Table
26.
Keyboard Extended Functions
SECOND
CODE
FUNCTION
3
NUL
Character
15
16-25
AL
Tn,
W,
E,
R,
T,
Y,
U,
I,
0,
P
30-38
AL
T
A,
S,
0,
F,
G,
H,
J,
K,
L
44-50
ALT
Z,
X,
C,
V,
B,
N,
M
59-68
Fl-Fl0
Function
Keys
Base Case
71
Home
72
t
73
Page
Up
&
Home
Cursor
75
<E-
77
~
79
End
80
-l-
81
Page
Down
&
Home
Cursor
82
INS
83
DEL
84-93
Fl1-F20
(Upper
Case
Fl-Fl0)
94-103
F21-F30
(CTRl F1-Fl0)
104-113
F31-F40
(AlT Fl-Fl0)
114
CTR
L
PRTSC
(Start/Stop
Echo
to
Printer)
Key
55
115
CTRL
~
Reverse
Word
116
CTRl
-?
Advance
Word
117
CTRl
END
Erase
EOl
118
CTR
LPG
ON
Erase
EOS
119
CTRL
HOME
Clear
Screen
and
home
120-131
ALT
1,
2,3,4,5.6.7,8,9,0,
-,
=
(Keys
2-13)
132
CTRl
PG
UP
TOP
25
lines
of
Text
&
Home
Cursor
B.
Shift States
Most shift states are handled within the keyboard routine
transparently to the system or application program.
In
any
case, the current set
of
active shift states are available by
calling
an
entry point in the
ROM
keyboard routine.
The
following keys result in altered shift states:
Shift - Temporarily shifts keys 2-13, 15-27,
30-41,43-53,55,
59-68 to upper case (lower case
if
in
CAPSLOCK
state).
Temporarily reverses
NUMLOCK/NONUMLOCK
state
of
keys
71-73,75,77,
79-83.r--.....
CTRL
- Temporarily shifts keys 3, 7, 12, 14,
16-28,30-38,
43-50,55,59-71,
73, 75, 77, 79,
81
to
CTRL
state.
Used
with
ALT
and
DEL
to cause "system reset" function described in
Section 1.3.
Used
with
SCROLL
LOCK
to cause
"break"
function described in Section 1.3. Used with
NUMLOCK
to
cause
"pause"
function described in Section 1.3.
3-14
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