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1990-02-06
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VT320/VT102/VT52/Heath-19 Emulator in MS Kermit/IBM-PC 22 June 89
Code Summary
VT320/VT102 keypads Heath-19 and VT52 Keypads
IBM keys IBM Keys
+------+------+------+------+ +------+------+-------+----------+
] PF1 ] PF2 ] PF3 ] PF4 ] ] Blue ] Red ] Grey ] up arrow ] Vendor
] F1 ] F2 ] F3 ] F4 ] ] F1 ] F2 ] F3 ] up arrow ] Kermit
+------+------+------+------+ +------+------+-------+----------+
] 7 ] 8 ] 9 ] - ] ] 7 ] 8 ] 9 ]down arrow]
] F5 ] F6 ] F7 ] F8 ] ] F5 ] F6 ] F7 ]down arrow]
+------+------+------+------+ +------+------+-------+----------+
] 4 ] 5 ] 6 ] , ] ] 4 ] 5 ] 6 ] rgt arrow]
] F9 ] F10 ] SF1 ] SF2 ] ] F9 ] F10 ] SF1 ] rgt arrow]
+------+------+------+------+ +------+------+-------+----------+
] 1 ] 2 ] 3 ] E ] ] 1 ] 2 ] 3 ]left arrow]
] SF3 ] SF4 ] SF5 ] n S] ] SF3 ] SF4 ] SF5 ]left arrow]
+------+------+------+ t F] +------+------+-------+----------+
] 0------0 ] . ] e 6] ] 0------0 ] . ] Enter ]
] SF7 ] SF8 ] r ] ] SF7 ] SF8 ] SF6 ]
+-------------+------+------+ +-------------+-------+----------+
SF1 means push Shift and F1 keys simultaneously
---------------------------------------------------------------------------
Below, the acronyms CSI and SS3 stand for 8-bit control codes in an 8-bit
environment or for their 7-bit equivalents "ESC ╒" and "ESC O", respectively.
Command SET TERMINAL CONTROL {8-BIT ] 7-BIT}, and an equivalent command from
the host, determines the usage for output text; use of parity forces 7-bit
mode. CSI is decimal 155, SS3 is decimal 143. Similarly, DCS is decimal 144
or ESC P and ST is decimal 156 or ESC \.
---------------------------------------------------------------------------
Codes set by DEC and Heath arrow keys
Key Verb IBM VT320/VT102 mode VT52/H19 mode
key Cursor Application Cursor or Application
up uparr up CSI A SS3 A ESC A
down dnarr down CSI B SS3 B ESC B
right rtarr right CSI C SS3 C ESC C
left lfarr left CSI D SS3 D ESC D
Codes sent by DEC editing keys, not preassigned to keys.
Key Verb VT320 mode VT102/VT52/H19 mode
Find decFind CSI 1 ~ these keys
Insert Here decInsert CSI 2 ~ send nothing
Remove decRemove CSI 3 ~
Select decSelect CSI 4 ~
Prev Screen decPrev CSI 5 ~
Next Screen decNext CSI 6 ~ ~ is ascii chart 7/14
Codes sent by DEC Numeric Keypad
Key Verb IBM ANSI VT320/VT102 mode VT52/H19 mode
key Numeric Application Numeric Application
PF1/HF7/Blue Gold,pf1 F1 SS3 P SS3 P ESC P ESC P
PF2/HF8/Red pf2 F2 SS3 Q SS3 Q ESC Q ESC Q
PF3/HF9/Grey pf3 F3 SS3 R SS3 R ESC R ESC R
PF4/HF1 pf4 F4 SS3 S SS3 S ESC S ESC S
0 kp0 SF7 0 SS3 p 0 ESC ? p
1 kp1 SF3 1 SS3 q 1 ESC ? q
2 kp2 SF4 2 SS3 r 2 ESC ? r
3 kp3 SF5 3 SS3 s 3 ESC ? s
4 kp4 F9 4 SS3 t 4 ESC ? t
5 kp5 F10 5 SS3 u 5 ESC ? u
6 kp6 SF1 6 SS3 v 6 ESC ? v
7 kp7 F5 7 SS3 w 7 ESC ? w
8 kp8 F6 8 SS3 x 8 ESC ? x
9 kp9 F7 9 SS3 y 9 ESC ? y
comma (,) kpcoma SF2 , SS3 l , ESC ? l
minus (-) kpminus F8 - SS3 m - ESC ? m
period (.) kpdot SF8 . SS3 n . ESC ? n
Enter kpenter SF6 CR or SS3 M CR or ESC ? M
CR LF (newline on) CR LF
(SFn means hold down Shift key while pressing Function key n.)
Codes sent by DEC LK201 keyboard function keys, not preassigned to PC keys
Key name Verb VT320 mode VT102/VT52/H19 mode
Hold Screen nothing nothing
Print Screen nothing nothing
Set-Up nothing nothing
F4 nothing nothing
F5 (Break) nothing nothing
F6 decF6 CSI 17 ~ nothing
F7 decF7 CSI 18 ~ nothing
F8 defF8 CSI 19 ~ nothing
F9 defF9 CSI 20 ~ nothing
F10 defF10 CSI 21 ~ nothing
F11 (ESC) defF11 CSI 23 ~ ESC
F12 (BS) decF12 CSI 24 ~ BS
F13 (LF) decF13 CSI 25 ~ LF
F14 decF14 CSI 26 ~ nothing
Help decHelp CSI 28 ~ nothing
Do decDo CSI 29 ~ nothing
F17 defF17 CSI 31 ~ nothing
F18 decF18 CSI 32 ~ nothing
F19 defF19 CSI 33 ~ nothing
F20 decF20 CSI 34 ~ nothing
Note: F6 - F20 are DEC "User Definable Keys" which means their output can be
redefined by the host (not by the terminal owner). See below for method.
An often confusing item is knowing the mode of the auxillary keypad: numeric or
application. Digital Equipment Corporation designed the terminal to change
modes only under command from the remote computer and not at all from the
keyboard. So the startup state is numeric/cursor mode, and reception of escape
sequences "ESC ╒ ? 1 h" or "l" changes the mode. Kermit verbs for the keypad
and cursor keys generate the correct escape sequences appropriate to the cur-
rent mode and terminal type.
A best attempt is made to safely test for the 101/102 key Enhanced keyboard and
use it if present. If it is present then the keyboard translator separates the
individual arrow keys from those on the numeric keypad and also separates the
asterisk and forward slash keys on the keypad from those on the regular
typewriter keyboard. These special Enhanced keyboard keys are reported as scan
codes with 4096 added to the base scan code.
OTHER IBM KEYS OPERATIONAL IN CONNECT MODE:
IBM key IBM Verb Action
Keypad Del Send ASCII Del code (rubout) \127
Backspace (<-) Send ASCII Del code (rubout) \127 (BS is \8)
Keypad - MODELINE Toggle mode line on/off (only if Mode Line is
enabled and not used by the host).
Alt - TERMTYPE Toggle among H-19, VT52, VT100, VT320 types.
Alt = RESET Clear screen and reset terminal emulator to
starting (setup) state.
Alt B BREAK Send a BREAK signal
Alt H HELP Show drop down help menu (detailed below)
Alt S STATUS Show settings
Alt X EXIT Exit Connect mode, back to Kermit prompt
Home HOMSCN Roll screen up (text down) to beginning of
storage.
End ENDSCN Roll screen down (text up) to end of storage.
PgUp UPSCN Roll screen up (back, earlier) one screen.
PgDn DNSCN Roll screen down (forward, later) one screen.
Ctrl-PgUp UPONE Roll screen up one line.
Ctrl-PdDn DNONE Roll screen down one line.
Control PrtSc PRTSCN Toggle on/off copying of received text to
printer, "PRN" shows on far right of mode
line when activated.
Control-End DUMP Dump image of screen to a disk file or device.
Default filename is KERMIT.SCN in the current
directory. Use command SET DUMP to change the
filename. Screen images are appended to the
file, separated by formfeeds.
Shift-PrtSc Standard DOS Print-screen, dump screen image to printer.
unassigned HOLDSCRN DEC style Holdscreen, same as typing Control-S.
"Alt -" means hold down Alt and type minus on the upper key rank. This
switches among the various kinds of emulation but does not change most operat-
ing parameters of the emulator.
CONNECT ESCAPE COMMANDS:
Type the Kermit escape character (normally "^σ"), then one of the keys below:
(equivalent IBM Verb)
? display this short list. HELP
0 send a null character. NULL
B send a BREAK signal. BREAK
C close connect session & return to Kermit prompt. EXIT
F dump screen to filespec, default is KERMIT.SCN. DUMP
H hangup the phone or network connection HANGUP
L send a Long BREAK signal LBREAK
M toggle mode line on/off. MODELINE
P push to DOS. DOS
Q quit (suspend) logging. LOGOFF
R resume logging. LOGON
S show status. STATUS
Kermit escape character itself: send it to the host.
1.17.3. Responses To Characters Received By the Terminal Emulator
Spaces shown between characters of escape sequences are there for ease of read-
ing. The actual sequences contain no spaces. Unknown escape sequences are
absorbed and ignored.
DEC VT320 and VT102 functions while in ANSI (non-VT52) mode, unsupported
features are marked by an asterisk (*):
Control codes in C0 (no high bit) area
Name ASCII value
chart hex keyboard operation
NUL 0/0 00h ^@ ignored except during transparent printing
ENQ 0/5 05h ^E *Answerback message (not supported)
BEL 0/7 07h ^G Sound DEC style beep
BS 0/8 08h ^H Backspace, move cursor left one character
HT 0/9 09h ^I Horizontal tab, move cursor to next tabstop
LF 0/10 0ah ^J Linefeed, move cursor down one line
VT 0/11 0bh ^K Vertical Tab, treated as a line feed
FF 0/12 0ch ^L Formfeed, treated as a line feed
CR 0/13 0dh ^M Carriage return, move cursor to col 1
SO/LS1 0/14 0eh ^N Map character set in G1 to GL, locking shift
SI/LS0 0/15 0fh ^O Map character set in G0 to GL, locking shift
DC1 1/1 11h ^Q XON flow control, resume communication
DC3 1/3 13h ^S XOFF flow control, suspend communication
CAN 1/8 18h ^X Cancel escape & control sequence in progress
SUB 1/10 1ah ^Z Treated as a CAN
ESC 1/11 1bh ^╒ Escape, start escape seq, cancel any others
DEL 7/15 7fh ^_ ignored except during transparent printing
All others are ignored
Control codes in C1 (high bit set) area.
These are replaced by ESC <code - 40h> in a 7-bit environment, or when
Controls is set to 7-bit output.
Name ASCII value
chart 8-bit 7-bit operation
IND 8/4 84h ESC D Index, move cursor down one line, scrolls
NEL 8/5 85h ESC E Next line, like CR/LF, scrolls
HTS 8/8 88h ESC H Set Horizontal Tab at cursor's column
RI 8/13 8dh ESC M Reverse index, move cursor up one line,scrolls
SS2 8/14 8eh ESC N Map G2 to GL for next char only, single shift
SS3 8/15 8fh ESC O Map G3 to GL for next char only, single shift
DCS 9/0 90h ESC P Device Control String introducer
CSI 9/11 9bh ESC ╒ Control Sequence Introducer
ST 9/12 9ch ESC \ String Terminator
OSC 9/13 9dh ESC σ Operating System Command, consume through ST
PM 9/14 9eh ESC ^ Privacy Message, consume through ST
APC 9/15 9fh ESC _ Applications Prog Command, consume through ST
All others are ignored
Escape Seq Mnemonic Description of Action
ESC ^L Enter Tektronix sub-mode, clear Tek screen.
(This is ignored if DISABLE TEK has been given)
ESC 7 DECSC Save cursor position, attributes, contents of
char sets used as GL and GR, wrap flag,
origin mode (DECOM), SS2/SS2 shifts.
ESC 8 DECRC Restore cursor from previously saved position
and information listed for DECSC
ESC # 3 DECDHL Double height and width line, top half
ESC # 4 DECDHL Double height and width line, bottom half
ESC # 5 DECSWL Single height and width line
ESC # 6 DECDWL Double width single height line
ESC # 8 DECALN Screen alignment test, fill screen with E's
ESC ( <ident> SCS Designates 94 byte character set <ident> to G0
ESC ) <ident> SCS Designates 94 byte character set <ident> to G1
ESC * <ident> SCS Designates 94 byte character set <ident> to G2
ESC + <ident> SCS Designates 94 byte character set <ident> to G3
ESC - <ident> SCS Designates 96 byte character set <ident> to G1
ESC . <ident> SCS Designates 96 byte character set <ident> to G2
ESC / <ident> SCS Designates 96 byte character set <ident> to G3
<ident> size character set
A 94 UK-ASCII (ASCII, sharp sign 2/3 replaced by
Sterling sign), available only when a VT102
A 96 ISO Latin-1 (default in G2, G3)
B 94 ASCII (default in G0, G1)
0 94 DEC Special Graphics (line drawing)
1 94/96 Kermit, ALT-ROM
2 94 DEC Special Graphics (line drawing)
%5 94 DEC Supplemental Graphics
< 94/96 User Preferred Supplemental Set*
> 94 DEC Technical set (from VT340's)
* VT300 terminals give choice of ISO Latin-1 (96) or DEC Supplemental
Graphics (94) determined by a Setup menu selection or host command. MS Kermit
has DEC Supplemental Graphics as the startup UPSS character set.
If the size of the character set does not match the <ident> nothing happens.
Startup defaults are ASCII in G0 and G1, ISO Latin-1 in G2 and G3, GL points
to G0, GL points to G2. Activating DEC National Replacement Charactes maps
the NRC set selected by SET TERMINAL CHARACTER-SET <country> into G0..G3.
Single and Locking shifts, SS2, SS3, LS0 (SI), LS1 (SO), LS1R, LS2, LS2R,
LS3, LS3R determine which set is mapped to the GLeft or GRight area.
ESC < Exit VT52 mode (to previous ANSI kind/VT320)
ESC = DECKPAM Enter numeric keypad application mode
ESC > DECKNPNM Enter numeric keypad numeric mode
ESC D IND Index, moves cursor down one line, can scroll
ESC E NEL Move cursor to start of line below, can scroll
ESC sp F S7C1T Disable output of 8-bit controls, use 7-bit
ESC sp G S8C1T Enable output of 8-bit control codes
ESC H HTS Set one horizontal tab at current position
ESC M RI Reverse Index, cursor up one line, can scroll
ESC N SS2 Single Shift 2, map G2 to GL for next char only
ESC O SS3 Single Shift 3, map G3 to GL for next char only
ESC P DCS Start Device Control String command (see below)
ESC Z DECID Identify terminal. Responses are
VT320: CSI ? 63; 1; 2; 8; 9 c
VT102: CSI ? 6 c
VT52: ESC / Z
Heath-19: ESC / K
ESC \ ST String Terminator of Device Control Strings
ESC σ OSC Operating System Command, ignored through ST
ESC ^ PM Privacy Message, ignored through ST
ESC _ APC Applications Program Command, ignored thru ST
ESC c RIS Reset terminal to initial state, hard reset
ESC n LS2 Map character set in G2 to GL, locking shift
ESC o LS3 Map character set in G3 to GL, locking shift
ESC ] LS3R Map character set in G3 to GR, locking shift
ESC } LS2R Map character set in G2 to GR, locking shift
ESC ~ LS1R Map character set in G1 to GR, locking shift
ESC ╒ CSI Control Sequence Introducer, see list below
Control Seq Mnemonic Description of Action
CSI Pn @ ICH Insert Pn spaces at and after cursor
CSI Pn A CUU Cursor up Pn lines, does not scroll
CSI Pn B CUD Cursor down Pn lines, does not scroll
CSI Pn C CUF Cursor forward, stays on same line
CSI Pn D CUB Cursor backward, stays on same line
CSI Pn E CNL Next-line (same as cr/lf), do Pn times
CSI Pn F CPL Previous-line (reverse index), do Pn times
CSI Pc G CHA ANSI Cursor to absolute column Pc
CSI Pr; Pc H CUP Set cursor to row, column (same as HVP)
CSI Pn I CHI Cursor forward Pn tabstops (Horizontal Index)
CSI Ps J ED Erase in display:
0 = cursor to end of screen, inclusive
1 = start of screen to cursor, inclusive
2 = entire screen, reset lines to single
width, cursor does not move.
CSI ? Ps J DECSED Selective erase in display, Ps as for CSI Ps J
Not supported in MS Kermit
CSI Ps K EL Erase in line:
0 = cursor to end of line, inclusive
1 = start of line to cursor, inclusive
2 = entire line, cursor does not move
CSI ? Ps K DECSEL Selective erase in line, Ps as for CSI Ps K
Not supported in MS Kermit
CSI Pn L IL Insert Pn lines preceding current line.
CSI Pn M DL Delete Pn lines from current downward, incl.
CSI Pn P DCH Delete Pn chars from cursor to left, incl.
CSI Pn; Pn R CPR Cursor report (row, column), sent by terminal
Example: home position yields CSI 1; 1 R
CSI Pn X ECH Erase Pn chars at and to right of cursor
CSI Pn a CUF ANSI Cursor forward Pn columns
CSI Pn c DA Device Attributes request, see reports
CSI > Pn c DA Secondary Device Attributes req, see reports
CSI Pr d CVA ANSI Cursor to row Pr, absolute
CSI Pn e CUD ANSI Cursor down Pn rows
CSI Pr; Pc f HVP Set cursor to row, column (same as CUP)
CSI Ps g TBC Tabs clear, Ps: 0 = at this position, 3 = all
CSI Pn i MC Media Copy, see below
CSI Pa;...Pa h SM Set ANSI mode, see table below
CSI Pa;...Pa l SM Reset ANSI mode, see table below
Pa Mnemonic Mode Set (h) Reset (l)
2 KAM *Keyboard locked unlocked
3 CRM Control rep act upon debug display
4 IRM Insert insert replace
10 HEM Horz editing n/a always reset
12 SRM Local echo off on
20 LNM New Line cr=>cr/lf cr=>cr
CSI ? Ps;...;Ps h SM Set DEC mode, see table below
CSI ? Ps;...;Ps l RM Reset DEC mode, see table below
Ps Mnemonic Mode Set (h) Reset (l)
0 error (ignored)
1 DECCKM cursor keys application cursor/numeric
2 DECANM ANSI VT320/VT102 VT52
3 DECCOLM Columns +132 col 80 col
4 DECSCLM *Scrolling smooth jump
5 DECSCNM Screen, whole reverse video normal
6 DECOM Origin stay in margins ignore margins
7 DECAWM Autowrap on off
8 DECARM *Autorepeat on off
9 DECINLM *Interlace on off
18 DECPFF Printer term Form Feed none
19 DECPEX Printer extent screen scrolling region
25 DECTCEM Cursor visible invisible
34 n/a Invoke macro: TERMINALS TERMINALR
38 n/a Graphics (Tek) ++graphics text
42 DECNRCM Nat Repl Char enable disable
66 DECNKM Numeric keypad application numeric
68 DECKBUM *Typewriter data process typewriter
+ See comments on EGA boards.
++ Ignored if DISABLE TEK has been given.
(SET TERMINAL CHARACTER-SET <country> must be given to employ DEC
National Replacement Characters. Enabling NRCs replaces G0..G3 chars
sets with the NRC set and disables 8-bit controls; disabling only
re-enables 8-bit controls.)
CSI Pn i MC Printer controls (Media Copy)
Pn
0 Print whole Screen
4 Exit printer controller (transparent print)
5 Enter printer controller (transparent print)
CSI ? Pn i MC DEC Printer controls (Media Copy)
Pn
1 Print line containing cursor
4 Exit auto print (stop echoing to printer)
5 Enter autoprint (echo screen chars to printer)
CSI Ps;...Ps m SGR Select graphic rendition
Ps
0 all attributes off (#'s 1, 4, 5, 7)
1 bold, intensify foreground
4 underscore (reverse video on IBM CGA/EGA)
5 blink
7 reverse video, per character
22 bold off, VT320
24 underline off, VT320
25 blinking off, VT320
27 reverse video off, VT320
non-DEC extensions: 30-37 = foreground color = 30 + colors
40-47 = background color = 40 + colors
colors: 1 = red, 2 = green, 4 = blue
Transparent printing sends all output, except the CSI 4 i termination string,
to the printer and not the screen, uses an 8-bit channel if no parity so NUL
and DEL will be seen by the printer and termination recognizer code, and
all translation and character set selections are bypassed.
CSI Ps n DSR Device Status request, see reports
CSI ! p DECSTR Soft reset of terminal (keeps screen)
CSI Pa $ p DECRQM Report ANSI mode settings, see reports
CSI ? Pd $ p DECRQM Report DEC mode settings, see reports
CSI Pl; Pc " p DECSCL Set conformance level (set terminal type)
Pl Pc level selected (also does a soft reset, not hard)
61 0 VT102, 7-bit controls (61 is otherwise VT100 level)
62 0 or 2 VT320, 8-bit controls (62 is otherwise VT200 level)
62 1 VT320, 7-bit controls
63 0 or 2 VT320, 8-bit controls (63 is otherwise VT300 level)
63 1 VT320, 7-bit controls
CSI Ps;...;Ps q DECLL Load LEDs, Ps = 0 means clear LED #1-4. VT102
Ps=1,2,3,4 sets LED # 1,2,3,4 on status line.
CSI Ps " q DECSCA Select Character Protection Attribute
Ps = 0 erasable by DECSED or DECSEL, 1 not erasable by these cmds.
Requires attribute bit per display char. Not supported by MS Kermit.
CSI Pt; Pb r DECSTBM Set top and bottom scrolling margins, resp.
CSI r resets margin to full screen.
CSI Ps $ u DECRQTSR Terminal State request, see reports
CSI & u DECRQUPSS User Preferred char set request, see reports
CSI Ps $ w DECRQPSR Presentation State request, see reports
CSI sol x DECREQTPARM Request terminal parameters, see reports
CSI 2; Ps y DECST VT102 Confidence test, exits status line
CSI 4; Ps;...Ps y DECTST VT320 Confidence tests, exits status line
CSI Ps $ } DECSASD Select active status display
Ps = 0 select main display
Ps = 1 select status line
Moves cursor to selected display area. This command will be ignored
unless the status line has been enabled by CSI 2 $ ~. When the status
line has been selected cursor remains there until the main display is
reselected by CSI 0 $ }.
CSI Ps $ ~ DECSSDT Select Status Line Type
Ps meaning
0 no status line (empty)
1 indicator line (locally owned, Kermit default)
2 host-writable line
Other extensions:
CSI 25; Pc f VT320/VT102/H19 move cursor to 25th line.
CSI 25; Pc H VT320/VT102/H19 move cursor to 25th line.
Leave the same way as you went in.
(These will disable Kermit's own status line.)
ESC ^L Enter Tektronix sub-mode, clear Tek screen.
(This is ignored if DISABLE TEK has been given)
VT320 Report requests and responses
Request CSI c primary device attributes (terminal ident)
Responses
CSI ? 63; 1; 2; 8; 9 c VT320 (132 col, printer, UDK, NRC)
CSI ? 6 c VT102
ESC / Z VT52, submode of VT320/VT102
ESC / K VT52, when in Heath-19 mode
Request CSI > c secondary device attributes
Response CSI > 24; 0; 0; 0 c VT320, firmware version 0.0 (Kermit)
Request CSI 5 n operating status
Response CSI 0 n no malfunction
Request CSI 6 n cursor position report
Response CSI Pr; Pc R Pr = row, Pc = column. Origin is 1,1
Request CSI ? 15 n printer status
Response CIS ? 10 n printer ready
or CSI ? 11 n printer is not ready
Request CSI ? 25 n User Definable Key status
Response CSI ? 20 n UDKs are unlocked (21 if locked)
Request CSI ? 26 n keyboard dialect
Response CSI ? 27; Ps n in MS Kermit this is controlled by
command SET TERMINAL CHARACTER-SET <country>
Ps Country Ps Country
1 North American/ASCII 9 Italian
2 British 13 Norwegian/Danish
8 Dutch 16 Portugese
6 Finnish 15 Spanish
14 French 12 Swedish
4 French Canadian 11 Swiss (German)
7 German
Request CSI 1 $ u terminal state (wants entire machine state)
Response DCS 1 $ ST MS Kermit does not upload this state info.
Request DCS Ps $ p string ST terminal restore state (downloads state info)
Response none required, ignored by MS Kermit.
Request CSI & u request User Preferred Supplemental Set
Response DCS Ps ! u string ST
Ps is 0 for a 94 byte set, or 1 for a 96 byte set
string is the character set ident string ("A" for ISO Latin-1/96 or
"%5" for DEC Supplemental Graphics/94)
Request CSI 1 $ w cursor information report
Response DCS 1 $ u Pr; Pc; Pp; Srend; Satt; Sflag; Pgl; Pgr; Scss; Sdesig ST
where Pr is cursor row (counted from origin as 1,1)
Pc is cursor column
Pp is 1, video page, a constant for VT320s
Srend = 40h + 8 (rev video on) + 4 (blinking on)
+ 2 (underline on) + 1 (bold on)
*Satt = 40h (Selective erase, not supported in MS Kermit)
Sflag = 40h + 8 (autowrap pending) + 4 (SS3 pending)
+ 2 (SS2 pending) + 1 (Origin mode on)
Pgl = char set in GL (0 = G0, 1 = G1, 2 = G2, 3 = G3)
Pgr = char set in GR (same as for Pgl)
Scss = 40h + 8 (G3 is 96 char) + 4 (G2 is 96 char)
+ 2 (G1 is 96 char) + 1 (G0 is 96 char)
Sdesig is string of character idents for sets G0...G3, with
no separators between set idents.
If NRCs are active the set idents (all 94 byte types) are:
Britsh A Italian Y
Dutch 4 Norwegian/Danish ' (hex 60) or E or 6
Finnish 5 or C Portuguese %6
French R Spanish Z
French Canadian 9 or Q Swedish 7 or H
German K Swiss =
(MS Kermit uses the first choice when there are multiple)
Request CSI 2 $ w tab stop report
Response DCS 2 $ u Pc;Pc;...Pc ST
Pc are column numbers (from 1) where tab stops occur. Note the
separator "/" occurs in a real VT320 but should have been ";".
Request DSC Ps $ t string ST restore presentation state
Ps is 1 for cursor information, in form of DCS 1 $ w report above
2 for tab stop information, in form of DCS 2 $ w report above
Response none, commands are executed to restore the indicated information;
an error may leave the emulator in an inconsistent state.
Request CSI Pa $ p ask state of ANSI mode controls
Response CSI Pa; Ps $ y
where Pa is the single ANSI mode below
Pa Mnemonic meaning Ps state
2 KAM keyboard action (if locked) 0 unknown mode
3 CRM control representation (no debug) 1 set
4 IRM insert/replace mode (if insert mode) 2 reset
10 HEM horizontal editing (perm reset) 3 permanently set
12 SRM send/receive (local echo on) 4 permanently reset
20 LNM newline (if newline on)
Request CSI ? Pd $ p state of DEC modes
Response CSI Pd; Ps $ y
where Pd is a single DEC state below and Ps is a state value as above
Pd Mnemonic meaning
1 DECCKM cursor key mode (vs application mode)
2 DECANM ANSI mode (vs VT52 submode)
3 DECCOLM column (if 132 columns)
4 DECSCLM if scrolling is smooth (vs jump)
5 DECSCNM screen (if video is reversed)
6 DECOM origin mode (if on)
7 DECAWM autowrap (if on)
8 DECSRM autorepeat keyboard (always on in Kermit)
18 DECPFF print with Form Feed
19 DECPEX print extent
25 DECTCEM text cursor enabled
42 DECNRCM DEC National Replacement Char set, if in use
66 DECNKM numeric keypad (vs applications mode)
67 DECBKM if backarrow sends BS or DEL (say DEL)
68 DECBUM keyboard usage (say typewriter)
Request DCS $ q string ST control function setting
Response DCS Ps $ r string ST
Ps is 0 for valid request, 1 for invalid request
Request string is one or two characters below saying which control
function is to be reported:
$} select active status display
"q set character attribute
"p set conformance level
$~ set status line type
r set top and bottom margins
m set graphic rendition
The reponse string is the same as an incoming command which would
do that function except the leading CSI is omitted. The host is
obtaining a text string to be repeated back later with a CSI prefix
to restore the current state of the selected function. Example:
request DCS $ q r ST what are top/bottom margin settings?
response DCS 0 $ r 1; 24 r ST which matches command CSI 1; 24 r
^-----^ ^-----^
Request CSI & u what is the User Preferred Supplemental Set
Response DCS Ps ! u string ST
where Ps is 0 for 94 byte character set, 1 for 96 byte set
string is the letter code for the character set, either
"A" (96) for ISO Latin-1 or "%5" (94) for DEC Suppl Graphics.
Request DCS Ps ! u string ST assign User Preferred Supplemnental Set
Ps and string are the same as for the CSI & u request above.
Request DCS Pc; Pl ] Ky1/St1...Kyn/Stn ST set User Definable Keys
Pc = 0 clear all UDK definitions before starting, = 1 clear one key.
Pl = 0 lock the keys, = 1 do not lock; MS Kermit never locks keys.
Kyn/Stn are key identifier and definition string. Form of Kyn is
two ascii digits, 17-34, representing the DEC key number for DEC F6
through DEC F20; F6 = 17, etc as per keyboard table well above.
Stn is definition text written as a pair of hex characters per final
definition byte; upper or lower case A..F are the same. Example:
DCS 1; Pl ] 28/48656c70 ST defines DEC key Help (verb decHelp)
as the four characters "Help" and does not erase all UDK definitions.
The lock indicator, Pl, is ignored by MS Kermit. 60 hex chars max.
Response none
Request CSI sol x DECREQTPARM Request terminal parameters, VT102 only
Response CSI sol; par; nbits; xspeed; rspeed; clkmul; flags x
DECREPTPARM Report of terminal parameters
sol
0 terminal can send unsolicited reports, supported as sol = 1
1 terminal reports only on request
2 this is a report (DECREPTPARM)
3 terminal reporting only on request
par = 1 none, 2 space, 3 mark, 4 odd, 5 even
nbits = 1 (8 bits/char), 2 (7 bits/char)
xspeed, rspeed = transmit and receive speed index:
0,8,16,24,32,40,48,56,64,72,80,88,96,104,112,120,128 correspond to speeds of
50,75,110,134.5,150,200,300,600,1200,1800,2000,2400,3600,4800,9600,19200,
and 38400 baud or above.
clkmul = 1 (clock rate multiplier is 16)
flags = 0-15 (Setup Block #5), always 0 here
Request DCS Ps; ...Ps { string ST download or clear soft characters
Response none not supported in MS Kermit VT320 emulator
1.17.4. DEC VT52 Mode Functions
Escape sequence Description of action
ESC 7 Save cursor position
ESC 8 Restore cursor position
ESC A Cursor up
ESC B Cursor down
ESC C Cursor right
ESC D Cursor left
ESC F Enter graphics mode
ESC G Exit graphics mode
ESC H Cursor home
ESC I Reverse line feed
ESC J Erase to end of screen
ESC K Erase to end of line
ESC V Print cursor line
ESC X Exit Printer Controller (transparent print)
ESC Y row column Direct cursor address, offset from space
ESC W Enter Printer Controller (transparent print)
ESC Z Identify (response is ESC / Z)
ESC ^ (caret) Enter autoprint mode (printer echoes screen)
ESC _ (underscore) Exit autoprint mode
ESC σ Print Screen
ESC = Enter alternate keypad mode
ESC > Exit alternate keypad mode
ESC < Enter ANSI mode (changes to VT320 or VT102)
1.17.5. Heath-19 Functions While in Non-ANSI Mode
Escape seq Mnemonic Description of action
ESC A HCUU Cursor Up
ESC B HCUD Cursor Down
ESC C HCUF Cursor Forward, stays on same line
ESC D HCUB Cursor Backward, stays on same line
ESC E HCD Clear display
ESC F HEGM Enter Graphics mode
ESC G HXGM Exit Graphic mode
ESC H HCUH Cursor Home
ESC I HRI Reverse Index
ESC J HEOP Erase to end of page
ESC K HEOL Erase to end of line
ESC L HIL Insert line
ESC M HDL Delete line
ESC N HDCH Delete character
ESC O HERM Exit Insert Char mode
ESC Y row col HDCA Direct cursor addressing, offset from space
ESC Z HID Identify (response is ESC / K which is a VT52)
ESC b HBD Erase Beginning of display
ESC j HSCP Save cursor position
ESC k HRCP Set cursor to saved position
ESC l HEL Erase entire line
ESC n HCPR Cursor Position Report request
ESC o HEBL Erase beginning of line
ESC p HERV Enter Reverse Video mode
ESC q HXRV Exit Reverse Video mode
ESC r Bn HMBR *Modify baud rate - not supported
ESC t HEKS *Enter Keypad shifted mode, not supported
ESC u HXKS *Exit Keypad shifted mode, not supported
ESC v HEWA Wrap around at end of line
ESC w HXWA Discard at end of line
ESC x Ps HSM Set Mode. See table below
ESC y Ps HRM Reset Mode. See table below
Ps Mnemonic Mode Set (x) Reset (y)
1 HSM/HRM 25th line enabled +disabled
2 *keyclick off on
3 *holdscreen enabled disabled
4 cursor type block underline
5 cursor on/off on off
6 *keypad-shifted shifted unshifted
7 alt app keypad enabled disabled
8 linefeed lf=>cr/lf lf=>lf
9 newline mode cr=>cr/lf cr=>cr
+ disabling the 25th line also clears it
ESC z HRAM Reset to power-up configuration
ESC = HAKM Enter Alternate Keypad mode
ESC > HXAM Exit Alternate Keypad mode
ESC < HEAM Enter ANSI mode (ESC ╒ stuff)
ESC @ HEIM Enter Insert Character mode
ESC ╒ HEHS *Enter Hold Screen mode, not supported
ESC \ HXHS *Exit Hold Screen mode, not supported
ESC { and } HEK, HDK *Keyboard enable/disable, not supported
ESC σ HX25 *Transmit 25th line, not supported
ESC # HXMP *Transmit page, not supported
1.17.6. Heath-19 Functions While in ANSI Mode
Escape Seq Mnenonic Description of Action
ESC ╒ Pn A CUP Cursor up Pn lines
ESC ╒ Pn B CUD Cursor down Pn lines
ESC ╒ Pn C CUF Cursor forward Pn columns
ESC ╒ Pn D CUB Cursor backward Pn columns
ESC ╒ Pr; Pc H CUP Cursor to absolute row, column
ESC ╒ Ps J ED Erase in Display, see DEC description
ESC ╒ Ps K EL Erase in Line, see DEC description
ESC ╒ Pn L IL Insert Pn lines at and below current line
ESC ╒ Pn M DL Delete Pn lines at and below current line
ESC ╒ Pn P DCH Delete Pn chars at and to right of cursor
ESC ╒ Pr; Pc f HVP Cursor to absolute row, column
ESC ╒ Ps h SM Set mode, see ESC x table above
ESC ╒ Ps l RM Reset mode, see ESC y table above
ESC ╒ Ps m SGR Set graphics rendition
Ps operation
0 exit reverse video, per character
7 enter reverse video, per character
10 enter special graphics mode
11 exit special graphics mode
ESC ╒ 6 n CPR Cursor report request: returns ESC ╒ Pr; Pc R
ESC ╒ p PXMT *Transmit page, not supported
ESC ╒ q PX25 *Transmit 25th line, not supported
ESC ╒ Ps r PMBR *Modify baud rate, not supported
ESC ╒ s PSCP Save cursor position & attributes
ESC ╒ u PRCP Restore cursor position & attributes
ESC ╒ z PRAM Reset to power-up configuration
ESC ╒ ? 2 h PEHM Revert to normal Heath-19 non-ANSI mode
ESC ╒ > Ps h SM Same as ESC x Ps
ESC ╒ > Ps l RM Same as ESC y Ps
Differences between a real VT320 and the emulator
The emulator is extended by supporting several ANSI class control sequences:
CSI Pn E CNL Next-Line, Pn times
CSI Pc G CHA Cursor to column Pc, absolute
CSI Pn I CHI Cursor forward Pn tab stops
CSI Pn a CUF Cursor forward Pn columns
CSI Pr d CVA Cursor to row Pr, absolute
CSI Pn e CUD Cursor down Pn rows
The cursor can be placed on the status line by direct addressing such as
CSI Pr; Pc H or CSI Pr; Pc f. Doing so does not invoke VT320 display area
characteristics found with the formal VT320 method of CSI Ps $ }.
Selective erasure character attribute is not supported.
Sixel, soft characters, are not supported in text mode.
Full system report and download, CSI 1 $ u and DCS 1 $ string ST, are
not supported.
User Definable Keys are not lockable.
The keyboard is not lockable.
Smooth scrolling is not supported.
Double wide and/or double high characters are supported as space fillers
and/or a repeated line.
User Preferred Supplementary (character) Set, UPSS, is not selectable in
the MS Kermit Set Term setup command repertory. Since the character sets
under UPSS are ISO Latin-1 (96) and DEC Special Graphics (94) the host must
first find which set is present so that it can be designated with the
proper set size attribute. The host can also specify which set is under UPSS.
All told, the user level Setup is not needed.
The DEC Technical character set occurs on VT340's but not on real VT320's.
When National Replacement Characters are selected from the DEC keyboard
Setup menu and are activated by CSI ? 42 h outgoing keystrokes are mapped
as well as incoming characters; the emulator acts on only incoming chars.
Real VT300 terminals operate with 80x24 or 132x24 screen dimensions; the
emulator supports whatever dimensions the user has constructed outside of
MS Kermit. Also real VT300's have no screen rollback capability.
Character sets:
VT320 Character set storage areas
G0 G1, G2, and G3
Any 94 char set Any 94 or 96 char set
ASCII ("B"/94) default G1 default is ASCII ("B"/94),
G2 and G3 defaults are
ISO Latin-1 ("A"/96)
Special Graphics ("0"/94, "2"/94)
Alt-Rom ("1"/94) (MS Kermit only)
Supplementary Graphics ("%5"/94)
Technical (">"/94) (from VT340)
User Preferred, UPSS, if Suppl Gr. UPSS if ISO Latin-1 or Suppl Gr.
National Replacement Characters are forced into all sets when activated
by CSI ? 42 h but only if a <country> has been previously selected by
SET TERMINAL CHARACTER-SET <country>
VT102 Character set storage areas
G0 and G1 G2 and G3
ASCII ("B"/94) Default ASCII ("B"/94) Default
Special Graphics ("0"/94, "2"/94)
Alt-Rom ("1"/94) (MS Kermit only)
Supplementary Graphics ("%5"/94)
Technical (">"/94) (from VT340)
National Replacement Characters Always ASCII ("B"/94)
are selected and activated by
SET TERMINAL CHARACTER-SET <country>
and affect only G0 and G1.
Note: there are several variations of DEC VT10x; the emulator comes closest
to the VT102 as rendered in the DEC Rainbow computer. A real VT320 in VT100
mode removes access to G2 and G3; the VT102 has G2 and G3 holding ASCII.σ
VT52 is used as a sub mode of a VT320 (default) or a VT102.
Only GL = G0 with ASCII is available. ESC F loads line drawing graphics,
ESC G reloads ASCII.
Heath-19. Same as for VT52 in non-ANSI mode, but while in ANSI mode
ESC ╒ 10 m and ESC ╒ 11 m duplicate the ESC F and ESC G operations.
