Hardware Reference
In-Depth Information
Hex
Name Meaning
Hex Name Meaning
0
NUL
Null
10
DLE
Data Link Escape
1
SOH
Start Of Heading
11
DC1
Device Control 1
2
STX
Start Of TeXt
12
DC2
Device Control 2
3
ETX
End Of TeXt
13
DC3
Device Control 3
4
EOT
End Of Transmission
14
DC4
Device Control 4
5
ENQ
Enquiry
15
NAK
Negative AcKnowledgement
6
ACK
ACKnowledgement
16
SYN
SYNchronous idle
7
BEL
BELl
17
ETB
End of Transmission Block
8
BS
BackSpace
18
CAN
CANcel
9
HT
Horizontal Tab
19
EM
End of Medium
A
LF
Line Feed
1A
SUB
SUBstitute
B
VT
Vertical Tab
1B
ESC
ESCape
C
FF
Form Feed
1C
FS
File Separator
D
CR
Carriage Return
1D
GS
Group Separator
E
SO
Shift Out
1E
RS
Record Separator
F
SI
Shift In
1F
US
Unit Separator
Hex
Char
Hex Char Hex Char Hex Char Hex Char Hex Char
20
(Space)
30
0
40
@
50
P
60
'
70
p
21
!
31
1
41
A
51
Q
61
a
71
q
22
"
32
2
42
B
52
R
62
b
72
r
23
#
33
3
43
C
53
S
63
c
73
s
24
$
34
4
44
D
54
T
64
d
74
t
25
%
35
5
45
E
55
U
65
e
75
u
26
&
36
6
46
F
56
V
66
f
76
v
27
'
37
7
47
G
57
W
67
g
77
w
28
(
38
8
48
H
58
X
68
h
78
x
29
)
39
9
49
I
59
Y
69
i
79
y
2A
*
3A
:
4A
J
5A
Z
6A
j
7A
z
2B
+
3B
;
4B
K
5B
[
6B
k
7B
{
2C
,
3C
<
4C
L
5C
\
6C
l
7C
|
2D
-
3D
4D
M
5D
]
6D
m
7D
}
=
2E
.
3E
>
4E
N
5E
ˆ
6E
n
7E
~
2F
/
3F
?
4F
O
5F
6F
o
7F
DEL
Figure 2-44.
The ASCII character set.
The idea behind Unicode is to assign every character and symbol a unique
16-bit value, called a
code point
. No multibyte characters or escape sequences are
used. Having every symbol be 16 bits makes writing software simpler.
With 16-bit symbols, Unicode has 65,536 code points. Since the world's lan-
guages collectively use about 200,000 symbols, code points are a scarce resource
that must be allocated with great care. To speed the acceptance of Unicode, the
consortium cleverly used Latin-1 as code points 0 to 255, making conversion
