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IBM PC or MS-DOSkoudpeij 437, oftèn abbrivieiten CP437 or somtaims mislīdiŋli riför tu as OEM font, High ASCII or Ikstenden ASCII[1][2], IBM PC dè orijinol käraktā set sins 1981n.

Käraktās Edit

Folowen-wa teibol rīprisentiŋ CP437 yusiŋ ikwivalènt Unikoud käraktās:

.0 .1 .2 .3 .4 .5 .6 .7 .8 .9 .A .B .C .D .E .F
 
0.
 
NULL
0
0

263A
1

263B
2

2665
3

2666
4

2663
5

2660
6

2022
7

25D8
8

25CB
9

25D9
10

2642
11

2640
12

266A
13

266B
14

263C
15
 
1.
 

25BA
16

25C4
17

2195
18

203C
19

00B6
20
§
00A7
21

25AC
22

21A8
23

2191
24

2193
25

2192
26

2190
27

221F
28

2194
29

25B2
30

25BC
31
 
2.
 

0020
32
!
0021
33
"
0022
34
#
0023
35
$
0024
36
%
0025
37
&
0026
38
'
0027
39
(
0028
40
)
0029
41
*
002A
42
+
002B
43
,
002C
44
-
002D
45
.
002E
46
/
002F
47
 
3.
 
0
0030
48
1
0031
49
2
0032
50
3
0033
51
4
0034
52
5
0035
53
6
0036
54
7
0037
55
8
0038
56
9
0039
57
:
003A
58
;
003B
59
<
003C
60
=
003D
61
>
003E
62
?
003F
63
 
4.
 
@
0040
64
A
0041
65
B
0042
66
C
0043
67
D
0044
68
E
0045
69
F
0046
70
G
0047
71
H
0048
72
I
0049
73
J
004A
74
K
004B
75
L
004C
76
M
004D
77
N
004E
78
O
004F
79
 
5.
 
P
0050
80
Q
0051
81
R
0052
82
S
0053
83
T
0054
84
U
0055
85
V
0056
86
W
0057
87
X
0058
88
Y
0059
89
Z
005A
90
[
005B
91
\
005C
92
]
005D
93
^
005E
94
_
005F
95
 
6.
 
`
0060
96
a
0061
97
b
0062
98
c
0063
99
d
0064
100
e
0065
101
f
0066
102
g
0067
103
h
0068
104
i
0069
105
j
006A
106
k
006B
107
l
006C
108
m
006D
109
n
006E
110
o
006F
111
 
7.
 
p
0070
112
q
0071
113
r
0072
114
s
0073
115
t
0074
116
u
0075
117
v
0076
118
w
0077
119
x
0078
120
y
0079
121
z
007A
122
{
007B
123
|
007C
124
}
007D
125
~
007E
126

2302
127
 
8.
 
Ç
00C7
128
ü
00FC
129
é
00E9
130
â
00E2
131
ä
00E4
132
à
00E0
133
å
00E5
134
ç
00E7
135
ê
00EA
136
ë
00EB
137
è
00E8
138
ï
00EF
139
î
00EE
140
ì
00EC
141
Ä
00C4
142
Å
00C5
143
 
9.
 
É
00C9
144
æ
00E6
145
Æ
00C6
146
ô
00F4
147
ö
00F6
148
ò
00F2
149
û
00FB
150
ù
00F9
151
ÿ
00FF
152
Ö
00D6
153
Ü
00DC
154
¢
00A2
155
£
00A3
156
¥
00A5
157

20A7
158
ƒ
0192
159
 
A.
 
á
00E1
160
í
00ED
161
ó
00F3
162
ú
00FA
163
ñ
00F1
164
Ñ
00D1
165
ª
00AA
166
º
00BA
167
¿
00BF
168

2310
169
¬
00AC
170
½
00BD
171
¼
00BC
172
¡
00A1
173
«
00AB
174
»
00BB
175
 
B.
 

2591
176

2592
177

2593
178

2502
179

2524
180

2561
181

2562
182

2556
183

2555
184

2563
185

2551
186

2557
187

255D
188

255C
189

255B
190

2510
191
 
C.
 

2514
192

2534
193

252C
194

251C
195

2500
196

253C
197

255E
198

255F
199

255A
200

2554
201

2569
202

2566
203

2560
204

2550
205

256C
206

2567
207
 
D.
 

2568
208

2564
209

2565
210

2559
211

2558
212

2552
213

2553
214

256B
215

256A
216

2518
217

250C
218

2588
219

2584
220

258C
221

2590
222

2580
223
 
E.
 
α
03B1
224
ß
00DF
225
Γ
0393
226
π
03C0
227
Σ
03A3
228
σ
03C3
229
µ
00B5
230
τ
03C4
231
Φ
03A6
232
Θ
0398
233
Ω
03A9
234
δ
03B4
235

221E
236
φ
03C6
237
ε
03B5
238

2229
239
 
F.
 

2261
240
±
00B1
241

2265
242

2264
243

2320
244

2321
245
÷
00F7
246

2248
247
°
00B0
248

2219
249
·
00B7
250

221A
251

207F
252
²
00B2
253

25A0
254
 
00A0
255
.0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F

Difference from ASCIIEdit

It is based on ASCII, with the following modifications:

  • The C0 control range (0x00–0x1F hex) is mapped to graphics characters. The codes can assume their original function as controls, but when placed in display RAM and then viewed in text mode, for example in a screen editor like MS-DOS edit, they show as graphics. The graphics are various, such as smiling faces, card suits and musical notes. Code 0x7F, DEL, similarly shows as a graphic (a house).
  • The high-bit range, 0x80–0xFF, is mapped to various symbols: a few European characters (accented Latin vowels, etc) in no particular order and not sufficient for representation of most Western European languages, box drawing characters, mathematical symbols and a few Greek letters commonly used in mathematics and physics.

The repertoire of CP437 was taken from the character set of Wang word-processing machines, according to Bill Gates in an interview with Gates and Paul Allen that in the 2nd of October 1995 edition of Fortune Magazine:

"… we were also fascinated by dedicated word processors from Wang, because we believed that general-purpose machines could do that just as well. That's why, when it came time to design the keyboard for the IBM PC, we put the funny Wang character set into the machine—you know, smiley faces and boxes and triangles and stuff. We were thinking we'd like to do a clone of Wang word-processing software someday."

CP437 is inadequate for internationalisation, as it lacks characters necessary for some languages, such as À (capital A with grave) for French, and has only a few Greek letters. Later MS-DOS character sets, such as CP850 (DOS Latin-1), CP852 (DOS Central-European) and CP737 (DOS Greek), filled the gaps for international use while still being nearly compatible with CP437 by retaining most of the box-drawing characters. All CP437 characters are in Unicode and in Microsoft's WGL4 character set, therefore in most of the fonts on Microsoft Windows, and also in the default VGA font of the Linux kernel, and the ISO 10646 fonts for X11.

Implementors of mapping tables to Unicode should note that CP437 unifies some characters that look almost the same (to the eyes of its implementors, not to the eyes of a typographer): 0xE1 is both the German sharp S (U+00DF, ß) and the Greek lowercase beta (U+03B2, β); 0xE4 is both the n-ary summation sign (U+2211, ∑) and the Greek uppercase sigma (U+03A3, Σ); 0xE6 is both the micro sign (U+00B5, µ) and the Greek lowercase mu (U+03BC, μ); 0xEA is both the ohm sign (U+2126, Ω) and the Greek uppercase omega (U+03A9, Ω) (note that in Unicode as well, the ohm sign is canonically equivalent to the capital omega, and its use is discouraged in favor of capital omega[1]); and 0xEE is both the element-of sign (U+2208, ∈) and the Greek lowercase epsilon (U+03B5, ε).

In DOS and Windows, most characters from the currently active DOS code page can be inserted by holding down the Alt key and entering the character's three-digit decimal code on the numpad. Which DOS code page is currently active can be found out by querying mode.com. This technique is called Windows Alt keycodes.

See also Edit

External links Edit

ReferencesEdit

  1. http://www.cdrummond.qc.ca/cegep/informat/Professeurs/Alain/files/ascii.htm
  2. http://www.pcmag.com/encyclopedia_term/0,2542,t=OEM+font&i=48292,00.asp
Smallwikipedialogo This page uses content from Wikipedia. The original article was at Code page 437. The list of authors can be seen in the page history. As with Babyish Wiki, the text of Wikipedia is available under the GNU Free Documentation License. Nigè peij kontein kontent from Wikipidia. Orijinol-dè artikol-wa à Code page 437, en ano-artikol dè òŧā list ga à edit històry peij. Seim as Babyish Wiki, kontent from Wikipidia ga koncrolen bai GNU Free Documentation License. 本頁面利用了來自維基百科的內容,原文是Code page 437。原文的作者列表可以參考編輯歷史頁面。正如Babyish Wiki一樣,維基百科的內容都依從GNU Free Documentation License條件發布。


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