each such pair, it tells
the kernel keyboard driver to map the specified scancode to the
specified keycode.
This command is useful only for people with slightly unusual
keyboards, that have a few keys which produce scancodes that the
kernel does not recognize.
The usual PC keyboard produces a series of scancodes for each key
press and key release. (Scancodes are shown by showkey -s, see
showkey(1) ) The kernel parses this stream of scancodes, and
converts it to a stream of keycodes (key press/release events).
(Keycodes are shown by showkey.) Apart from a few scancodes with
special meaning, and apart from the sequence produced by the
Pause key, and apart from shiftstate related scancodes, and apart
from the key up/down bit, the stream of scancodes consists of
unescaped scancodes xx (7 bits) and escaped scancodes e0 xx (8+7
bits). To these scancodes or scancode pairs, a corresponding
keycode can be assigned (in the range 1-127). For example, if
you have a Macro key that produces e0 6f according to showkey(1),
the command
setkeycodes e06f 112
will assign the keycode 112 to it, and then loadkeys(1) can be
used to define the function of this key.
Some older kernels might hardwire a low scancode range to the
equivalent keycodes; setkeycodes will fail when you try to remap
these.
In 2.6 kernels key codes lie in the range 1-255, instead of
1-127. (It might be best to confine oneself to the range 1-239.)
In 2.6 kernels raw mode, or scancode mode, is not very raw at
all. The code returned by showkey -s will change after use of
setkeycodes. A kernel bug. See also showkey(1).
None.
The keycodes of X have nothing to do with those of Linux.
Unusual keys can be made visible under Linux, but not under X.
dumpkeys(1), loadkeys(1), showkey(1), getkeycodes(8)
This page is part of the kbd (Linux keyboard tools) project.
Information about the project can be found at
⟨http://www.kbd-project.org/⟩. If you have a bug report for this
manual page, send it to [email protected]. This page was
obtained from the project's upstream Git repository
⟨https://github.com/legionus/kbd.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-05-20.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
kbd 8 Nov 1994 SETKEYCODES(8)
Pages that refer to this page: showkey(1), getkeycodes(8)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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