700117_Telex_TC277C_D_Keyboard_Display_Terminal_Operators_Manual_Mar1979 700117 Telex TC277C D Keyboard Display Terminal Operators Manual Mar1979

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OPERATOR'S MANUAL
TC 277C/D KEYBOARD DISPLAY TERMINAL

TERMINAL
TELEX
~.=;..;;;~~-=® COMMUNICATIONS
3301 Terminal Drive

Raleigh, North Carolina

27604

919/834-5251

700117

OPERATOR'S MANUAL
TC 277C/D KEYBOARD DISPLAY TERMINAL

TELEX

-=--=.=.=.;=-=®.

TERMINAL
COMMUNICATIONS

3301 Terminal Drive Raleigh, North Carolina 27604

919/834-5251

700117

ISSUE/REVISION SCHEDULE
Comments

Rev. No.

Original Issue

Complete Reissue

...

-~.-

....

- - - - -.... -.

.......

-~--~----

....

Revised Date

3-1-79

-.-~-~------.--~--

TC 277C Display Terminal

TC 2770 Display Terminal

TABLE OF CONTENTS

Page

INTRODUCTION .......................................................................................................................... 1
DESCRIPTION .......................................................................................................................................................2
CUSTOMER INSTALLATION........................................................................................................................2

OPERATING CHARACTERiSTiCS .................................................................................... 3
OPERATING MODES .........................................................................................................................................3

Data Input Mode .............................................,............................................................................................3
Insert Mode ....................................................................................................................................................3
Security Locked Mode ..................................................................:..........................................................3
DiagnostiC Mode .........................................................................................................................................3
Selected Mode .............................................................................................................................................3
CONTROLS AND INDiCATORS ..................................................................................................................3

Operator Controls ......................................................................................................................................3
Indicators...........:............................................................................................................................................4
DISPLA Y SCREEN ...............................................................................................................................................4

Cursor...............................................................................................................................................................5
Wrap ......................................................,............................................................................................................5
Audible Alarm ...............................................................................................................................................5
Display Fields ...............................................................................................................................................5
Attribute Characters .................................................................................................................................8
Automatic Skip.............................................................................................................................................8
ADDITIONAL FEATURES................................................................................................................................8

Operator Identification Card Reader (OICR) Feature ..............................................................8
Selector Pen Feature................................................................................................................................7

KEyBOARDS .................................................................................................................................9
TYPEWRITER KEyBOARD ..........................................................................................................................10
CHECK PROCESSING KEyBOARD ......................................................................................................11

Data Input Keys ...........................................................................................................................11
Cursor-Positioning Keys .....................................................................................................................12
Editing Keys ...............................................................................................................................................14
Program Attention Keys .......................................................................................................................15
Special Function Keys ..........................................................................................................................18

TABLE OF CONTENTS (Cont.)
Page

DATA ENTRY KEyBOARD...........................................................................................................................17
DATA ENTRY KEYBOARD WITH KEYPUNCH LAYOUT ............................................................18

Data Input Keys ........................................................................................................................................18
Cursor-Positioning Keys ....;................................................................................................................19
Editing Keys ...............................................................................................................................................21
Program Attention Keys .......................................................................................................................22
Special Function Keys ..........................................................................................................................23
OPERATOR CONSOLE KEyBOARD .....................................................................................................24

Data Input Keys ........................................................................................................................................25
Cursor-Positioning Keys .....................................................................................................................25
Editing Keys ...............................................................................................................................................27
Program Attention Keys .......................................................................................................................28
Special Function Keys ..........................................................................................................................29

OPERATING PROCEDURES ........................:.....................................................................31
MAINTENANCE.............................................................................................................................................................35
OENERAL ..............................................................................................................................................................35
Cleaning .......................................................................................................................................................35
Operating Environment ........................................................................................................................35

TROUBLE WITH THE TERMINAL.....................................................................................37
OENERAL ..............................................................................................................................................................37
No Power......................................................................................................................................................37
Request for Test ......................................................................................................................................37
DIAGNOSTIC TESTS .....................................................................................................................................37

Power-on DiagnostiC 1ests ................................................................................................................37
Operator-Initiated DiagnostiC 1ests..............................................................................................37
SERVICE CALLS ...............................................................................................................................................43

II.

III.

Iv.

INTRODUCTION

The TC 277C/O Keyboard Oisplay Terminal is
classified as a programmed terminal; that is, certain operations of the terminal are controlled by
programs stored in memory and executed by an
internal microprocessor. The TC 277C/O is both
an input and an output data terminal. The Operator uses function switches to signal the Central
Computer application program, thus causing the
program to display either formatted or unformatted data on the screen of the cathode-ray tube
(CRT). This data is displayed in the forrTi of
alphameric characters and symbols and is simultaneously entered and stored in an internal,
temporary storage area (buffer). The Operator
uses a keyboard and function switches to input,
edit, and delete data in the display. The Operator
then enters the displayed data into the Central
Computer for storage or additional processing. If
an optional printer is attached to the Control Unit,
the application program can initiate hard-copy
printout of the displayed data. A typical installation with its associated equipment is shown
below.

This Operator's Manual is intended to help the
Operator understand the functions and operating
procedures of the terminal. Subsequent sections
of the Manual will describe the various components of the terminal; how to install the
TC 277C/O; how to receive data from the Central
Computer; how to input, edit, and delete displayed data; how to use the program function keys to
manipulate displays or the entire system; how to
perform minor maintenance; and how to obtain
service in case of equipment m,alfunction. For
additional information or assistance, contact the
TTC Marketing Representative.

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TC 284, TC 286,
TC 287, TC 289
PRINTERS

Typical Installation of a TC 277C/D Keyboard/Display Terminal.

DESCRIPTION
The TC 277C/D Keyboard Display Terminal consists of an attached keyboard and a 15-inch
video screen. The keyboard is similar to an ordinary typewriter keyboard. It is used to compose
messages using the displayed format and to
make necessary changes; cause messages to be
printed; and transmit all data entered. The
keyboard functions are discussed later in the
OPERATING PROCEDURES section of this
manual.
The screen displays alphameric and special
characters with dual-intensity to assist you in
message preparation. Types and locations of data
displayed on the screen are shown in the
OPERATING PROCEDURES section. A combined
on-off/brightness-contrast control knob and the
optional Audible Alarm Feature are the only operator controls on the display assembly. See
CONTROLS AND INDICATORS for definition of
control functions.
A printer is used in association with the
TC 277C/D Keyboard Display Terminal when a
hard-copy printout is required.

CUSTOMER INSTALLATION
The TC 277C/D Keyboard Display Terminal has
been designed with the user in mind. The design
supports customer installation and set-up, which
saves valuable time and the inconvenience of
waiting for Field Engineer installation. No special
equipment or tools are required to set up the
terminal for operation. When your terminal
arrives, simply remove the packing material and
follow the instructions listed below:

• Place the unit within 6 feet of the 115 VAC
power outlet.
• Place the keyboard in front of the display.
• Ensure the following environmental
parameters are adhered to:
• Temperature Range:
+ 95°F (10°C to 35°C).

+ 50°F

• Humidity: 8% to 80% relative humidity (no condensation).
• Ensure that the Power ON/OFF Switch
located at the front right side of the unit is
In the OFF position (pushed in).
• Plug the AC power cord into the 115 VAC
power outlet.
• Pull out the Power ON/OFF Switch; allow
approximately 30 seconds warm-up time.
• Watch for the cursor to appear on the
screen. On the status line near the bottom
of the screen, observe r01 c01. If these
conditions are not present, or if any other
characters are observed, refer to
DIAGNOSTIC TESTS.
• Depress ENTER and verify that thelNPUT
INH message indicator is displayed on the
status line.
• Depress RESET and verify that the INPUT
INHmessage indicator is extinguished.
• Depress several alphabetic character
keys. The appropriate characters for the
keys depressed should be observed on
the display screen.
• Push in the Power ON/OFF Switch.
• Connect the coax cable from the controller to the coax receptacle at the rear of the
unit.
• If the Selector Pen is supplied with the
unit, refer to SELECTOR PEN FEATURE.
• If the optional Operator Identification
Card Reader (OICR) is supplied with the
unit, connect the OICR cable to the receptacle at the lower-left corner of the
unit (as observed from the rear) and refer
to OPERATOR IDENTIFICATION CARD
READER (OICR) FEATURE.
The installation of your TC 277C/D Keyboard
Display Terminal is now complete and the terminal is ready for normal operation.

OPERATING CHARACTERISTICS

OPERATING MODES

The TC 277C/D has been designed to operate in
several modes. Only a brief description of each
mode is given below. Detailed descriptions of the
modes are presented in KEYBOARDS and
OPERATING PROCEDURES of this section.

SELECTED MODE

In this mode the terminal is in the process of executing a command sent by the Central Computer
application program. INPUT INH will be displayed
on the status line.

DATA INPUT MODE

In this mode the Operator Inputs data onto the
display screen from the keyboard. The terminal is
In Data Input Mode whenever power Is on the
terminal and the INPUT INH (inhibited) or INS
(insert) MODE Indicators are not ON.

INSERT MODE

This is an editing mode which allows the Operator
to Insert new characters within data already displayed on the display screen. This mode Is entered from Data Input Mode by depressing the INS
MODE Key and Is exited by depressing the
RESET Key.

SECURITY LOCKED MODE (Optional)

This feature provides key-swltch-operated control over communications with the Central
Computer application program. With the keyswitch turned to the ON position, the terminal will
be Inaccessible to the application program and
the keyboard will be inhibited, thus preventing
data Input to the display screen from the keyboard, card reader, and selector pen operations.

CONTROLS AND INDICATORS

The fundamental uses of the controls and indicators will become apparent once you, the Operator,
actually become involved with the display screen
and keyboard functions. This section describes
the functions of the Operator controls and the
displayed message indicators.

OPERATOR CONTROLS

The Operator uses these controls to apply power
to the terminal, adjust the image on the display
screen for optimum viewing comfort, and adjust
the Audible Alarm.
• Power Switch

The Power Switch is a tri-function switch
and control used to apply power, control
the display contrast, and adjust the image
intensity.

DIAGNOSTIC MODE

The Diagnostic Mode Is designed for use by the
Operator or the Field Engineer In diagnosing
equipment operation and malfunction. (While in
this mode, the terminal cannot communicate with
the system.) Diagnostic Mode is entered and
exited by depressing the DIAG Key while simultaneously holding down the ALT FUNC Key. A
second depression of this key sequence will reset
the terminal to Its normal mode of operation.

CONTRAST

The Operator pulls out the switch to apply
power to the terminal (and pushes it back
in to turn it off). After a short warm-up
period, a special symbol (the cursor) will
appear on the screen. The cursor is discussed under DISPLAY SCREEN.

• SYS AVAIL (system available). Indicates
that the Central Computer is available to
accept an Operator-initiated transmission.
• INS MODE (Insert mode). Indicates that
the terminal is in Insert Mode, an editing
mode in which characters can be inserted
into data already displayed on the screen.

• Brightness Control

• INPUT INH (input inhibited). Indicates
that input from the keyboard, Operator
Identification Card Reader (OICR), and
Selector Pen is inhibited (prevented). The
operating characteristics of the terminal
are so designed that certain functions of
the keyboard are prevented when attempted at inappropriate times.

The brightness of the characters appearing on the display screen can be adjusted
by turning the knob of the Power Switch
counterclockwise to make the image dimmer, clockwise to make it brighter.

• Contrast Control
The contrast of the viewing image is adjusted by turning the knob at the rear of
the Power Switch. The Operator will find
this control useful in distinguishing
between two levels of intensity--normal
and high.

oNAME
o:~~ill~~¥:

D~~~~~:

oJOB TITLE 0WRITER

• Audible Alarm Volume Control (Additional Feature)
The Audible Alarm is adjusted by turning
the knob located underneath the front
righthand corner of the terminal housing.
(See DISPLAY SCREEN.)

OJOHN B. DOC

oPHOI'E II
oORDER.l1
oPART II

I
SYS AVAIL

0683-4.,42

012345
D789123-A

~(St.tU8U".)

I INS MODE I INPUT INH I

oDenotes

R24 COl

an attribute character (not visible)

H!j#'~/ Nondisplay data.

INDICATORS
Status Line Messages.
The display screen Is an Indicator which enables
the Operator to observe the data-entry process
and which displays the message indicators described below.

M..sage Indicators
The message indicators are displayed on the status line near the bottom of the display screen.
(See illustration, Status Line Messages.) The status line facilitates operator access of status information and other operator-related information
about the current mode of operation. The messages displayed are as follows:

DISPLAY SCREEN

The display screen enables the Operator to observe the data entry process. The screen displays
a graphic representation of the data stored in the
buffer as received from the application program
as well as the data entered by the Operator. The
character pOSition to be occupied by the next
character entered Is indicated by the cursor.

CURSOR

This special symbol is automatically generated
when the Power Switch is pulled ON and occupies the first position in the buffer (upper leftmost
position on the display screen). The cursor (resembling a reverse image) is used to indicate
where the next character entered from the keyboard will be displayed. The cursor displays
around an empty character position (called a
"Null"), which an entered character will fill, or
around a displayed character, which an entered
character will replace. The cursor's position in the
display is shown by the R (row) and C (column)
address displayed in the status line (e.g.; R24
COl: Row 24 Column 1).
The Operator can reposition the cursor to any
character position on the display screen by using
the cursor-positioning keys, and the application
program can reposition the cursor to any character position. In neither case will the cursor enter
characters into the character positions it occupies as it moves across the screen.
Unless otherwise repositioned by the application
program, the cursor will move to the next sequential character position after a character has been
entered on the display screen. Although the cursor can be positioned in certain "protected" character positions (explained in DISPLAY FIELDS,
below), characters cannot be entered into these
positions from the keyboard. The cursor is not
affected by field attributes nor by the optional Key
Lock Feature; it is displayed even when positioned in a nondisplay field and when the Key
Lock Feature (if installed) is ON.

WRAP

The cursor will "wrap" the display screen; that is,
if the cursor is repositioned beyond the limits of
the display screen in any direction, it will reappear on the opposite side of the screen.
AUDIBLE ALARM

This additional feature is an aid to the Operator.
The Alarm sounds whenever the Operator enters
a character in the next-to-Iast character position

on the display screen. This alerts the Operator to
the fact that the cursor is about to wrap; that is, go
off the display screen and reappear at the top
leftmost character position. Subsequently entered characters will replace any data already
displayed. The Alarm may also be sounded by the
application program; the conditions necessary for
this are defined in the User's Guide. The Alarm
also sounds when an unsuccessful OICR cardread operation is attempted.

DISPLAY FIELDS

An application program can enter data onto the
display screen in two basic methods--unformatted and formatted. When the display is
unformatted, the Operator enters data onto the
screen in a free-form manner. When the display is
formatted, all or part of the displayed data is arranged in a predesigned form by the application
program. Much of the data that is entered into a
Central Computer is organized into "fields"--for
instance, dates, names, order numbers, or part
numbers. Application programs standardize the
arrangement of these fields in order to make data
entry faster and easier. An example of this standardized arrangement (or format) is shown in the
Example of an Operator-completed Format. In this
case, the fields are NAME, SALARY, JOB TITLE,
PHONE /I, ORDER' , and PART' . Note that the
first character position in each field is occupied
by a symbol (D). Each symbol represents a
nondisplayed control character, which Is called
an attribute character because it defines the
characteristics or attributes of the data that follow
it. Each attribute character plus all the data following it, up to the next attribute character, Is
called a "field." Each attribute character occupies a character position in the buffer, although it
cannot be seen or printed. During a display or
printout, Its character position appears as a
space. In this format, Input fields are provided into
which the Operator will Input data.
The Example of an Operator-completed Format
illustrates how an Operator might complete Input
fields. The total number of character positions
provided in an input field has been selected to
provide for the longest possible insertion. If an
attempt is made to exceed this total number, the
INPUT INH indicator will come on and the keyboard will be inhibited; or, If a "numeric protected" attribute follows the Input field, the cursor
will skip (tab) to the next Input field.

ATTRIBUTE CHARACTERS

bold display in the input field for ORDER
II represents an intensified display field.
Since the data entered into a nondisplayed input field is not visible, the Operator should note that it will be impossible to
visually verify this entered data before
transmitting it to the Central Computer.

Attribute characters, in addition to defining the
start of a field, also define other characteristics
for all character positions contained in that field.

• TAB STOP POSITIONS. These positions
are the first character positions in an input field in which data can be entered.

oNAME

OJOHN B. DOE

o$.~ill.~~¥j

O~~~2.~j

AUTOMATIC SKIP

oJOB TITLE 0WRITER

oPHONE II
oORDER #
oPART /I

0683-4742
D1234~

D789123-A

I
SYS AVAIL

I INS

MODE I INPUT INH I

oDenotes

R24 COl

an attribute character (not visible)

U~~~~H Nondisplay data.

Example of an Operator-completed Format.

In certain instances the cursor will automatically
skip the next field or fields after a character has
been entered into the last character position in an
unprotected data field. If the attribute character of
the next field defines it as numeric and protected,
the cursor will automatically skip that field and
will, instead, occupy the first character position in
a numeric, unprotected field or an alphameric,
unprotected field.

• PROTECTED OR UNPROTECTED. The
displayed fields shown in the left column
of the format example would normally be
protected, thus preventing their modification by the Operator. Unprotected fields
are defined as input fields to be filled in by
the Operator, as shown in the example
above.
• ALPHAMERIC OR NUMERIC. An alphameric field is one in which alphabetic,
numeric, or symbol characters can be entered (for example, the input field for PART
/I). A numeric field (applicable with the
optional Numeric Lock Feature, only) is
one in which only numeric data can be
entered (i.e., the digits 0 through 9, period,
and minus sign, plus the DUP Key if the
SHIFT and LOCK Keys are also depressed on typewriter-style keyboards).
The input field for PHONE /I is a numeric
field.
• CHARACTER DISPLAY. The input fields
for NAME, JOB TITLE, PHONE /I, ORDER
#. , and PART II. are displayed; the input
field for SALARY Is nondisplayed; and the

ADDITIONAL FEATURES

OPERATOR IDENTIFICATION CARD READER
(OICR) FEATURE
Description

When the display terminal is equipped with the
optional OICR Feature (which is attached through
a cable), the Operator can send a coded message
to the host system by passing a special magneticstriped card through the slot. The Operator may
be required to use the OICR when beginning operation of the display terminal.

Audible Alarm (optional) will souad if any of the
following conditions exist when the card is read:
• A read error was detected. (Pass the card
through the OICR again.)
• The INPUT INH indicator is on prior to
reading the card. Turning on this indicator
as part of the OICR operation is not an
operational error and does not prevent
data from being loaded into the buffer.
• The cursor is located in a protected field
before the card is read.
A specially designed (coded) credit card may also
be used to update an account or request information about accounts. The code, which identifies
the person using the OICR or which represents an
account number, is contained on a magnetic
stripe attached to the back of the card. The card
data is held in the terminal buffer as a nondisplayed, nonprintable field and the entire field is
protected. If the terminal is unformatted, the entire screen will be a protected field.

Operation

To operate the OICR, follow the procedure detailed below:
• Set the ON-OFF Switch to ON.
• If the INPUT INH (inhibited) indicator is
displayed, depress RESET.

• The cursor is located in an attribute location before the card is read.

SELECTOR PEN FEATURE

The optional Selector Pen Feature (often called a
Light Pen) is a light-detecting device that enables
the Operator to select certain data fields to be
read by the User's program for further processing.
By preSSing the tip of the pen against the screen
over a selectable field (thus activating a switch in
the pen), the Operator selects the field; that is,
signals the application program that more information about the displayed data is needed or
that selected information is being input. The selector pen is stored in its holder, which is securely
attached to the terminal, thus insuring that the
stored pen is always in the same place and is
pointed in the same direction.

• Pass the magnetic card through the OICR.
The cursor will advance across the
screen at a rate of one space per character accepted. A successful read will produce one keyboard click for each character selected, an AID code will be set, and
the keyboard will be inhibited to prevent a
mix of reader/keyboard data.

Improper Card Reads

Card data will not be read into the buffer and the

Selector Pen.

A format containing the light-pen-selectable
fields will be displayed, under control of the application program. The format may look similar to
the one shown here. A selectable field is one that
can be detected by the selector pen. To see at a
glance whch fields are selectable, depress the tip
of the selector pen against the palm or table top.
An easily seen line will appear through all selectable fields. This line will always be of high
intensity, Independent of the intensity of the characters displayed. Note that some of the selectable
fields are preceded by a question mark, in this
case called a designator character. There are
only two visible designator characters--the question mark (?) to designate an unselected field,
and a "greater than" symbol (») to designate a
field which has been selected.

NAME:
ADDR:

ADDR:

Typically, the selection process is completed by
se lecting a selectable field that is not preceded
by a visible designator sign. These fields can be
determined by depressing the selector pen
against the palm, which will cause an intense line
to appear through all selectable fields. Completion of the selection process will signal the application program that action is needed and will
inhibit any further selections or keyboard entries
until the application program allows them. Typical
procedures have been given for the use of the
selector pen. Consult the User's Guide to determine the exact procedures to follow for your
particular application program.

John Doe

900 Ea.t St.
Raleigh

COMP:

er than" sign will change back to a question mark.
The Operator can select as many selectable
fields as required.

27609

Terminal ComrTU'lications
:n Ol Terminal Dr.
Raleigh
NC
27604

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DA TE CF ARRIV:

7Jan

?Feb

?Jul

> Aug

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Car"Cel

Example of Selectable Fields Format.
Using the Selector Pen.

To select a field, position the selector pen directly
over any character in the field and depress the tip
against the screen. Since a light detector in the tip
of the pen will be energized by light emitted by a
character on the screen, it is important that the
pen be held approximately perpendicular to the
screen and directly over a character in the field to
be selected; otherwise the wrong field may be
selected. As a sign that the field has been selected, the question mark In front of the field will
change to the "greater than" sign. The Operator
should verify that the designator character of the
desired field has changed. Should the wrong field
be selected, it can be deselected by performing
the selection process a second time: the " great-

KEYBOARDS
The TC 277C/D Display Terminal may be
equipped with one of five types of keyboards,
each of which was designed to operate in a
specific data-processing environment. The keyboard enables the Operator to change, edit, or
create character displays except within fields
defined by attribute characters as protected from
keyboard operations. Alphameric character keys,
control keys, and special function keys are provided to facilitate data entry and image modification. The five types of keyboards include the
Typewriter, Typewriter with Check Processing
Feature, Data Entry, Data Entry with Keypunch
Layout, and Operator Console.
For each of the keyboards listed above, the keyboard layout is shown and the keys described by
function. The section DATA INPUT KEYS explains
the functions of the keys used in the normal, Data
Input Mode. The section CURSOR POSITIONING
KEYS explains how the cursor is positioned on
the displ·ay screen. The section EDITING KEYS
shows the Operator how data displayed on the
screen can be modified (or edited). The section
PROGRAM ATTENTION KEYS explains how to
request actions by the application program.
The alphameric, special symbol, and cursor control keys are autorepeat; that is, they are designed to repeat their functions if held depressed.

TYPEWRITER KEYBOARD

, The Typewriter Keyboard closely resembles the
standard office typewriter keyboard: most of its
keys are in the same location and perform the
same functions. The following discussion of the
keyboard is organized according to the functions
of the keys. Key functions of both the Typewriter
Keyboard and Check Processing Keyboard are
described beginning on the next page.

The Typewriter Keyboard contains either 26 or 27
symbols and punctuation marks. The total number, as well as the actual symbols and punctuation marks, will depend upon the model of the
keyboard. Symbols and punctuation marks listed
below may be found on the Typewriter Keyboard:

FUNCTION PAD, SHOWN,
OR NUMERIC PAD

Key

Sign or Punctuation Mark

Key

Sign or Punctuation Mark

I
I

logical OR
exclamation mark
at
number
dollar
percent
cent
logical NOT
circumflex
ampersand
asterisk
left parenthesis
right parenthesis
underscore
minus or hyphen

plus
equals
opening bracket
closing bracket
back slash
colon
semicolon
quotation mark
apostrophe
less than
comma
greater than
period
question mark
slash

@l
/I
$
%
C

....,

"&•
(
)

....,.

[
]

,
"

<
)

?
/

CHECK PROCESSING KEYBOARD

The Check Processing Keyboard provides a
modified typewriter keyboard layout which lends
itself to banking applications such as check verification. This layout allows the Operator to work
from the righthand portion of the keyboard (numeric pad) by placing a plus sign (+), decimal
point (.), and a forward tab to the immediate left of
the numeric pad. This keyboard is equipped with
the EBCDIC character set.

DATA INPUT KEYS

The Operator uses these keys to enter data onto
the display screen in the normal Data Input Mode.

Alphabetic Characters

The keyboard contains the 26 alphabetic characters. Both uppercase and lowercase alphabetic
characters can be entered into the buffer and
transmitted to the Central Computer and
displayed.

SHIFT and LOCK

The SHIFT and LOCK Keys function exactly as on
a standard office typewriter keyboard: whenever
the SHIFT Key is held depressed, the character or
symbol on the upper portion of a dual-character
key will be displayed when that key is depressed.
If the SHIFT Key is not depressed, the character
or symbol on the lower portion of the key is displayed. The keyboard can be locked in the shift
position by depressing the LOCK Key; the keyboard can be unlocked from the shift position by
depressing the SHIFT Key again. Both uppercase
and lowercase alphabetic characters can be entered into the buffer and transmitted to the Central Computer and displayed.

Numeric Characters

The typewriter keyboard contains the 10 numeric characters; in addition, your keyboard
may have this optional 10-key
numeric pad configured in adding-machine style, thus providing an optional method of
entering numeric data.

Numeric Lock Feature

When equipped with this optional feature, the
terminal will automatically shift to Numeric Mode
if the display screen is formatted and the cursor
enters a numeric field. In Numeric Mode only
these keys can enter data: the digits 0 through 9,
period, minus sign, and DUP (duplicate) (when the
SHIFT or LOCK Key is also depressed). Depressing any other key in Numeric Mode will
inhibit the keyboard and turn on the INPUT INH
(inhibited) indicator. The Input Inhibited condition
can be reset by depressing the RESET Key. No
provision is made to override this feature and allow entry of alphabetic characters into a protected numeric field.

~~
PA2

The Operator uses the FIELD MARK Key to mark
the end of a field when the display screen is
unformatted. A semicolon (;) will be displayed,
and the application program will be informed that
this character represents the end of a field.

~
The AL T FUNC (alternate function) Key functions
as a shift key for the keys directly above it and the
HOME Key.

SpaceBar

The Space Bar functions the same as on a standard office typewriter keyboard except that the
Space character occupies a character position
on the display screen in the buffer and in the
transmitted data. For this reason the Space Bar
should not be used to position the cursor. (See
CURSOR-POSITIONING KEYS, below.) The
Space Bar is an autorepeat key.

This key is used to reset Input Inhibited or Insert
Mode conditions except that the key is inoperative while the terminal is transmitting or receiving
data.

An Operator frequently processes a series of
documents in which the same data (such as the
date) is entered into a particular field on every
document. The DUP Key is provided to speed up
this sort of entry. Typically, the Operator enters
the data on the first document; on successive
documents the DUP Key can be depressed when
the cursor is positioned in the first character position in the appropriate input field. An asterisk will
be displayed in the character position, a tab to the
next unprotected character position will be
performed, and the application program informed
that a duplicate operation has been requested.
However, the Operator must confirm that the application program uses this key for this function.

CURSOR-POSITIONING KEYS

These keys are used to reposition the cursor to
various positions and in various directions on the
display screen. The proper key or keys to use at
any given time will depend upon the current position and the desired new position of the cursor, as
well as the reason for the change.

rn
rng
g
g

(UP)

(DOWN)

(BACKSPACE)

(RIGHTI

(LEFT)

keys will cause the cursor to wrap, the vertical
positioning keys (UP and DOWN) behave differently from the horizontal positioning keys
(LEFT, RIGHT, and BACKSPACE). Vertical wrap
occurs without any horizontal movement; i.e., the
cursor stays in the same character-position column. Horizontal wrap always involves vertical
movement: if the cursor is repositioned off
screen with the LEFT or BACKSPACE Keys, the
cursor will reappear on the righthand side of the
screen, one line higher than before. If the cursor is
repositioned off screen with the RIGHT Key, the
cursor will reappear on the lefthand side, one line
lower than before. The LEFT and BACKSPACE
Keys function similarly, the only difference being
their location on the keyboard.

Depressing the HOME Key while the AL T FUNC
Key is depressed causes the cursor to be positioned in the first unprotected character position
on the display. The cursor will be positioned to the
first display position on the screen if there are no
fields or if all data is protected.

~~
~

Both the TAB and BACKTAB Keys move the cursor to the first character position in an unprotected input field, the TAB Key moving it forward. If
the cursor is in the indicated character position
(over the number 4), and given that NAME, ORDER
II, and PART II are protected fields, depressing
the TAB Key will move the cursor to the first character pOSition in the next unprotected input field;
i.e., to the character position indicated by the arrow labeled "A." Depressing the BACKTAB Key
will move the cursor backward to the first character position in the present unprotected field; i.e.,
to the character position indicated by the arrow
labeled "B." Had the cursor already occupied the
first character position in an unprotected input
field (Le., the character position indicated by the
arrow labeled "B") depressing the BACKTAB Key
would have moved the cursor backward to the
first character position in the next previous
unprotected input field; i.e., to the character position indicated by the arrow labeled "C."
Depressing the NEW LINE Key always moves the
cursor to the next unprotected character position
which is in a line lower on the screen than the one
in which the cursor is currently displayed. On an
unformatted display screen, this would be the first
character position in the next line.

(TAB)

E )

On a formatted display screen, this would be the
first character pOSition in the first unprotected
field either in the next line, as shown by the arrow
labeled "A," or after several lines, as shown by the
arrow labeled "B." If all character positions on the
display screen are protected, the cursor will return to the first position in the buffer (the upper
leftmost position on the display screen). The NEW
LINE Key is autorepeat.

(BACKTAB)

HOM

(NEWLINE)

II""'"

I
(UNPROTECTED
FIELD)

.........

ONAME

0 (PROTECTED FI ELD)
0 (PROTECTED FIELD)
0, (UNPROTECTED FlELDI

OORDER II
DpART II

(PROTECTED
FIELD)

..........
Using the TAB and BACKTAB Keys to Reposition the Cursor.

B
II""'"

..........

EDITING KEYS

o NAME
These keys are used to edit data which has
already been entered on the display screen. The
Operator will find them useful in correcting mistakes and in altering data.

Gi]

Depressing the INS (insert) MODE Key places the
terminal in the Insert Mode (INS MODE will be
displayed); the mode is exited by depressing the
RESET Key. In this mode, characters can be inserted within data already entered on the display
screen. Suppose that the name entered in the input field for NAME has been incorrectly entered
as A CO, instead of the correct ABC CO.

o NAME

DAlco

The Operator can insert the omitted letters in Insert Mode by first positioning the cursor in the
character position in which the character B
should be inserted, then depressing the B Key.
The display screen will then appear as shown below. Notice that the Space, C, and
characters
have all moved one space to the right. (Had a Null
instead of a Space character been present under
the cursor when the B Key was depressed, the
character B would have been entered without any
lateral shift of the already present letters.)

DABClco

If more than one row of characters is contained
within the field, a character occupying the last
character position in the row is shifted into the
first character position of the row next below. The
editing operation having been completed, the Operator can depress the RESET Key to reenter the
Data Input Mode. In Insert Mode, as in Data Input
Mode, the total number of characters entered into
a field cannot exceed the number provided by the
application program. Any attempt to enter an
excessive number of characters will display the
INPUT INH indicator and inhibit the keyboard.
The function of the DEL (delete) Key is opposite
to that of the INS MODE Key: the DEL Key is used
to delete extraneous characters in an unprotected field. Unlike the INS MODE Key, there is no
Delete Mode. To use the key, the cursor is positioned over an extraneous character and DEL is
depressed. The extraneous character is deleted
and any remaining characters to the right move
one character position to the left. A Null will now
occupy the character position formerly occupied
by the rightmost character. The function of the
DEL Key extends only to the end of the row in
which the cursor is positioned. The function of the
key is graphically illustrated below where the extraneous character (the extra A) is pointed out.

o NAME

oABlco

Now the Operator should insert the character C
into the line. The screen will appear as shown.

o NAME

oAABC

col

The cursor is positioned over the extraneous
character, and the DEL Key is depressed, leaving
the edited result.

o NAME

DAIBc CO

o NAME

oAle

The ERASE EOF (to end of field) Key is used when
it becomes necessary to erase most or all of the
data which has been entered into an input field.
Position the cursor in the first character position
to be erased, depress the ERASE EOF Key, and all
characters previously entered will be erased to
the end of the field. The cursor will not move, enabling the Operator to begin reentering data at
once. If the display is unformatted, it will be
erased to the end of the screen.
The ERASE INPUT Key is used to erase all of the
entered data on the display screen. Depressing
this key will erase all input fields (or the entire
display on an unformatted screen), reduce all
character positions to Nulls, and move the cursor
to the first unprotected buffer position.

PROGRAM ATTENTION KEYS

The Operator uses keys referred to as program
attention keys to signal the application program
that some kind of action is requested. Since these
actions on the part of the application program
must occur before work can continue at the terminal, the depression of these keys will inhibit the
keyboard, display the INPUT INH indicator and
clear the SYS AVAIL (system available) indicator.

~
~
Depressing the CLEAR Key in conjunction with
the ALT FUNC Key-• Erases the display screen and reduces all
character positions to Nulls.
• Repositions the cursor to the first buffer
position (upper leftmost position on the
display screen).

• Signals the application program that the
CLEAR Key has been depressed.
Although most application programs will reply to
the signal by turning off the INPUT INH indicator
(thus allowing the Operator to resume operations), some do not. The Operator must consult
the User's Guide for the program to determine the
correct procedure to follow.

(:J
Depressing the SEL (select) Key activates the
SEL function, which duplicates light-pen operation. A field is selected by positioning the cursor
in a light pen-detectable field and then depressing the SEL Key.

Depressing the TEST REO (Requested) Key in
conjunction with the AL T FUNC Key-• Inhibits the keyboard, displays the INPUT
INH indicator, and clears the SYS AVAIL
indicator.
• Signals the application program that the
TEST REO Key has been depressed.

Normally, this key is used to signal the application
program whenever the Operator suspects that the
terminal is failing. The application program will
transmit a test message that is used to diagnose
trouble. However, the Operator must consult the
User's Guide for the program to determine the
correct procedure to follow.

[_ENTERJ
Depressing the ENTER Key will signal the application program that the data on the display
screen is ready to be entered into the Central
Computer. The keyboard will be inhibited and the
INPUT INH indicator will remain on until the operation is completed by the application program.

• Inhibits the keyboard, displays the INPUT
INH indicator, and clears the SYS AVAIL
indicator.

The keyboard of your terminal
may contain this optional 12key pad. The function of each
PF (program function) Key is
determined by the particular
application program in use.
Therefore, the .operator must
consult the User's Guide for the
program to determine the key
function~.

FIELD

~~~

These are Program Access keys used by the Operator to signal the application program that some
kind of action is requested. Since the kind of action requested depends on the particular application program in use, the Operator must consult
the User's Guide for the program to determine
their functions.

SPECIAL FUNCTION KEYS

The Operator uses these keys to select monocase or dual-case character sets, to enable or
inhibit the keyboard clicker, and to switch from a
normal mode of operation to Diagnostic Mode.

Depressing the Ala Key in conjunction with the
ALT FUNC Key selects mono-case or dual-case
character sets for display data.

Depressing the DIAG (diagnostic) Key in conjunction with the AL T FUNC Key switches the terminal
from a normal mode to Diagnostic Mode. Depressing the DIAG Key while holding down the
ALT FUNC Key again resets the terminal to normal Qperation.

Depressing the CLICK Key enables or inhibits operation of the keyboard clicker. To inhibit the
clicker, the Operator depresses the CLICK Key a
second time.

DATA ENTRY KEYBOARD

The Data Entry Keyboard combines two familiar
keyboards--the standard office typewriter keyboard and the keypunch keyboard. The alphabetic keys are arranged as on the standard office
typewriter, and the keypunch numerals are
arranged as on the keypunch. This arrangement
makes 10 keys both alphabetic and numeric-alphabetic in the normal or Nonshift Mode and
numeric in the Shift Mode. The discussion of the
keyboard is organized according to the functions
of the keys. The key functions of both the Data
Entry Keyboard and the Data Entry Keyboard with
Keypunch Layout are described beginning on the
next page.

~
~
RASE
~
.
INPUT

S
Gi:!
~

The Data Entry Keyboard contains 26 symbols
and punctuation marks, as shown below:

Key

/I
, (Note)
*
. (Note)

$
- (Note)
/

+
=

<
>
I

Sign or Punctuation Mark

at
number
comma
asterisk
period
dollar
minus (or hyphen)
slash
plus
exclamation mark
colon
semicolon
equals
ampersand
less than
greater than
logical OR
logical NOT

Key

Sign or Punctuation Mark

cent
percent
question mark
apostrophe
quotation mark
left parenthesis
right parenthesis

%
?

"
(
)

NOTE
For convenience, three characters are duplicated
in both Nonshift and Shift Modes: comma, period,
and minus sign.

DATA ENTRY KEYBOARD WITH KEYPUNCH LAYOUT

This keyboard has the same keys and features as
those found on the Data Entry Keyboard. However, the key· layout is different, closely resembling the layout of a card punch. The keyboard, a
77 -key version with many autorepeat keys, is
equipped with the EBCDIC character set.

DATA INPUT KEYS

The Operator uses these keys to enter data onto
the display screen in the normal Data Input Mode.

Alphabetic Characters
The keyboard contains the 26 uppercase alphabetic characters. Only uppercase characters
are displayed on the screen and entered into the
Central Computer.

Numeric Characters
Each Data Entry Keyboard contains the 10 numeric characters, arranged in keypunch
style; in addition, the Data Entry
Keyboard has a 10-key numeric pad configured in addingmachine style, making the
method of entering numeric
data optional.

r::::::I~

~~
Since these keys are functionally related, they
will be discussed together. The function keys
familiarly labeled SHIFT and LOCK are labeled
NUMERIC and NUM (numeric) LOCK on the Data
Entry Keyboard. They function as on a standard
office typewriter keyboard: whenever the
NUMERIC Key is held depressed, the character,
symbol, or number on the upper portion of a dualcharacter key is displayed when that key is depressed. If the NUMERIC Key is not depressed,
the character or symbol on the lower portion of
the key is displayed. The keyboard can be locked
in the shift position by depressing the NUM LOCK
Key; the keyboard can be unlocked from the shift
position by depressing the NUMERIC Key again.

Numeric Lock Feature
When equipped with this optional feature the
terminal will automatically shift to Numeric Mode
if the display screen is formatted and the cursor

enters a numeric field. In Numeric Mode, only
thesa keys are operable: the digits 0 through 9,
period, minus sign, and DUP (duplicate). Depressing any other displayable character keys
inhibits the keyboard and displays the INPUT INH
(inhibited) indicator. The Input Inhibited condition
can be reset by depressing the RESET Key. The
Numeric Lock Feature can be overridden if it is
desired to enter other displayable characters into
a numeric field. If the character is located on the
upper portion of a dual-character key, either the
NUMERIC or the NUM LOCK Key is first depressed, then the character key to be entered. If
the character is located on the lower portion of a
dual-character key, the ALPHA Key is first depressed, then the character key to be entered.

FIELD

MARK

The Operator uses this key to mark the end of a
field when the display screen is unformatted. A
semicolon is displayed and the application program is informed that this character represents
the end of a field.

GTJ
~

The ALT FUNC (alternate function) Key serves as
a shift key for the keys directly above it and for
the HOME Key. The ALT FUNC Key enables the
function on the front of these keys.

SpaceBar
The Space Bar functions the same as on a standard office typewriter keyboard except that the
Space character occupies a character position
on the display screen, in the buffer, and in the
transmitted data. For this reason the Space Bar
should not be used to position the cursor; use the
cursor-positioning keys for this purpose. (See below.) The Space Bar is a dual-level autorepeat
key.

This key is used to reset Input Inhibited or Insert
Mode conditions, except that the key is inoperative while the terminal is transmitting or receiving
data.

An Operator frequently processes a series of
documents in which the same data (such as the
date) is entered into a particular field on every
document. The DUP (duplicate) Key is provided to
speed up this sort of entry. Typically, the Operator
enters the data on the first document; on successive documents the DUP Key can be depressed
when the cursor is positioned in the first character position in the appropriate input field. An asterisk will be displayed in the character position, a
tab to the next unprotected character position will
be performed, and the application program informed that a duplicate operation has been requested. However, the Operator must confirm that
the application program uses this key for this
function.

CURSOR-POSITIONINO KEYS

rng
g

(UP)

(DOWN)

(BACKSPACE)

(RIGHT)

(LEFT)

All of these cursor-positioning keys move the cursor one character pOSition at a time. Since all are
autorepeat, they repeat their functions until they
are released, enabling the Operator to reposition
the cursor to a desired line, or character position

in a line, quickly and easily. Although all of the
keys will cause the cursor to wrap, the vertical
positioning keys (UP and DOWN) behave differently from the horizontal positioning keys
(LEFT, RIGHT, and BACKSPACE). Vertical wrap
occurs without any horizontal movement; Le., the
cursor stays in the same character-position column. Horizontal wrap always involves vertical
movement: if the cursor is repositioned off
screen with the LEFT or BACKSPACE Keys, the
cursor reappears on the right hand side of the
screen, one line higher than before. If the cursor is
repositioned off screen with the RIGHT Key, the
cursor reappears on the lefthand side, one line
lower than before. The LEFT and BACKSPACE
Keys function similarly, the only difference being
their location on the keyboard.

S
j

(TABI

(,.. J

(BACKTABI

HOME

(NEWLINEI

These cursor-positioning keys are used to move
the cursor to a new line or to the first character
position in an unprotected input field, making the
operation faster and easier than by moving the
cursor one character position at a time. The figure
below illustrates the use of the TAB and BACKTAB Keys. Both the TAB and the BACKTAB Keys
move the cursor to the first character position in
an unprotected input field, the TAB Key moving
the cursor forward and the BACKTAB Key moving
it backward. If the cursor is in the indicated character position (over the number 4) and NAME,
ORDER 1/ , and PART 1/ are protected fields, depreSSing the TAB Key will move the cursor to the
first character position indicated by the arrow labeled "A." Depressing the BACKTAB Key will

~ABCCO

DNAME
DORDER /1

0123156

DpART /I

D7890l2-A

Depressing the HOME Key while the ALT FUNC
Key is depressed causes the cursor to be positioned in the first unprotected character position
on the display. The cursor will be positioned to the
first display position on the screen if there are no
fields or if all data is protected.

move the cursor backward to the first character
position in the present unprotected field; Le., to
the character position indicated by the arrow labeled "B." Had the cursor already occupied the
first character position in an unprotected input
field (Le., at the character position indicated by
the arrow labeled "B"), depressing the BACKTAB
Key would have moved the cursor backward to
the first character position in the next previous
unprotected input field; Le., to the character position indicated by the arrow labeled "C."

Using the TAB and BACKTAB Keys to Reposition the Cursor.

The SKIP and TAB Keys function similarly, the
only differences being their locations on the
keyboard.
Depressing the NEW LINE Key always moves the
cursor to the next unprotected character position
which is in a line lower on the screen than the one
in which the cursor is currently displayed. On an
unformatted display screen, this would be the first
character position in the next line.
On a formatted display screen, this would be the
first character position in the first unprotected
field either in the next line, as shown by the arrow
labeled "A," or after several lines, as shown by the
arrow labeled "B."

(PROTECTED
FIELD)

o~
/

1
(UNPROTECTED
FIELD)

the cursor when the B Key was depressed, the
character B would have been entered without any
lateral shift of the already present letters.

0
0

(PROTECTED FIELD)

If all of the remaining character positions on the
display screen are protected, the cursor will return to the' first position in the buffer (the upper
leftmost position on the display screen). The NEW
LINE Key is autorepeat.

EDITING KEYS

These keys are used to edit data that has already
been entered on the display screen. The Operator
will find these keys useful in correcting mistakes
and in altering data.

NS ~EL
~
MODE

DAB Ico

(UNPROTECTED FIELD)

....

o NAME

(PROTECTED FIELD)

ERASE
INPUT

Now the Operator should insert the character C
into the line. If more than one row of characters is
contained within the field, a character occupying
the last character position in the row is shifted
into the first character position of the row next
below. The editing operation having been completed, the Operator can depress the RESET Key
to reenter the Data Input Mode. In Insert Mode, as
in Data Input Mode, the total number of characters entered into a field cannot exceed the number provided by the application program. Any
attempt to enter an excessive number of characters will display INPUT INH and inhibit the
keyboard.

o NAME

oABClco

ERASE
EOF

A .•

Depressing the INS (insert) MODE Key places the
terminal in the Insert Mode. (The INS MODE indicator will be displayed,) The mode is exited by
depressing the RESET Key. In this mode, characters can be inserted within data already entered
on the display screen. Suppose that the name
entered in the input field for NAME had been incorrectly entered as A CO instead of the correct
ABC CO. The Operator can insert the omitted letters in Insert Mode by first positioning the cursor
in the character position in which the character B
should be inserted, then depressing the B Key.

o NAME

The function of the DEL (delete) Key is opposite
to that of the INS MODE Key; the DEL Key is used
to delete extraneous characters in an unprotected field. Unlike the INS MODE Key, there is no
Delete Mode. To use the key, the cursor is positioned over an extraneous character and DEL is
depressed. The extraneous character is deleted
and any remaining characters to the right move
one character position to the left. A Null will now
occupy the character position formerly occupied
by the rightmost character. The function of the
DEL Key extends only to the end of the row in
which the cursor is positioned. The function of the
key is graphically illustrated below where the extraneous character (the extra A) is pointed out.

o NAME
,Notice that the Space, C, and 0 characters have
all moved one space to the right. (Had a Null instead of a space character been present under

oAABC
~

col

The cursor is positioned over the extraneous
character.

o NAME

screen and reduces all character positions to Nulls.
•

Repositions the cursor to the first buffer pOSition (upper leftmost pOSition on
the display screen).

•

Inhibits the keyboard, displays the
INPUT INH indicator, and clears the
SYS AVAIL indicator.

•

Signals the application program that
the CLEAR Key has been depressed.

DAIBe eo

The DEL Key is depressed, leaving the edited
result.

oAle

o NAME

The ERASE EOF (to end of file) Key is used when
it becomes necessary to erase most or all of the
data which has been entered into an input field.
Position the cursor in the first character position
to be erased and depress the ERASE EOF
Key: all characters previously entered will be
erased to the end of the field. The cursor will not
move, enabling the Operator to begin reentering
data at once.
The ERASE INPUT Key is used to erase all of the
entered data on the display screen. Depressing
this key will erase all input fields (or the entire
display on an unformatted screen), reduce all
character positions to Nulls, and move the cursor
to the first unprotected buffer position.

Although most application programs will reply to
the signal by turning off the INPUT INH indicator
(thus allowing the Operator to resume operations), some do not. The Operator must consult
the User's Guide for the program to determine the
correct procedure to follow.

r::I
~

Depressing the SEL (select) Key activates the
SEL function, which duplicates light-pen operation. A field is selected by positioning the cursor
in a light-pen-detectable field and then depressing the SEL Key

Depressing the TEST REO (requested) Key in
conjunction with the ALT FUNC Key-•

Inhibits the keyboard, displays the
INPUT INH indicator, and clears the
SYS AVAIL indicator.

•

Signals the application program that
the TEST REO Key has been
depressed.

PROGRAM ATTENTION KEYS

The Operator uses these keys to signal the application program that some kind of action is requested. Since these actions on the part of the
application program must occur before work can
continue at the terminal, the depression of these
keys will inhibit the keyboard, display the INPUT
INH indicator and clear the SYS AVAIL (system
available) indicator.

r::I

~
Depressing the CLEAR Key

in conjunction with

the ALT FUNC Key-•

Erases all entered data on the display

~gg
These are program access keys used by the Operator to Signal the application program that some

kind of action is requested. Since the kind of action requested depends on the particular program
in use, the Operator must consult the User's
Guide for the program to determine their
functions.

Depressing the CLICK Key enables or inhibits operation of the keyboard clicker. To inhibit the
clicker, the Operator depresses the CLICK Key a
second ti me.

Depressing the ENTER Key signals the application program that the data on the display screen is
ready to be entered into the Central Computer.
The keyboard will be inhibited and the INPUT INH
indicator will remain on until the operation is completed by the application program.

~~ggg
The function of each PF (program function) Key is
determined by the particular application program
in use. Therefore, the Operator must consult the
User's Guide for the program to determine their
functions.

SPECIAL FUNCTION KEYS

The Operator uses these keys in conjunction with
the ALT FUNC (alternate function) Key to select
mono-case or dual-case character sets, enable or
inhibit the keyboard clicker and to switch from a
normal mode of operation to Diagnostic Mode.

Depressing the Ala Key in conjunction with the
ALT FUNC Key selects mono-case or dual-case
character sets for display data.

Depressing the DIAG Key in conjunction with the
AL T FUNC Key switches the terminal from a normal mode to Diagnostic Mode. Depressing the
DIAG Key while holding down the AL T FUNC Key
again resets the terminal to normal operation.

OPERATOR CONSOLE KEYBOARD
The Operator Console Keyboard is similar to the
operator consoles used with IBM System/360
and System/370 computers. Most of the keys are
in the same location and perform the same functions. The discussion of the keyboard is organized according to the functions of the keys.

The Operator Console Keyboard contains 25
symbols and punctuation marks as listed below:

Key

<
%

*
(
)

+
&
@
,I

"
1/

-.
?
I

Sign or Punctuation Mark

equals
less than
semicolon
colon
percent
apostrophe
greater than
asterisk
left parenthesis
right parenthesis
underscore
minus or hyphen
plus
ampersand
at
exclamation mark
dollar
quotation mark
number
logical OR
comma
logical NOT
period
question mark
slash

DATA INPUT KEYS

The Operator uses these keys to enter data onto
the display screen in the normal Data Input Mode.

Alphabetic Characters

The keyboard contains 26 characters. Both uppercase and lowercase alphabetic characters
can be entered into the buffer, transmitted to the
Central Computer, and displayed on the screen.

Numeric Characters

The keyboard contains the 10 numeric characters, arranged in the configuration of the standard
office typewriter keyboard.

Space Bar

The Space Bar functions the same as on a standard office typewriter keyboard except that the
Space character occupies a character position
on the display screen in the buffer and in the
transmitted data. For this reason the Space Bar
should not be used to position the cursor; use the
cursor-positioning keys. The Space Bar is
autorepeat.

(RE~~
This key is used to reset Input Inhibited or Insert
Mode conditions except that the key is inoperative while the terminal is transmitting or receiving
data.

[;T]
SHIFT and LOCK

The SHIFT and LOCK Keys function exactly as on
a standard office typewriter keyboard: whenever
the SHIFT Key is held depressed, the character or
symbol on the upper portion of a dual-character
key is displayed when that key is depressed. If
the SHIFT Key is not depressed, the character or
symbol on the lower portion of the key is displayed. The keyboard can be locked in the shift
position by depressing the LOCK Key; the keyboard can be unlocked from the shift position by
depressing the SHIFT Key again.

Numeric Lock Feature

When equipped with this optional feature, the
terminal automatically shifts to Numeric Mode if
the display screen is formatted and the cursor
enters a numeric field. In Numeric Mode only
these keys can enter data: the digits 0 through 9,
period, minus sign, and DUP (when the SHIFT or
LOCK Key is also depressed). Depressing any
other key in Numeric Mode will inhibit the keyboard and display the INPUT INH (inhibited) indicator. The Input Inhibited condition can be reset
by depressing the RESET Key. No provision is
made to override this feature and allow entry of
alphabetic characters into a protected numeric
field.

The ALT FUNC (alternate function) Key functions
as a shift key for the keys directly above it and the
HOME Key. The ALT FUNC Key enables the function on the front of these keys.

CURSOR-POSITIONINO KEYS

These keys are used to reposition the cursor to
various pOSitions and in various directions on the
display screen. The proper key or keys to use at
any given time will depend upon the current position and the desired new pOSition of the cursor, as
well as the reason for the change.

rn
rn
~..

(~J

(. J

(UP)

(DOWN)

(BACKSPACE)

(RIGHn

(LEFT)

All of these cursor-positioning keys move the cursor one character position at a time. Since all are
autorepeat, they repeat their functions until they
are released, enabling the Operator to reposition
the cursor to a desired line, or character position
in a line, quickly and easily. Although all of the
keys will cause the cursor to wrap, the vertical
positioning keys (UP and DOWN) behave differently from the horizontal positioning keys
(LEFT, RIGHT and BACKSPACE). Vertical wrap
occurs without any horizontal movement; Le., the
cursor stays in the same character-position column. Horizontal wrap always involves vertical
movement: if the cursor is repositioned offscreen with the LEFT or BACKSPACE Keys, the
cursor reappears on the righthand side of the
screen, one line higher than before. If the cursor is
repositioned off screen with the RIGHT Key, the
cursor reappears on the lefthand side, one line
lower than before. The LEFT and BACKSPACE
Keys function similarly, the only difference being
their location on the keyboard.

forward and the BACKTAB Key moving it
backward. If the cursor is in the indicated character position (over the number 4 ), and NAME,
ORDER II, and PART II are protected fields, depressing the TAB Key will move the cursor to the
first character position in the next unprotected
input field; Le., to the character position indicated
by the arrow labeled "A." Depressing the BACKTAB Key will move the cursor backward to the
first character position in the present unprotected
input field; i.e., to the character position indicated
by the arrow labeled liB." Had the cursor already
occupied the first character position in an unprotected input field (Le., at the character position
indicated by the arrow labeled "B") , depressing
the BACKTAB Key would have moved the cursor
backward to the first character position in the
next previous unprotected input field; Le., to the
character position indicated by the arrow labeled

lie."

~ABCCO

DNAME

Depressing the HOME Key while the ALT FUNC
(alternate function) Key is depressed causes the
cursor to be positioned in the first unprotected
character position on the display. The cursor will
be positioned to the first display position on the
screen if there are no fields or if all data is
protected.

(TAB)

(I- J

(BACKTAB)

HOME

0123156

DpART 1/

D789012-A

A/
Using the TAB and BACKTAB Keys to Reposition the Cursor.

Depressing the NEW LINE Key always moves the
cursor to the next unprotected character position
in a line lower on the screen than the one which
the cursor is currently occupying. On an unformatted display screen, this would be the first
. character position in the next line. On a formatted
display screen, this would be the first character
position in the first unprotected field either in the
next line, as shown by the arrow labeled "A," or

(NEWLINE)

OORDER fJ

(PROTECTED
FIELD)

o~
,/

1
(UNPROTECTED
FIELD)

after several lines, as shown by the arrow labeled

o (PROTECTED FIELD)

o
o

character been present under the cursor when
the B Key was depressed, the character B would
have been entered without any lateral shift of the
already present letter.)

(PROTECTED FIELD)

o NAME

(UNPROTECTED FIELD)

DABlco

If all character positions on the display screen are
protected, the cursor will return to the first position in the buffer (the upper leftmost position on
the display screen). The NEW LINE Key is
autorepeat.

EDITING KEYS

These keys are used to edit data which has
already been entered on the display screen. The
Operator will find these keys useful in correcting
mistakes and in altering data.

~MODEINS~ ~EL

ERASE
EOF
DIAG

ERASE
INPUT
.a

Depressing the INS MODE Key places the terminal in the Insert Mode. (The INS MODE indicator
will come on.) The mode is exited by depressing
the RESET Key. In this mode, characters can be
inserted within data already entered on the display screen. Suppose that the name entered in
the input field for NAME had been incorrectly entered as A CO, instead of the correct ABC CO. The
Operator can insert the omitted letters in Insert
Mode by first positioning the cursor in the character position in which the character B should be
inserted,

o NAME

DAlco

Now the Operator should insert the character C
into the line, the result appearing as shown below.

o NAME

If more than one row of characters is contained
within the field, a character occupying the last
character position in the row is shifted into the
first character positon of the row next below. The
editing operation having been completed, the Operator can depress the RESET Key to reenter the
Data Input Mode. In Insert Mode, as in Data Input
Mode, the total number of characters entered into
a field cannot exceed the number provided by the
application program. An attempt to enter an
excessive number of characters will turn on the
INPUT INH indicator and inhibit the keyboard.
The function of the DEL (delete) Key is opposite
to that of the INS MODE Key: the DEL Key is used
to delete extraneous characters in an unprotected field. Unlike the INS MODE Key, there is no
Delete Mode. To use the key, the cursor is positioned over an extraneous character and DEL is
depressed. The extraneous character is deleted,
and any remaining characters to the right will
move one character position to the left. A Null will
now occupy the character position formerly occupied by the rightmost character. The function of
the DEL Key extends only to the end of the row in
which the cursor is positioned. The function of the
key is graphically illustrated below, where the extraneous character (the extra A) is pOinted out.

o NAME
then depressing the B Key. The display screen
will then appear as shown below. Notice that the
Space, C, and 0 characters have all moved one
space to the right. (Had a Null instead of a Space

[J ABC Ico

oAABC
~

col

The cursor is positioned over the extraneous
character.

o NAME

•

Erases the display screen and reduces
all character positions to Nulls.

•

Repositions the cursor to the first buffer position (upper leftmost position on
the display screen).

•

Inhibits the keyboard, displays the
INPUT INH indicator, and clears the
SYSAVAIL indicator.

•

Signals the application program that
the CLEAR Key has been depressed.

DAise eo

The DEL Key is depressed, leaving the edited
result.

o NAME
.....

oAle co

.....

The ERASE EOF (to end of field) Key is used when
it becomes necessary to erase most or all of the
data that has been entered into an input field.
Position the cursor in the first character position
that is to be erased, depress the ERASE EOF Key,
and all characters previously entered will be
erased to the end of the field. The cursor will not
move, thus enabling the Operator to begin reentering data immediately. If the display is unformatted, it will be erased to the end of the screen.
The ERASE INPUT Key is used to erase all of the
entered data on the display screen. Depressing
this key will erase all input field~ (or the entire
display on an unformatted screen), reduce all
character positions to Nulls, and move the cursor
to the first unprotected buffer position.

~
~
Depressing the SEL Key activates the SEL function, which duplicates light-pen operation. A field
is selected by positioning the cursor in a lightpen-detectable field and then depreSSing the SEL
Key.

Depressing the TEST REO (requested) Key in
conjunction with the ALT FUNC Key--

PROGRAM ATTENTION KEYS

~
~
DepreSSing the CLEAR Key in conjunction with
the ALT FUNC Key--

•

Inhibits the keyboard, displays the
INPUT INH indicator, and turns off the
SYS AVAIL indicator.
.

•

Signals the application program that
the TEST REO Key has been
depressed.

Depressing the CNCL Key signals the application
program that the key has been depressed. Although the application program typically clears
the input field in which the cursor is positioned
and repositions the cursor to the first character
position in the input field, the Operator must consult the User's Guide for the program to determine
the correct procedure to follow.

This is a program access key used by the Operator to signal the application program that some
sort of action is requested. Since the kind of action requested depends on the particular program
in use, the Operator must consult the User's
Guide for the program to determine its function.

Depressing the Ala Key in conjunction with the
ALT FUNC Key selects mono-case or dual-case
character sets for display data.

Depressing the DIAG (diagnostic) Key in conjunction with the AL T FUNC Key switches the terminal
from a normal mode to Diagnostic Mode. Depressing the DIAG Key while holding down the
AL T FUNC Key again resets the terminal to normal operation.

Depressing the CLICK Key enables or inhibits operation of the keyboard clicker. To inhibit the
clicker, the Operator depresses the CLICK Key a
second time.
.

Depressing the ENTER Key signals the application program that the data on the display screen is
ready to be entered into the Central Computer.
The keyboard will be inhibited, and the INPUT INH
indicator will remain on until the operation is completed by the application program.

The function of each PF
(program function) Key is determined by the particular application program in use. Therefore,
the Operator must consult the
User's Guide for the program to
determine their functions.

SPECIAL FUNCTION KEYS

The Operator uses these keys to select monocase or dual-case character sets, to enable or
inhibit the keyboard clicker, and to switch from a
normal mode of operation to Diagnostic Mode.

OPERATING PROCEDURES

The previous sections of the manual should give
the Operator the basic knowledge necessary to
operate the display screen controls and the keyboard. The Operator will find it necessary to integrate these instructions with the User's Guide for
the application program used by the local office.
Since application programs and User's Guides
vary, only generalized instructions can be given
here. This section describes the normal data input procedures.

SIGNING ON. In some locations the Operator
must use certain procedures to "sign on;" that is,
signal the application program that the display
terminal will be entering data.

STARTING TO WORK. The Operator will signal
the application program when ready to process
data (perhaps by depressing one of the program
access keys, which will cause a formatted display
or a message to appear on the display screen).
The Operator will enter data from a source document into the input fields, then signal the application program (by depressing the ENTER Key) that
data on the display screen is ready to be entered
into the Central Computer. After the data has
been sucessfully transmitted to the Central
Computer, the application program will erase the
input fields, and the display screen will again be
available for data entry from another source
document.

The following instructions describe the. step-bystep operation of the terminal for normal data input procedures. The Operator should perform the
operations, in sequence, as described.

•

Pull Power ON-OFF Switch to the ON position. If the optional Security Lock is in the ON
position, the INPUT INH (inhibited) message indicator will be displayed on the screen
after a short warm-up period.
Remarks: After the warm-up period, the cursor should appear in the first character position in the buffer (upper leftmost position on the display screen).

•

Turn optional Security Lock to the OFF position. The INPUT INH message indicator will
!>e extinguished.

•

Adjust display brightness as required.
Remarks: This control is part of the Power ON-OFF Switch. Turn the knob counterclockwise to make the image dimmer, clockwise to make it brighter.

•

Adjust display contrast as required.
Remarks: This control is part of the Power ON-OFF Switch. Adjust the contrast
of the viewed image by turning the knob at the rear of the switch.

•

Sign on, if required.
Remarks: Follow the sign-on procedure given in the User's Guide for the application program.

•

Signal the application program when ready to go to work.
Remarks: Follow the procedure given in the User's Guide--usually, one of the
program attention (PA) keys is employed. If the program utilizes a format, the
format will subsequently appear on the display screen.

•

Enter data from a source document. There is no indicator light to indicate Data Input
Mode.

•

Edit data when characters are not inserted or excess characters are not deleted, as
required.
Remarks: For simple replacement of characters (such as correcting a misspelled word), position the cursor over the character to be replaced and depress
the key for the correct character. The correct character will replace the incorrect
one.

•

Edit data by deleting excess characters, as required.
Remarks: To correct misspelled words by deleting excess characters, position
the cursor over an extraneous character and depress the DEL (delete) Key. The
extraneous character will be deleted, and any remaining characters to the right
will move one character position to the left. The function of the DEL Key extends
only to the end of the row (or field) in which the cursor is positioned.

•

Edit data by inserting new characters as required. Before insertion of new characters,
depress INS (insert) MODE Key. INS MODE will be displayed on the screen.
Remarks: Position the cursor over the character position in which the omitted
character is to be inserted. Depress the key for the character to be inserted. The
character will be inserted, and all characters formerly under and to the right of the
cursor will move one character position to the right. When editing has been
completed, depress the RESET Key to place the terminal back in Data Input Mode.

•

Edit data by erasing when required.
Remarks:

•

Erasing may be accomplished in three ways:

•

When only a single field or part of a field needs to be erased, place the cursor
over the first character position to be erased and depress the ERASE EOF (to
end of field) Key. All characters to the end of the field will be erased, but the
cursor will not move; data may be reentered immediately by the Operator.

•

Depress the ERASE INPUT Key when all data entered from the display
screen is to be erased. All data previously entered by the Operator will be
erased, and the cursor will move to the first unprotected buffer position
(upperleft character position).

•

Depress the CLEAR Key while holding down the ALT FUNC (alternate function) Key when the entire display is to be erased. The display screen will be
erased, and the cursor will move to the first buffer position.

The keyboard is disabled when the following conditions exist:
Remarks: When the keyboard is disabled, most keys on the keyboard (including
all of the alphameric characters and the symbols) are inactive.

•

The terminal Is executing a command sent by the application program. The
INPUT INH message indicator will be displayed.
Operator action required: None. The indicator will be turned off by the
application program after completion of the operation.

•

An operation initiated by a Program Attention (PA) Key is in progress. Th(t
INPUT INH message indicator will be displayed. The SYS AVAIL (system
available) message indicator will be extinguished.
Operator action required: None. The INPUT INH message indicator
will be extinguished by the application program after completion of the
operation.

•

The optional Numeric Lock Feature is installed on a terminal equipped with a
Data Entry Keyboard and the Operator depresses a key other than the numerics plus the period, minus sign, and DUP Key without also depressing
either the ALPHA or NUMERIC Keys when the cursor is in a numeric field.
The INPUT INH message indicator will be displayed on the screen.
Operator action required: Depress the RESET Key. The optional NumericLock Feature can be overridden by depressing the NUMERIC Key
to enter uppercase shift characters, or the ALPHA Key, to enter lowercase downshift characters.

•

The optional Numeric Lock Feature is installed on a terminal equipped with a
Typewriter, Check Processing, or Operator Console Keyboard and the Op-

erator depresses a key other than the numerics plus the period, minus sign,
and DUP Key when entering data in a numeric field. The INPUT INH message
indicator will be displayed on the screen.
Operator action required: Depress the RESET Key. No provision has
been made to override the optional Numeric Lock Feature on Typewriter, Check Processing, and Operator Console Keyboards.
•

The Operator depresses any alphameric key, the DUP Key, the FIELD MARK
Key, the ERASE EOF Key, or the DEL Key while the cursor is in a protected
field or over an attribute character. The INPUT INH message indicator will be
displayed on the screen.
Operator action required:

•

The optional Security Lock is in the ON position. The INPUT INH message
indicator will be displayed on the screen.
Operator action required:

•

Depress the RESET Key.

The Operator has depressed the SEL Key and the cursor is not located in a
valid Light Pen Field. The keyboard will be inhibited and the INPUT INH
indicator will be displayed.
Operator action required:

•

Turn the Security Lock to the OFF position.

The Operator has depressed the data entry keys faster than the terminal can
perform the operations (a rare occurrence). The INPUT INH message indicator will be displayed on the screen.
Operator action required:

•

Depress the RESET Key.

The Audible Alarm sounds when the following conditions exist:
•

The cursor enters the next-to-Iast character position on the display screen.
Remarks: This is a signal to the Operator that the cursor is about to
wrap. Subsequently entered data will replace any data already
displayed.

•

The application program has been programmed to initiate an alarm.
Remarks:
Guide.

•

The reason for the alarm will be explained in the User's

Depressing the ENTER Key will signal the application program that the data displayed
on the display screen is ready to be entered into the Central Computer. The INPUT INH
message indicator will be displayed. The SYS AVAIL message indicator will be extinguished but will be displayed again after the data on the display screen has been
transmitted to the Central Computer.
Remarks: When the SYS AVAIL message indicator is displayed, the Central
Computer is available to accept an Operator-initiated transmission.

MAINTENANCE
GENERAL
By exercising normal care and a common sense
approach to maintenance, the Operator can do a
better job and help minimize downtime and service calls.

CLEANING

The terminal cover may be cleaned as required
with a damp cloth and wiped dry. The display
screen may require cleaning periodically. Clean
the display only with glass cleaner.

OPERATING ENVIRONMENT

The display terminal is designed to operate in a
temperature range of +50°F to +95°F. Since the
electronic circuits are convection-cooled, the
areas around the bottom of the terminal case and
the top panel should be left clear. Both the power
cable and the data communication cable should
be protected from damage due to impact and pedestrian traffic.

TROUBLE WITH THE TERMINAL

GENERAL

DIAGNOSTIC TESTS

Since the terminal contains many mechanical and
electronic components, it is possible that malfunctions can occur. Some of these can be remedied (or even prevented) by the Operator, while
others require the services of a TTC Field Engineer. Some potential problem areas as. well as
some helpful suggestions are described in the
text below.

Diagnostic tests are provided on two levels-power-on and Operator-initiated. Power-on tests
verify all functions which can be tested without
Operator intervention and are performed each
time the terminal Power Switch is pulled ON. The
Operator-initiated diagnostic tests are provided
to allow the Operator to differentiate between
system failures and operational or procedural
problems. These tests are designed to provide
Operator confidence in terminal operation.

NO POWER
POWER-ON DIAGNOSTIC TESTS

If the cursor does not appear after a short warmup period when the Power Switch is pulled on, the
Operator can-• Check the power-cord plug to see if it is
firmly plugged into its receptacle.
• Verify that power is available at the
receptacle.
• Push the Power Switch to the OFF position, wait five seconds, and then pull it
back to the ON position.

The power-on tests are the Cyclic Redundancy
Check (CRC), Video RAM (VRAM), and Control
RAM (CRAM). The results of these tests are displayed at the bottom of the screen in the diagnostic message field of the status line. The Operator
should observe the status line after power-on for
any fail-test result messages for these tests and
notify the supervisor of any failures.
The fail test messages are CRC X, VRAM X, and
CRAM X.

If these efforts fail to restore service, see
SERVICE CALLS.
OPERATOR-INITIATED DIAGNOSTIC TESTS

REQUEST FOR TEST

Every display terminal is equipped with a TEST
REO (request) Key, although not all application
programs are equipped with the software that enables the test procedures. The Request for Test
(RFT) Procedure is designed to send a test pattern to a display terminal as a service aid whenever the Operator suspects that the terminal is
not operating correctly. The Operator must consult the User's Guide for the application program
to determine the correct procedure to follow.

The Operator may be expected to initiate the
diagnostic tests when a malfunction has been
observed or suspected or when requested by an
off-site Field Engineer. The test results' may Isolate malfunctions which are Operator-detectable,
or the Operator can communicate the results to
the Field Engineer for off-site diagnosis. The
diagnostics are designed to reduce downtime
and increase Operator use of the TC 277C/D.
The Operator-initiated diagnostic tests are described below and step-by-step instructions are
provided for each test. The Operator should select the appropriate tesUs) and perform the
procedures which follow, as required, to Isolate

observed or suspected malfunctions. Before initiating a test the Operator should-• Set the Power ON-OFF Switch to ON.
• Depress the DIAG (diagnostic) Key while
holding down the AL T FUNC (alternate
function) Key. This puts the terminal in the
Diagnostic Mode.
• Observe that the letter D is displayed and
the cursor positioned to the right and
adjacent to it. The letter D will start to
blink after the selected test has been initialized, indicating that the test is in
progress.
After the test(s) is performed, the Operator depresses the DIAG Key while holding down the AL T
FUNC Key to return to normal operation.

Display Attributes Test

This test permits the Operator to view attribute
characters (normally not visible) which are stored
in the video buffer. Follow the steps below:
• Type the numeric character Test Code
"03."
• Depress the ENTER Key.
• Observe that DISP A TTR (display attributes) is displayed in the Diagnostic
Message Field. ( If an error is made in selecting a test, the entry can be corrected
by depressing the RESET Key and typing
in the correct code. If an undefined test is
selected and the ENTER Key is depressed, INVALID will be displayed in the
Diagnostic Message Field.)
• Depress the ENTER Key several times
and observe that the mode will toggle from
Attribute Display to Nondisplay and vice
versa. Cursorlike displays will highlight
attributes, but the true cursor is positioned on the status line.
• Depress the RESET Key. This terminates
the test and re-initializes the terminal for
test selection.

NOTE

If the Attribute Display Mode is not reset prior to
test termination, attributes will continue to be
highlighted. (The position of the true cursor can
be determined by depressing any cursor-positioning key.) This mode of operation is intended to
aid while operating in on-line mode by highlightIng attribute positions.
Pattern (PAT) Test

The Pattern Test provides the Operator with the
capability to format the video buffer by inserting
and deleting attributes and compOSing fields.
When this test is selected (Test Code "04" entered), current attributes will be disabled: attribute characters will not be protected and the
Operator will be able to type in protected fields;
data in nondisplay fields will be visible; intensified
data will be unintensified; etc. All current nondisplay data will be erased when this test is selected
to prevent display of secure information. Each attribute character is mapped into a data character
and displayed in a reverse video block for easy
identification. The true cursor is repositioned to
the first display position on the video screen and
PA T is displayed in the Diagnostic Message Field.
Perform the following steps:
• Type in the numeric character Test Code
"04."
• Depress the ENTER Key.
• Position the true cursor to the desired
location using the cursor control keys.
• Specify attributes using the alphameric
keys and enter the data.
• Depress the ENTER Key to change the
character that precedes the cursor from a
data character to an attribute character.
• Depress the RESET Key to terminate the
PAT Test and reinitialize the Selection
Field for test selection. Attribute characters will be enabled, protected, and not
visible; data in nondisplay fields will not
be visible; intensified data will be re-intensified, etc.
• Exit Diagnostic Mode to test normal keyboard functions.

Alarm/Indicator Test
The Alarm/Indicator Test allows the Operator to
verify that the Audible Alarm and SYS AVAIL, INS
MODE, and INPUT INH message indicators can be
activated. Perform the following steps:

• Pass the test card through the card
reader. The test results are displayed in
the Diagnostic Message Field and are interpreted as follows:

Message

Meaning

OICR

Insertion of the test card was not
detected (if card was passed
through the card reader).

• Observe that ALARMIINDC (indicators) is
displayed in the Diagnostic Message Field
to indicate that the test is in progress.

NOSOR

Card insertion was detected but a
start-of-record (SOR) character
was not detected.

• Depress the ENTER Key again and observe that SYS AVAIL, INS MODE, and
INPUT INH are displayed on the status line
and the Audible Alarm (if installed) is
turned on. (Messages are displayed and
Alarm sounds for approximately one
second.)

DATA OK

All characters decoded correctly.

DATA X

Card was read but data characters after the SOR were not decoded correctly.

• Type in the numeric character Test Code
"05."
• Depress the ENTER Key.

• Depress the RESET Key to terminate the
test.

Operator Identification Card Reader
(OICR)/Llght Pen (Selector Pen) Test
The OICR/LP Test is used to verify proper operation of the OICR and Light Pen (Selector Pen)
when the terminal is equipped with these optional
devices. When this test is initialized, OICRILP is
displayed in the Diagnostic Message Field. A light
pen selection field will be displayed and designated by the mnemonic LP SEL; the remainder
of the screen will be blank.
OICR TEST. This test compares data read from
the OICR test card against matching data stored
in ROM. Data is not stored in the video buffer for
this test and the cursor is not moved. Perform the
following steps:
• Type in the numeric character Test Code
"06."
• Depress the ENTER Key.
• Observe that OICRILP is displayed in the
Diagnostic Message Field to indicate that
the test is in progress.

• Depress the RESET Key to terminate the
test, clear the video buffer to null characters, and re-initialize the Selection Field
for test selection.

LIGHT PEN (SELECTOR PEN) TEST. Operation
of the Light Pen Test must be visually verified by
the Operator. The Light Pen Field is provided for
this purpose. Perform the following procedures.
Successful completion of these procedures indicates that the Light Pen and associated interface
circuitry are functioning properly.
• Press the tip of the Light Pen against a flat
surface. Verify that a solid line is displayed through all visible characters on
the row designated by LP SEL. The solid
line should not be displayed on any other
row.
• Position the Light Pen over any visible
character in the row designated by LP
SEL . Press the tip of the pen against the
screen and verify that the solid line is
momentarily displayed (on the same line
up to the pen position) and then is extinguished. Be sure the designator character
changes from a (?) to a ( »).
• Position the Light Pen over any C in the
row below the Light Pen Field. Press the

pen against the CRT and verify that a selection is not made; i.e., the designator
character does not change and the solid
line is not extinguished until the pen is
released.
• Again position the Light Pen over a visible
character in the LP SEL row, press the tip
against the screen, and verify that the (
reverts to a (?).

• Depress the RESET Key to terminate the
test, clear the video buffer to null characters, and re-initialize the Selection Field
for test selection.

Key/Switch Test

The Key/Switch Test is used to monitor keyboard
data input to the system and switch able inputs
used to configure the terminal for features and
keyboard types.
• Type in the numeric character Test Code
"08."
• Depress the ENTER Key.
• Depress each key and verify that when a
key is depressed an asterisk and the appropriate hexadecimal two-digit code
(*XX) are displayed in the Diagnostic
Message Field. (See the following illustration.) When a key is released, a space replaces the asterisk.
• Depress the RESET Key and note that *4C
is displayed. Releasing the key will terminate the test and re-initialize the Selection Field for test selection.
The switches used to configure the terminal features (keyboard type, function pad, etc.) are constantly monitored as part of the Key/Switch Test
with the data displayed in the Diagnostic Message Field. If a change in a switch setting is detected, the test will be automatically terminated
and an error message displayed adjacent to the
switchable input data. If an error is detected, the
switchable input data will specify the setting of
the switches when the error was detected.

03
04

40
4C

28 1 2912A 1 28

37
44

38
45

20
3A

39
46

22
2F

3C
49

Hexadecimal Key ISwitch Codes.

48
4E

Screen Alignment Test

The Screen Alignment Test fills the video buffer
with the E character to facilitate alignment and
focusing of the CRT.
• Type in the numeric character Test Code
"07."
• Depress the ENTER Key.
• Adjust the display screen contrast by
turning the contrast control on the Power
ON-OFF Switch.
• Depress the RESET Key to terminate the
test, clear the video buffer to null characters and re-i'nitialize the Selection Field
for test selection.

• Depress the RESET Key. The test will be
terminated and VRAM will be displayed in
the Diagnostic Message Field. The buffer
will be cleared to all null characters, and
the test results displayed in the Diagnostic Message Field. The Selection Field will
be re-initialized for selection of another
test.
Control RAM (CRAM) Test
This tests the locations in the control RAM and is
Similar to the VRAM test except that no pattern is
displayed on the display screen.
• Type in the numeric character Test Code
"02."
• Depress the ENTER Key.

Video RAM (VRAM) Test
A checkerboard RAM test is performed on the
video buffer which causes a full display screen of
test data to be displayed. Pf:'!"'form the following
procedure:
• Type in the numeric character Test Code
"01."

• Observe that CRAM is displayed in the
Diagnostic Message Field. If an error is
detected as part of the test, CRAM X is
displayed. If no errors are detected, the
test will run repeatedly.
• Depress the RESET Key. This terminates
the test and re-initializes the Selection
Field for test selection.

• Depress the ENTER Key.
Cyclic Redundancy Check (CRC) Test
• Observe that the test results are displayed in the Diagnostic Message Field
when an error is detected. The results of
the test are interpreted as follows:
VRAM

1 (76543210)
Designates bit positions
in RAM byte. An X in a
bit position indicates an
error was detected for
that bit.

Used to distinguish
I-.._ _ _ _ _ between the first (1)
and second (2) K byte of
VRAM.

1-.._ _ _ _ _ _ _

Name of Test. Displayed
by itself when test is
terminated by RESET
Key without an error.

The CRC Test performs a check on all firmware
locations by computing a CRC value for each
ROM/PROM and comparing the computed value
with the correct value. Perform the following
steps:
• Type in the numeric character Test Code
"00."
• Depress the ENTER Key.
The results of the test are displayed in the Diagnostic Message Field and are interpreted as
follows:

CRC

00011 00/200/300/400ITCPQ

Gndicates a special program is installed. TCPQ will not
be displayed for standard program.

1 . -_ _ _ _ _ _ _

Delimiter separating status for different ROM's.

A two-digit number which represents the Revision Level
· I . - - - - - - - - -of the ROM.
Identifies ROM/PROM position. ROM positions are

L..-_...,......_______ identified by the numbers 0 through 4. An X in this position indicates module failed CRC test.
I . - - - - - - - - - - - - N a m e of test.

• Depress the RESET Key to terminate the
test. The test will run repeatedly until
terminated. Depressing the RESET Key
freezes the results in the Diagnostic Message Field and re-initlalizes the Selection
Field for test selection.

SERVICE CALLS

The office in which your terminal is located will
have established operating procedures to deal
with equipment malfunction. In most cases, you
will have been instructed whom to notify in case
of specific malfunction--either your own Central
Computer Office or a TTC Field Engineering
Dispatcher. (Choose the appropriate toll-free
telephone number for your location.)
• Northern U.S., 1-800-331 -741 0
• Southern U.S., 1-800:..331-7435
• Oklahoma, 1-800-722-2740
When placing service calls, be sure to give the
dispatcher the following information:
• Customer name and location.
• Telephone number and name of person to
contact.
• Model number and serial number (if
available).
• Problem you are experiencing.

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