Multinational Character Set

The Multinational Character Set (MCS) is a character encoding created by Digital Equipment Corporation for use in the popular VT220 terminal. It was an 8-bit extension of ASCII that added accented characters, currency symbols, and other character glyphs missing from 7-bit ASCII. It is only one of the code pages implemented for the VT220 National Replacement Character Set.[1][2]

Such "extended ASCII" sets were common (the National Replacement Character Set provided sets for more than a dozen European languages), but MCS has the distinction of being the ancestor of ISO 8859-1.[3]

The code chart of MCS with ISO 8859-1 and the first 256 code points of Unicode have many more similarities than differences. In addition to unused code points, differences from ISO 8859-1 are:

MCS code point Unicode mapping Character
A8 U+00A4 ¤
D7 U+0152 Œ
DD U+0178 Ÿ
F7 U+0153 œ
FD U+00FF ÿ

Codepage layout

In the following table, code points that differ from ISO/IEC 8859-1 are colored yellow.

DEC Multinational Character Set
_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _A _B _C _D _E _F
 
0_
 
NUL
0000
0
SOH
0001
1
STX
0002
2
ETX
0003
3
EOT
0004
4
ENQ
0005
5
ACK
0006
6
BEL
0007
7
BS
0008
8
HT
0009
9
LF
000A
10
VT
000B
11
FF
000C
12
CR
000D
13
SO
000E
14
SI
000F
15
 
1_
 
DLE
0010
16
DC1
0011
17
DC2
0012
18
DC3
0013
19
DC4
0014
20
NAK
0015
21
SYN
0016
22
ETB
0017
23
CAN
0018
24
EM
0019
25
SUB
001A
26
ESC
001B
27
FS
001C
28
GS
001D
29
RS
001E
30
US
001F
31
 
2_
 
SP
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
DEL
007F
127
 
8_
 
IND
0084
132
NEL
0085
133
SSA
0086
134
ESA
0087
135
HTS
0088
136
HTJ
0089
137
VTS
008A
138
PLD
008B
139
PLU
008C
140
RI
008D
141
SS2
008E
142
SS3
008F
143
 
9_
 
DCS
0090
144
PU1
0091
145
PU2
0092
146
STS
0093
147
CCH
0094
148
MW
0095
149
SPA
0096
150
EPA
0097
151
CSI
009B
155
ST
009C
156
OSC
009D
157
PM
009E
158
APC
009F
159
 
A_
 
¡
00A1
161
¢
00A2
162
£
00A3
163
¥
00A5
165
§
00A7
167
¤
00A4
168
©
00A9
169
ª
00AA
170
«
00AB
171
 
B_
 
°
00B0
176
±
00B1
177
²
00B2
178
³
00B3
179
µ
00B5
181

00B6
182
·
00B7
183
¹
00B9
185
º
00BA
186
»
00BB
187
¼
00BC
188
½
00BD
189
¿
00BF
191
 
C_
 
À
00C0
192
Á
00C1
193
Â
00C2
194
Ã
00C3
195
Ä
00C4
196
Å
00C5
197
Æ
00C6
198
Ç
00C7
199
È
00C8
200
É
00C9
201
Ê
00CA
202
Ë
00CB
203
Ì
00CC
204
Í
00CD
205
Î
00CE
206
Ï
00CF
207
 
D_
 
Ñ
00D1
209
Ò
00D2
210
Ó
00D3
211
Ô
00D4
212
Õ
00D5
213
Ö
00D6
214
Œ
0152
215
Ø
00D8
216
Ù
00D9
217
Ú
00DA
218
Û
00DB
219
Ü
00DC
220
Ÿ
0178
221
ß
00DF
223
 
E_
 
à
00E0
224
á
00E1
225
â
00E2
226
ã
00E3
227
ä
00E4
228
å
00E5
229
æ
00E6
230
ç
00E7
231
è
00E8
232
é
00E9
233
ê
00EA
234
ë
00EB
235
ì
00EC
236
í
00ED
237
î
00EE
238
ï
00EF
239
 
F_
 
ñ
00F1
241
ò
00F2
242
ó
00F3
243
ô
00F4
244
õ
00F5
245
ö
00F6
246
œ
0153
247
ø
00F8
248
ù
00F9
249
ú
00FA
250
û
00FB
251
ü
00FC
252
ÿ
00FF
253
_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _A _B _C _D _E _F

References

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