Digital PDFs

EK-VT220-HR-002

July 1984

56 pages

Original

1.7MB

Document:	VT220 Programmer Pocket Guide
Order Number:	EK-VT220-HR
Revision:	002
Pages:	56
Original Filename:	http://bitsavers.org/pdf/dec/terminal/vt220/EK-VT220_HR-002_VT220_Programmer_Pocket_Guide_198407.pdf

OCR Text

VT220
ProgrammeO
r Pocket Guide

EK-VT220-HR-002

VT220
Programmer Pocket Guide

Digital Equipment Corporation

1 st Edition, August 1983
2nd Edition, July 1984
Copyright" 1983, 1984 by Digital Equipment Corporation.
All Rights Reserved.
Printed in U.S.A
The reproduction of this material, in part or whole, is strictly
prohibited. For copy information, contact the Educational
Services Department, Digital Equipment Corporation, Maynard,
Massachusetts 01754.
The information in this document is subject to change without
notice. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document.
The following are trademarks of Digital Equipment Corporation,
Maynard, Massachusetts.

mamalla

DEC
DECmate
DECnet
DECsystem-10
DECSYSTEM-20
DECUS
DECwriter

DIBOL
LA
MASSBUS
PDP
P/OS
Professional
Rainbow

RSTS
RSX
UNIBUS

VAX
VMS
VT
Work Processor

CONTENTS
Character Encoding ...................................... 2
7-Bit Code ..................................... 2
7-Bit ASCII Code Table........................ 2
8-Bit Code ..................................... 3
8-Bit Code Table ........... '" . . . . . . . . .. . . . . . .. 3
DEC Multinational CharacterSet(CO and GL) .. .. 4
DEC Multinational CharacterSet(C1 andGR).... 5
DEC Special Graphics ......................... 6
British Character Set .......................... 7
Dutch NRC Set ................................ 8
Finnish NRC Set............................... 9
French NRC Set ............................... 10
French Canadian NRC Set ..................... 11
German NRC Set .............................. 12
Italian NRC Set ................................ 13
Norwegian/Danish NRC Set ................... 14
Spanish NRC Set .............................. 15
Swedish NRC Set .............................. 16
Swiss NRC Set ................................ 17
Display Controls Font. . . . . . . . . . . . . . . . . . . . . . . . .. 18
Escape Sequences ............................ 20
Control Sequences ............................ 20
Device Control Strings ......................... 20
Transmitted Codes ...................... .'................ 21
Main Keypad Function Keys ................... 21
Editing Keys ................................... 21
Cursor Control Keys ........................... 21
Auxiliary Keypad Keys ....................... " 22
Top Row Function Keys ....................... 23
Keys Used to Generate 7-Bit Control
Characters ..................................... 24
Received Codes .......................................... 25
Compatibility Level (DECSCL) ................. 25
CO (ASCII) Control Character Recognized ..... 25
C1 Control Characters Recognized .......... " 27
Character Set Selection (SCS) ................. 28
Designating Hard Character Sets .......... 28
Designating Soft Character Sets ........... 29
Invoking Character Sets Using Lock Shifts ... 29
Invoking Character Sets Using Single
Shifts ....................................... 30
Select C1 Control Transmission ............... 30
Terminal Modes ................................ 31

iii

iv
Cursor Positioning ............................. 32
Tab Stops ...................................... 34
Select Graphic Rendition (SGR) ............... 34
Select Character Attributes (DECSCA) ......... 35
line Attributes ................................. 35
Editing ......................................... 36
Erasing ........................................ 36
Set Top and Bottom Margins (DECSTBM) ..... 37
Printing ........................................ 38
User Defined Keys (DECUDK) .................. 39
Down-line-Loading Characters (DRCS) ........ 40
DECDLD Parameter Characters .......... ,. 40
Clearing a Down-line Loaded Character
Set ......................................... 41
Reports ........................................ 41
Device Attributes (DA) ...................... 41
Device Status Report (DSR) ................ 42
DSR - Printer Port .......................... 43
DSR - User Defined Keys
(VT200 mode only) ......................... 43
DSR - Keyboard Language ................ 44
Identification (DEClO) ...................... 44
Terminal Reset ................................ 44
Tests (DECTSn ................................ 45
Adjustments (DECALN) ........................ 45
VT52 Escape Sequences ...................... 45

This pocket guide provides a summary of the information
contained in the VT220 Programmer Reference Manual
(EK-VT220-RM) which you can order from Digital. The guide
provides a quick reference tool for people with a knowledge of
computer programming to access the VT220 features.

2
CHARACTER ENCODING
7·Bit Code
BIT

BIT

7654321

3 MOST
SIGNIFICANT BITS

4 LEAST
SIGNIFICANT BITS

(DECIMAL VALUE IS
COLUMN IN
CODE TABLE)

(DECIMAL VALUE
IS ROW IN
CODE TABLE)

7·Bit ASCII Code Table
0

COlUMN

•

BITS

r'Ow

t>4b3b2bl

0000

"0 "

"
NUL " OLE '"
'"
""

SOH

: ~£1 "

"
SP
00

0
1

""
.,""

,, DC. "" " " •
""
"
"
" # '" 3 "
ETX
3
""
~ R£~
"
..
n"
DC_
$
4
" , " " EOT
,.
""
.,
"
%
"'"
ENQ , NAK "
5
5 ",
"
"
,
"
"
'"
&
6
"
ACK
SVN "
6
,
""
"
"
, , BEL ; ETB
7
"
"" 7 """
m
w
(
BS '" CAN
8
8 ,"
,"
""
"
)
HT
" 9 "
EM "
9
"
"
,.
LF " SUB "
"
10
" * "" , ""
'"
"
+ "
11
" , VT " ESC
"'" : "",.
"
FF ,
F5
<
'"
"
"
" . ".,
"
CO "
13
= ""
"
" GS "'"
'"
'"
50 "
I.
> "
" 05 '"
"
51
15
, US "" I "" ? "
"
"

• ""

STX

A
B
C

. .
%

KEY
CHAflACHRETIJ33 OCTAL

DECIMAL

HEX

'"'
'""
"
'"'"
00

'",

L
M
N
0

Q
0
5
T

..
..
n

""
""

00
00

• "

00
00

'""'
,"
00

'00

....

· .
",

Z
[

'"
'"'
'"n
'"n

'"
'"
",

"
'""

.." • ,..".. .
'"....
'",
,... '""
w

;

'"
00

'""
"
'"
'"
134

'"
"
'"

I
m

m
,"

"
""

..
'"

n
0

'"n

H"
'00

'"'

w '""

.. ,

"
'"

""
'""
"
'"
"
'"
,,."
'""
"
;0

....
'"'..
"

'00

..
,.
. '"'

{

"
no

"
"
}
'"
n,
,.'"
n"
",n
m"
'" DEL
no

,... "

3
8-BltCode
BIT
BIT
BIT
BIT
BIT
BIT
BIT
BIT
81654321

4 MOST

SIGNIFICANT 81TS

4 lEAST
SIGNIFICANT BITS

(DECIMAL VALUE IS
COLUMN IN
CODETA8LEI

(DECIMAL VALUE
IS ROW IN
CODE TA8LE)

8-Blt Code Table

s:: .... ....
00

Iff

DCS

11/

SOH

DCl

STX

DC2

PU2

ETl1

DC3

EOT

EHQ

...

NEL

ETB

£SA

EPA

CAN

HTS

BEL

HTJ

S1II

VTS

ESC

PLD

1'LU

osc

SS2

SS3

IOI'C

... ....

"'"

COt

Iff

STS

..,

DCA

SYN

DEL

"'"

11/

!..I'co=coo<=s·~I-·---GLCODES---.j.I"'C'"lCOOE=",~ofl---"COOES~

Ifo·----7...,.CODET....~

4
DEC Multinational Character Set (CO and GL Codes)

""~

., alTs
~

boIb3b2b1

0000

... ... .., .. .,•.. ., . . . ., ,
·· " .· ... • .., .... · ,.,.... ".
·,, " .," .,.."" .. · '"
0

NUL

DLE

0001

,
"
,!

"" !
STX ,
,, DC2 "" "
"
ETX ,
, e£~ ""
,."
EQT : ac.
s
,
~1

SOH

"
"

.. a "...,
~

. . ···
. ·
• . ·
10

. • ...
.
·.
..

...

II' 0 '

·•

1 00'

·
K

·
.
.

KEY
CHARACTEIIETI]lJ OCTAL

DECIMAL

HEX

'".,u
'"
,,.""

"
'""

",ro

'""

.... ... .. • ''"'"".""
.. '".. • '",.. "'".
'"
. '"'"." '"'".. · '"
'"
'"
'
"."" n..." ,'".." ".""
'"
.." '".. ,,.",'". , '"'""
'"."
'"..
.. {• '"'",.
'"
'"
'"
'"
.." , ." ,.,'". . '""
'"
,"
,,.

'"
"
m
K'

,ro

[

"
'""

'""

'"
",

.'" '"'"."" ,,.'""" '"'"'"""
· · '"..."" - '"" • '"'". '"'""..
"
·
y

"" 3 " C
3
""
""
•
",. • .." D
ENQ
NAK "
5
"" 'II "" s "" E
,
,.
, , ACK
SYN "
• .." F
•
" a
, , , BEL ,, ETa ""
"
7
""
"" 7 ""ro G
as ",, CAN "" (
8
H
8
"
" ) "
HT " Ell "
"
""
"", I
LF " sua "
"
J
10 ,. ,
:
,.
,.
"
"" * "
n
,
..
VT ", ESC " + .,
"
K
11
:
""
"
FF
.." L
12 , " ,
" FS """
"
.. <.. "" II
,
,
CR "
GS "
13
,
"
"
"'"
"
"
, , , SQ ", RS "»»
14
> " N
n
"
, , 51
15
" US "" I "" ? " Q
0100

}

'" DEL

5
DEC Multinational Character Set (C1 and GR Codes)

I---Cl COOES,---+----(OEC SLf'PL~GRAPHICS)'------I

6
DEC Special Graphics

e"~

COLUMN

BITS

114838281

",
,,

•

0000

NUL

OLE

·
··

@
A
B
C

'00

"
'"'
'"'"
"
'"':"
00

R
S
T

"
'"n

"
on

•
I

I
""
'"" \
"

- '""
m
'"
" - '"
00
00·

",
"
'"

SCANJ

SCANS

~~,

.. \ ".. f '""."
. \ '" i '"
,." , '""
,.."
.
SCAN 9

·
.
.,
. · . ... .
. .
",
.

SP "
0
""
"
"
1 , ",
SOH : ~£1 "
! " 1 "
,,
"
"
,
• "' , STl( ,, DC2 """ " "" • "
" 3
ETX ,
3 , "
, Px£~ ""
"
"
,
,
,
,
" 4 "
4
EDT
0C4 "
"
" S
, ENO ,, NAK " %
~
5
5
"
"
",
"
6
ACK
SYN
&
6
~
,
"
7
7
BEL
ETB "
"
"""
"
,
(
"
BS
8
CAN
8
'" ,
,
"
"
9
' , HT ,, EM "" ) ", 9 "
"
, LF ", SUB "",
"
"
10
"
"
* "" , ""
, , VT ", ESC " + " ; "
11
""
"
'"
"
' , FF "e FS "
"13 , , CR GS "" - " < ""
""
"
"
""
, SO "," RS '"
14
> ""
=
"
"
SI
1S
" US " I " ? """

K
L
M
N

W
X

T
'"
'"'
,oo
'"
'"' I "
'" I '" S
'"
"
m
on
",
J
~
'"
"
no
" 1 '" • '"
'""
".
'"oc
"" r '"
"
'"
''""
L
£
'"'"
"
'"
"
,oo
,.
t
"
" - '""
'""
DEL '"
'
"

. , .

'"
"
".
"
'"
'"
""
'"

[

]
A

19 (lllANI(I

SCA,Nl

I-----COCODES---f------'(DECS:C~~APHICS1--'------I

KEY

I I:::"

e"'"~"'1 ESC :~

HEX

7
British Character Set
0

COLUMN

BITS

1>4 "3 b~ ",

0000

•

7
'

9
10

BS
HT

"
~

"'"
!
SOH : ~£1 "
STX ,
, DC2 "" "
,
"
" £
ETX
~ R£~ "
"
EDT
ro
DC. "
$
"
%
NAK
END ,
,
""
"
" ACK : SVN "" &
BEL
; ETB "

000

OLE

NUL

IF
YT

' , 0'

· .

'"
"
'"

'""

0
1

"
""
"
"
"""
"

"
"
"
""
00
~

• ""
5

"
""

'"'
'"'
"
'"
""
"
"
'"
'"'"
M

,ro

"
""

·•

'00

'"
" • "

'""w

'"
"
''""
".
"
'"

. ·, · ".

'"'
'"
'"'

'"
"
'"

·
.. • . ..
·
.
·
·
.
·.
. , .. ,.
· .·
,.
·.
- ".
· ·
. ..
6

7
"
"
"
(
8
CAN
""
"
, EM " )
9
"
"
"
"
SUB
, "
*
"
"
"
ESC "
"" ; ""
""
"
<
", FS """
"
"
GS
"
"
"'"
"
", RS
>
"""
"
"
" US "" I "" ? "
»

KEY
OiARACTEREmJJ OCTAL
21

D~CIMAl

'00

0
0
0

.OW

•

"
""
'"
""
'""
".
"
'"
"
'""
m
.,
00

X
V

[

'"w

'"
"
'"
""
"
'0"
00

I
j

]

'"
"

'00

w
x

'" y
'" z
"
'" {
,~

'00

'"" I
'"
'" }
00

,oo

"
"
'"
'""
'"
'"
'""
'"
'"'"
'"
'"

'"" DEL m
'"
"

8
Dutch NRC Set (Dutch Keyboard Selection)

.. .. . . . ... . • .
··
.
..
.. .. ..
·
....
,,
· ,
,
0

COLUMN

,,..

., BITS
~

0000

NUL

OLE

···
. ···
··
,•
. ·
·

•.
.

.
.

~ 1 I

b4b3b21>1

",.
0
"" SP
, SOH ,,, ~1 "" I " 1 "" A
1
"n
'"
""
n
"
STX , DC2
2
" "n 2 ""n B
"
"
,
"
n
3 " , , ETX ,, R£~
"" £ "" 3 "" C
"
"
EOT
DC4
4
'"..
" "
" 4 "" D
NAK "
5 , , , , ENO
"" II " 5 "" E
n
ACK
SYN "
8
',
•, =" • ...." F
,,
"
,
,
n
BEL , ETB "
7
"" 7 " G
"
(
BS " CAN "
"" 8 .."" H
" "
, " , HT n, Ell "" ) "" II "n I
"
""n
""
.,"
LF " SUB "
J
10 ' , ,
"
"" * " :
VT "
n ESC "
K
"
+
"
11 ,
"
.." ..,." ",. <; "" L
12 , , , , FF , FS a
"
'"
'"..
13
" CR "", GS """ - '" " ""m II
, , , SO ", RS "
e
14
> "" N
""
, , , SI
.," ? " 0
I
US "
15
"
""
""

~
~

..,

"" S
T
,
U
,
" v
'"" W
"
'" X
'" Y
'" Z
'" II
" 'h
n.
" I
'" A

......
..
.

'" ,
"
'"
"
on
,n""
""

"
"
'""
'""

• ..

'"
'"'"

'"n."

. d ...,m" •t ,.."
..

..
"....."
'""
"
'"....
'"...
'"

'"
,,.

'"
,

"
n•
'"
n,
'""
W
"
'"
x
'"
Y
'"
z '"
'"
"
'"
'"'"
,'"
'M
'" f '"
,,"
"
'"
~
w
'"'"
'"
'"
'"
"
'" DEL '"
on

'"
'"
'm
,'""
,,.
'"
n,,
M

I
k

" 1
'"'"" m
'"" n
R

..
..,....

· ··

.
.." - ..

...

.. ..
...

...

Finnish NRC Set (Finnish Keyboard Selection)
COUJMN

., BITS
"'
~

•
0

,." SP
•
:
!
SOH : ~£1 "
1
,
DC. "
STX
"
•
"
~
,
"
ETX ,
3
, R£~ "" #
"
EOT
DC. "
$
•
,,
%
ENQ
NAK
""
•
ACK
6
: SVN "" &
BEL
7
: ETB ""
o. BS
" (
CAN ,.
8
"
HT , Ell "
9
"" )
,. SUB "
IF "
VT " ESC "
11
"" +
FF ,
" FS "
,
CR
13 ' ,
" GS "" SO "
RS
""
US
~

NUL

DlE

~
~

"
""
"
"

2
3

"
"
"
"
""
""
""
"

. •.

'00
~

.,
,.,

B
C

"
,""

.
.
.

00
~

'"
'""

""
'"
"

'""

'""
~

'"ro

","
"

• ''""

.
.
.. ." . . · .. · .
. . . ,. • ..
m

"
""
"

"
"
",
""
"
"""
""
"

.
·
· . ::.

• "
1

000

. .

'''b3b2bl

0 000

I.
I.
,.
I.

•

0
0

"
"

""
"ro
8
"
9
"
, ""
"
""
;
,."
<
"
= ""
"
> ""
"
?
""
7

G
H

1
J
K
L
II
N

'"
"
"0

"
"
",

'"
'"
'"
"

W
X
V

•
j

.
.

'00

;; "
""
'"
" ;. "
'" il" ,oo
"
""
'"
'"
"
"

'"
'""
,

. A ,."
'"

'00

'""

,. ·..
'00

,.,

.
"

'"
'",ro
,~

'""

'"
'"

'"
".
".
'""
"
'"

,.. ,.
"

'"'00 ,;

,,.

'" DEL mm

French NRC Set
(Flemish and French/Belgian Keyboard Selections)
0

OOLUMt.I

•

BITS

"
"
"
"
",
m
NUL , DLE
0
"
"" SP " 0
, SOH , ~1 " ! " 1 "
1
"
'"
"
"
, , STX ,,, DC. "" " ""
"
"
•"
,,
"
""
"
"
3
ETX , ~S~ "
3 " ,
""
" 4 ""
,,
"
EOT : DC.
• "
"
"
NAK "
5 ' , , , ENO
"
" 5 ""
8
SVN "
8 ' , , , ACK
»
""
,
""",. 7 "
7 , , , BEL ,, ETa "
""
"
"
BS " CAN
8
"" ( " B
" "
"
,
)
"
HT " EM "
9
9
"
""
'"
.,"
, , LF ", SUB ""
10
"
"
"" * "" , ""
, VT " ESC " + " ; "
11
""
"
"
"
"
"
I. , , , FF "", FS "
< mx
"
'"
, , CR ", GS " ""
13
"
"
""
,
'"
14 , , , , SO " RS
>
"xn
""
S. ", US "
15
"" I "" ? u

1>4b3b2bl

0000

•

• ..

""
~
A
B
C

....

'"
"
'm
"
~

'00

"
.. ...:
..
M

S
T

·.
,"

'00

'"
'"
'"
'"
'"
"
'"'"
"
'""

· .. •
..
.... · ...... · .
~

'"
"
on

"
'""
"

"
'""

'""

"
,""

".
'" • ..
·
..
··· •" .. .... '".. .... • ,.. '".
".
""
.
..
..
.
..
'",
··..
.. .. '"... .. · ,
. .. '"..
'"
.. '".. ".." '".. ,
.. ,.
· . ....
".
,
,....
"
,.
.. ..
" • "..
.. ....
". .. '""
. .. .. '"
·
.. "
M
E

KEY

OCTAL
O~CIPIIAL

1811£)1

E
F

CIl. . ~ACTiREill33

v '"

"
W '"
""
'" X
"
'" v
'" Z
'"
"
n.
9
"
m
n."
"
""
'"" A
'"
'""

M
N

'"
"
'00

'""
"
'ro

,'"
u

'"
"
'"

'""
,
"
n,

'"
'"

"
"
'"
"
'"

"
on
'"n, DEL '"
~

French Canadian NRC Set
(French Canadian Keyboard Selection)

0 0 0

,
00

5
0

ACK

BEL

"
15

"
#
$

"
"
"
"
~

1
2

•

. ... •

: SYN ""
;

ETB

..
ro

.."

"""
"'
"""
""
"
"
""
""
"
"
~

"
"
,, CAN " ( "ro 8
BS "
"
"
)
HT ,
EM
""
" •
LF
SUB "
* ,." ,
VT
ESC "
+
""" ; """
""
FF ,
"
" < ro
FS
""
"
"
"
CR
" GS "" - "" = ""
"
"
so '," RS "
" > ""
"
"
"
SI
US
" I " ? ""'
"
"
"
>0

~
A
B
C

'00

"ro
'"
'"
"
'00
",
"

0
E

0
R
S
T
U

F
G
H

,m
ro
;0

12
13

m
OLE

"
SOH
~£~ "
,,:
STX , DC2 "
"
"
ETX
~ ~£~
"
EOT
DC. m
"
:
END
NAK "
:

0
0

NUL

•

BITS

"0" 1>4 03 02 bl

CQlUMtI

'"
"
on
""
'"
"

....
....
'"..
"

A '""

~
""
" a
"
'" ,

"
"."
'"

'00

'"
" • ,

"
",

'""

"
'"
'""
"

"
'""

.
u

v
w

'"
'"

;

,",
'""

'","
,",
"

"
'""
'"

","'
"'
'"",

, '"

'"
'00

,"'

n
0

.. & '",,."

'""
"

'ro

'"
'
'"

...:: · ,...

.."

","

"
"0

"
"
~
"
", DEL ","
"'
"
'"

12
German NRC Set (German Keyboard Selection)
COlUMN

. "' " "

BITS

reo.

b4b3b2bl

0000

NUL

OLE

"
"'"

"
"
"
"
"
"
"
",

""
SOH
1
R£1 "" ! " 1
,
OC2 "
2
STX
" " 2
,,~
"
"
3
ETX , ~£~ "
3
# "
""
" 4
EOT
OC4 w
"
$
4
" ""
,,
"
,
5
" " END ,, NAK """, % "" 5 "
,
6 ",
" ACK , SVN "" & ~ 6
BEL , ETB "
7
""
7
"
"
"
(
BS
"
CAN
8
"
8 ' "
"
""
'"'"
)
HT
" 9 "
EM "
9 ,
"
""
'"
'"
LF " SUB ,"
"
10 ' "
"
* " , ""
"
"
VT " ESC "
11 , " ,
,." ; "
'"
,."
FF ,
FS
12
<
"
"
"
"
13 ' , " , CR " GS
- '" = """'"
'"'"
14
* > "
" SO , RS '""
"
"n
SI
"
US
I
15
"
""" ? ""
"
0" "

.
..

.
~

§
A

.
.
.

0
E

."'" • '"
. '""

'00

'""

,""

KEY
21

DECIMAL

HEX

'00

,.."" • ''".."
m

.
.
'" A '"
.
'"
'"

'"
'"

;

" 0
'"n ii
" A

'",.

"."

"
'""
'""

- '"""

'"
'"
',""

..
'".
,..
"
'"..
,
,

n
0

1i
0

CHARACHREillJJ OCTAl

'"
"

'""
'""
"
'""

"
"
'"
'" , '"
'""
'""
'"
"
"
t
'"
'"
,
,

·• . •
.
..
.. .. • .... · .
. ,.:. · .... ...
·

'00

.
.
.. .
· ..
·
. ....
·
· . . .. .. .
F

.." • '"'"

"0
00

'"
"
'"
'"

'"
n,"

'"m
'"
""
"
'" OEL '"
'"
"
Jl

Italian NRC Set (Italian Keyboard Selection)
a

COLU"'~

•

.
. ..
·
..
..
:
'"
·....·. ·
.. ..
""
•
[:H
"
,,
·
,
..
.
..
"
,
•
· . , ~£~l :~
"
• "
• ·.
...." ..""
·
• · ·.
!~ •
.. I'"
,,
..
· · : I •" illIE • .. .., .. · .,.... ..
•
.. , · ,,,,,,
·.·. ,:
..
..
".. " ...... · ,,.
"
.. ..
.. ·
.. · · . " , ....
"
"
i;
. ,,,.. • ,,," ....
,
" ··
"
=
.. ., ,... ..
"
"
"
· so! ::
"
..
"
",

.. ..

BITS

''''"31'20'

NUL:

OLE

SOHi

~£.1

STX I

DC'

ETX! ~

NAK! "
~~

SVN

""
BS " CAN "
""
HT
EM "
""
LF " SUB "
"
"

END

ACK
BEL

DC41~

EDT

""
"

VT
FF

"
"""
""

(

""
~

" 9
"
"
ESC
"" + "" :
" <
" FS """
"
" GS " - "
"
"
" >
AS
""
"
"
" US """ I " ?
)

KEY
21

D~CIMAL

>lH

""'
"
"
"
""

"
""
"
"

""
""
"
""
"
"
""
"""

'""
"

".
"
'"

"
""

'"
""
",

", w '""
""
"
" X
" Y '"m"

'""

I ,'~~

'"M

I ~~

"
"
'"
'""
"
,

j6J

ETB

C.... RACTERE]JJl OCTAL

"
'"

"
"
'"
'0"

;

""'

1'62

1"4

'"
'"
"

'00

'"'"

,"
'"

,,"

'"
'"

"
""
"
'"
'"
'"

'"'"

"
'""
",'"
'"
~
'"
'"
'"'"
'"
'". 1 '"
"," DEL ","
, '"
'

Norwegian/Danish NRC Set
(Danish and Norwegian Keyboard Selections)
COLUM"I

•

BITS

b4 ~3 b~ bl

0000

""
NUL
SOH

" DLE ..

: ~1 ""'"

"
""
~

0
1

"
m
~

.."

" ""
,,
"
,
,.
"" " STX ,, DC2 """ " "" 2 ""'"
,
ETX , ~£~ "
3
""
"" # """ 3 """
EOT : OC4 "
$
4
..
"
" ""
"" 4 ""
,
5
" • ""
" " ENQ ,, NAK ""
,
6
" " ACK ,, SYN ""
" 6 "
BEL
"
ETB
"
7 , ,
,
""
"" 7 ""
as '", CAN " (
"
6
8 ' ,
""
"
"'"
"
n
)
HT
9
EM "
"
9 ,
""
""
""
'"
, LF " sua "
10 "
* "" : ""
'"
11
" , VT ", ESC "" + "" ; "
"
"
, , FF , FS ""
12
<
""
"
"
"
,
,
CA ", GS "
13
"
"
"" - " = """
14
> ""
" SO ", AS ""
"
"
SI
I.
" US """ I """ ? ""
2

..
" ..
•
~

··

....

..
...
..
..

..
..

~
~

KEY
CI1AAACTEAEJ]33 OCTAL
27DfCI"'AL
18

Hex

.'"

'""

'"'
'",
.,

B
C

..
..

.""

"
Q

D
E

F
G
H

1
J
K

'"m

"
~

'"
'""

..
..
..'"..
.."

..
"

'""
",
N

'"" <E
'"
"
"
'" A '"""
"
"
'" ii '"
""
'""
" -

9
h
I
j

1
m

''''
'"
'"
'"
'""
'"n.
'"
'"
"."
'",.

'"
''''
'"
'"
'"
",
'"
'"
'"'
'"
'"
,oc

'"
'"

'"
"
'"
'",
'"
Z
'"
m
'"
"
• '"","
'" ,; "
'" il '",
'"
'"
'" DEL "

..
M

.. • ,'"'..
.... ''''..,

· .. •
..
.... ....... ·
...
"

'"' U '"
"
'""'" v
'" w '"
""
"
''" X '"a
'"" Y '"u
",,. Z on

•
'"..

15
Spanish NRC Set (Spanish Keyboard Selection)
COlUMN

., BITS

",.
0
1

~blb2b'

.,.

DODO

,
,
NUL ,, DLE
SOH

: ~£~ "..

~
~
~

0
1

"»

""
"
""
"
""
"

, , STX ,,, DC2 n " "" 2
n
"
""
,
" 3
3 ' , , , ETX ,, ~£~ "
""
"
4 , ,
"" 0 "
" EOT , DCO m"..
, ERQ , NAK
""m 5 "
5 ,
""
"" 6 "
6 ' , , ACK , SYN "
"
"
, , BEL ,, ETB ""
"" 7 ""
7 ,
""
"
"
(
BS " CAN "
8
"" 8 ""
" "
"
""
""
9
" , HT , EM "m ) "
""
"
"
,
LF " SUB "
10
"
* """ , "
"
YT " ESC "
11
"",. + """ ; "
"
,
,
FF
FS
12
< .,
",
"
"
, , CA ", GS "" - "
""
13
"
"
ro
"
"
"
, , , so ", AS "
10
"
"
"" > ""n
"
, , SI " US " I " ?
15
"
"
"
"
2

···
·
·
·

• ..

..
..

•

..
..

B
C
D

"
•.

.. .
~

E
F

G
H

KEY
C"""ACTEREill13 OCTAL
21

IlEC ...... L

HEX

'"
"

'"
"
'"

"
'"
,"
,"

..
....
...

'""
'"""
"
'""
"
q

....

'"
,m

...
...
.,

""
'"
"
• '"""
c '"
"
d
...'"
• '"
'"
I
'"
• '"'","
'"
h
,'"
I
'",.
j
'"

• '""

'"n.
"
• '"'"
..,
"
'"
u
'"
"
'"
'""
w '"
'"
,'"
"
Y '"
'"
'"
'"
'"
'"
'"
,,.
,
'" 11' '"
'"" ~ "
'"
'"
'"
'" DEL '"'""
'"
"
"
r

.. ,

...

. ·

....
....

,,.""
" N ""
".
i.
"
""
'" A ""
'"
'""
"" -

".
..

.., P '"

·.
.
·
• ....

""
,»

.."

'"""
"

.. Z

""
"
'"
'"

,
q

,.
fi

m
n

".,.
'M

16
Swedish NRC Set (Swedish Keyboard Selection)
0

COlUMr<

•

BITS

"'
" " NUL """ OLE "" SP "n 0
1
1
" " SOH , ~£~ " ! "
STX ,
2
, DC2 " " "" 2
,
"
"
3
ETX
3
; ~5~ "" II
"
"
EOT
S "
DC' "
•
•
"
,
• " ENO ,, NAK "" % "" •
ACK : SYN
&
6
•
,
"
BEL
ETB
"
7
7
"
n
(
BS " CAN
8
8
""
"
"'"
)
HT
9
EM "
9
""
"
"
"
IF
SUB
,
10
" * "
VT " ESC "
+
11
;
""
"
" <
12
" " FF ", FS ""
CR
" GS "" 13
=
'"
'"
SO "
>
, RS "
"
"
n
SI
I.
" US """ I ""' ?

b4bJb2bl

. ..

0 0

··
.
·

. E "'

'00

.""

"'n
""n

A
B
C

'"
"
""

0
R
S

.""
""

"
"
"
"
"
"
""
"
""
'"
"'"
"

'0;

G
H

I
J
K

l
M

•

,."'"

. v

'""
"
'""
"'
'""
"

.".

, '". ,.'"
~

'"
'00

"
'"
'"

'"'

"
""
'""

"'
""

'"
'"

h
i
j
k

"
'"

'"
"'"
''00
"'

'"
'

"
'"

".""
n

"
"

'" a '"'"
"'
'"
'" ;; '"
'"
'"
'"'"
,.'"
no ·u
'"
"
n, DEL '"
'"
K

• '""" , '"

·.
:

.
.

'"
,.

'"
"
"
X
"
" Y '""'
'" Z '"
"
""
'" A '"
"
"
'"
" ;; m"
n
A "
"
'"
U
"
""
'"
'"
"
"
"

'00

• ,.

17
Swiss NRC Set
(Swiss/French and Swiss/German Keyboard Selections)

,,'

eo.
1

""
0

7
0

ACK

SYN

BEL

ETB

VT
0

FF
CR

,.
,.

R£1

'""
"

; DC2 ""
"
; R£~ "
"
" EDT , DC. '"
,
" ENO , NAK """
STX

OLE

ETX

SOH

•

",
NUL

BITS

1>4 "3b1bl

C(JCUMN

"
~

S
%
&

"
" CAN " (
, Ell " )
"" SUB " *
ESC
" +
"" FS ""
" GS " .", RS """»
"

.
H

'"
'"
"
"
""
"
~

.""

"
""
'""
"
"
""
00

0
1
2

•
5

6
7

"
"
"
"
"
"
"""
""

.
'"

"
• ,"
, "
"
"
;
""

""
<
"
",,,
>
"
" ?
"

.
."

'00

'"
"

B
C

0
R

'""

'"
'"
on

·.
b

0
E
F
G
H

I
J
K
L

.
.'"

'"
"

'00

T
U

· .".

'""

'00
M

, '"
"
'"

..'." · '"""" '""."
'"
'"

'"
'"

",""

•

.."" • ." '""'"
'".
'".
. '""
"
'"
'"
'
" , .
'"
..." ,.'"'" • '"'"
"
"

;

'00
,~

'00

" •
'"
:
"
'"

"
'""
'"

". • ..
"

;;

.. · ..,.

'00

"
'"
,'"

'" DEL

'""

"
on

Display Controls Font
0

COLUMN
~

,..... "'
"~

BITS
~

b4b3h2b1

," ,

" ,

.'!,

'it
, 'It

: '1.
: ~
,,
,
,

,
~

"
""
,.""

.,""
~

.
00

"
"
"
"
"
00

'" ·

0
0

.
..
•

.
~

..
·
'" ·· '"
.
.
.
.
·
~

I.
I.

..
.

A
B
C

D
E
F

.
'".

'00

.,
'"
'""

p
Q

'"00

"
"'

"
S

'""
m"
""

'";:;

•

·.
b

. . ,"...."'
.. ,.'""'"' '",..
. v
"
'"
'"
" • '"
"
.
'".
. '"'".
. . '".
T

" 3
/I
" ,
~
~
"
, , , ....
$
i
,. •
,
"
,
,
,
5
5
~ , 't. "" %
",
"
"
6 ,
'k : 'i, n
," 6
"
,
7
""'
7
\ ""
't
,.w" ( ,." 8 ""
"
8 ' , , ,
:
"
9
9
' , 't " ~ "" )
"
""
"
"" ~ "" * " , "
10 ' , , ...
"
, , \ " 'i: ""
11
",." ; ""
"
12 , , , FF
< x
", 'S ""
, , , 'i. , 'j, "" - " = "
""
"
""
"
, 'b ", 'l.
> "x"
"
"
"
", Ii, "" I " ? ro"
15
"
"
"
3

•

'00

.
1
u

I
J
K

L
M
N

;

'"
'"
"
"

".
"
""
m

[

, '"
l
A

'""
"
"
'"
"

I
m

.
" -

n
0

'"
'""

""
'"
'"

"
'"

'""

, '"n

,;0

x
y

'" z
'"' {
,,
I
'"" }
,"
'00

....

"
'"

"
"
'"
'"m
'"

"
'"

.. - ,.'"

'00

'"
'" It

"
'"

~ocOOEs---f-------(~~~f~~cs)--------I

KEY

CHA~AcnflEm33 OCTAL
27

DECIMAL

HEX

19
Display Controls Font (Cont)
8

'l,

.. .

>00

"",.

'l,

., '" i
'"
'I, '"'
"." 'I, ,." •
00

"' ·39,
'"
\ '"'"
'00
'l.
II, '"'
'
"'
"0
\ ,,.
,~

·4'

. .

·c

..
·F

'"
'"
"
m
'"

LOLUMN

", h' BITS

". 0
'"
'" ±
'" ,
'"
"
'" 3
'"
".'M "4

'"
. ,,.'".. "'!. .
\.
'l.
\ '".
,..
'" "
'l:
'b '".. "0
m

"4"],,,.,, I;;;:
~

A '"co
1 '"'
, "

N '"

, "'

- - e-

;

1
" "
m
,,. A .,
'"
2
". ~ "'
"
" "
m
m
"' ~ "
£
3
A '"' 6 ,n
"'
"
"
"
"
,.."
no
A
A '" 8 ".
~
'"
'
"
.
•
"
".a "'n, 11 .,"
m
'" l '"
5
Il '"
A '"' 0 '"
'
'"
"
,,."
"
"
,.,
,
'"
.E
0
~
'l.
'" 0
° ti
"
,.,"
m
'"'" ct '"'m <E m'" • '"
7
'"
'" § '"
'" '" '""
'
'
"
no
"0
"0
'00
fJ ''"
A m 1/1 '"
8
E
'" Jl '" "• ""
'"
'"
"
,.,"
"
, m
m
'" © '"'"
9
~ ,m U '"
~
~
'"
"'
m
,
m
m
m
g
I
'"
no
'"
'"
A
10
E
".
U ""
'" ~ "
"
"
"
,.,
"
on
m
'"co 11
11
i;"
0
U '"
'" « '" »
'"
"
"
m
".
".
,,.
n.
'"
'"
12
'I,
:
1
u
ii
'"oc 'l: '""
'""
'""
,.,
"
"'
'"
'h '"
13
r '" V '"'" f mw Y '"co
' '\ '"
'"
'"
,,.'"
m
'"
'"
'"
FE
'00
:
°E
t
~ '" ...
"
"
"
" .,. "
m
m"'
'" .... '"
'" Jl m , m 0
15
'""
'""
"
"
"
m

·3 '"'

'00

.
.
.

. .
.

.. ..

. ".

.,"'
H'
,.,"'

,..

,~
,~

•

f--Ct COOES--+----(DEC SUPPL~~~~!~ GRAPHICS}------i

. ,.

20
Escape Sequences
An escape sequence begins with the CO character ESC,
followed by one or more ASCII graphic characters. For example,
ESC

is an escape sequence that changes the current line of text to
double-width characters. Escape sequences use only 7-bit
characters, and can be used in 7-bit or 8-bit environments.
Control Sequences
A control sequence begins with CSI (9/11), followed by one or
more ASCII graphic characters. CSI can also be expressed as
the 7-bit code extension ESC [. So you can express all control
sequences as escape sequences whose second character
code is [. For example, the following two sequences are
equivalent sequences that perform the same function (they
cause the display to use 132 columns per line rather than 80).
CSI
ESC

? 3

Whenever possible, use CSI instead of ESC [ to introduce a
control sequence. CSI can only be used in an 8-bit environment.
Device Control Strings
A device control string is a delimited string of characters used in
a data stream as a logical entity for control purposes. It consists
of an opening delimiter DCS, a command string (data), and a
closing delimiter ST.
DCS is an 8-bit control character that can also be expressed as
ESC P when coding for a 7-bit environment.
ST is an 8-bit control character that can also be expressed as
ESC/ when coding for a 7-bit environment.

21
TRANSMITTED CODES
Main Keypad Function Keys
Key

Code Transmitted

<Xl

DEL character

Tab

HT character

Return

CR character only or a CR character and
an LF character, depending on the
set/reset state of line feed/new line mode
(LNM).

Ctrl

Does not send a code.

Lock

Does not send a code.

Shift
(2 keys)

Does not send a code.

Space bar

SP character

Compose
Character

Does not send a code.

Editing Keys

Key

Code Generated
VT200 Mode

VT100,
VT52 Modes

Find

CSI 1

None

Insert Here

CSI 2

None

Remove

CSI 3

None

Select

CSI 4

None

Prey Screen

CSI 5

None

Next Screen

CSI 6

None

Cursor Control Keys

Key

ANSI Mode*
Cursor Key Mode
Reset
Set
Normal
Application

VT52 Mode*

Normal

Application

CSI A

SS3 A

ESC A

CSI B

SS3 B

ESC B

CSI C

SS3 C

ESC C

CSI D

SS3 D

ESC D

ANSI mode applies to VT200 and VT100 modes. VT52 mode
is an ANSI-incompatible mode.

22
Auxiliary Keypad Keys
VT100/VT200
ANSI Mode*

Key

Keypad
Numeric
Mode

VT52 Mode*

Keypad
Application
Mode

Keypad
Numeric
Mode

SS3 P

ESC? P

SS3 q

ESC? q

Keypad
Application
Mode

SS3 r

ESC? r

SS3 s

ESC? s

SS3 t

ESC? t

SS3 u

ESC? u

SS3 v

ESC? v

SS3 w

ESC?w

SS3 x

ESC? x

SS3 y

ESC? Y

-(minus)

SS3 m

,(comma)

SS31

ESC? It

. (period)

SS3 n

ESC? n

Enter CR
or
CR LF

SS3 M

ESC? m

CR
or
CR LF

ESC? M:j:

PF1

SS3 P

ESC P

PF2

SS3Q

ESCQ

PF3

SS3 R

ESC R

PF4

SS3S

SS3 S

ESCS

ESC St

ANSI mode applies to VT200 and VT100 modes. VT52 mode
is an ANSI-incompatible mode.

You cannot generate these sequences on a VT52 terminal.

:j:

Keypad numeric mode. Entergenerates the same codes as
Return. You can change the code generated by Return with
the line feed/new line mode. When reset, line feed/new line
mode causes Return to generate a single control character
(CR). When set, the mode causes Return to generate two
control characters (CR, LF).

Top Row Function Keys
Code Generated

Name on
Legend Strip

Generic VT200
Name
Mode

Hold Screen

(F1)*

VT100,
VT52
Modes

Print Screen

(F2)*

Set-Up

(F3)*

Data/Talk

(F4)*

Break

(F5)*

CSI

CSI 2 0

F10

CSI 2 1

F11 (ESC)

F11

CSI 2 3

F12 (BS)

F12

CSI2 4

F13 (LF)

F13

CSI 2 5

F14

CSI26

Help

(F15)

CSI 2 8

(F16)

CSI 2 9 -

F17

CSI 3 1

F18

CSI 3 2

F19

CSI 3 3

F20

CSI 3 4

ESC

F1 through F5 are local function keys and do not generate
codes.

Keys Used to Generate 7-Bit Control Characters
Control
Character
Mnemonic

Key Pressed
With Ctrl
(All Modes)

NUL
SOH
STX
ETX
EOT
ENO
ACK
BEL
BS
HT
LF
VT
FF
CR
SO
SI
DLE
DC1
DC2
DC3
DC4
NAK
SYN
ETB
CAN
EM
SUB
ESC
FS
GS
RS
US
DEL

2, space
A
B
C
D
E
F
G
H
I

J
K
L
M
N

Dedicated
Function Key

F12 (BS)*
Tab
F13 (LF)'

Return

0
P
Ot
R
St
T
U
V

W
X
Y
Z
3, [
4, /
5,1

F11 (ESC)*

6,7,?
8

Delete

Keys F11, F12, and F13 generate these 7 -bit control characters only when the terminal is in VT100 mode or VT52
mode.
t

These keystrokes are enabled only if XOFF support is
disabled. If XOFF support is enabled, then CTRL-S is a "hold
screen" local function and CTRL-Q is a "release screen"
local function.

25
RECEIVED CODES
Compatibility Level (DECSCL)
Sequence

Action

CSI6 1 " P

Set terminal for level 1
(VT100 mode).

CSI6 2 " P

Set terminal for level 2
(VT200 mode, 8-bit controls).

CSI6 2

o"p

Set terminal for level 2
(VT200 mode, 8-bit controls).

CSI 6 2

1 " P

Set terminal for level 2
(VT200 mode, 7-bit controls).

CSI 6 2

2 " P

Set terminal for level 2
(VT200 mode, 8-bit controls).

co (ASCII) Control Characters Recognized
Mnemonic

Name

Action

NUL

Null

Ignored when received.

ENQ

Enquiry

Generates answerback
message.

BEL

Bell

Generates bell tone if bell is
enabled.

Backspace

Moves cursor to the left one
character position: if cursor is
at left margin, no action occurs.

Horizontal
tabulation

Moves cursor to next tab stop,
or to right margin if there are
no more tab stops. Does not
cause auto wrap.

Linefeed

Causes a line feed or a new
line operation, depending on
the setting of new line mode.

Vertical
tabulation

Processed as LF.

Form feed

Processed as LF.

Carriage
return

Moves cursor to left margin on
current line.

Shift out
(lock shift
G1)

Invokes G 1 character set into
GL. G1 is designated by a
select'character-set (SCS)
sequence.

(LS1)

26
CO (ASCII) Control Characters Recognized (Cant)
Mnemonic

Name

Action

SI
(LSO)

Shift in
(lock shift
GO)

Invokes GO character set into
GL. GO is designated by a
select-character-set (SCS)
sequence.

DC1

Device
control 1

Also referred to as XON. If
XOFF support is enabled, DC1
clears DC3 (XOFF), causing
the terminal to continue sending characters (keyboard
unlocks) unless KAM mode is
cu rrently set.

DC3

Device
control 3

CAN

Cancel

Also referred to as XOFF. If
XOFF support is enabled, DC3
causes the terminal to stop
sending characters until a
DC 1 control character is
received.
If received during an escape or
control sequence, terminates
and cancels the sequence. No
error character is displayed. If·
received during a device
control string, the DCS is terminated and no errorcharacter
is displayed.

SUB

Substitute

If received during escape or
control sequence, terminates
and cancels the sequence.
Causes a reverse question
mark to be displayed. If received during a device control
sequence, the DSC is terminated and reverse question
mark is displayed.

ESC

Escape

Processed as escape sequence
introducer. Terminates any
escape, control or device
control sequence which is in
progress.

DEL

Delete

Ignored when received.
Note: May not be used as a
time fill character.

27
C1 Control Characters Recognized

Mnemonic

Equivalent
7-Bit Code
Extension

Name

Action

IND

ESC D

Index

Moves cursor down
one line in same
column. If cursor is
at bottom margin,
screen performs a
scroll up.

NEL

ESC E

Next line

Moves cursor to first
position on next line.
If cursor is at bottom
margin, screen performs a scroll up.

HTS

ESC H

Horizontal
tab set

Sets one horizontal
tab stop at the
column where the
cursor is.

ESC M

Reverse
index

Moves cursor up
one line in same
column. If cursor is
at top margin,
screen performs a
scroll down.

SS2

ESC N

Single
shift G2

Temporarily invokes
G2 character set
into GL for the next
graph ic character.
G2 is deSignated by
a select-characterset (SeS) sequence.

SS3

ESC 0

Single
shift G3

Temporarily invokes
G3 character set
into G L for the next
graphic character.
G3 is deSignated by
a select-characterset (SeS) sequence.

DeS

ESC P

Device
control
string

Processed as
opening delimiter
of a device control
string for device
control use.

28
C1 Control Characters Recognized (Cont)

Mnemonic

Equivalent
7·Bit Code
Extension

CSI

Name

Action

ESC [

Control
sequence
introducer

Processed as
control sequence
introducer.

ESC/

String
terminator

Processed as
closing delimiter of
a string opened by
DCS.

CHARACTER SET SELECTION (SCS)
Designating Hard Character Sets
Use the following list of escape sequence formats to designate
hard character sets as GO through G3.

Escape Sequence

Designate As:

ESC

(finall

ESC

(finall

ESC * (final)
ESC + (finall

G2
G3

The following is a list of available character sets and their
associated final character.

Character Sets

Final Character

ASCII

DEC supplemental
(VT200 mode only)

DEC special graphics

National replacement
character sets

NOTE
Only one national character
set is available for use at any
one time (national mode).

British

Dutch

Finnish

C or5

French

French Canadian

German

Italian

29
Character Sets

Final Character

Norwegian/Danish

Eor6

Spanish
Swedish

Z
H or7

Swiss

Examples
ASCII as GO

ESC

British as G3

ESC * A

Designating Soft (Down-Line-Loadable) Character Sets
Escape Sequence

Designate As:

ESC

Dscs

ESC

Dscs

ESC

Dscs

ESC

+ Dscs

Dscs can consist of zero, one, or two intermediate characters
and a final character.
Intermediate characters are in the range of 2/0 to 2/15; final
characters are in the range of 3/0 to 7/14. (See ASCII Code
Table for column/row notation.)

Invoking Character Sets Using Lock Shifts
Control Name

Coding

Function

LSO - lock shift GO

Invoke GO into GL
(default).

LS1 -lock shift G1

Invoke G1 into GL.

LS1R-lock shift G1,
right

ESC

Invoke G1 into GR
(VT200 mode only).

LS2 - lock shift G2

ESC n

Invoke G2 into GL
(VT200 mode only).

LS2R -lock shift G2,
right

ESC

Invoke G2 into GR
(default,VT200 mode
only).

LS3 - lock shift G3

ESC 0

Invoke G3 into GL
(VT200 mode only).

LS3R - lock shift G3,
right

ESC

Invoke G3 into GR
(VT200 mode only).

30 _____________________________________

Invoking Character Sets Using Single Shifts
Control Name

Coding

Function

SS2 - single shift G2

SS2
ESC N

Invokes G2 into GL
for the next graphic
character.

SS3 - single shift G3

SS3
ESC 0

Invokes G3 into GL
for the next graphic
character.

Select C1 Control Transmission
Control
Name
7-bit Cl
control
transmission
(S7C1T)

Sequence*

Action

ESC sp F

Converts all Cl codes
returned to the application
to their equivalent
7-bit code extensions.

NOTE
The S7C1 T sequence is ignored when the terminal is in VT100 or VT52 mode.
a-bit Cl
control
transmission
(SBC1T)

ESC sp G

* sp is a space character

Returns Cl codes to the
application without
converting them to their
equivalent 7-bit code
extensions.

Terminal Modes
Name

Mnemonic

Set Mode

Reset Mode'

Keyboard
actiont

KAM

Locked
CSI 2 h

Unlocked
CSI 2 I

Insertionreplacement

IRM

Insert
CSI 4 h

Replace
CSI4 I

Sendreceive

SRM

Off
CSI 12 h

On
CSI 12 I

Line feednew line

LNM

New line
CSI 20 h

Line feed
CSI 20 I

Cursor key

DECCKM

Application
CSI? 1 h

Cursor
CSI ? 1 I

ANSI/VT52

DECANM

N/A
CSI ? 2 I

VT52

Column

DECCOLM

132 column
CSI ? 3 h

80 column
CSI ? 3 I

Scrollingt

DECSCLM

Smooth
CSI ? 4 h

Jump
CSI ? 4

Screent

DECSCNM

Reverse
CSI ? 5 h

Normal
CSI ? 5

Auto wrap

DECAWM

On
CSI ? 7 h

Off
CSI? 7

Auto
repeatt

DECARM

On
CSI ? 8 h

Off
CSI ? 8

Print form
feed

DECPFF

On
CSI ? 18 h

Off
CSI? 18 I

Print extent

DECPEX

Full screen
CSI ? 19 h

Scrolling region
CSI? 19 I

Text cursor
enable

DECTCEM

On
CSI ? 25 h

Off
CSI? 25

Keypad

DECKPAM
DECKPNM

Application
ESC=

Numeric
ESC>

Character
set

DECNRCM

National
CSI ? 42 h

Multinational
CSI? 42 I

The last character of each s'lquence is lowercase L (6/1 2).

User preference feature

32
Cursor Positioning
Control
Character

Sequence

Action

Cursor up
(CUU)

CSI Pn A

Moves cursor up
Pn lines in the
same column.

Cursor
down
(CUD)

CSI Pn B

Moves cursor
down Pn lines in
the same column.

Cursor
forward
(CUF)

CSI Pn C

Moves cursor
right Pn columns.

Cursor
backward
(CUB)

CSI Pn D

Moves cursor left
Pn columns.

Cursor
position
(CUP)

CSI PI

Pc H Moves cursor to
line PI, column Pc.
The numbering of
the lines and columns depends on
the state (set/reset)
of origin mode
(DECOM).

Horizontal
and vertical
position
(HVP)

CSI PI

Pc f Moves cursor to
line PI, column Pc.
The numbering of
the lines and columns depends on
the state (set/reset)
of origin mode
(DECOM). Digital
recommends using
CUP instead of
HVP.

Name

Index
(IND)

IND

ESC D

Moves cursor
down one line in
the same column. If
the cursor is at the
bottom margin the
screen performs a
scroll-up.

Reverse
index (RI)

ESC M

Moves cursor up
one line in the
samecolumn.lfthe
cursor is at the top
margin the screen
performs a scrolldown.

33
Cursor Positioning (Cont)
Control
Character

Sequence

Action

NEL

ESC E

Moves the cursor
to the first position
on the next line. If
the cursor is at the
bottom margin the
screen performs a
scroll-up.

Save
cursor
(DECSC)

ESC 7

Saves the following in terminal
memory.
• cursor position
• graphic rendition
• character set
shift state
• state of wrap flag
• state of origin
mode
• state of selective
erase

Restore
cursor
(DECRC)

ESC 8

Restores the states
described for
(DECSC) above. If
none of these characteristics were
saved: the cursor
moves to home
position, origin
mode is reset, no
character attributes
are assigned, and
the default character set mapping
is established.

Name
Next line
(NEL)

Tab Stops
NOTE
These sequences are affected by the user
preference lock in set-up_

Name
Horizontal
tab set
(HTS)

Control
Character

Sequence

Action

HTS

ESC H

Sets a tab stop
at the current
column.

CSI g

Clearsa horizontal tab stop at
cursor position.

CSIO g

Clears a horizontal tab stop at
cursor position.

CSI3 g

Clears all horizontal tab stops.

Tabulation
clear
(TBC)

Select Graphic Rendition (SGR)
You can select one or more character renditions at a time using
the following format.
CSI Ps ; ... Ps m
When you use multiple parameters, they are executed in
sequence. The effects are cumulative. For example, to change
from increased intensity to blinking-underlined, you can use:
CSI 0 ; 4 ; 5 m
When you select a single parameter, no delimiter(3/11) is used.

Action

All attributes off.

Display at increased intensity.

Display underscored.

Display blinking.
Display negative (reverse) image.

2
2
2
2

Display normal intensity.

Display not underlined.

Display not blinking.

Display positive image.

35
Select Character Attributes (DECSCA)
You can select all subsequent characters to be erasable or not
erasable using the following format. (See "Erasing" section.)
NOTE
This sequence is supported only In VT200 mode.

CSI Ps " q
where:

Action

All attributes off. (Does not apply to SGR.)
Designate character as "not erasable" by
DECSEL/DECSED (attribute on).

Designate character as "erasable" by
DECSEL/DECSED (attribute off).

Line Attributes
Name

Double-height line
(DECDHL)

Sequence
Top Half

Bottom Half

ESC#3

ESC#4

The same character must be used on
both lines to form full character.lfthe
line was previously single-width,
single-height, all characters to the
right of center are lost.
Single-width line
(DECSWL)

ESC # 5

Double-width line
(DECDWL)

ESC # 6

36
Editing
Name

Sequence

Action

Insert line (Il)

CSI Pn l

Inserts Pn linesatthe cursor.

Delete line (Dl)

CSI Pn M

Deletes Pn lines starting at
the line with the cursor.

Insert
characters
(ICH)
(VT200 mode
only)

CSI Pn @

Insert Pn blank characters
at the cursor position,
with the character
attributes set to normal.

Delete
character (DCH)

CSI Pn P

Deletes Pn characters
starting with the character
at the cursor position.

Name

Sequence

Action

Erase character
(ECH)
(VT200 mode
only)

CSI Pn X

Erases characters at the
cursor position and the
next n-1 character.

Erase in line
(El)

CSI K

Erases from the cursor to
the end of the line, including the cursor position.

CSIO K

Same as above.

CSI 1 K

Erases from the beginning
of the line to the cursor,
including the cursor position.

Erasing

Erase in display
(ED)

CSI2 K

Erases the complete line.

CSI J

Erases from the cursor to
the end of the screen, including the cursor position.

CSIO J

Same as above.

CSI 1 J

Erases from the beginning
of the screen to the cursor,
including the cursor position.

CSI 2 J

Erases the complete display.

37
Erasing (Cont)
Name

Sequence

Action

Selective erase
in line
(DECSEL)
(VT200 mode
only)

CSI ? K

Erases all "erasable" characters (DECSCA) from the
cursor to the end of the line.

Selective erase
in display
(DECSED)
(VT200 mode
only)

CSI ? 0 K

Same as above.

CSI ?

Erases all "erasable" characters (DECSCA) from the
beginning of the line to and
including the cursor position.

CSI ? 2 K

Erases all "erasable" characters(DECSCA) ontheline.

CSI ? J

Erases all "erasable" characters (DECSCA) from and
including the cursor to the
end of the screen.

CSI ? o J

Same as above.

CSI ? 1 J

Erases all "erasable" characters (DECSCA) from the
beginning of the screen to
and including the cursor.

CSI ? 2 J

Erases all "erasable" characters (DECSCA) in the
entire display.

Set Top and Bottom Margins (DECSTBM)
CSIPt;Pbr
Selects top and bottom margins defining the scrolling region. pt
is the line number ofthe first line in the scrolling region. Pb is the
line number of the bottom line. If you do not select either pt or
Pb, they default to top and bottom respectively. Lines are
counted from 1.

38
Printing
Before you select a print operation, check printer status using
the print status report (DSR). (See "Reports" section.)
Name

Sequence

Action

Auto print
mode

CSI ? 5 i

Turns on auto print mode.
All following display lines
print when you move the
cursor off the line using a line
feed, form feed, vertical tab, or
auto wrap. The printed line
ends with a carriage return
and the character (LF, FF, or
VT) which moved the cursor
off the previous line. Auto
wrap lines end with a line
feed.

CSI ? 4

Turns off auto print mode.

Printer
controller

CSI5

Turns on printer controller
mode. The terminal sends
received characters to the
printer without displaying
them on the screen. All
characters and character
sequences, except NUL,
XON,XOFF,CSI5 i,andCSl4
i are sent to the printer. The
terminal does not insert or
delete spaces, or provide line
delimiters, or select the
correct printer character set.
Printer controller mode has a
higher priority than auto print
mode. It can be selected during auto print mode.
When in printer controller
mode, keyboard activity continues to be directed to the
host.

Print cursor
line

CSI 4

Turns off printer controller
mode.

CSI ?

Prints the display line containing the cursor. The cursor
position does not change.
The print-cursor-line
sequence is complete when
the line prints.

39
Printing (Cont)
Name

Sequence

Action

Print screen

CSI i

Prints the screen display (full
screen or scrolling region
depending on the print extent
DEC EXT selection). Printer
form feed mode (DECPFF)
selects either a form feed (FF)
or nothing as the print terminator. The print screen sequence is complete when the
screen prints.

CSI 0 i

Same as above.

User Defined Keys (DECUDK)
The device control string format for down-line-loading UDK
functions is:
DCS Pc; PI

Ky1 /st1 ;ky2/st2;... kyn/stn ST

where:
Pc

Meaning

None

Clear all keys before loading new values.

Load new key values, clear old only where defined.

Meaning

None

Lock the keys against future redefinition.

Lock the keys against future redefinition.
Do not lock the keys against future redefinition.

Key

Value (kyn)

Key

Value (kyn)

F6
F7
F8
F9
F10

17
18
19
20
21

F14

HELP
DO

28
29

F11
F12
F13

23
24
25

F17
F18
F19
F20

31
32
33
34

Stn is a string of hex pair!! of ASCII characters that define the
specified key.
NOTE
To access the programmed values of the keys,
you type Shift - (function key).

40
Down-line-loading Characters (DRCS)
You can down-line-load your ORCS character set using the
following DECDLD device control string format.
DCS Pfn;Pcn;Pe;Pcms;Pw;Pt I Dscs Sxbp1 ;Sxbp2;...;Sxbpn ST
Parameter descriptions are as follows.
DECDLD Parameter Characters
Parameter

Name

Description

Pfn

Font
number

o and 1.

Pcn

Starting
character
number

Selects starting character in ORCS
font buffer to be loaded.

Erase
control

o = erase all characters in this

Character

0= device default (7 X 10)
1 = (not used)
2 = 5 X 10
3 = 6 X 10
4 = 7 X 10

Matrix
size

Width
attribute

TexV
full-cell

ORCS set
1 = erase only the characters that
are being reloaded
2 = erase all characters in all ORCS
sets (this font buffer number
and other font buffer numbers)

o = device default (80 columns)
1 = 80 column
2 "" 132 column
o = device default (text)
1 = text
2 = full-cell (not used)

Dscs defines the character set name for the soft font, and is

used in the SCS (select character set) escape sequence.
Sxbp1;Sxbp2;... ;Sxbpn are sixel bit patterns (1 to 94 patterns)
for characters separated by semicolons. Each sixel bit pattern
has the form:

5... S/...S
where the first S....S represents the upper columns
(sixels) of the ORCS character, the slash advances
the sixel pattern to the lower columns of the ORCS
character, and the second 5.... S represents the lower
columns (sixels) of the ORCS.

41
Clearing a Down-Line-Loaded Character Set
You can clear a character set that you have down-line-loaded
using the following DECDLD control sequence.
DCS 1;1;2( sp@ ST
Down-line-loaded character sets are also cleared by the
following actions.
• Performing the power-up self-test.
• Using the set-up "Recall" or "Default" features.
• Using RIS or ESC c sequences.
Reports
Device Attributes (DA)
Communication

Sequence

Meaning

Host to VT220
(primary DA
request)

CSI c
or
CSI 0 c

"What is your service
class code and what
are your attributes?"

VT220 to host
(primary DA
response)

CSI ? 62; 1; 2; 6; 7; 8; 9 c "I am a service class
2 (VT200 family)
terminal (62) with 132
columns (1), printer
port (2), selective
erase (6), DRCS (7),
UDK (8). I support
7 -bit national replacement character
sets (9)."

Host to VT220
(secondary DA
request)

CSI > c
or
CSI > 0 c

"What type of terminal are you, what is
yourfirmware version,
and what hardware
options do you have
installed?"

VT220 to host
(secondary DA
response)

CSI > 1; Pv; Po c

"I am a VT220 (identification code of 1, my
firmware version is
_ _ (Pv), and I
have PO options
installed.

EXAMPLE: CSI>1;10;Oc = VT220 version 1.0, no options
NOTE
If the termilial is in VT100 mode and an ID other
than VT220 10 is selected, then the following

primary exchanges apply.

42
Communication

Sequence

Meaning

VT220 to host
(VT100 10
selected in
set-up)

ESC [ ? 1; 2 c

"I am a VT100 terminal with AVO."

VT220 to host
(VT101 10
selected in
set-up)

ESC [ ? 1; 0 c

"I am a VT101
terminal."

VT220 to host
(VT10210
selected in
set-up)

ESC [ ? 6 c

"I am a VT102
terminal."

Device Status Report (DSR)
Communication

Sequence

Meaning

Host to VT220
(request for
terminal status)

CSI 5 n

"Please report your
operating status
using a OSR control
sequence. Are you in
good operating condition or do you have
a malfunction?"

VT220 to host
(OA response)

CSI 0 n

"I have no
malfunction."

CSI 3 n

"I have a
malfunction."

Host to VT220
(request for
cursor position)

CSI6 n

"Please report your
cursor position using
a CPR (not OSR)
control sequence."

VT220 to host
(CPR response)

CSI Pv; Ph R

"My cursor is positioned at __ ~~ (Pv);
_ _ (Ph)."
Where:
Pv = vertical
position (row)
Ph = horizontal
position
(column)

43
DSR - Printer Port
Communication

Sequence

Meaning

Host to VT220
(request for
printer status)

CSI ? 15 n

"What is the printer
status?"

VT220 to host

CSI ? 13 n

"DTR has not been
asserted on the
printer port since
power up or reset- in
essence, I have no
printer."

CSI ? 10 n

"DTR is asserted on
the printer port. The
printer is ready."

CSI ? 11 n

"DTR is not currently
asserted on the
printer port. The
printer is not ready."

DSR - User Defined Keys (VT200 mode only)
Communication

Sequence

Meaning

Host to VT220
(request for
UDK status)

CSI ? 25 n

"Are User Defined
Keys locked or
unlocked?"

VT220 to host

CSI ? 20 n

"User Defined Keys
are unlocked."

CSI ? 21 n

"User Defined Keys
are locked."

DSR - Keyboard Language
Communication

Sequence

Meaning

Host to VT220
(request for
keyboard
language)

CSI ? 26 n

"What is the keyboard language?"

VT220 to host

CSI ? 27; Pn n

"My keyboard language is _ _ (Pn)."
where:
Pn Language
o Unknown'
1 North American
2 British
3 Flemish
4 French Canadian
5 Danish
6 Finnish
7 German
8 Dutch
9 Italian
10 Swiss (French)
11 Swiss (German)
12 Swedish
13 Norwegian
14 French/Belgian
15 Spanish

Sent by a terminal that for some reason cannot determine
its keyboard language. The VT220 will never send this
response.

Identification (DEClO)
ESC Z
Causes the terminal to send a primary DA response sequence.
DECID, however, is not recommended. You should use the
primary DA request for this purpose.

Terminal Reset
Name

Sequence

Action

Soft terminal
reset (DECSTR)

CSI! P

Sets terminal to
power-up default
states

Hard terminal
reset (RIS)

ESC c

Replaces all set-up
parameters with NVR
values or power-up
default values if NVR
values do not exist.

45
Tests (DECTSn
The sequence format for invoking terminal tests is as follows.
CSI 4 ; ..... ; Ps y
where:

Test

Test 1, 2,3, and 6
Power-up self-test
EIA port data loopback test
Printer port loop back test
(not used)
(not used)
EIA port modem control line loopback test
20 mA port loopback test
(not used)
Repeat other test in parameter string
(not used)

1
2
3
4

5
6

7
8
9
10 and up

NOTE
DECTST causes a communications line
disconnect.
Adjustments (DECALN)
ESC # 8

Displays screen alignment pattern (full screen of
E's).

VT52 Escape Sequences
Escape Sequence

Function

ESC A
ESC 8
ESCC
ESC D
ESC F
ESC G
ESC H
ESC I
ESCJ
ESC K
ESC Y Line Column
ESCZ
ESC =
ESC>
ESC <
ESC
ESC
ESCW
ESC X
ESC]
ESC V

Cursor up
Cursor down
Cursor right
Cursor left
Enter graphics mode
Exit graphics mode
Cursor to home
Reverse line feed
Erase to end of screen
Erase to end of line
Direct cursor address
Identify
Enter alternate keypad mode
Exit alternate keypad mode
Enter ANSI mode
Enter auto print mode
Exit auto print mode
Enter printer controller mode
Exit printer controller mode
Print screen
Print cursor line

EK-VT220-HR-CN1

VT220
Programmer Pocket Guide
Addendum for Models 0, E, and F
EK-VT220-H R-002

The information in this addendum applies only to models D.
E. and F of the VT220 video terminal. You can identify your
model by looking at the label on the rear of the terminal
(Figure 1).
All other information in the VT220 Programmer Pocket Guide
applies to VT220 models A. B. C. D. E. and F.

Figure 1 Identifying the VT220 Model

•

Norwegian/Danish NRC Set
(Danish and Norwegian Keyboard Selections,
Models D, E, and F)
Use the following table for VT220 models D. E. and F.

COLUr.4N

BITS
~

"'.

b4 ~3 b2 bl

0000

" , "
,,, DLE

NUL

""
SOH : R~l "
1 , "
, STX ,,, DC2 ""
2
""
"
,
,
,
ETX ,
3
, ~S~ ""
"
4
" " EDT :, DC4 "'"
,
,
,
ENG , NAK "
5
""
"
,
ACK , SYN "
6 , ,
""
"
BEL
ET8 "
7
;
"
"
,, CAN '""
BS "
8
" ""
""
EM "
9
"' HT
""
, LF ", SUB "
10 "
"
"
, , VT ", ESC ""
11
""
,
12
" FF ", FS ""
, , CR " GS "
13
"
"
"
, , SO " RS "»
14
"
, SI
15
" US ""
~

· .

,
~

I
""
" "
.,"

s ~"
"
""

• ""
(

"
.,""

""
)
""
* """
+ "
""

5
8
7

.."

""
"
"
""
"

.."

""
:
"""
"
;
"
<
"
"
"
""
'"
> ""
"" ? "c"
"
"

''''.,
'"
"
'"

00
00

I
J

K
L

M
N

""""
"

'""
'"""
"
'"

""
'""

"
" v '"m
'"" W "
"
'" X ''''"
'" Y '"
'"" Z '"
"'"
'" IE '"
'"
'"
"n ;. '"
"
""
" 1\ "
'"
'"
"" -

".
~

CHARACTER SET SELECTION (SCSI
Designating Hard Character Sets
Add the following entry.

Norwegian/Danish
(models D. E, and F)

'""
'""
'""

'00

'""
'"
'"
"
'"
'"
"
''""
"

Final Character
E or 6 or '

'"''''
'"
'"

".
'"

'
'"
"
'"
'"
'"n

'"
'"
''''" w
'"
"
'"'"
'",
,n
,,,,
'" • m
"
"
'"
'" • '"on"
'"
'"
'"
'"
,,,, io '""
'"
'"
"
,"
""
"
'"'" DEL mm
"
,~

I
k
1

,. . - .
..

H(X

Character Set

KEY

•

· .. •
..
... .. .. ·,
... .. • ..
.. ... .. ·
".
.. ... • . ·
.. ... .. •
~

CHAIIACTUIETI]31 OCT4l
27
DECIMAL
16

"
P

..
.. .
I

"
"""
~

'" ..

.
..""'"

Printed in U.S.A.

EK-VT220-HR-002