Configuring the NCD Terminal Emulator

VT320 Character Coding Conventions

This section introduces VT320 character coding conventions and NCD Terminal Emulator character sets. It also includes code tables for NCD Terminal Emulator character sets.

VT320 character coding, conventions, and standards are described in detail in Digital publications.

Character Sets

The NCD Terminal Emulator includes the following character sets:

ASCII (7-bit and 8-bit)
DEC Supplemental Graphic
ISO Latin Alphabet 1 supplemental graphic
12 National Replacement Character sets

The default character set configuration in the NCD Terminal Emulator is called the Digital Multinational character set. It is composed of the ASCII character set and the Digital Supplemental Graphic character set. The NCD Terminal Emulator maps the ASCII character set into the left side of the character table (see Table 12-21) as the GL codes. It maps the Digital Supplemental Graphic set into the right half (see Table 12-22) as the GR codes.

The ISO Latin Alphabet 1 supplemental graphic set is composed of the ASCII set and the ISO Latin-1 supplemental set. (See Table 12-23.) It includes many of the accented characters and diacritical marks used in European languages. To use the ISO Latin Alphabet 1 supplemental graphic character set, you select the ISO Latin 1 Font toggle in the Options menu.

By default, the NCD Terminal Emulator's ASCII character set is 8-bit ASCII. To change to 7-bit mode, use the Strip Parity toggle in the Options menu.

The 12 National Replacement Character sets are 7-bit character sets used with European language keyboards. (See Table 12-24.) Each varies slightly from the ASCII character set as required by the European language for which it is used.

Character Code Tables

The code tables in this section describe the character codes for the character sets included in NCD Terminal Emulator. The following conventions are used in the code tables:

Columns and rows are numbered in the top row and right-most or left-most columns. The character codes are sometimes referred to by columnnumber/rownumber. For example, in the Digital Multinational Character set, Table 12-21, the character 1/0 is the control character DLE.
The binary representation of a character is obtained by finding the character code in the table, then looking at the binary representations next to the character's column and row numbers.
The octal, decimal, and hexadecimal representations of each character are listed to its right; the octal representation is the top number, decimal representation is the middle number, and the hexadecimal representation is the bottom number. For example:

ESC 107

Octal

71

Decimal

45

Hexadecimal

Table 12-21 Digital Multinational Character Set: C0 and GL Codes

	Column				0		1		2		3		4		5		6		7
Row				b8	0		0		0		0		0		0		0		0
	BITS			b7	0		0		0		0		1		1		1		1
				b6	0		0		1		1		0		0		1		1
				b5	0		1		0		1		0		1		0		1
	b4	b3	b2	b1	CO CODES				GL CODES (ASCII GRAPHIC)
0	0	0	0	0	NUL	o o o	DLE	20 16 10	SP	40 32 20	0	60 48 30	@	100 64 40	P	120 80 50	grave accent 1	140 96 60	p	160 112 70
1	0	0	0	1	SOH	1 1 1	DC1	21 17 11	!	41 33 21	1	61 49 31	A	101 65 41	Q	121 81 51	a	141 97 61	q	161 113 71
2	0	0	1	0	STX	2 2 2	DC2	22 18 12	"	42 34 22	2	62 50 32	B	102 66 42	R	122 82 52	b	142 98 62	r	162 114 72
3	0	0	1	1	ETX	3 3 3	DC3	23 19 13	#	43 35 23	3	63 51 33	C	103 67 43	S	123 83 53	c	143 99 63	s	163 115 73
4	0	1	0	0	EOT	4 4 4	DC4	24 20 14	$	44 36 24	4	64 52 34	D	104 68 44	T	124 84 54	d	144 100 64	t	164 116 74
5	0	1	0	1	ENQ	5 5 5	NAK	25 21 15	%	45 37 25	5	65 53 35	E	105 69 45	U	125 85 55	e	145 101 65	u	165 117 75
6	0	1	1	0	ACK	6 6 6	SYN	26 22 16	&	46 38 26	6	66 54 36	F	106 70 46	V	126 86 56	f	146 102 66	v	166 118 76
7	0	1	1	1	BEL	7 7 7	ETB	27 23 17	`	47 39 27	7	67 55 37	G	107 71 47	W	12787 57	g	147 103 67	w	167 119 77
8	1	0	0	0	BS	10 8 8	CAN	30 24 18	(	50 40 28	8	70 56 38	H	110 72 48	X	130 88 58	h	150 104 68	x	170 120 78
9	1	0	0	1	HT	11 9 9	EM	31 25 19	)	51 41 29	9	71 57 39	I	111 73 49	Y	131 89 59	i	151 105 69	y	171 121 79
10	1	0	1	0	LF	12 10 A	SUB	32 26 1A	*	52 42 2A	:	72 58 3A	J	112 74 4A	Z	132 90 5A	j	152 106 6A	z	172 122 7A
11	1	0	1	1	VT	13 11 B	ESC	33 27 1B	+	53 43 2B	;	73 59 3B	K	113 75 4B	[	133 91 5B	k	153 107 6B	{	173 123 7B
12	1	1	0	0	FF	14 12 C	FS	34 28 1C	,	54 44 2C	<	74 60 3C	L	114 76 4C	\	134 92 5C	1	154 108 6C	\|	174 124 7C
13	1	1	0	1	CR	15 13 D	GS	35 29 1D	-	55 45 2D	=	75 61 3D	M	115 77 4D	]	135 93 5D	m	155 109 6D	}	175 125 7D
14	1	1	1	0	SO	16 14 E	RS	36 30 1E	.	56 46 2E	>	76 62 3E	N	116 78 4E	^	136 94 5E	n	156 110 6E	~	176 126 7E
15	1	1	1	1	S1	17 15 F	US	37 31 1F	/	57 47 2F	?	77 63 3F	O	117 79 4F	_	137 95 5F	o	157 111 6F	DEL	177 127 7F

Table 12-22 Digital Multinational Character Set: C1 and GR Codes

8		9		10		11		12		13		14		15		Column
1		1		1		1		1		1		1		1		b8				Row
0		0		0		0		1		1		1		1		b7		BITS
0		0		1		1		0		0		1		1		b6
0		1		0		1		0		1		0		1		b5
C1 CODES				GR CODES (Digital SUPPLEMENTAL GRAPHICS)												b4	b3	b2	b1
	200 128 80	DCS	220 144 90		240 160 A0	º	260 176 B0	À	300 192 C0		320 208 D0	à	340 224 E0		360 240 F0	0	0	0	0	0
	201 129 81	PU1	221 145 91	¡	241 161 A1	±	261 177 B1	Á	301 193 C1	Ñ	321 209 D1	á	341 225 E1	ñ	361 241 F1	0	0	0	1	1
	202 130 82	PU2	222 146 92	¢	242 162 A2	2	262 178 B2	Â	302 194 C2	Ò	322 210 D2	â	342 226 E2	ò	362 242 F2	0	0	1	0	2
	203 131 83	STS	223 147 93	£	243 163 A3	3	263 179 B3	Ã	303 195 C3	Ó	323 211 D3	ã	343 227 E3	ó	363 243 F3	0	0	1	1	3
IND	204 132 84	CCH	224 148 94		244 164 A4		264 180 B4	Ä	304 196 C4	Ô	324 212 D4	ä	344 228 E4	ô	364 244 F4	0	1	0	0	4
NEL	205 133 85	MW	225 149 95	¥	245 165 A5	µ	265 181 B5	Å	305 197 C5	Õ	325 213 D5	å	345 229 E5	õ	365 245 F5	0	1	0	1	5
SSA	206 134 86	SPA	226 150 96		246 166 A6	¶	266 182 B6	Æ	306 198 C6	Ö	326 214 D6	æ	346 230 E6	ö	366 246 F6	0	1	1	0	6
ESA	207 135 87	EPA	227 151 97	§	247 167 A7	·	267 183 B7	Ç	307 199 C7		327 215 D7	ç	347 231 E7		367 247 F7	0	1	1	1	7
HTS	210 136 88		230 152 98	¤	250 168 A8		270 184 B8	È	310 200 C8	ø	330 216 D8	è	350 232 E8	ø	370 248 F	1	0	0	0	8
HTJ	211 137 89		231 153 99	©	251 169 A9	1	271 185 B9	É	311 201 C9	Ù	331 217 D9	é	351 233 E9	ù	371 249 F9	1	0	0	1	9
VTS	212 138 8A		232 154 9A	ª	252 170 AA	º	272 186 BA	Ê	312 202 CA	Ú	332 218 DA	ê	352 234 EA	ú	372 250 FA	1	0	1	0	10
PLD	213 139 8B	CSI	155 171 9B	«	253 171 AB	»	273 187 BB	Ë	313 203 CB	Û	333 219 DB	ë	353 235 EB	û	373 251 FB	1	0	1	1	11
PLU	214 140 8C	ST	234 156 9C		254 172 AC	1/4	274188 BC	ì	314 204 CC	Û	334 220 DC	ì	354 236 EC	ü	374 252 FC	1	1	0	0	12
RI	215 141 8D	OSC	235 157 9D		255 173 AD	1/2	275 189 BD	Í	315 205 CD	Y umlaut 1	335 221 DD	í	355 237 ED	ÿ	375 253 FD	1	1	0	1	13
SS2	216 142 8E	PM	236 158 9E		256 174 AE		276 190 BE	Î	316 206 CE		336 222 DE	î	356 238 EE		376 254 FE	1	1	1	0	14
SS3	217 143 8F	APC	237 159 9F		257 175 AF	¿	277 191 BF	Ï	317 207 CF	ß	337 223 DF	ï	357 239 EF		377 255 FF	1	1	1	1	15

Table 12-23 ISO Latin-1 Supplemental Character Set: C1 and GR Codes

8		9		10		11		12		13		14		15		Column
1		1		1		1		1		1		1		1		b8				Row
0		0		0		0		1		1		1		1		b7		BITS
0		0		1		1		0		0		1		1		b6
0		1		0		1		0		1		0		1		b5
C1 CODES				GR CODES (ISO LATIN-1 SUPPLEMENTAL GRAPHICS)												b4	b3	b2	b1
	200 128 80	DCS	220 144 90	NBSP	240 160 A0	º	260 176 B0	À	300 192 C0	capital Iceld. eth¹	320 208 D0	à	340 224 E0	small Iceld. eth¹	360 240 F0	0	0	0	0	0
	201 129 81	PU1	221 145 91	¡	241 161 A1	±	261 177 B1	Á	301 193 C1	Ñ	321 209 D1	á	341 225 E1	ñ	361 241 F1	0	0	0	1	1
	202 130 82	PU2	222 146 92	¢	242 162 A2	2	262 178 B2	Â	302 194 C2	Ò	322 210 D2	â	342 226 E2	ò	362 242 F2	0	0	1	0	2
	203 131 83	STS	223 147 93	£	243 163 A3	3	263 179 B3	Ã	303 195 C3	Ó	323 211 D3	ã	343 227 E3	ó	363 243 F3	0	0	1	1	3
IND	204 132 84	CCH	224 148 94	¤	244 164 A4	´	264 180 B4	Ä	304 196 C4	Ô	324 212 D4	ä	344 228 E4	ô	364 244 F4	0	1	0	0	4
NEL	205 133 85	MW	225 149 95	¥	245 165 A5	µ	265 181 B5	Å	305 197 C5	Õ	325 213 D5	å	345 229 E5	õ	365 245 F5	0	1	0	1	5
SSA	206 134 86	SPA	226 150 96	broken bar¹	246 166 A6	¶	266 182 B6	Æ	306 198 C6	Ö	326 214 D6	æ	346 230 E6	ö	366 246 F6	0	1	1	0	6
ESA	207 135 87	EPA	227 151 97	§	247 167 A7	·	267 183 B7	Ç	307 199 C7	X	327 215 D7	ç	347 231 E7	÷	367 247 F7	0	1	1	1	7
HTS	210 136 88		230 152 98	"	250 168 A8	´	270 184 B8	È	310 200 C8	ø	330 216 D8	è	350 232 E8	ø	370 248 F8	1	0	0	0	8
HTJ	211 137 89		231 153 99	©	251 169 A9	1	271 185 B9	É	311 201 C9	Ù	331 217 D9	é	351 233 E9	ù	371 249 F9	1	0	0	1	9
VTS	212 138 8A		232 154 9A	ª	252 170 AA	º	272 186 BA	Ê	312 202 CA	Ú	332 218 DA	ê	352 234 EA	ú	372 250 FA	1	0	1	0	10
PLD	213 139 8B	CSI	233 155 9B	«	253 171 AB	»	273 187 BB	Ë	313 203 CB	Û	333 219 DB	ë	353 235 EB	û	373 251 FB	1	0	1	1	11
PLU	214 140 8C	ST	234 156 9C	¬	254172AC	1/4	274 188 BC	Ì	314 204 CC	Ü	334 220 DC	ì	354 236 EC	ü	374 252 FC	1	1	0	0	12
RI	215 141 8D	OSC	235 157 9D	_	255 173 AD	1/2	275 189 BD	Í	315 205 CD	Y acute¹	335 221 DD	í	355 237 ED	y acute¹	375 253 FD	1	1	0	1	13
SS2	216 142 8E	PM	236 158 9E	®	256 174 AE	3/4	276 190 BE	Î	316 206 CE	EC	336 222 DE	î	356 238 EE	small Iceld. thorn¹	376 254 FE	1	1	1	0	14
SS3	217 143 8F	APC	237 159 9F	-	257 175 AF	¿	277 191 BF	Ï	317 207 CF	ß	337 223 DF	ï	357 239 EF	ÿ	377 255 FF	1	1	1	1	15

: ¹This character is illustrated in Table 12-20.

Table 12-24 National Replacement Character Sets

Character Set	2/3	4/0	5/11	5/12	5/13	5/14	5/15	6/0	7/11	7/12	7/13	7/14
ASCII	#	@	[	\	]	^	-	grave accent 1	{	\|	}	~
United Kingdom	£	@	[	\	]	^	-	grave accent ¹	{	\|	}	~
Dutch	£	3§4	ÿ	1/2	\|	^	-	grave accent ¹	¨		1/4	´
Finnish	#	@	Ä	Ö	Å	Ü	-	é	ä	ö	å	ü
French	£	à	º	ç	§	^	-	grave accent ¹	é	ù	è	¨
French Canadian	#	à	â	ç	ê	î	-	ô	é	ù	è	û
German	#	§	Ä	Ö	Ü	^	-	grave accent ¹	ä	ö	ü	ß
Italian	£	§	degree ¹	ç	é	^	-	ù	à	ò	è	ì
Norwegian/Danish	#	@	Æ	Ø	Å	^	-	grave accent ¹	æ	ø	å	~
Portuguese	#	@	Ã	Ç	Õ	^	-	grave accent ¹	ã	ç	õ	~
Spanish	£	§	¡	Ñ	¿	^	-	grave accent ¹	grave accent ¹	º	ñ	ç
Swedish	#	É	Ä	Ö	Å	Ü	-	é	ä	ö	å	ü
Swiss	ù	à	é	ç	ê	î	è	ô	ä	ö	ü	û

: ¹This character is illustrated in Table 12-20.

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VT320 Character Coding Conventions

Character Sets

Character Code Tables

Table 12-21 Digital Multinational Character Set: C0 and GL Codes

Table 12-22 Digital Multinational Character Set: C1 and GR Codes

Table 12-23 ISO Latin-1 Supplemental Character Set: C1 and GR Codes

Table 12-24 National Replacement Character Sets

Character Set

2/3

4/0

5/11

5/12

5/13

5/14

5/15

6/0

7/11

7/12

7/13

7/14