VT100.net: Digital VT102 User Guide

# 3 SET-UP Features

## General

SET-UP lets you select many VT102 features to configure the terminal for specific applications. This chapter describes SET-UP and each of the SET-UP features.

## SET-UP

In SET-UP, you can select features at the keyboard. Current feature selections appear on the screen. Two SET-UP displays show the features selections - SET-UP A and SET-UP B (Figure 3-1). The first display (SET-UP A) shows the location of the tab stops selected. A visual ruler numbers each column. The second display (SET-UP B) shows the other SET-UP features.

## Selecting Features

You can select SET-UP features at the keyboard or with the computer. When you select features at the keyboard, the terminal must be in SET-UP. The terminal can enter SET-UP while on-line or off-line.

Entering SET-UP cancels print operations. If KBD LOCKED is on, the terminal erases the keyboard buffer before transmission. Exiting SET-UP turns off KBD LOCKED. Change the SET-UP feature selections by using the following general procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to select the correct SET-UP display. | Terminal displays selected SET-UP display.
Change the SET-UP feature selection. | SET-UP display shows feature selection.
Store the SET-UP features if desired. | Terminal displays "Wait" and then SET-UP A.
Press SET-UP to exit SET-UP. | Usually, characters displayed on screen before entering SET-UP are not lost. These characters reappear on screen after exiting SET-UP.

Table 3-1 lists the SET-UP features that the computer can change. See Chapter 5 for more information about how the computer selects features.

## Feature Memories

The terminal stores SET-UP feature selections in three SET-UP feature memories: operating (temporary), user, and default (Figure 3-2).

### Operating Memory

This memory holds SET-UP feature selections that guide terminal operation. You can select these features from either the keyboard or computer. The SET-UP displays show the feature selections in this memory.

Operating memory features are replaced by user memory features during a recall, reset, or power-up (terminal is first turned on). Change the feature selections in operating memory by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to select the correct SET-UP display. | Terminal displays selected SET-UP display.
Change the SET-UP feature selection. | SET-UP display shows feature selection.
Press SET-UP to exit SET-UP. | Terminal operates according to new SET-UP feature selections in operating memory.

### User Memory

This memory holds SET-UP feature selections that replace operating memory features during a store, recall, reset, or power-up. User memory in nonvolatile, so turning off the power does not affect SET-UP features. When the terminal is on, you can move SET-UP features between operating memory and user memory by using store, recall, and reset procedures.

#### Store

This procedure enters operating memory SET-UP feature selections into user memory. You perform a store at the keyboard; the computer does not have a store procedure. Store the SET-UP feature selections in user memory by using the following procedure.

NOTE: The terminal does not check the modem interface during a store; therefore received characters may be lost.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Hold down SHIFT and press S to store features in user memory. | Terminal displays Wait while storing feature selections in user memory, then displays SET-UP A.
Press SET-UP to exit SET-UP. | Characters displayed before entering SET-UP reappear.

NOTE: Storing the SET-UP features in user memory, also stores the insertion-replacement mode selection. However, you cannot select this mode at the keyboard.

#### Recall

This procedure enters user memory SET-UP feature selections into operating memory. This erases previous features in operating memory. Recall the SET-UP features from user memory into operating memory by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | The terminal displays SET-UP A.
Hold down SHIFT and press R to recall the features. | Terminal erases screen and displays Wait while recalling feature selections from user memory. When features are recalled, the terminal Disconnects from communication line Erases input and keyboard character buffers Displays SET-UP A.
Press SET-UP to exit SET-UP. | Characters displayed before entering SET-UP are lost. When exiting SET-UP, the screen is blank.

#### Reset

This procedure causes the terminal to perform a self-test and recall the user memory feature selections. This erases previous feature selections in operating memory. Reset the terminal by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press RESET to reset the terminal. | When a reset is performed, the terminal Disconnects from communication line Erases input and keyboard character buffers Performs power-up self-test Performs an automatic recall and operates according to SET-UP feature selections in user memory Automatically exits SET-UP. Characters displayed before entering SET-UP are lost; the screen is blank.

### Default Memory

This memory holds default SET-UP feature selections for all SET-UP features. Default SET-UP feature selections are typical feature selections you cannot change. When a default occurs, operating memory SET-UP feature selections change to default selections. There are two types of default selections, general and tab default. A default does not change SET-UP features in user memory. A default occurs when you select it or when the terminal cannot read user memory.

#### General Default

This changes all SET-UP features in operating memory to default memory selections. SET-UP A features are set to 80 columns per line, with a tab stop every eighth column. SET-UP B default features are shown in Figure 3-3. The terminal switches off-line and erases the answerback message from operating memory. Select a general default by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Hold down SHIFT and press D to select a general default. | When a general default is selected, the terminal Disconnects from communication line Erases input and keyboard character buffers Displays SET-UP A Operates according to SET-UP feature selections in default memory.
Press SET-UP to exit SET-UP. | Characters displayed before entering SET-UP are lost; the screen is blank.

#### Tab Default

This clears all terminal tab stop settings and sets a new tab stop at every eighth column. Select a tab default by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to exit SET-UP. | Terminal displays SET-UP A.
Hold down SHIFT and press T to select a tab default. | Tab stops are set every eighth character position in SET-UP A.
Press SET-UP to exit SET-UP. | Characters displayed before entering SET-UP reappear.

## Feature Types

SET-UP features change how the terminal operates. They allow you to configure the terminal to operator preferences, and they provide compatibility with the computer and ac power source. Table 3-2 divides the SET-UP features into three types: operator preference, communication compatibility, and installation.

### Operator Preference Features

These features configure the terminal to operator preferences. They do not affect information transferred between the terminal, computer, and printer.

### Communication Compatibility Features

These features configure the terminal for compatibility with a computer and optional serial printer. There are many combinations of SET-UP features used when communicating. An error in these selections may stop communication or transfer incorrect information between the terminal, computer, and printer.

NOTE: This chapter describes the SET-UP features used to provide compatibility. See Chapter 6 for more information about using these SET-UP features.

### Installation Features

These features configure the terminal for operation in different installations. If the terminal location changes, you must verify these feature selections.

## Feature Descriptions

The following descriptions group SET-UP features by the SET-UP display in which they appear. There are three types: general SET-UP features (in any SET-UP display), SET-UP A features, and SET-UP B features.

Each section begins with a general procedure for changing each SET-UP feature in that SET-UP display. Where needed, the SET-UP feature descriptions provide more detail.

### General SET-UP Features

You can change the on/off line and screen brightness SET-UP features in any SET-UP display. Dedicated keys select these features. Each feature description includes the specific procedure used to select the feature.

#### On/Off Line

This feature places the terminal either on-line or off-line (Figure 3-4). While on-line, ON LINE is on and the terminal can communicate with the computer. The terminal transmits keyboard entries to the computer and displays characters received from the computer on the screen.

When switched off-line, the terminal disconnects from the communication line and erases both the input and keyboard character buffers. While off-line, OFF LINE is on and the terminal cannot communicate with the computer. The terminal does not transmit keyboard entries, but displays them on the screen. Select on-line or off-line by using the following procedure.

NOTE: When the disconnect character enable SET-UP feature is on, perform a long break disconnect before switching the terminal off-line. See Chapter 6 for more information about performing a long break disconnect.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press ON/OFF LINE to select on-line or off-line. | ON LINE or OFF LINE comes on to show feature selection.
Press SET-UP to exit SET-UP. | Characters displayed before entering SET-UP reappear.

#### Screen Brightness

This feature adjusts the screen brightness. Pressing increases brightness and pressing decreases brightness. Adjust screen brightness by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press or to adjust brightness. | SET-UP display increases or decreases brightness.
Press SET-UP to exit SET-UP. | Characters displayed before entering SET-UP reappear.

### SET-UP A Features

The SET-UP A display is similar to Figure 3-5. The display summarizes the number of columns per line and tab stop feature selections. A ruler on the bottom display line numbers each column position on a line. A T above the ruler shows a tab stop. Dedicated keys select SET-UP A features. Each feature description includes the specific procedure to select the feature.

#### Columns Per Line

This feature selects a display of either 80 or 132 columns per line. The screen uses 24 display lines regardless of the columns per line selection. The displayed lines are the same width, but the columns are closer together when using 132 columns per line (Figure 3-6). Select the number of columns per line by using the following procedure.

NOTE: When printing characters displayed on the screen, you must set the horizontal margins of the printer wider than this feature selection.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press 80/132 COLUMNS to select the number of columns per line. | The ruler on the bottom display shows feature selection.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP are lost; the screen is blank.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B.

#### Tab Stops

Tab stops are column positions selected on screen lines. The cursor can tab (advance) to the column with the tab stop. You can change tab stops one at a time, or clear all tabs stops and set them one at a time.

SET/CLEAR TAB sets and clears each tab stop one at a time. CLEAR ALL TABS clears all tab stops. A tab default sets a tab stop every eighth column position. (See SET-UP Feature Memories in this chapter for more information about tab default). Select the tab stops by using the following procedure.

NOTE: When printing characters displayed on the screen, terminal and printer tab stops are ignored. When using printer controller operation, printer horizontal tab stops must match the computer.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press CLEAR ALL TABS. or | This clears all tabs.
Press SET/CLEAR TAB to select tab stops. | This sets or clears the tab at the cursor position. You can move the cursor by using , , RETURN, TAB, or SPACE BAR.
Press SET-UP to exit SET-UP. or | Characters displayed on the screen before entering SET-UP appear.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B.

### SET-UP B Features

You can only enter SET-UP B from SET-UP A. The SET-UP B display is similar to Figure 3-7. Figure 3-8 summarizes the SET-UP B display features. The bottom display line shows groups of switches indicating the features selected. Modem interface and printer interface features appear above the switches.

Dedicated keys select the modem and printer interface features. Feature descriptions provide selection procedures. SET-UP switches select all other SET-UP B features. Change SET-UP feature switch selections by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B.
Position the cursor over SET-UP feature switch to be changed. | Move the cursor by using , , RETURN, TAB, or SPACE BAR.
Press TOGGLE 1/0 to select the feature. | Terminal displays the feature selection.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP reappear.
Press SETUP A/B to enter SET-UP A. | Terminal displays SET-UP A.

The following paragraphs describe the features shown by the SET-UP switches on the screen. Switches are referenced in order by group and number. For example, switch 3-2 is the second switch from the left in the third group. Following these features, the text describes the modem and printer interface features. The answerback feature is the last feature described.

#### Scroll (Switch 1-1: 0 = Jump, 1 = Smooth)

Scrolling is the upward or downward movement of existing lines on the screen. Scrolling makes room for new lines at the bottom or top of the screen. There are two methods of scrolling, jump scroll or smooth scroll.

Jump scroll displays new lines on the screen as fast as received. You should select jump scroll when using half-duplex communication or full-duplex communication without XON/XOFF support.

Smooth scroll limits the speed at which new lines can appear. Therefore, the movement of lines occurs at a smooth, steady rate. This makes the lines displayed on the screen easier to read.

#### Auto Repeat (Switch 1-2: 0 = Off, 1 = On)

This feature repeats a key automatically, when you hold it down for more than one-half second. Keys auto repeat at the rate of about 30 times per second. Auto repeat affects all keyboard keys except SET-UP, ESC, RETURN, ENTER, NO SCROLL, and CTRL with another key. When this feature is off, keys do not auto repeat.

#### Screen Background (Switch 1-3: 0 = Dark, 1 = Light)

This feature determines the screen background (Figure 3-9). The dark setting selects light characters on a dark background. The light setting (reverse screen) selects dark characters on a light background.

#### Cursor (Switch 1-4: 0 = Underline, 1 = Block)

This feature provides a choice between two cursor displays. The cursor indicates the active screen position (where the next character will appear). The cursor is either a blinking underline (_) or blinking block ().

#### Margin Bell (Switch 2-1: 0 = Off, 1 = On)

This feature generates a bell tone when the cursor moves past the eighth character position from the end of the line. The margin bell can turn on or off. Margin bell volume is not adjustable.

NOTE: This feature works when typing text, as in a typewriter. It may give unexpected results when performing other functions.

#### Keyclick (Switch 2-2: 0 = Off, 1 = On)

Keyclick is the sound generated each time you press a key, except for SHIFT and CTRL. Keyclick can turn on or off; however, operators usually prefer this feature on. Keyclick volume is not adjustable.

Keyclicks do not sound during a keyboard locked condition (indicated by KBD LOCKED). See Chapter 1 for more information about KBD LOCKED.

#### ANSI/VT52 (Switch 2-3: 0 = VT52, 1 = ANSI)

The terminal follows two different standards for processing control functions, American National Standards Institute (ANSI) and VT52 compatible. With ANSI, the terminal generates and responds to control functions per ANSI standards X3.41-1974 and X3.64-1979. With VT52 compatible, the terminal can operate with previous DIGITAL software using the VT52 video terminal. See Chapter 5 for more information about received characters and control functions.

#### Auto XON/XOFF (FDX) (Switch 2-4: 0 = Off, 1 = On)

The terminal places received characters (other than NUL) in an input character buffer. The input buffer holds received characters until the terminal processes them. After processing, the terminal sends the characters to the computer, printer, or screen.

If the terminal receives characters faster than it can process them, the input character buffer begins to fill. Also, entering SET-UP prevents the terminal from taking characters from the input buffer; this fills the input buffer and may cause the loss of characters. When the buffer is full, the terminal loses received characters and displays the substitute character ().

In full-duplex communication, the auto XON/XOFF feature prevents the loss of received characters. When the feature is on, the terminal transmits XON and XOFF to indicate that the input character buffer is almost full or empty. When this buffer is almost full, the terminal transmits XOFF (DC3). The computer should stop transmitting characters.

As the terminal processes (removes) characters from the input character buffer, the number of characters in the buffer decreases. When the input buffer is almost empty, the terminal transmits XON (DC1) to allow the computer to continue transmitting characters.

When this feature is off, the terminal ignores XON and XOFF when received. NO SCROLL (which uses XON and XOFF) does not function.

NOTE: The printer interface uses XON and XOFF regardless of the auto XON/XOFF selection.

When this feature is on, XON and XOFF control the keyboard character buffer. After receiving XOFF, the terminal stops transmitting characters to the computer. After receiving XON the terminal can transmit characters to the computer.

#### US/UK Character Set (Switch 3-1: 0 = #, 1 = £)

This feature selects either the United States or United Kingdom character set. The difference between the two character sets is one character, the US # (number) or UK £ (pound) symbol.

#### Auto Wrap (Switch 3-2: 0 = Off, 1 = On)

This feature selects where the next received character will appear when the cursor is at the right margin. When the feature is off, the terminal writes the character and all following characters into the last column of the current line. When the feature is on, the terminal automatically displays the character on the next line.

#### Linefeed/New Line (Switch 3-3: 0 = Off, 1 = On)

This feature selects the character(s) transmitted by RETURN and determines the action taken by the terminal when receiving a linefeed.

When the feature is off, pressing RETURN generates a carriage return (CR). A linefeed (LF) moves the cursor to the next line, maintaining the current column position.

When the feature is on, pressing RETURN generates a carriage return (CR) and linefeed (LF). A linefeed (LF) moves the cursor to the left margin of the next line.

NOTE: The terminal processes form feed (FF) and vertical tab (VT) as linefeed (LF).

#### Local Echo (Switch 3-4: 0 = Off, 1 = On)

When this feature is on, every character transmitted to the computer automatically appears on the screen (Figure 3-10). The computer does not have to transmit (echo) the character back to the terminal for display. When the feature is off, the terminal transmits characters only to the computer. The computer must transmit them back to the terminal for display.

#### Print Termination Character (Switch 4-1: 0 = None, 1 = Form Feed)

When this feature is set to form feed, the terminal transmits a form feed (FF) to the printer after a print screen operation. When the feature is set to none, the terminal does not transmit the print termination character. However, carriage return (CR) and linefeed (LF) are always transmitted when printing ends.

#### Print Extent (Switch 4-2: 0 = S Reg, 1 = F Screen)

This feature selects the characters printed during a print screen operation. When the feature is set for full screen (F Screen), all characters on the screen print. When the feature is set for scrolling region (S Reg), only the characters located in the scrolling region print. The scrolling region is the screen area between the top and bottom margins. The computer selects the margins. If margins are not selected, all characters on the screen print.

#### One or Two Stop Bits (Switch 4-3: 0 = one, 1 = two)

This feature selects the number of stop bits (one or two) used by the modem interface. The number of stop bits used by the computer and terminal must be the same. See Modem Serial Characters in Chapter 6 for more information about asynchronous character format and the use of stop bits.

NOTE: This feature does not select the number of stop bits used by the printer interface. The printer transmit/receive speed SET-UP feature does.

#### Receive Parity (Switch 4-4: 0 = Ignore, 1 = Check)

This feature either checks or ignores the parity bit of received characters. If the feature is set to check, the terminal checks the parity bit selected by the parity feature.

NOTE: The terminal can check received characters for odd or even parity, but not for mark and space parity.

If a receive parity error occurs, the terminal displays the substitution character () in place of the character with the error. When the feature is set to ignore, the terminal ignores any parity bit received.

#### Break Enable (Switch 5-1: 0 = Off, 1 = On)

When this feature is on, pressing BREAK transmits a break. When this feature is off, BREAK does not operate when pressed alone. All other key sequences using BREAK are not affected. See Break in Chapter 6 for more information.

#### Disconnect Character Enable (Switch 5-2: 0 = Off, 1 = On)

When this feature is on, the terminal disconnects from the communication line after receiving a disconnect character. The terminal also automatically transmits a disconnect character after a long break disconnect. When the feature is off, received control characters do not cause communication line disconnects.

The turnaround/disconnect feature selects the disconnect character. See Turnaround/Disconnect Character for more information about turnaround characters.

#### Disconnect Delay (FDX) (Switch 5-3: 0 = UK, 1 = Other)

This feature is only used when the modem control feature is set to full-duplex with modem control (FDX B and FDX C). In these modes, the terminal disconnects from the communication line after receive line signal detection (RLSD) turns off. This feature selects the time period between loss of signal and disconnection.

In the United Kingdom, the telephone system transmits a dial tone 0.06 seconds after RLSD is lost. For most other installations, the system transmits a dial tone after 2 seconds.

NOTE: In the United States, always set this feature for other (1).

#### Auto Answerback Enable (Switch 5-4: 0 = Off, 1 = On)

This feature causes the terminal to automatically transmit the answerback message after a communication line connection. In half-duplex communication with the initial direction feature set to receive, the terminal cannot transmit the answerback message until the line turns around. This feature does not affect the transmission of the answerback message when using CTRL and BREAK. See Answerback in this chapter for more information.

#### Initial Direction (HDX) (Switch 6-1: 0 = RCV, 1 = XMIT)

This feature is only used when the modem control feature is set to half-duplex (HDX A or HDX B). The feature determines if the terminal begins half-duplex communication by receiving (RCV) or transmitting (XMIT).

#### Auto Turnaround (HDX) (Switch 6-2: 0 = Manual, 1 = Auto)

This feature is only used when the modem control feature is set to half-duplex coded control (HDX B). The feature causes the terminal to automatically transmit the turnaround character (selected by the turnaround/disconnect character feature) after:

- The characters transmitted by RETURN
- The end of the answerback message.

NOTE: If the turnaround character is carriage return (CR), RETURN does not generate two carriage returns.

When this feature is set for manual, you must use a CTRL key combination to generate the turnaround character. See Chapter 4 when using CTRL to generate control characters.

#### Reserved (Switch 6-3: Always = 0)

This feature is reserved for future use. Do not change.

#### Reserved (Switch 6-4: Always = 0)

This feature is reserved for future use. Do not change.

#### Power (Switch 7-1: 0 = 60 Hz, 1 = 50 Hz)

This feature is set to match the power line frequency. You should set the feature to reduce screen flicker.

#### WPS Terminal Keyboard (Switch 7-2: 0 = Off, 1 = On)

This feature changes the position of the LINE FEED and \ (backslash) keys when the VT102 operates as a word processing terminal. Otherwise, this feature is off (0).

#### Clock (Switch 7-3: Always = 1)

This feature selects the modem clock. Do not change this selection, or the terminal cannot communicate with the computer.

#### Reserved (Switch 7-4: Always = 0)

This feature is reserved for future use. Do not change.

#### Modem Data/Parity Bits

This feature selects two separate but related communication features, data bits per character and parity. You can set data bits per character to seven or eight data bits. When you select eight bits, the terminal sets the eighth data bit to a space (or 0) for transmitted characters and ignores the eighth bit of received characters.

Parity selects the type of parity bit the terminal generates when transmitting or receiving characters. To check the parity of received characters, set the receive parity feature to check. When you use received parity, set the parity feature to odd or even. The terminal cannot check mark and space parity.

If you select no parity, the terminal omits the parity bit in transmitted characters and ignores it in received characters. Table 3-3 lists the possible data bits per character/parity combinations. Set the modem data/parity bits feature by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B. Entering SET-UP B automatically selects the modem features.
If the modem features are not selected, hold down SHIFT and press . | Modem features appear in reverse video when selected.
Hold down SHIFT and press P to select the feature. | Each time you press this key combination, the terminal selects another data bits per character/parity combination.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP reappear.
Press SETUP A/B to enter SET-UP A. | Terminal displays SET-UP A.

#### Modem Transmit Speed

This feature selects the terminal speed (baud rate) for characters transmitted to the computer. Set the feature to match the computer receive speed. The terminal transmits characters at any one of the following speeds: 50, 75, 110, 134.5, 150, 200, 300, 600, 1200, 1800, 2000, 2400, 3600, 4800, 9600, and 19,200 baud. The terminal's transmit and receive speeds are not unrelated. It can transmit characters at one speed and receive characters at a different speed. Select the modem transmit speed by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B.
If the modem features are not selected, hold down SHIFT and press . | Modem features appear in reverse video when selected.
Press TRANSMIT SPEED to select the transmit speed. | The terminal displays the current feature selection.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP reappear.
Press SETUP A/B to enter SET-UP A. | Terminal displays SET-UP A.

#### Modem Receive Speed

This feature selects the terminal speed (baud rate) for received characters. Set the feature to match the computer transmit speed. The terminal receives characters at any one of the following speeds: 50, 75, 110, 134.5, 150, 200, 300, 600, 1200, 1800, 2000, 2400, 3600, 4800, 9600, and 19,200 baud. The terminal's receive and transmit speeds are unrelated. It can receive characters at one speed and transmit characters at a different speed. Select the modem receive speed by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B.
If the modem features are not selected, hold down SHIFT and press . | Modem features appear in reverse video when selected.
Press RECEIVE SPEED to select the receive speed. | Terminal displays current feature selection.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP reappear.
Press SETUP A/B to enter SET-UP A. | Terminal displays SET-UP A.

#### Modem Control

This feature selects half- or full-duplex communication with the computer. Set the feature to match the computer's communication type. The modem control feature selections are as follows. See Chapter 6 for more information.

- FDX A - Full-duplex with no EIA modem control (data leads only)
- FDX B - Full-duplex with EIA modem control
- FDX C - Asymmetric full-duplex with EIA modem control
- HDX A - Half-duplex supervisory control
- HDX B - Half-duplex coded control

Select the modem control feature by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B.
If the modem features are not selected, hold down SHIFT and press . | Modem features appear in reverse video when selected.
Hold down SHIFT and press M to select the feature. | Each time you press this key combination, the terminal displays another modem protocol selection.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP reappear.
Press SETUP A/B to enter SET-UP A. | Terminal displays SET-UP A.

#### Turnaround/Disconnect Character

This feature selects both a turnaround and disconnect character. When you set the modem control feature to half-duplex coded control (HDX B), you must select a turnaround character. This feature also selects a disconnect character used with all half- or full-duplex modem control feature selections. Table 3-4 lists the possible turnaround/disconnect character combinations. Select the turnaround/disconnect character by using the following procedure.

NOTE: The CR and DC3 control characters are not recommended as turnaround characters. You cannot use these characters as turnaround characters in ANSI X3.4-1977. Also, you should only select DC3 when the auto XON/XOFF feature is off.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B.
If the modem features are not selected, hold down SHIFT and press . | Modem features appear in reverse video when selected.
Hold down SHIFT and press C to select the feature. | Each time you press this key combination, the terminal selects another turnaround and disconnect character selection.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP reappear.
Press SETUP A/B to enter SET-UP A. | Terminal displays SET-UP A.

#### Printer Data/Parity Bits

This feature selects two separate but related communication features, data bits per character and parity. The feature operates the same as the modem data/parity bits feature, but uses the printer interface.

NOTE: The serial printer should not transmit characters to the terminal. However, the terminal can use XON and XOFF from the printer to prevent printer input buffer overflows.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B. Entering SET-UP B automatically selects the modem features.
If the printer features are not selected, hold down SHIFT and press . | The printer features appear in reverse video when selected.
Hold down SHIFT and press P to select the feature. | Each time you press this key combination, the terminal selects another data bits per character/parity combination.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP reappear.
Press SETUP A/B to enter SET-UP A. | Terminal displays SET-UP A.

#### Printer Transmit/Receive Speed

This feature selects the terminal speed (baud rate) for transmitting and receiving characters from the printer. The receive and transmit speeds of the printer interface are always the same (different receive and transmit speeds are not provided). Set feature to match the printer transmit and receive speeds. The printer interface uses one of the following receive/transmit speeds: 50, 75, 110, 134.5, 150, 200, 300, 600, 1200, 1800, 2000, 2400, 3600, 4800, 9600, and 19,200 baud. The printer interface uses one stop bit per character for speeds greater than 110, and two stop bits per character for 110 or less. Select the printer interface receive/transmit speeds by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B. Entering SET-UP B automatically selects the modem features.
If the printer features are not selected, hold down SHIFT and press . | Printer features appear in reverse video when selected.
Press either TRANSMIT or RECEIVE SPEED to select the speed. | SET-UP display shows feature selection. You can use either key to select baud rate.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP reappear.
Press SETUP A/B to enter SET-UP A. | Terminal displays SET-UP A.

#### Answerback

This feature lets you store a 20-character identifying message that the terminal transmits to the computer under the following conditions.

- The computer transmits a direct request for identification. The computer transmits enquire (ENQ) and the terminal responds with the answerback message. The entire sequence takes place automatically, without affecting the screen or needing operator action.
- You transmit the answerback message from the keyboard. Hold down CTRL and press BREAK to transmit the answerback message.
- You set the auto answerback enable feature, and the terminal connects to the communication line. In half-duplex, the terminal transmits the answerback message when first allowed to transmit.

Enter the answerback message by using the following procedure.

Procedure | Indication/Comments
--- | ---
Press SET-UP to enter SET-UP. | Terminal displays SET-UP A.
Press SETUP A/B to enter SET-UP B. | Terminal displays SET-UP B.
Hold down SHIFT and press A. | Terminal displays A = (Figure 3-11).
Type the message delimiter character. | This can be any character not used in the answerback message. The terminal does not transmit the message delimiter character as part of the answerback message.
Type the answerback message. | The answerback message can include up to 20 characters. If you use control characters, they appear as () character. If you make a mistake while typing the message, type the delimiter character already used and return to the third step of this procedure. This is the only way to correct errors in the answerback message.
If the message is less than 20 characters, type the delimiter character. | If you type 20 characters, the message automatically enters operating memory. Otherwise, type the delimiter character to enter the message into operating memory. You can enter the answerback message into user memory by performing a store.
Press SET-UP to exit SET-UP. or | Characters displayed before entering SET-UP reappear.
Press SETUP A/B to enter SET-UP A. | Terminal displays SET-UP A.