The PC keyboard is used to enter data, switch screens,
and send certain control signals to the computer.
The operating system performs terminal emulation on the PC
screen and keyboard, and, in doing so,
makes use of several particular keys and key combinations.
These keys and key combinations have special names that
are unique to UNIX systems, and may or may not
correspond to the keytop labels on your keyboard.
These keys are described later.
When you press a key, one of the following happens:
an ASCII value is entered
a string is sent to the computer
a function is initiated
the meaning of another key, or keys, is changed.
When a key is pressed (a keystroke),
the keyboard sends a scancode to the computer. This scancode is
interpreted by the keyboard driver.
The interpretation of scancodes may be modified so that keys can function
differently from their default actions.
There are three special occurrences, or keystrokes, which do the following:
switch screens
send signals
change the value of previous character, characters, or string.
Switching screens (Multiscreen)
To get to the next consecutive screen, enter <Ctrl><PrtSc>.
Any active screen may be selected by entering <Alt><Fn>
where <Fn> is one of the function keys.
<F1> refers to the PC display (/dev/tty01).
Handling signals
The keyboard driver recognizes input interrupt characters and
sends the appropriate signal to all processes
that have the terminal as their control terminal.
Examples of interrupt characters are INTR and
QUIT, which terminate a running process by sending
the signals SIGINT and SIGQUIT to the
process group associated with the terminal.
Typically, characters are mapped to signals using
stty(C)
or
ioctl(S)
(see
termio(M)).
Note that some programs disable the special interpretation of
these characters.
Functions such as ERASE, KILL, and XON/XOFF
are not related to signals (see ``Special keys'' below).
Altering values
The actual code sent to the keyboard driver can be changed by
using certain keys in combination.
For example, the <Shift> key changes the ASCII
values of the alphanumeric keys.
Holding down the <Ctrl> key while pressing another key
sends a control code
(<Ctrl>D, <Ctrl>S, <Ctrl>Q, etc.).
Special keys
To help you find the special keys, the following
table shows which keys on a typical console
correspond to UNIX system keys. These are examples and can differ between
shells, applications, and so forth.
UNIX name
Keytop
Action
INTR
<Del>
Stops current action and returns to the shell. This
key is also called the RUB OUT or INTERRUPT key.
BACKSPACE
Deletes the first character to the left of the
cursor. Note that the ``cursor left'' key also has
a left arrow () on its keytop,
but you cannot backspace using that key.
EOF
<Ctrl>D
Signals the end of input from the keyboard; also exits current shell.
ERASE
<Ctrl>H
Deletes the first character to the left of the
cursor.
XON
<Ctrl>Q
Restarts printing after it has been stopped with <Ctrl>S.
XOFF
<Ctrl>S
Suspends printing on the screen (does not stop
the program).
KILL
<Ctrl>U
Deletes all characters on the current line.
QUIT
<Ctrl>\
Quits current command and creates a core file,
if allowed.
(Recommended for debugging only.)
ESCAPE
<Esc>
Special code for some programs. For example,
changes from insert mode to command mode in the
vi(C)
text editor.
RETURN
<Return> or
<Enter>
Terminates a command line and initiates an action from
the shell.
Fn
Fn
Function key n.
<F1>-<F12> are unshifted,
<F13>-<F24> are shifted <F1>-<F12>,
<F25>-<F36> are <Ctrl><F1> through <F12>,
and <F37>-<F48> are <Ctrl><Shift><F1> through <F12>.
Keys <F49>-<F60> are on the number pad
(unshifted):
Keys <F61> through <F96> (see
/usr/lib/keyboard/strings).
The keyboard mapping is performed through a structure
defined in /usr/include/sys/keyboard.h.
Each key can have ten states, generated by holding down the
key itself and (optionally) one or more additional keys.
The first eight are:
Base, where ``Base'' indicates just the key on its own
<Shift>
<Ctrl>
<Alt>
<Ctrl><Shift>
<Alt><Shift>
<Alt><Ctrl>
<Alt><Ctrl><Shift>
There are two additional states indicated by two special bytes.
The first is a ``special state'' byte whose bits indicate whether
the key is ``special'' in one or more of the first eight states.
The second is one of four characters (C, N, B, O) which indicate
how the lock keys affect the particular key.
This is discussed further in the section, ``Scan codes.''
Keyboard mode
Most keyboards are normally in a PC compatibility mode, though
some can be put into a native AT keyboard mode. The
UNIX utility
kbmode(ADM)
can be used to determine if a
keyboard supports AT mode, and can also be used to put the
keyboard into AT mode until the next time the system is
rebooted. A system can also be configured to boot with the
keyboard in AT mode with the
configure(ADM)
utility.
Enhanced keyboards are more programmable in AT mode.
Also, two <Ctrl> keys and an <Alt> key can be recognized in AT mode.
Scan codes
The following table describes the default contents of
/usr/lib/keyboard/keys.
The column headings are:
SCAN CODE
The scan code generated by the keyboard hardware when a key is pressed.
There is no user access to the scan code generated by releasing a key.
BASE
The normal value of a key press.
SHIFT
The value of a key press when the <Shift> key is also being held down.
LOCK
Indicates which lock keys affect that particular key:
C indicates <Capslock>
N indicates <Numlock>
B indicates both
O indicates locking is off
Keys affected by the lock keys C, B, or
N send the shifted value (scan code) of current
state when that lock key is on. When the <Shift> key is
depressed while a lock key is also on, the key reverts
(toggles) to its original state.
The other columns are the values of key presses when
combinations of the <Ctrl>, <Alt> and <Shift> keys are also held down.
The plus (+) indicates that 8-bit keyboard mode is used (also known
as ``meta mode''). In this mode (the default) the high
bit is enabled. To disable the high bit (reverting to 7-bit
mode) or to send ESC
instead of the high bit, you can edit the
/etc/conf/pack.d/cn/space.h file
and change the value of cn_meta_mode (described in
the file comments). You must relink the kernel and reboot
after changing space.h.
All values, except for keywords, are ASCII character values.
The keywords refer to the special function keys.
ALT
SCAN
CNTRL
ALT
ALT
CNTRL
LOCK
CODE
BASE
SHIFT
CNTRL
SHIFT
ALT
SHIFT
CNTRL
SHIFT
STATE
0
nop
nop
nop
nop
nop
nop
nop
nop
O+
1
esc
esc
esc
esc
esc
esc
esc
esc
O+
2
'1'
'!'
nop
nop
'1'
'!'
nop
nop
O+
3
'2'
'
'
nul
nul
'2'
'
'
nul
nul
O+
4
'3'
'#'
nop
nop
'3'
'#'
nop
nop
O+
5
'4'
'$'
nop
nop
'4'
'$'
nop
nop
O+
6
'5'
'%'
nop
nop
'5'
'%'
nop
nop
O+
7
'6'
'^'
rs
rs
'6'
'^'
rs
rs
O+
8
'7'
'&'
nop
nop
'7'
'&'
nop
nop
O+
9
'8'
'*'
nop
nop
'8'
'*'
nop
nop
O+
10
'9'
'('
nop
nop
'9'
'('
nop
nop
O+
11
'0'
')'
nop
nop
'0'
')'
nop
nop
O+
12
'-'
'_'
ns
ns
'-'
'_'
ns
ns
O+
13
'='
'+'
nop
nop
'='
'+'
nop
nop
O+
14
bs
bs
del
del
bs
bs
del
del
O+
15
ht
btab
nop
nop
ht
btab
nop
nop
O+
16
'q'
'Q'
dc1
dc1
'q'
'Q'
dc1
dc1
C+
17
'w'
'W'
etb
etb
'w'
'W'
etb
etb
C+
18
'e'
'E'
enq
enq
'e'
'E'
enq
enq
C+
19
'r'
'R'
dc2
dc2
'r'
'R'
dc2
dc2
C+
20
't'
'T'
dc4
dc4
't'
'T'
dc4
dc4
C+
21
'y'
'Y'
em
em
'y'
'Y'
em
em
C+
22
'u'
'U'
nak
nak
'u'
'U'
nak
nak
C+
23
'i'
'I'
ht
ht
'i'
'I'
ht
ht
C+
24
'o'
'O'
si
si
'o'
'O'
si
si
C+
25
'p'
'P'
dle
dle
'p'
'P'
dle
dle
C+
26
'['
'{'
esc
esc
'['
'{'
esc
esc
O+
27
']'
'}'
gs
gs
']'
'}'
gs
gs
O+
28
cr
cr
nl
nl
cr
cr
nl
nl
O+
29
lctrl
lctrl
lctrl
lctrl
lctrl
lctrl
lctrl
lctrl
O+
30
'a'
'A'
soh
soh
'a'
'A'
soh
soh
C+
31
's'
'S'
dc3
dc3
's'
'S'
dc3
dc3
C+
32
'd'
'D'
eot
eot
'd'
'D'
debug
eot
C+
33
'f'
'F'
ack
ack
'f'
'F'
ack
ack
C+
34
'g'
'G'
bel
bel
'g'
'G'
bel
bel
C+
35
'h'
'H'
bs
bs
'h'
'H'
bs
bs
C+
36
'j'
'J'
nl
nl
'j'
'J'
nl
nl
C+
37
'k'
'K'
vt
vt
'k'
'K'
vt
vt
C+
38
'l'
'L'
np
np
'l'
'L'
np
np
C+
39
';'
':'
nop
nop
';'
':'
nop
nop
O+
40
'\''
'"'
nop
nop
'\''
'"'
nop
nop
O+
41
'`'
'~'
nop
nop
'`'
'~'
nop
nop
O+
42
lshift
lshift
lshift
lshift
lshift
lshift
lshift
lshift
O+
43
'\\'
'|'
fs
fs
'\\'
'|'
fs
fs
O+
44
'z'
'Z'
sub
sub
'z'
'Z'
sub
sub
C+
45
'x'
'X'
can
can
'x'
'X'
can
can
C+
46
'c'
'C'
etx
etx
'c'
'C'
etx
etx
C+
47
'v'
'V'
syn
syn
'v'
'V'
syn
syn
C+
48
'b'
'B'
stx
stx
'b'
'B'
stx
stx
C+
49
'n'
'N'
so
so
'n'
'N'
so
so
C+
50
'm'
'M'
cr
cr
'm'
'M'
cr
cr
C+
51
','
'<'
nop
nop
','
'<'
nop
nop
O+
52
'.'
'>'
nop
nop
'.'
'>'
nop
nop
O+
53
'/'
'?'
nop
nop
'/'
'?'
nop
nop
O+
54
rshift
rshift
rshift
rshift
rshift
rshift
rshift
rshift
O+
55
'*'
'*'
nscr
nscr
'*'
'*'
nscr
nscr
O+
56
lalt
lalt
lalt
lalt
lalt
lalt
lalt
lalt
O+
57
' '
' '
' '
' '
' '
' '
' '
' '
O+
58
clock
clock
clock
clock
clock
clock
clock
clock
O+
59
fkey1
fkey13
fkey25
fkey37
scr1
scr11
scr1
scr11
O+
60
fkey2
fkey14
fkey26
fkey38
scr2
scr12
scr2
scr12
O+
61
fkey3
fkey15
fkey27
fkey39
scr3
scr13
scr3
scr13
O+
62
fkey4
fkey16
fkey28
fkey40
scr4
scr14
scr4
scr14
O+
63
fkey5
fkey17
fkey29
fkey41
scr5
scr15
scr5
scr15
O+
64
fkey6
fkey18
fkey30
fkey42
scr6
scr16
scr6
scr16
O+
65
fkey7
fkey19
fkey31
fkey43
scr7
scr7
scr7
scr7
O+
66
fkey8
fkey20
fkey32
fkey44
scr8
scr8
scr8
scr8
O+
67
fkey9
fkey21
fkey33
fkey45
scr9
scr9
scr9
scr9
O+
68
fkey10
fkey22
fkey34
fkey46
scr10
scr10
scr10
scr10
O+
69
nlock
nlock
dc3
dc3
nlock
nlock
dc3
dc3
O+
70
slock
slock
del
del
slock
slock
del
del
O+
71
fkey49
'7'
'7'
'7'
'7'
'7'
'7'
'7'
N+
72
fkey50
'8'
'8'
'8'
'8'
'8'
'8'
'8'
N+
73
fkey51
'9'
'9'
'9'
'9'
'9'
'9'
'9'
N+
74
fkey52
'-'
fkey92
fkey92
fkey95
fkey95
fkey95
fkey95
N+
75
fkey53
'4'
'4'
'4'
'4'
'4'
'4'
'4'
N+
76
fkey54
'5'
fkey91
fkey91
fkey94
fkey94
fkey94
fkey94
N+
77
fkey55
'6'
'6'
'6'
'6'
'6'
'6'
'6'
N+
78
fkey56
'+'
fkey93
fkey93
fkey96
fkey96
fkey96
fkey96
N+
79
fkey57
'1'
'1'
'1'
'1'
'1'
'1'
'1'
N+
80
fkey58
'2'
'2'
'2'
'2'
'2'
'2'
'2'
N+
81
fkey59
'3'
'3'
'3'
'3'
'3'
'3'
'3'
N+
82
fkey60
'0'
'0'
'0'
'0'
'0'
'0'
'0'
N+
83
del
'.'
del
del
del
del
del
del
N+
84
ns
ns
ns
ns
ns
ns
ns
ns
O+
85
nop
nop
nop
nop
nop
nop
nop
nop
O+
86
nop
nop
nop
nop
nop
nop
nop
nop
O+
The following scan codes exist only for keyboards which support,
and are in, native AT mode, rather than PC
compatibility mode.
ALT
SCAN
CNTRL
ALT
ALT
CNTRL
LOCK
CODE
BASE
SHIFT
CNTRL
SHIFT
ALT
SHIFT
CNTRL
SHIFT
STATE
87
fkey11
fkey23
fkey35
fkey47
scr11
scr11
scr11
scr11
O+
88
fkey12
fkey24
fkey36
fkey48
scr12
scr12
scr12
scr12
O+
89
nop
nop
nop
nop
nop
nop
nop
nop
O+
90
nop
nop
nop
nop
nop
nop
nop
nop
O+
91
nop
nop
nop
nop
nop
nop
nop
nop
O+
92
nop
nop
nop
nop
nop
nop
nop
nop
O+
93
nop
nop
nop
nop
nop
nop
nop
nop
O+
94
nop
nop
nop
nop
nop
nop
nop
nop
O+
95
nop
nop
nop
nop
nop
nop
nop
nop
O+
96
fkey50
fkey62
fkey72
fkey50
fkey82
fkey62
fkey72
fkey50
O+
97
fkey53
fkey64
fkey74
fkey53
fkey84
fkey64
fkey74
fkey53
O+
98
fkey58
fkey67
fkey77
fkey58
fkey87
fkey67
fkey77
fkey58
O+
99
fkey55
fkey65
fkey75
fkey55
fkey85
fkey65
fkey75
fkey55
O+
100
fkey49
fkey61
fkey71
fkey49
fkey81
fkey61
fkey71
fkey49
O+
101
fkey51
fkey63
fkey73
fkey51
fkey83
fkey63
fkey73
fkey51
O+
102
fkey57
fkey66
fkey76
fkey57
fkey86
fkey66
fkey76
fkey57
O+
103
fkey59
fkey68
fkey78
fkey59
fkey88
fkey68
fkey78
fkey59
O+
104
fkey60
fkey69
fkey79
fkey60
fkey89
fkey69
fkey79
fkey60
O+
105
del
fkey70
fkey80
del
fkey90
fkey70
fkey80
del
O+
106
fkey54
fkey54
fkey93
fkey54
fkey96
fkey54
fkey54
fkey54
O+
107
nop
nop
nop
nop
nop
nop
nop
nop
O+
108
nop
nop
nop
nop
nop
nop
nop
nop
O+
109
nop
nop
nop
nop
nop
nop
nop
nop
O+
110
nop
nop
nop
nop
nop
nop
nop
nop
O+
111
nop
nop
nop
nop
nop
nop
nop
nop
O+
112
nop
nop
nop
nop
nop
nop
nop
nop
O+
113
nop
nop
nop
nop
nop
nop
nop
nop
O+
114
nop
nop
nop
nop
nop
nop
nop
nop
O+
115
nop
nop
nop
nop
nop
nop
nop
nop
O+
116
nop
nop
nop
nop
nop
nop
nop
nop
O+
117
nop
nop
nop
nop
nop
nop
nop
nop
O+
118
nop
nop
nop
nop
nop
nop
nop
nop
O+
119
nop
nop
nop
nop
nop
nop
nop
nop
O+
120
nop
nop
nop
nop
nop
nop
nop
nop
O+
121
nop
nop
nop
nop
nop
nop
nop
nop
O+
122
nop
nop
nop
nop
nop
nop
nop
nop
O+
123
nop
nop
nop
nop
nop
nop
nop
nop
O+
124
nop
nop
nop
nop
nop
nop
nop
nop
O+
125
nop
nop
nop
nop
nop
nop
nop
nop
O+
126
nop
nop
nop
nop
nop
nop
nop
nop
O+
127
nop
nop
nop
nop
nop
nop
nop
nop
O+
128
rctrl
rctrl
rctrl
rctrl
rctrl
rctrl
rctrl
rctrl
O+
129
ralt
ralt
ralt
ralt
ralt
ralt
ralt
ralt
O+
130
fkey60
fkey69
fkey79
fkey60
fkey89
fkey69
fkey79
fkey60
O+
131
del
fkey70
fkey80
del
fkey90
fkey70
fkey80
del
O+
132
fkey49
fkey61
fkey71
fkey49
fkey81
fkey61
fkey71
fkey49
O+
133
fkey57
fkey66
fkey76
fkey57
fkey86
fkey66
fkey76
fkey57
O+
134
fkey51
sbfs
fkey73
sbhs
fkey83
sbln
fkey73
fkey51
O+
135
fkey59
sffs
fkey78
sfhs
fkey88
sfln
fkey78
fkey59
O+
136
fkey55
fkey65
fkey75
fkey55
fkey85
fkey65
fkey75
fkey55
O+
137
fkey53
fkey64
fkey74
fkey53
fkey84
fkey64
fkey74
fkey53
O+
138
fkey50
fkey62
fkey72
fkey50
fkey82
fkey62
fkey72
fkey50
O+
139
fkey58
fkey67
fkey77
fkey58
fkey87
fkey67
fkey77
fkey58
O+
140
'/'
nop
nop
nop
'/'
nop
nop
nop
O+
141
cr
cr
nl
nl
cr
cr
nl
nl
O+
142
lwin
lwin
lwin
lwin
lwin
lwin
lwin
lwin
O+
143
rwin
rwin
rwin
rwin
rwin
rwin
rwin
rwin
O+
144
menu
menu
menu
menu
menu
menu
menu
menu
O+
145
power
power
power
power
power
power
power
power
O+
146
sleep
sleep
sleep
sleep
sleep
sleep
sleep
sleep
O+
147
wake
wake
wake
wake
wake
wake
wake
wake
O+
The next table lists the ``value'' of each of the special
keywords used in /usr/lib/keyboard/keys (and the
preceding table).
mapkey(M)
places a ``value'' in the ioctl
buffer during key mapping.
The keywords are only used in the scan code file
(/usr/lib/keyboard/keys) for readability.
Name
Value
Meaning
nop
0
No operation -- no action from keypress
lshift
2
Left-hand shift
rshift
3
Right-hand shift
clock
4
<Capslock>
nlock
5
<Numlock>
slock
6
<Scroll lock>
alt
7
<Alt> key
btab
8
Back tab key -- generates fixed sequence (ESC [ Z)
ctrl
9
<Ctrl> key
nscr
10
Switch to the next screen
pscr
126
" previous
scr1
11
Switch to screen #1
...
...
scr16
26
Switch to screen #16
fkey1
27
Function key #1
...
...
fkey96
122
Function key #96
rctl
123*
Right <Ctrl> Key
ralt
124*
Right <Alt> Key
debug
125
Enter kernel debugger (if enabled)
sffs
127
Scroll forward full screen
sfhs
128
Scroll forward half screen
sfln
129
Scroll forward one line
sbfs
130
Scroll backward a screen
sbhs
131
Scroll backward half a screen
sbln
132
Scroll backward one line
lwin
133+
Left windows key
rwin
134+
Right windows key
menu
135+
Windows context menu key
sleep
136+
Powersave key
power
137+
Sleep key
wake
138+
Wakeup key
AT-style 101/102 key keyboard only.
+
Windows keyboards only; these have no function under SCO OpenServer.
This table lists names and decimal values that are
interchangeable in the mapkey file.
Names are used in place of numeric constants to
make it easier to read the scan code table.
Again, only the decimal values are placed in the
ioctl buffer.
These are taken from
ascii(M).
Name
Value
Name
Value
nul
0
dc1
17
soh
1
dc2
18
stx
2
dc3
19
etx
3
dc4
20
eot
4
nak
21
enq
5
syn
22
ack
6
etb
23
bel
7
can
24
bs
8
em
25
ht
9
sub
26
nl
10
esc
27
vt
11
fs
28
np
12
gs
29
cr
13
rs
30
so
14
ns
31
si
15
del
127
dle
16
Keyboard mapping
The PC keyboard is mapped as part of terminal emulation.
This kind of mapping is performed only on the computer keyboard,
not on remote terminals.
Use mapkey to change keyboard mapping.
To change the mapping for individual channels (multiscreens), use
mapchan(M).
Keyboard mapping can also be performed using ioctl.
The syntax is the same as for string key mapping (see the section
``String key mapping'').
For keyboard mapping, cmd is GIO_KEYMAP
to display the current map, and PIO_KEYMAP
puts the prepared buffer into place.
String key mapping
To map string (function) keys, use the
mapstr (see the
mapkey(M)
manual page) utility. mapstr modifies the string mapping
table where function keys are defined.
The string mapping table is an array of 512 bytes
(typedef strmap_t) containing
null-terminated strings that redefine the function keys.
The first null-terminated string is assigned to the first string key,
the second string to the second string key, and so on.
There is no limit to the length of any particular
string as long as the whole table does not exceed 512 bytes, including
nulls. Strings are made null by the introduction of extra
null characters.
The following is a list of default function key values:
Key number
Function key
Function
1
<F1>
ESC[M
2
<F2>
ESC[N
3
<F3>
ESC[O
4
<F4>
ESC[P
5
<F5>
ESC[Q
6
<F6>
ESC[R
7
<F7>
ESC[S
8
<F8>
ESC[T
9
<F9>
ESC[U
10
<F10>
ESC[V
11
<F11>
ESC[W
12
<F12>
ESC[X
13
<Shift><F1>
ESC[Y
14
<Shift><F2>
ESC[Z
15
<Shift><F3>
ESC[a
16
<Shift><F4>
ESC[b
17
<Shift><F5>
ESC[c
18
<Shift><F6>
ESC[d
19
<Shift><F7>
ESC[e
20
<Shift><F8>
ESC[f
21
<Shift><F9>
ESC[g
22
<Shift><F10>
ESC[h
23
<Shift><F11>
ESC[i
24
<Shift><F12>
ESC[j
25
<Ctrl><F1>
ESC[k
26
<Ctrl><F2>
ESC[l
27
<Ctrl><F3>
ESC[m
28
<Ctrl><F4>
ESC[n
29
<Ctrl><F5>
ESC[o
30
<Ctrl><F6>
ESC[p
31
<Ctrl><F7>
ESC[q
32
<Ctrl><F8>
ESC[r
33
<Ctrl><F9>
ESC[s
34
<Ctrl><F10>
ESC[t
35
<Ctrl><F11>
ESC[u
36
<Ctrl><F12>
ESC[v
37
<Ctrl><Shift><F1>
ESC[w
38
<Ctrl><Shift><F2>
ESC[x
39
<Ctrl><Shift><F3>
ESC[y
40
<Ctrl><Shift><F4>
ESC[z
41
<Ctrl><Shift><F5>
ESC[@
42
<Ctrl><Shift><F6>
ESC[[
43
<Ctrl><Shift><F7>
ESC[\
44
<Ctrl><Shift><F8>
ESC[]
45
<Ctrl><Shift><F9>
ESC[[^]
46
<Ctrl><Shift><F10>
ESC[_
47
<Ctrl><Shift><F11>
ESC[`
48
<Ctrl><Shift><F12>
ESC[{
49
<Home>
ESC[H
50
ESC[A
51
<PgUp>
ESC[I
52
<->
-
53
ESC[D
54
<5>
ESC[E
55
ESC[C
56
<+>
+
57
<End>
ESC[F
58
ESC[B
59
<PgDn>
ESC[G
60
<Ins>
ESC[L
You can also map string keys using ioctl.
The syntax is:
#include <sys/keyboard.h>
ioctl(fd,cmd,buf)
int fd, cmd;
char *buf;
...
Use this for string key mapping where cmd is GIO_STRMAP
to display the string mapping table and PIO_STRMAP
to put the new string mapping table in place.
Diagnostics
The following error message may be displayed on the console.
See
messages(M)
for general information about kernel error messages,
including a list of generic device driver errors.
NOTICE: keyboard: AT mode reset to XT
The keyboard has been reset to XT mode by an
ioctl call.
