VISUAL 200 User manual

r
Visual Technology Incorporated
VlSUAL200
VIDEO DISPLAY TERMINAL
REFERENCE MANUAL
Railroad Avenue, Dund ee Park, Andover, MA 01810, Tel ep hone (61 7) 475-8056 Printed in U.
S.A.

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
VISUAL 200
VIDEO DISPLAY TERMI.NAL
REFERENCE MANUAL
March, 1980

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
SAFETY WARNING
Hazardous voltages 115, 220 VAC and 15 KV DC are present when the
terminal is on, and may remain after power is removed. Use caution when
working on internal circuits, and do
not work alone.
When handling the cathode ray tube caution is required as the internal
phosphor is toxic. Safety goggles and gloves must be used whenever the
CRT tube is handled. Should the tube break, skin or eyes exposed to the
phosphor, rinse the affected
area with cold water and consult a physician.
This terminal
is supplied with acord set which includes asafety ground.
Do
not use this terminal with an ungrounded outlet, missing ground pin,
or use any adaptor which will defeat the safety ground.
Insure that power is turned off before connecting or disconnecting the
keyboard cable.
This manual is published and distributed by Visual Technology Inc. Every
effort has been exercised to insure its accuracy and completeness. The
contents
are subject to change without notice and this manual may not
reflect the latest changes. Consu It the sales department for latest changes.
ii

VISUAL TECHNOLOGY INCORPORATED. RAILROAD AVENUE. DUNDEE PARK. ANDOVER. MA 01810
TASLE OF CONTENTS
Page
1. INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 SET-UP AND CONNECTIONS .................................. 3
2.1.1 Interface Connections ................................. 3
2.1.2 Power Cords. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.3 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 TURN-ON
AND WARM UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2.1 Power Turn-On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2.2
Warm Up ........................................... 3
3. KEYBOARD
AND CONTROLS ....................................... 5
3.1 REARPANELSWITCHES ..................................... 5
3.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1.2
Rear Panel Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1.2.1
Baud Rate .......................................... 5
3.1.2.2
Parity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1.2.3 Emulation Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1.2.4 Video Mode
........................... '.' . . . . . . . . . . . . 6
3.1.2.5
Refresh Rate ........................................ 6
• 3.1.2.6 Half/Full Duplex
..................................... 6
3.1.2.7 Half Duplex Mode
.................................... 6
3.1.2.8
Scroll/Page.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.2.9
Auto LF/CR -ADM 3A+ Space Over Data. . . . . . . . . . . . . . . . . 7
3.1.2.10
Auto New Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.2.11 Data Terminal
Ready. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 SLIDE CONTROLS
................ , ................... , .... " 8
3.2.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3
KEYBOARDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4
EXTERNAL VIDEO .......................................... 9
4. OPERATION
............................. , .. , ..... , .............. , 13
4.1 GENERAL ................................................. , 13
4.2 CURSOR COMMANDS
....................................... , 13
4.3
TAB COMMANDS ............................ , . . . .. . . . . . . . . . .. 14
4.4 CLEAR COMMANDS
......................................... 14
4.5 ERASE COMMANDS
................................ , .... '" " 15
4.6 FORMAT
COMMANDS. . . . . . . . . . . . .. . . . . . . .. . . .. . . . .. . .. . . . . .. 15
4.7 EDIT COMMANDS
........................................... 16
4.8 KEYBOARD COMMANDS
..................................... 16
4.9 GRAPHICS COMMANDS
...................................... 17
4.10 PRINTER COMMANDS ..... ' ......................... " ... , .... 17
4.11 READ COMMANDS
.......................................... 18
iii

VISUAL TECHNOLOGY INCORPORATED. RAILROAD AVENUE. DUNDEE PARK. ANDOVER. MA 01810
TABLE OF CONTENTS -Continued
Page
4.12 BLOCK MODE .. , ............. , ..... , ...... " ....... '" .. , " 18
4.12.1
General ............ " ............. , ....... " ...... , 18
4.12.2 Data Transmission
.................................. 20
4.12.2.1 Protect/Unprotect Mode ............................. 21
4.12.2.2 Data Compression .................................. 23
4.12.2.3 Line Mode Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.12.2.4
Pagl:! Mode Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.12.2.5 Batch Mode Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.12.3 Block Mode Commands ... . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.12.3.1 Set Block Mode Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.12.3.2
Reset Block Mode Command . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.12.3.3 Lock Block Key Command
........................... 25
4.12.3.4 Unlock Block Key Command. . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.12.3.5 Set Line Mode Command
..................... ; . . . . . . . 25
4.12.3.6 Set
Page Mode Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.12.3.7 Set Batch Mode Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.12.3.8 Set Protect Command
............................... 26
4.12.3.9 Set Unprotect Command
.......•.......•........ . . . . . 26
4.12.3.10 Set Auto-Tab Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.12.3.11 Reset Auto-Tab Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.12.3.12 Set Field Separator Command
......................... 27
4.12.3.13 Set Start of Message Code ............................ 27
4.12.3.14 Set First End
of Line Code .... , ......... ' ............ " 27
4.12.3.15 Set Second End
of Line Code. . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.12.3.16 Set First End
of Message Code. . . . . . . . . . . . . . . . . . . . . . . . . 28
4.12.3.17 Set Second End
of Message Code . . . . . . . . . . . . . . . . . . . . . . . 28
4.12.3.18 Remote Transmit Command
.......................... 28
4.12.4 Interrupted Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.12.5 Tab
Stops. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 29
4.12.6 Parity Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.12.7 Programmable Function Keys
......................... 29
4.12.7.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.12.7.2 Programmable Function Key Commands
...... " .... . . . . . 30
5. INTERFACES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. • . . . . . . . . .. . . . . . . . . 33
5.1 CODE.......................................... ........... 33
5.2 ASYNCHRONOUS
DATA. . . . . . . . . . . . . . .. . . . . . . . . . . . .. . . . . . . . . 33
iv

V'ISUAL TECHNOLOGY INCORPORATED. RAILROAD AVENUE. DUNDEE PARK. ANDOVER. MA 01810
TABLE OF CONTENTS -Continued
Page
5.3 FULL/HALF DUPLEX ........................................ 33
5.3.1 Full Duplex ......................................... 33
5.3.2 Half Duplex
........................................ , 33
5.4 COMMUNICATION INTERFACE
........ " . . .. . . .. . . .. . . . . . . .... 34
5.4.1 Current Loop Interface ................................ 34
5.4.2 Printer Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 35
5.5 COMMUNICATIONS INTERFACE JUMPERS
..................... , 36
5.5.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 36
5.5.2 Jumper Functions
.................................... 36
6. SPECIFICATIONS ........ , .................... , .. . . . . .. . . .. .. . ... .. 37
7. FIRST LEVEL MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 39
7.1 GENERAL ........................... , .... , ...... , . . . .. . . . .. 39
7.2 REAR PANEL
.............................................. , 39
7.2.1
Rear Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 39
7.2.2
Rear Panel Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 39
7.3 TOP COVER
................................................ 40
7.3.1 Top Cover Removal ............. . . . . .. . . . . . . . . . . . . . . .. 40
7.3.2 Top Cover Installation ................................. 40
7.4 PRINTED CIRCUIT BOARD REMOVAL AND INSTALLATION ....... 40
7.5 TV MONITOR PCB REMOVAL AND INSTALLATION .............. , 41
7.6 CRT AND FLYBACK REMOVAL AND INSTALLATION. .. . . .. . .. . .. 41
7.7 TV MONITOR ADJUSTMENTS ............... , .. , . . . . .. .. . . .. .. 41
7.8 110/220 VOLT SELECTION .................................... 43
7.9
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 44
7.9.1 Self Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 44
7.9.2 Fault Isolation
....................................... 44
8. INITIAL SETTINGS. . . . . . . . .. . . . . .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 47
8.1 INITIAL SETTINGS. . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . .. 47
8.1.1 Visual 200
(VT -52+) Mode ............................ , 47
8.1.2 ADDS 520+ Mode
.................................... 47
8.1.3 Hazeltine 1500+
Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 47
8.1.4
ADM-3A+ Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 48
APPENDIX I - VISUAL 200 REMOTE COMMANDS ........................... 49
APPENDIX II -ASCII CODE CHART. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 51
APPENDIX 111- CURSOR ADDRESS VALUES VISUAL 200 (VT 52+),
ADM
3A+ MODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 53
v

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
TABLE OF CONTENTS -Continued
Page
APPENDIX IV -CURSOR ADDRESS VALUES ADDS 520+ MODE ............... 57
APPENDIX V - CURSOR ADDRESS VALUES HZ 1500+ MODE.......... ........ 61
APPENDIX VI ........ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 3-1
Figure 3-2
Figure 3-3
Figure 34
Figure 4-1
Figure 4-2
Figure 4-3
Figure 5-1
Figure 5-2
Figure 5-3
Figure 54
Figure 7-1
Figure 7-2
Figure 7-3
Figure 74
LIST OF FIGURES
Rear Panel Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Keyboards ................................................. 10
Keyboard Transmitted Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
By Emulation and Alternate Keypad Mode. . . . . . . . . . . .. . . . . . . . . . . . 12
Format and Values
of Character Messages ......................... 19
Block Mode Initialize Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
Transmit Page Example ....................................... 22
Pin Connection Definitions .................................... 34
Current Loop Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Visual 200 Printer Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Interface Jumpers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Rear Panel Screw Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Top Cover Removal .......................................... 40
Location of TV Monitor Adjustments ............................ 42
110/220 Volt Selection ....................................... 43
vi

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
1. INTRODUCTION
The Visual 200 Video Display Terminal is aself contained, microprocessor based terminal offering
reliable, quiet, and economical performance. The Visual 200 contains many standard features
which normally
are offered as extra cost options. These include 7 X 9 dot matrix, Background/
Foregrou,nd, Line and Character Editing, Tabbing, Line Drawing, Cursor Addressing
and Switchable
Emulations. Beside the Visual 200
functionality; emulations of the DEC VT52, ADDS 520, LSI
ADM 3A, and Hazeltine 1500* are incorporated in the terminal. Domestic and European power
configurations
are also provided.
This manual describes the features and operation
of the Visual 200. Programming and application
information together with first level service information is also included.
*DEC VT52 is a trademark of Digital Equipment Corp.
ADDS
520 is a trademark of Applied Digital Data Systems.
ADM
3A is a trademark of Lear Siegler Corp.
Hazeltine
1500 is a trademark of Hazeltine Corp.

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
2. INSTALLATION
2.1 SET-UP AND CONNECTIONS
Following unpacking, place the terminal so that air will freely circulate under the unit, on
the rear surface, and at the
top rear of the cover. Route the keyboard cable under the
terminal and plug the connector into its receptacle on the back of the terminal using the
locking screws provided.
2.1.1 Interface Connections
Two 25 pin female "0" connectors are provided on the rear of the terminal labeled "AUX
PO RT" and "E IA". The "E IA" connector provides interfacing via RS 232C or 20 mao
Current Loop for connection to the computer or modem. The "AUX PORT" connector
provides
RS 232 interfacing for a serial printer. Section 5 contains detailed interface
information including pin assignments.
2.1.2 Power Cords
The
VISUAL 200 is provided with a three wire power cord with a U.S. or European stan-
dard plug.
Each plug includes a ground pin. Do not use this terminal on an ungrounded
receptacle
or use any adaptor which will disconnect th is ground.
2.1.3 Cleaning
Dirt and smudges can be removed from the terminal with common household spray cleaners
and a soft cloth. Unplug the power cord before cleaning and do not allow the cleaning
solution to enter any of the cabinet openings.
2.2
TURN-ON AND WARM UP
Sufficient time should be allowed for the terminal to reach room temperature before power-
ing on.
Typically, one hour is required when the terminal has been moved from a substan-
tially colder environment.
2.2.1 Power Turn-On
The power switch is located on the right front of the terminal. When turned on, both the
"CAPS ON L Y" and "ON" keys are illuminated. An internal self-test performs a program
memory check sum and data memory test. Successful completion of the self-test is indi-
cated
by extinguishing of the "CAPS ONLY" light and the display of the cursor. If neither
light is illuminated and a cursor does not appear press the red reset button located on the
right front underside of the terminal.
2.2.2 Warm Up
Approximately 30 seconds after power on, the display will be visible with the cursor block
located
at the home position. Should the cursor not appear, or the "CAPS ON L Y" and
"ON" keys not be illuminated, turn the power switch off and reset the circuit breaker.
The
circuit breaker is the red button located on the bottom of the terminal adjacent to the
power switch. Whenever the power switch
is cycled, allow 30 seconds in the off position to
insure proper resetting.
3

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
3. KEYBOARD AND CONTROLS
3.1 REAR PANEL SWITCHES
3.1.1 General
Two banks of eight switches used for selecting the operating characteristics of the VISUAL
200 are located on the rear of the terminal. These switches are identified by a label shown
in Figure 3-1. Whenever these switches
are changed, the operator must either type the
"CONVERT FUNCTION" and the "RST" keys simultaneously or cycle the power switch.
3.1.2 Rear Panel Switches
Figure
3-1 Rear Panel Switches
3.1.2.1 Baud Rate
Three switches (6, 7, 8
right bank) select the data rate used for transmit data, receive data
and
printer data. Eight speeds are provided ranging from 110 to 19,200 baud. These
switches automatically determine the number
of bits transmitted (11 bits at 110 baud and
10 bits at all other speeds).
3.1.2.2 Parity
Two switches (4, 5 right bank) select parity for both the data and printer interfaces, and
determine the checking operation
for receive data.
ODD position: Transmitted parity bit is set so that there is an odd number of ones in each
character. Receive data is checked for an odd number of ones in each character. If the
received character
has incorrect parity, a parity error symbol (p E) is displayed in place of
the character received.
5

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
EVEN position: In like manner, the parity bit is set so that each transmitted character has
an even number of ones. Received character parity is checked and the received character is
displayed or in the event of incorrect parity the parity error symbol is displayed.
SPACE position: Transmitted characters have the parity set to a zero(space) in this position.
Received
parity is not checked.
MARK position: In a similar manner, transmitted characters have the parity bit set to a
one (mark). Received
parity is not checked.
3.1.2.3 Emulation Mode
Two switches (2, 3 right bank) select the emulation mode. VISUAL 200 (VT -52+), ADDS
520+, Hazeltine 1500+, and ADM -3A+ are all present in the standard termina I. See Section
4
for operation and functionality in each of these emulation modes.
3.1.2.4
Video Mode
One switch (1 right bank) selects the video presentation, black characters on a wh ite back-
ground,
or white characters on a black background.
3.1.2.5 Refresh Rate
One switch (8 left bank) selects either 50 or 60 Hz. refresh rate. This switch does not select
the voltage
input of 110 or 220 volts! When this switch is altered power must be cycled
off then on before the switch position is recognized. See Section 7 for input voltage change
instructions.
3.1.2.6
Half/Full Duplex
One switch (7
left bank) selects Full or Half duplex operation.
Full Duplex position: Request-to-Send
is always true while the terminal is on line, and
transmitted data
is totally independent of received data (the computer must echo the
data back in order
for it to appear on the screen).
Half Duplex position: Transmitted data is internally echoed to the received data. Request-
to-Send
is set true when a key is typed on the keyboard, and remains true until reset by the
RST (reset) key,
the terminal is switched off line, or by the typing of the terminating code
(see paragraph 3.1.2.7). RTS can also be set remotely as described in paragraph 3.1.2.7.
3.1.2.7
Half Duplex Mode
Two switches (5,6 left bank) determine the code which will set and reset RTS depending
on the emulation mode.
• When the terminal is set to FDX and V200 Rei 0.11 or V210 Rei 0.03 or later firm-
ware is installed and the PCB is revision E or later, a local hardware echo is provided
when
the HDX switches are set to the CR position. If local echo is not desired in
FDX, the HDX switches must be set to the Secondary Channel position (OFF).
• Visual
200 mode, CR
Typing any key sets RTS. Typing CR resets RTS. Receiving a CR from the com-
puter sets RTS.
6

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
• Visual 200 mode, EOT
Typing any key sets RTS. Typing CR resets RTS. Receiving an EOT from the com-
puter
sets RTS.
• Visual 200 mode, ETX
Typing any key sets RTS. Typing CR resets RTS. Receiving an ETX from the com-
puter
sets RTS.
• AD DS 520+ mode, CR
Typing any key
sets RTS. If Auto LF =1 CR resets RTS. If Auto LF =0 typing LF
if preceded by CR resets RTS. No remote character sets RTS.
• ADDS 520+ mode, EOT
Invalid position.
• ADDS 520+ mode, ETX
Typing any key sets RTS. Typing ETX resets RTS. No remote character sets RTS.
• Hazeltine 1500+ mode CR, EOT, ETX
In any of the above modes any key typed sets RTS. Typing CR, EOT, or ETX resets
RTS. No remote character sets RTS.
• ADM-3A+ mode, CR
Invalid position.
• ADM-3A+ mode, EOT
Typing any key sets RTS. Typing EOT resets RTS. No remote character sets RTS.
• ADM-3A+ mode, ETX
Typing any key sets RTS. Typing ETX resets RTS. No remote character sets RTS.
3.1.2.8 Scroll/Page
One switch (4 left bank) determines if the terminal will be in the Scroll or Page mode.
Scroll Mode: When data entering the bottom line is finished (line feed or entering the 80th
character with Auto New Line enabled) the screen is scrolled up one line. The previous top
line is lost, and the bottom line is blank. If Auto New Line is not enabled then line feed is
required to scroll. In ADM-3A+ and ADDS-520+ mode, Scroll Mode, Home is the first
position
of the last line.
Page Mode: Data is entered proceeding from the top to the bottom. Upon completion of
the bottom line the cursor is returned to the top of the display and data entry overwrites
previous data. In
ADM-3A+ mode the screen will scroll after completing the bottom line.
3.1.2.9 Auto LF/CR - ADM 3A+ Space Over Data
One switch (3 left bank) determines the effect of a carriage return code in all emulation
modes except ADM 3A+ mode. In the CR position the carriage return code causes the
cursor
to move the the left margin of the current line. In LF position the carriage return
code returns the cursor
to the left margin of the next line. If scroll mode is enabled and
the cursor is on the bottom line scroll will occur. Caution should be exercised when setting
this switch
as many computer systems will automatically send a carriage return code fol-
lowed
by a line feed code upon receipt of a carriage return code from the terminal.
7

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
In ADM 3A+ mode this switch enables the space over data function rather than the auto
LF on CR function. When set ON the space code is normally destructive (erases any data
at the cursor location)
until a carriage return code is received: The CR code will move the
cursor
to the left margin of the current line and change the space function to nondestruc-
tive.
Spaces received will move the cursor to the right without erasing data (effectively a
cursor right function)
until a line feed character is received, at which point the line feed
is executed and the space function is returned to the destructive mode. With this switch
OFF the space will remain in the destructive mode, carriage return and line feed codes will
be performe,.d normally.
3.1.2.10
Auto Net Line
One switch (2 left bank) enables the Auto New Line function. When set, the cursor will
proceed to the first position of the next line after the 80th character is entered. When
disabled, the cursor will remain in the 80th character position, overwriting this location
with subsequent data until it is moved by carriage return, line feed, or cursor command.
Cursor right, tab and back tab functions wrap when this switch
is set.
3.1.2.11 Data Terminal Ready
One switch (1 left bank) provides a switchable Data Terminal Ready function when revision
E
or later PCB is installed. When this switch is off, DTR will switch with Line/Local. When
this switch
is on, DTR will be true as long as the terminal is powered on, independent of
Line/Local.
3.2 SLIDE CONTROLS
3.2.1 General
Two slide controls are located on the bottom of the terminal to the left rear. The forward
control adjusts the high intensity brightness. The rear control adjusts the low intensity
brightness. Both controls are
set such that minimum brightness is achieved with the con-
trols slid toward the operator. Upon power on, the high intensity brightness is set first using
data entered
from the keyboard. El1tering half intensity mode and entering data will allow
the adjustment of low intensity brightness.
3.3
KEYBOARDS
3.3.1 General
Two standard keyboards are available on the VISUAL 200. Figure 3-2 details the layout for
the keyboard without function keys and the keyboard with function keys. The terminal is
also functional as a read only device. When the keyboard is not present the terminal is
initialized to the on line state. Any time any rear panel is altered on a read only configura-
tion it will be necessary to power off the terminal and power it on in order to insure that
the new switch setting has been recognized.
All keys except BRK, ON, ESC, RST, CP and CL have the type-o-matic feature. This
feature automatically repeats the selected character
for the length of time the key remains
depressed after
an initial delay of .75 seconds at a rate of 10 characters per second (110
baud) or 15 characters per second (150 baud or higher). Figures 3-3 and 3-4 detail the
codes transmitted by each key in each of the modes of operation.
8

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
The CAPS ON LY key, when illuminated, prevents the keyboard from generating any lower
case code in columns 6 and 7 of the ASCII chart, except for tilde (~) in Hazeltine mode and
Delete in all modes, and converts these attempts to the equivalent upper case code. This
key, in no way affects received data!
3.4 EXTERNAL VIDEO
A phono jack is provided so that the terminal can drive an external composite video input
monitor. The slave monitor must be able to accept a composite video signal which is 1.5 v.
p-p, 18.6 kHz horizontal line rate and have avideo bandwidth of 18 MHz.
9

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK , ANDOVER , MA 01810
STANDARD KEYBOARD
STANDARD KEYBOARD WITH FUNCTION
KEY
! e e
lim Il§l [ti"
FO fl Fe. F3 F4 F6 Fe F7 f6 Fe flO Fn FI2 tmI 1m} , ... I NO lIE
1"'13 _ -. I ~
------ - --- --
( 'csc.
II
$ % &.
( ) fi!I Ii3 W
2 3 4' 5 6 7 8 9 0 A \
B.
7 8 9
TAB
( IilI
[ili
[5j
Q. W E· R T' y
U·
0 P @ [ DEL 4 5 6
(TRI.. + * )
L'
rn!
@jj §il
A' S· 0' F ' G' H' J K L ; . J 1 2 3
SHifT
< > SHIFT
s<:""-L
0
liiil
~
Z x c V B
N'
M
• -=
C"PS
ONLY
ENTER
BLOCK MODE KEYBOARD
Figure 3-2 Keyboards
10

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
ALL MODES, ALL EMULATIONS
KEY CODE
FO
ESC P
F1
ESC Q
F2
ESC R
F3
ESC SPACE
F4
ESC!
F5
ESC"
F6
ESC#
F7
ESC $
F8 ESC%
F9
ESC &
F10
ESC'
F 11
ESC (
F12
ESC)
F13
ESC *
ESC
ESC
TAB
HT
BS BS
RETURN CR
LF LF
BY EMULATION
KEY
VISUAL 200 (VT52+)
ADDS 520+
HZ 1500+ ADM 3A+
ON*
...
LOCAL/ON LINE FUNCTION
~
*-
ESC D NAK BS BS
BRK*
...
250 ms. SPACING CONDITION
..
"-*
ESC C
ACK
DLE FF
RST*
...
INTERNAL FUNCTION
..
t
ESCA
SUB
~FF
VT
CP*
ESC v FF INTERNAL SUB
}
ESC B LF
~VT
LF
CL * ESC t
ESC t
~t
ESC t
HOME
ESC H SOH INTERNAL RS
BTAB ESC Z ESC Z
~DC4
ESC Z
(shifted TAB)
*These functions require simultaneous use of the "CONVERT FUNCTION" key. All keys are type-o-matic (auto-
matic repeating) except BRK, ON, ESC RST, CP, and CL.
Figure 3-3 Keyboard Transmitted Codes
11

VISUAL 200 (VT52+) ADDS 520+
HZ 1500+
KEY NORMAL ALT. MODE
NORMAL ALT. MODE
NORMAL ALT. MODE
--ESC?m -ESC?m -ESC?m
ENTER
CR ESC?M CR ESC?M
CR ESC?M
0 0 ESC?p
Vl
ESC?p 0 ESC?p
**CPY*
ESC /\ or ESC - ESC /\ or ESC -ESC /\ or ESC -ESC
/\ or ESC - -' or -?
-' or - ?
ESC?Q
ESC?Q ESC?Q
PRT*
ESC) ESC)
ESC) ESC)
-) - RS
. ESC?n . ESC?n . ESC?n
EL* ESC K
ESC K ESC K ESC K
-K -K
1 1 ESC?q 1 ESC?q 1 ESC?q
EF* ESCf
ESCf
ESC f ESC f
-f -f
2 2 ESC?r 2 ESC?r 2 ESC?r
EP* ESC J
ESC J ESC J
ESCJ
-J -J
3 3
ESC?s 3
ESC?s
3
ESC?s
DL*
ESC M
ESC M
ESC M
ESC M -DC3 -DC3
4 4 ESC?t 4 ESC?t 4 ESC?t
DC*
ESCO
ESCO ESCO
ESCO -0 -0
5 5 ESC?u 5 ESC?u 5 ESC?u
CT*
ESC 2 ESC 2 ESC 2 ESC 2
-2 -2
6 6 ESC?v 6 ESC?v 6 ESC?v
IL* ESC L
ESC L ESC L ESC L -SUB -SUB
7 7 ESC?w 7 ESC?w 7 ESC?w
**IC*
ESC i or ESC j
ESC i or ESC j ESC i
or ESC j ESC i or ESC j - i
or - j - i or - j
8 8 ESC?x 8 ESC?x 8 ESC?x
ST*
ESC 1
ESC 1
ESC 1 ESC 1 - 1
-1
9 9 ESC?y 9 ESC?y 9 ESC?y
*These functions require simultaneous use of the "CONVERT FUNCTION" key.
**If not in the mode the key will xmit the first sequence. If in the mode the key will xmit the second sequence.
Figure 3-4 By Emulation and Alternate Keypad Mode
ADM3A+
NORMAL ALT. MODE
-ESC?m
CR ESC?M
0 ESC?p
ESC
/\ or ESC - ESC /\ or ESC -
ESC?Q
ESC) ESC)
. ESC?n
ESC K ESC K
1 ESC?q
ESC f ESC f
2 ESC?r
ESCJ ESC J
3
ESC?s
ESC M ESC M
4 ESC?t
ESCO ESCO
5 ESC?u
ESC 2 ESC 2
6 ESC?v
ESC L ESC L
7 ESC?w
ESC i
or ESC j ESCiorESCj
8 ESC?x
ESC 1 ESC 1
9 ESC?y
<
(f)
c
l>
r
ooof
m
("')
:c
z
o
r
o
Cl
-<
Z
("')
o
:Xl
"
o
:Xl
l>
ooof
m
,0
:Xl
~
r
:Xl
o
l>
o
l>
<
m
z
c
,m
o
c
z
o
m
m
"
l>
:Xl
?'
l>
z
o
o
<
m
:Xl
s:
l>
~
~
o

VISUAL TECHNOLOGY INCORPORATED, RAILROAD AVENUE, DUNDEE PARK, ANDOVER, MA 01810
4. OPERATION
4.1 GENERAL
This section contains detailed information on the operation of each of the commands and
functions
of the Visual 200. In each of these discussions the remote command code
sequence
has been omitted. Appendix I details these sequences for the standard Visual 200,
and for each of the emulations.
4.2 CURSOR COMMANDS
CURSOR HOME: Places the cursor to the left margin top line when in page mode. In
Scroll mode,
ADDS 520+ and ADM 3A+ emulations Home is the left margin bottom line.
CURSOR UP: Moves
the cursor vertically up one line. In all modes except ADDS 520+ mode
the cursor
will not move beyond the top line. In ADDS 520+ mode the cursor will wrap
from the top line to the bottom line. In ADM-3A+ mode with scroll enabled, this key trans-
mits Control
K. Control K in scroll mode will not move the cursor up, however ESC A will.
CU RSO R DOWN: Moves the cursor vertically down one line. In Visual 200 (VT -52+) and
1500+ mode the cursor will not wrap beyond the bottom line, nor will the screen scroll. In
ADDS 520+ and ADM 3A+ mode the cursor will wrap from the bottom line to the top line
in page mode, or it will cause the screen to scroll when in scroll mode.
CURSOR RIGHT: In Visual 200 (VT -52+) and ADM 3A+ mode the cursor will move one
position at a
time to the right until thlmargin is encountered where it will remain. In
ADDS 520+ mode the cursor wraps to the beginning of the next line each time the right
margin
is encountered. In Hazeltine 1500+ mode cursor right moves the cursor to the right
one position wrapping
from the end of one line to the beginning of the next line until the
last position of the last line is reached. The cursor remains at this location ignoring further
cursor right commands. See also paragraph 3.1.2.10. In ADM-3A mode with scroll enabled,
this key transmits
Control L. Control L in scroll mode will not move the cursor right, how-
ever
ESC C will.
CURSOR LEFT: Moves the cursor one position to the left. In Visual 200 (VT -52+) and
ADM 3A modes the cursor will not wrap beyond the left margin of any line. In ADDS
520+ mode the cursor will wrap from the left margin to the right margin of the line above.
In Hazeltine 1500+ mode the cursor will wrap in the same manner as in the ADDS 520+
mode, however it will remain in the first position of the top line once this location is en-
countered.
See also paragraph 3.1.2.10.
UP SCROLL: This command will cause the cursor to move up one line at a time until it
reaches the top line. At this point subsequent commands will cause the screen to scroll
down one line. The top line will be erased and the former bottom line is lost.
CURSOR ADDRESS: This command sequence places
the cursor to a directed location on
the screen. In Visual
200 (VT -52+) mode the sequence is ESC Y YX where YX are the
location parameters specified in
Appendix III. In Hazeltine 1500+ mode the format is
~ DC1 XY where XY are the location parameters specified in Appendix V. The format for
ADM 3A+ mode is ESC = YX. Y and X parameters are defined in Appendix III. In ADDS
520+ mode the cursor address format is ESC Y YX. See Appendix IV for the values of X
and Y. ADDS 520+ mode also has a vertical cursor address sequence (VT parameter) and a
horizontal cursor address sequence
(DLE parameter). The parameters for vertical and
horizontal position are defined in
Appendix IV.
13