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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:

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:


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 accent1

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 umlaut1

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

1 This 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

1 This character is illustrated in Table 12-20.




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