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1 This is the documentation for the keytab-lilo.pl program. It was
2 taken verbatim from the LILO-20 README file; only this header was
5 LILO program code, documentation and auxiliary programs are
6 Copyright 1992-1997 Werner Almesberger.
7 All rights reserved.
9 Redistribution and use in source and binary forms of parts of or the
10 whole original or derived work are permitted provided that the
11 original work is properly attributed to the author. The name of the
12 author may not be used to endorse or promote products derived from
13 this software without specific prior written permission. This work
14 is provided "as is" and without any express or implied warranties.
16 To use a LILO keyboard table with Syslinux, specify the KBDMAP command
17 in syslinux.cfg, for example:
19 kbdmap de.ktl
23 Keyboard translation
26 The PC keyboard emits so-called scan codes, which are basically key
27 numbers. The BIOS then translates those scan codes to the character codes
28 of the characters printed on the key-caps. By default, the BIOS normally
29 assumes that the keyboard has a US layout. Once an operating system is
30 loaded, this operating system can use a different mapping.
32 At boot time, LILO only has access to the basic services provided by the
33 BIOS and therefore receives the character codes for an US keyboard. It
34 provides a simple mechanism to re-map the character codes to what is
35 appropriate for the actual layout.*
37 * The current mechanism isn't perfect, because it sits on top of the
38 scan code to character code translation performed by the BIOS. This
39 means that key combinations that don't produce any useful character on
40 the US keyboard will be ignored by LILO. The advantage of this approach
41 is its simplicity.
44 Compiling keyboard translation tables
45 - - - - - - - - - - - - - - - - - - -
47 LILO obtains layout information from the keyboard translation tables Linux
48 uses for the text console. They are usually stored in
49 /usr/lib/kbd/keytables. LILO comes with a program keytab-lilo.pl that reads
50 those tables and generates a table suitable for use by the map installer.
51 keytab-lilo.pl invokes the program loadkeys to print the tables in a format
52 that is easy to parse.*
54 * On some systems, only root can execute loadkeys. It is then necessary
55 to run keytab-lilo.pl as root too.
57 keytab-lilo.pl is used as follows:
59 keytab-lilo.pl [ -p <old_code>=<new_code> ] ...
60 [<path>]<default_layout>[.<extension>] ]
61 [<path>]<kbd_layout>[.<extension>] ]
63 -p <old_code>=<new_code>
64 Specifies corrections ("patches") to the mapping obtained from the
65 translation table files. E.g. if pressing the upper case "A" should
66 yield an at sign, -p 65=64 would be used. The -p option can be
67 repeated any number of times. The codes can also be given as
68 hexadecimal or as octal numbers if they are prefixed with 0x or 0,
70 <path> The directory in which the file resides. The default path is
72 <extension> Usually the trailing .map, which is automatically added if
73 the file name doesn't contain dots.
74 <default_layout> Is the layout which specifies the translation by the
75 BIOS. If none is specified, us is assumed.
76 <kbd_layout> Is the actual layout of the keyboard.
78 keytab-lilo.pl writes the resulting translation table as a binary string to
79 standard output. Such tables can be stored anywhere with any name, but the
80 suggested naming convention is /boot/<kbd>.ktl ("Keyboard Table for Lilo"),
81 where <kbd> is the name of the keyboard layout.
85 keytab-lilo.pl de >/boot/de.ktl