Texas Instruments 990 Owner's manual

Model 990 Computer
Model 911 Video Display Terminal
Installation and Operation
Part No. 945423·9701 *B
15
October 1981
TEXAS INSTRUMENTS

LIST OF EFFECTIVE PAGES
INSERT LATEST CHANGED PAGES AND DESTROY SUPERSEDED PAGES
Note: The changes in the text are indicated by a change number at the bottom of the page and a vertical bar in the outer
margin of the changed page. A change number at the bottom of the page but no change bar indicates either a deletion or a
page layout change.
Model 990 Computer Model 911 Video Display Terminal Installation and Operation (945423-9701)
Original Issue ................................... 1 June 1977
Revision
........................................ 15 January 1979
Revision
........................................ 15 July 1981
Change 1 ..................................... 15 October 1981
Total number of pages in this publication is 104 consisting of the following:
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© Texas Instruments Incorporated 1977. 1979, 1981
All Rights Reserved
PAGE
NO.
The information and/or drawings set forth in this document and all rights in
and
to inventions disclosed herein and patents which might be granted
thereon
disclosing or employing the materials, methods, techniques or
apparatus described herein are the exclusive property of Texas Instruments
Incorporated.
CHANGE
NO.

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'-V 945423-9701
PREFACE
This manual provides detailed instructions for installing the United States, European, and Japanese
versions
of the Texas Instruments Model 911 Video Display Terminal in conjunction with a prop-
erly installed Model 990 Computer. In addition
it contains information required to program the
computer to use the terminal and a description
of the unit with specific attention to the controls
and indicators. The information
is divided into the following four sections:
Change 1
General Description -This section briefly describes
the features and major components
of the terminal system to acquaint the reader with the system.
II Installation -This section provides step-by-step instructions for unpacking and install-
ing
the terminal system in either a local or remote location. The procedures presuppose
that the reader is not familiar with digital electronics.
If you do not choose to install the terminal yourself and would like one of Texas
Instruments' service personnel to install the terminal, please contact
your local Texas
Instruments sales or service office. Either
of these sources can also obtain for you
additional information concerning the terminal should you decide to perform mainte-
nance on
the terminal.
III Programming -This section presents interfacing information for use by a programmer
in designing a service routine
to control the terminal's activity.
IV Operation -This section describes the controls and indicators
of the terminal system
for terminal operators.
It includes not only keyboard information, but also terminal
status and maintenance indicators
so that the operator can determine if the terminal is
operating properly. This section also provides instructions to enable operating personnel
to perform preventive maintenance on the terminal.
APPENDIXES
A. United Kingdom Model -This appendix contains information for United Kingdom
Model 911 VDT keyboard and displayed character set.
B. French Model -This appendix contains information for French Model 911 VDT key-
board and displayed character set.
C. German Model -This appendix contains information for the German Model 911 VDT
keyboard and displayed character set.
D. Swedish/Finnish Model -This appendix contains information for the Swedish/Finnish
Model 911 VDT keyboard and displayed character set.
E. Norwegian/Danish Model -This appendix contains information for the Norwegian/
Danish Model 911 VDT keyboard and displayed character set.
F. Japanese Katakana Model -This appendix contains information for the Japanese Kata-
kana Model 911 VDT keyboard and displayed character set.
G. Arabic Model -This appendix contains information for the Arabic Model
911 VDT
keyboard
and displayed character set.
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I H. French Word Processing Model -This appendix contains information for the French
Word Processing Model 911 VDT and displayed character set.
Change 1 iv
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Paragraph
1.1
1.2
1.2.1
1.2.2
1.2.3
1.2.3.1
1.2.3
.2
1.2.3 .3
1.2.4
1.2.5
1.3
1.4
T ABLE OF CONTENTS
Title Page
SECTION I. GENERAL DESCRIPTION
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Communications Register Unit (CRU) ...................................... 1-2
VDT Controller. .................................................... 1-2
Display Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5
CRT Monitor .................................................... 1-5
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Control Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Keyboard
......................................................... 1-6
Interconnection Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6
Purpose of Equipment .................................................. 1-7
Displayed Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
SECTION II. INSTALLATION
2.1 General ............................................................ 2-1
2.2 Site Requirements ..................................................... 2-1
2.2.1 Mounting Surface ................................................... 2·2
2.2.2 Cabling Restrictions .................................................. 2-2
2.3 Unpacking/Packing
.................................................... 2-3
2.4 Remote Installation Cable Routing .......................................... 2-6
2.5 Terminal Installation
................................................... 2-6
2.6 Connection to Computer ................................................ 2-9
2.6.1 Location of Controller Circuit Board ....................................... 2-9
2.6.2 Installing the Controller
............................................... 2-9
2.6.3 Terminal Interrupt. .................................................. 2-12
2.6.4
ComputerPowerOn ................................................. 2-12
2.7 Terminal Checkout
.................................................... 2-12
SECTION III. PROGRAMMING
3.1 General
............................................................ 3-1
3.2 Terminal Controller Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2.1 Input Interface ..................................................... 3-1
3.2.2 Output Interface .................................................... 3-1
3.3 Screen Initialization .................................................... 3-1
3.4 Keyboard Codes ...................................................... 3-6
3.5 Cursor
............................................................ .3-12
3.6 Sample Routines
..................................................... .3-12
3.6.1 Polling Routine
.................................................... .3-15
3.6.2 Read Keyboard
............. " ....................................... .3-15
3.6.3 Echo Character to Screen
............................................. .3-16
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I
Paragraph
3.6.4
3.6.5
3.6.6
3.6.7
3.6.S
3.6.9
TABLE OF CONTENTS (Continued)
Title Page
Read Character From Screen ........................................... .3-17
Read Cursor Position
................................................ .3-17
Restore Cursor Position
.............................................. .3-17
Move Cursor ...................................................... .3-17
Clear Screen
...................................................... .3-18
Roll
Up Screen .................................................... .3-19
SECTION IV. OPERATION
4.1 General. : .......................................................... 4-1
4.2 Keyboard ........................................................... 4-1
4.3 Display Unit Controls and Indicators ......................................... 44
4.3.1 Control Panel ...................................................... 44
4.3.2 Data Indicators ..................................................... 44
4.3.3 VDr Controller Indicator .............................................. 4-5
4.4 Operator Preventive Maintenance
........................................... 4-5
LIST OF APPENDIXES
Appendix Title Page
A United Kingdom Model 911
VDr Keyboard Arrangement, Hexadecimal Codes,
Mode Character Positions, ASCII, and Special Character Set
....................... A-I
B French Model 911
VDr Keyboard Arrangement, Hexadecimal Codes, Mode
Character Positions, ASCII, and Special Character Set
........................... B-1
C German Model 911
VDr Keyboard Arrangement, Hexadecimal Codes, Mode
Character Positions, ASCII, and Special Character Set
........................... C-I
D Swedish/Finnish Model911
VDr Keyboard Arrangement, Hexadecimal Codes,
Mode Character Positions, ASCII, and Special Character Set
....................... D-l
E Norwegian/Danish Keyboard Arrangement, Hexadecimal Codes, Mode Character
Positions, ASCII, and Special Character Set
.................................. E-I
F Japanese Katakana Keyboard Arrangement, Hexadecimal Codes, Mode Character
Positions, Modified ASCII (JIS-S), Special Character Set, and Additional
Eight-Bit Displayed Character Set.
........................................ F-I
G Arabic Model 911 VDT Keyboard Arrangement, Device Service Routine
Interfaces,
and Keyboard Codes ................................................ G-l
H French Word Processing Model
911 VDT Keyboard Arrangement, Hexadecimal
Codes, Mode Character Positions, ASCII, and Special Character Set
........................... H-l
Change 1
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Figure
1-1
1-2
1-3
1-4
1-5
1-6
1-7
2-1
2-2
2-3
24
2-5
2-6
3-1
3-2
3-3
34
3-5
3-6
3-7
3-8
3-9
4-1
4-2
4-3
44
Table
1-1
2-1
2-2
2-3
LIST OF ILLUSTRATIONS
Title Page
Model 911 Video Display Terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Model 911 VDT Standard Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Major Terminal System Components ......................................... 1-4
Model 911 VDT Controller Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
United States Standard Keyboard Arrangement. ................................. 1-6
United States Model 911 VDT Displayed Character Set,
Including Graphics Symbols ............................................ 1-8
Model 911 VDT International Displayed Characters .............................. .1-10
Terminal Physical Dimensions
...................... : ...................... 2-1
Model 911 Video Display and Keyboard Shipping Container. . . . . . . . . . . . . . . . . . .. .... 24
Keyboard Shipping Container ............................................. 2-5
Basic Terminal Kit
..................................................... 2-7
Model 911 VDT Kit Cabling Configurations
.................................... 2-8
Typical Model 911 VDT Controller Board
..................................... 2-11
Computer Input Bit Assignments for Terminal a ................................. 3-2
Computer Input Bit Assignments for Terminal 1 ................................. 3-3
Displayed Character Positions
............................................. 3-5
Computer Output Bit Assignments for Terminal O ................................ 3-7
Computer Output Bit Assignments for Terminal 1 ................................ 3-8
Keyboard Showing Lowercase Mode Character Positions and
Hexadecimal Codes
................................................. .3-14
Keyboard Showing Uppercase Mode Character Positions and
Hexadecimal Codes
................................................. .3-14
Keyboard Showing Control Character Positions and
Hexadecimal Codes
.................................................. 3-14
Keyboard Showing Shift Mode Character Positions and
Hexadecimal Codes
................................................. .3-15
United States Model 911 Keyboard .......................................... 4-2
Display Unit Control Panel
............................................... 4-3
Data Indicator Locations ................................................ 4-3
Data Indicators Sample Pattern
............................................ 44
LIST OF TABLES
Title Page
VDT Display Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Terminal Site Installation Requirements ...................................... 2-2
VDT Controller Standard Configurations
...................................... 2-10
Addresses Assigned to CRU Expansion Chassis
.................................. 2-11
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Table
3-1
3-2
3-3
3-4
3-5
4-1
4-2
LIST OF TABLES (Continued)
Title Page
Model 911 VDT Controller Addressable Input Bits ............................... 3-4
Built-In Test
Input Signals ................................................ 3-6
Model 911
VDT Controller Addressable Output Bits .............................. 3-9
Built-In Test
Keyboard Simulation Data ..................................... .3-12
United States Keyboard Codes ............................................. 3-13
United States and European Keyboard Mode Selection ............................. 4-2
Japanese Katakana Keyboard Mode Selection ................................... 4-2
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1.1 GENERAL
SECTION I
GENERAL DESCRIPTION
The Texas Instruments Model 911 Video Display Tenninal (figure 1-1) is a versatile communica-
tions terminal that provides maximum operator convenience in a distinctively styled package.
The tenninal incorporates the following features
that enhance operation:
• Separate keyboard to facilitate placing the keyboard in the most convenient position
for the operator
• Upper- and lower-case gothic character set
• 32-character graphic drawing set (i920-character display only)
• Katakana character set (Japanese Katakana model only)
• Instant data display capability to allow the computer to display immediately a full screen
with infonnation
• A special-function bit that accompanies each character in memory, specifies whether the
character
is displayed at dual (high or low) intensity, and indicates such things as a pro-
tected field if used as a software flag (feature not available on Japanese Katakana model)
• Standard typewriter keyboard
• Numeric pad to facilitate entry of numerical quantities
• Programmable function keys.
In addition
to these operator features, the terminal provides programmable cursor positioning and
editing functions, a self-contained refresh memory plus a full-ASCII keyboard with additional
function keys suited
to the specific application. The Japanese model keyboard has a KANA mode
key
to select 64-character Katakana set.
The Model 911 Video Display Terminal (VDT) kit
is a peripheral unit that communicates with the
Model 990 Computer via the Communications Register Unit (CRU) serial data bus. The kit consists
of the following components:
• Model 911 VDT Assembly, Part Number 946075
• Model 911 Keyboard Assembly, Part Number 948560
• Interconnection cable, United States and Japan (unshielded), Part Number 948561;
European (shielded), Part Number 936500
• Model 911 VDT Controller, United States and European, Part Number 946076
• Model 911 VDT Controller, Japanese, Part Number 2263490.
Figure
1-2 illustrates the standard configuration tor the Model 911 VDT kit.
1-1
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135978 (911-477-39-3)
Figure 1-1. Model 911 Video Display Tenninal
Optional components available for the Model 911 VDT include:
• Extension cable assembly, Part Number 946093
• Extension cable kit, Part Number 936503
1.2 SYSTEM TERMINOLOGY
Figure 1-3 illustrates the relationship of the major components of the VDT system. The
following paragraphs describe the function of each of the components to provide an understand-
ing of system operation.
1.2.1 COMMUNICATIONS REGISTER UNIT (CRU). The Communications Register Unit
(CRU)
is the serial interface of the Texas Instruments Model 990 Computer. Data is transmitted
between the controller and the computer through this interface one bit at a time (each character
on the keyboard generates eight data bits). This transfer occurs so rapidly that no delay is
apparent to the operator. Status from the controller and control information from the computer
also use this interface.
1.2.2
VDT CONTROLLER. The Model 911 VDT Controller is implemented on a full-size
printed wiring board that fits into one of the chassis locations of a Model 990 family computer
or a Model990 family computer expansion chassis. Depending on the selected option, the
controller is actually one or two autonomous controllers that share a common CRU interface
and time-base generator.
The controller receives data from the computer and the terminal keyboard and stores screen
symbol data in a self-contained display-image memory. The controller reads the data from its
memory and generates a signal pattern to write that data onto the VDT screen. Data is
continually rewritten on the screen for image refresh.
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r'
~~----~L
91 1 VDT CONTROLLER.
JAPANESE. PART NO. 2263490
91 1 VDT CONTROLLER
UNITED STATES
AND EUROPEAN.
PART NO. 946076
INTERCONNECTION CABLE s:::::::l t:::::l
(SHIELDED) PART NO. 936500 '------------~
(UNSHIELDED\ PART NO.
948561.0PTIONAL CABLES UP ~
TO 2000 FEET (610 METRES)
LONG MAY BE SPECI FlED.
91 1 VDT KEYBOARD
ASSEMBLY
PART NO. 948560
(A)134307A
911 VIDEO
DISPLAY UNIT
PART NO. 946075
Figure 1-2. Model 911 VDT Standard Configuration
Display characteristics such as refresh rate (50- or 60-hertz), character capacity (1920 or 960
characters), and alphanumeric character set (display symbols) are specified by read-only memory
(ROM). Graphic character generator logic
is only available in the I920-character display.
Standard VDT controller options include:
• Single-display, 960-character capacity
• Dual display, 960-character capacity
• Single display, 1920-character capacity
• Dual display, 1920-character capacity.
Figure
1-4 is a simplified block diagram of the VDT controller.
1-3 Digital Systems Division

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COMPUTER
(A) 134308
ALARM ENABLE
VDT 0
MODEM AUDIO
\
CONTROL
VIDEO DATA
J
91 1
LOGIC
DISPLAY
\
UNIT
..
KEYBOARD DATA
TERMINAL STATUS
J J
...
911
VDT
-
CONTROLLER
CRU SERIAL
r
+-j AUDIO FROM
,.....
DATA
TO/FROM
COMPUTER
(A)134309
+-
------
MODEM MODULE
"-+
+- (JUMPER INPUT)
KEYBOARD
ALARM ENABLE
VDT 1
MODEM AUDIO
CONTROL
7
911
LOGIC
VIDEO DATA
DISPLAY
KEYBOARD
DATA
\
UNIT
..
..
TERMINAL STATUS
)
I"'"
KEYBOARD
Figure 1-3. Major Terminal System Components
VDT O-CONTROL LOGIC
•
MEMORY
•
KEYBOARD
•
BU IL T-IN-TEST
•
VIDEO OUTPUT LOGIC
•
ALARM
r
TIME
BASE
GENERATOR
~
VDT l-CONTROL LOGIC
•
MEMORY
•
KEYBOARD
•
BU IL T-IN-TEST
•
VIDEO OUTPUT LOGIC
•
ALARM
AUDIO
AUDIO
FROM MODEM
}
TO/FROM
DISPLAY UNIT
}
TO/FROM
DISPLAY UNIT
FROM MODEM
Figure 1-4. Model 911 VDT Controller Block Diagram
"
}
-
1-4
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___ 1.2.3 DISPLAY UNIT. The display unit houses a 30S-millimetre (12-inch) cathode-ray tube (CRT)
monitor, power supply, control logic, audible alarm logic, and two controls to allow the operator to
adjust the brightness
of the display and the volume of the audible alarm.
1.2.3.1 CRT Monitor. The CRT monitor
is a 30S-millimetre (l2-inch) monitor with a selectable
capacity
of 12 or 24 lines of information containing 80 characters each. The monitor produces
alphanumeric and graphic display characters using the television raster scan technique. Table
1-1
lists the principle display characteristics.
Functionally, the display
is characterized by the following features:
• Alphabetic, numeric, and special (+, -, *, etc.) character set
• Katakana character set (Japanese Katakana model only)
• Graphic character set (1920-character display)
• 960- or 1920-character formats
• Software-selectable cursor blinking
• Gothic font upper- and lower-case characters
• Dual intensity display (not on Japanese Katakana model).
1.2.3.2 Power Supply. The power supply in the display unit consists
of a power transformer
mounted on the display unit base and regulators on the logic board mounted at the rear
of the
display unit.
Table 1-1. VDT Display Characteristics
960 Characters 1920 Characters
Description
50Hz 60Hz 50 Hz 60
Hz
Character Matrix -Columns 5 5 5 5
-Rows 7 7 7 7
Character Block -Columns 7 7 7 7
-Rows
16 16 10 10
Frame (refresh) Rate 50 60 50 60
Lines of Characters
12 12 24 24
Character Rate (Dot rate divided
by dots per character in MHz.
1.57 1.57 1.57 1.57
Characters per row 80 80 80 80
Video Display Horizontal Size
Millimetres -tolerance ±6.35 215.90 215.90 215.90 215.90
(Inches -tolerance ±0.25) (8.50) (8.50) (8.50) (8.50)
Video Display Vertical Size
Millimetres -tolerance ±6.35 139.70 139.70 139.70 139.70
(Inches -tolerance ±0.25) (5.50) (5.50) (5.50) (5.50)
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1.2.3.3 Control Logic. The control logic on the printed wiring board at the rear of the display
unit contains logic
that supports the display function, provides an interface between keyboard
and VDT controller, and drives the audible alann.
1.2.4 KEYBOARD. A separate keyboard connects
to the display unit by a 1.52-metre (5-foot)
cable. The four-mode keyboard provides the 128-character ASCII code set and additional eight-
bit codes for special functions. The Japanese keyboard has two additional modes for generating
the Katakana character set. A key on the Japanese keyboard selects alphanumeric
or Katakana
character set. The key at the left
of the space bar configures the Japanese keyboard for genera-
tion
of the Katakana code set.
The 911 keyboard consists
of a basic alphanumeric keyboard, numeric pad, cursor pad, and a
function key array. Figure
1-5 illustrates the United States keyboard arrangement. Key caps are
removable and may be replaced
to provide custom legends for special applications such as inter-
national fonnats. (Refer
to the appendixes for illustrations of international fonnats.)
1.2.5 INTERCONNECTION CABLE. The interconnection cable joins the display unit and the
VDT controller. The standard cable
is 5 metres (16.4 feet) long and consists of coaxial cable for
video and seven signal lines (six conductors in balanced pair configuration and one single-ended
conductor). Optional cables are available
to provide a maximum separation of 610 metres (2000
feet).
ERASE ERASE
FIELD INPUT
PRINT f REPEAT
-
'NS
CHAR
(8)134310
.. I F2
F3 F4
FS F6
F7
FB CMD
SPACE
Figure 1-5. United States Standard Keyboard Arrangement
1-6
7 B 9
4 5 6
I 2 3
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1.3 PURPOSE OF EQUIPMENT
The Model 911 Video Display Terminal provides two-way communication between the VDT
operator and
the computer system. The VDT controller can be inserted into any available CRU
chassis location in the computer or expansion chassis. Together with the appropriate software
installed in the computer, the VDT allows the operator to perform the following functions:
• View the video display presented by the computer
• Enter data for display from the keyboard
• Edit any of the entered data as desired through the use of the controlling computer
program
• Store the display contents in computer memory for use by other peripheral devices
(printer, modem, etc.)
• Initiate special functions such as terminal self-test, print line, or scroll display. These
functions are activated by the program in response to input
of a special keyboard
character code,
or alternately, by entry of a control character at the keyboard.
1.4 OISPLAYEO CHARACTERS
Figure 1-6 illustrates the United States character set that is generated by the Model 911 VOT
controller and displayed on the CRT screen. Figure 1-7 illustrates the international set of characters
not illustrated in figure 1-6. Refer to Appendix F, figure F-9, for the additional 128 eight-bit
Japanese Katakana displayed character set.
1-7
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~ 945423-9701
ba
bs- b, b7 0 0 () 0 0 0 0 0 -----
b6 0 0 0 0 , , , 1
Msa -LSB bs 0 0 , I 0 0 , 1
"':',~: i'i' I. iii I'
"" 1'1'111111'
"" 1'1'111111'
"" 1'1'1"11111'
"" 1'1'111111' -
"" 1'1'111111'
"" 1'1'111111'
"" .'1'111111'
(B)136296A(I/2)
o 1 2 3 4 5 6 7
* GRAPHICS (1920-CHARACTER DISPLAY ONLY)
** REFER TO FIGURE 1-7 FOR EUROPEAN AND
JAPANESE CHARACTERS THAT VARY FROM
THOSE SHOWN.
Figure 1-6. United Scates Model 911 VDT Displayed Character Set,
Including Graphics Symbols (Sheet 1 of 2)
1-8 Digital Systems Division
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~ 945423·9701
be 0 0 0 0 0 0 0 0
"..-- be _ bl b7 0 0 0 0 Itt t
b6 0 0 t tOO t t
MSB-LSB
bs 0 tOt 0 t 0 1
"'~,"::' 1'1'111111'
"" I' '111111'
"" 1'1'111111'
"" 1'1'1111"11:'
~ ""1'1'1111"11:'
"" 1'1'1111"11:'
""1'1'111111:'
"" l'l'lllllle
(8) t 36296 (2/2)
o 1 2 3 4 5 6 7
* GRAPHICS (t920-CHARACTER DISPLAY ONLY)
** REFER TO FIGURE t -7 FOR EUROPEAN AND
JAPANESE CHARACTERS TIiAT VARY FROM
THOSE SHOWN.
Figure 1-6. United States Model 911 VDT Displayed Character Set,
Including Graphics Symbols (Sheet 2 of 2)
1-9
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7'B
1011
5,0
1101
5/0
1101
(B) 140750
1
o
1
1
o
1
2'3
0011
o
1
o
A. UNITED KINGDOM
1
o
5/B
1
,.
'"
1011
7.'0
1101
7/B
1011
7!B
1011
1 011
SID
1
o
1
7/E
5/C
1100
1
o
1
B. JAPANESE KATAKAN ..
7/0
1101 1110
I ""I
C. SWEDISH/FINNISH
•
--
--
1110
D. G';:RMAN
1
o
1 7/0
1101
7/C
1100
E. NORWEGIAN/DANISH
5/0
1
o
1
SIC
1
o
1
1 10 0 H"'r-+ __ ~1
1011~M~~
5/C
1100
1100
1
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1
Figure 1-7. Model 911 VDT International Displayed Characters
1-10 Digital Systems Division

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~ 945423-9701
SECTION II
INSTALLATION
2.1 GENERAL
This section provides information for planning the installation site, unpacking and packing the
terminal, installing the terminal and controller at the site, and ensuring that
the terminal is
operating properly. The instructions in this section require a moderate familiarity with cabling
technique and use
of common handtools, but do not assume any level of expertise in digital
electronics.
2.2 SITE REQUIREMENTS
Because the keyboard is separate from the display portion of the terminal, the terminal can be
mounted in several configurations to suit
the needs of the operating environment. The
installation·site must, however, conform
to the physical dimensions of the terminal as illustrated
in figure 2-1. Table
2-1 summarizes some of the requirements. The following paragraphs explain
their significance.
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U"lU"l
f'C') f'CII
to • <0\0
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- .......
f
14---- 450. 85 MM
(17.75 IN.)
~
---.tl
9.65 MM
(0.38 IN.)
85.725 MM
(3.375 IN.)
508.00 MM
(20.00 IN. )
OIL---- _10
(A)134311A
Figure 2-1. Terminal Physical Dimensions
2-1
Digital Systems Division
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~
945423-9701
Table 2-1. Terminal Site Installation Requirements
Requirement Display Only Keyboard Only Display/Keyboard
Minimum Width
508mm
508mm
508mm
(20 in.) (20 in.) (20 in.)
Minimum Depth 483 mm 216 mm
711 mm
(19 in.) (8.5 in.) (28 in.)
Minimum Vertical 345 mm Free access
to
343mm
Clearance (13.6 in.) keys (keyboard
is
(13.5 in.)
102 mm (4 in.) high)
Recommended Height of
Mounting Surface from
Floor:
Seated Operator
711 t0914mm
711 mm 711 mm
(28 to 36 in.) (28 in.) (28 in.)
Standing Operator 1067
to 1270 mm 1067 mm 1067 mm
(42 to 50 in.) (42 in.) (42 in.)
Operating Temperatures
O°C to 40°C*
O°C to 40°C* 0° C to 40°C*
(32°F
to 104°p)
(32°F to 104°F*) (32°F to 104°F*)
Operating Humidity
5% to 95%
5% to 95%
5% to 95%
Altitude 3048 metres 3048 metres 3048 metres
(10,000 feet) (10,000 feet) (10,000 feet)
*At sea level. Derate to 32°C (90°F) at 3048 metres (10,000 feet).
2.2.1 MOUNTING SURFACE. The VDT components require adequate mounting space on a
flat, horizontal surface. The space must allow room at the rear
of the display unit for cable
connections, clearance at the front
of the display unit for adequate viewing, and operator access
to the front of the keyboard. The mounting surface must be free of any material that could
block the- ventilation louvers on the underside
of the display unit. Consideration of the
operator's normal position (sitting
or standing) when using the terminal determines the height of
the mounting surface.
2.2.2 CABLING RESTRICTIONS. Cable lengths affect the positioning
of the equipment at the
site.
If the keyboard is operated as a separate unit from the display, it must remain within 1.52
metres (5 feet)
of the keyboard input connector on the rear of the display due to the length of the
cable. This restriction also ensures
that the operator can clearly view the display screen. In addition,
the display unit must be within 1.83 metres (6 feet)
of a grounded outlet for input power. The
display can be positioned up
to 5 metres (16.4 feet) away from the controlling Model 990
Computer through the use of a single basic cable assembly. Distances in excess of 5 metres (16.4
feet) up
to a maximum of 610 metres (2000 feet) from the computer can be achieved through the
use
of an optional extension cable assembly. The extension cable assembly (Part Number 946093)
2-2 Digital Systems Division