7 
DEC VT Emulations

This chapter describes features of the DEC VT terminal emulations.

Session Configuration

WBT Mode

This section describes the basic procedure for creating a session configuration when the terminal is in WBT mode. The options available are described in detail in chapter 2.

1.   Click the Configure tab in the Terminal Connection Manager then click the Add button to display the New Connection dialog box.

2.   Select Terminal Emulation Client and click OK. The Terminal Emulation Client Connection Wizard - Connection Information dialog box will be displayed.

3.   Enter a name which will identify this session configuration for future selection in the Connection Name box.

4.   Select the DEC VT terminal emulation required in the Emulation list box.

      The VT52 and VT100 emulations enable you to run applications written for the DEC VT52 and VT100 terminals, respectively.

      The VT500 7-Bit and VT500 8-Bit emulations enable you to run applications written for the DEC VT320 terminal, the difference is in their treatment of 8-bit control codes. When VT500 7-Bit is selected, all 8-bit codes are converted to their 7-bit equivalents, whereas VT500 8-Bit leaves 8-bit codes unchanged. If you are using VT200 applications, select VT500 7-Bit.

5.   Specify the required VT Terminal ID setting.

6.   Click Next to display the Host Information dialog box.

      For a TCP/IP connection, click the TCP/IP button, enter the name or internet address of the host computer in the Host Name box, then click Advanced for additional Telnet options. Refer to the TCP/IP Connection Settings section in chapter 2 for details.

      For a serial connection, click the Serial button, specify the communications port in the Connect To box, then click Advanced for additional serial options. Refer to the Serial Connection Settings section in chapter 2 for details.

      Make the relevant selections then click OK to return to the Host Information dialog box, then click Next.

7.   The following four dialog boxes provide further configuration options which are described in chapter 2. Click Next to advance through the dialog boxes.

                                                   Automate Login Process
                                             Printer Port Settings
                                             GUI Overrides
                                             Aux Port Settings

8.   When you have made your selections, click Finish to return to the Terminal Connection Manager.

9.   In the Terminal Connection Manager, display the Connections list, select the session name you specified earlier in step 3, then click the Connect button.

Non-WBT Mode

This section describes the basic procedure for creating a session configuration when the terminal is not in WBT mode. The options available are described in detail in the Setup Menus chapter.

1.   Display the Settings menu from the command bar and select Emulation... to display the Emulation Settings dialog box.

2.   Select the DEC VT terminal emulation required in the Alpha Emulation list box.

      The VT52 and VT100 emulations enable you to run applications written for the DEC VT52 and VT100 terminals, respectively.

      The VT500 7-Bit and VT500 8-Bit emulations enable you to run applications written for the DEC VT320 terminal, the difference is in their treatment of 8-bit control codes. When VT500 7-Bit is selected, all 8-bit codes are converted to their 7-bit equivalents, whereas VT500 8-Bit leaves 8-bit codes unchanged. If you are using VT200 applications, select VT500 7-Bit.

3.   Specify the required VT Terminal ID setting then click OK to close the dialog box.

4.   Display the File menu from the command bar and select New Connection to display the New Connection dialog box.

5.   Select the type of host connection required in the Type list box.

      For a TCP/IP connection, select TCP/IP, enter the name or internet address of the host computer in the Connect To box, then click Configure for additional Telnet options. Refer to the TCP/IP Connection Settings section in chapter 2 for details.

      For a serial connection, select Serial, specify the communications port in the Connect To box, then click Configure for additional serial options. Refer to the Serial Connection Settings section in chapter 2 for details.

6.   When you have specified the required settings in the New Connection dialog box, click the Connect button to make the connection.

Note:   You can save these settings as a connection template using the Save Session As dialog box. Refer to the Setup Menus chapter for details.

The Status Bar

The status bar along the bottom of the display enables you to switch between modes and show the status of various operations.

  1     2      3         4              5                6           7     8               9            10           11

Item 1:        This displays two LEDs. The first LED indicates whether or not you are connected to the host. It will show red when not connected and green when you are connected. The second LED indicates whether or not data is being sent to or from the host. It will show dull green when there is no activity, red when data is being sent to the host, and bright green when data is being received from the host.

Item 2:        This button enables you to switch between Local and Online mode. The label indicates the mode you will switch to if the button is clicked.

Item 3:        This button enables you to Pause or Resume scrolling data in the window. The label indicates the action that will be taken if the button is clicked.

Item 4:        Indicates the current terminal emulation.

Item 5:        This displays the active session (always 1), the current page number (always 1), and the line,column location of the text cursor.

Item 6:        This indicates whether Overstrike Mode or Insert Mode is currently selected. In Overstrike Mode (default), new characters will replace already existing characters at the cursor position. When Insert Mode is selected, new characters will be inserted at the cursor position without deleting existing characters, which will move to the right.

Item 7:        This will display Edit when the terminal emulation is in Edit mode.

Item 8:        This will display the time in 24 hour format when in DEC VT500 mode if the VT525 set time command has been received from the host.

Item 9:        Indicates the status of the printer as follows:

                   None signifies that the printer is not turned on or not connected, or not installed in Microsoft Windows.

                   Not Ready signifies that the printer is not ready to receive data for printing.

                   Ready signifies that the printer is ready to receive data for printing.

                   Auto signifies that the emulation is in Auto Print mode in which the current cursor line is sent to the printer when a command for the cursor to move to the next line is issued.

                   Controller signifies that the emulation is in Printer Controller mode in which the host has direct control over the printer. Print screen commands issued from the keyboard or mouse will be ignored.

                   ErrGen indicates that an error has occurred and a message box will be displayed indicating the error.

Item 10:      This indicates the keyboard mode. It will be blank when the keyboard is in normal mode and will display DEC when in DEC mode. You can toggle between normal and DEC mode by pressing the keys Alt + Num Lock together. Refer to the illustrations in the Keyboard Mapping section for the key functions available in each mode.

Item 11:      Indicates the status of the aux port as follows:

                   Ready indicates that the aux port is ready for bidirectional output.

                   In Use indicates that the aux port is currently busy.

Horizontal Scrolling

It is possible to make the width of display memory larger than the width of the window by using the Memory Page Width option in the Terminal Settings dialog box. When you want to view columns stored off-screen, you can scroll horizontally by holding down the Ctrl key and pressing the Left or Right Cursor keys.

Keyboard Mapping

The illustrations on the following pages show where DEC VT500 keyboard functions are mapped to keys on the 101/102 key Enhanced AT keyboard layout. Special key functions that are provided on the DEC VT keyboard can be mapped to any key on your keyboard by using the VT virtual key names listed in the Define Keyboard Macros dialog box.

The keyboard can be used in two modes, Normal and DEC. You can toggle between the two modes by pressing the keys Alt + Num Lock together. The 10th item on the status bar will display DEC when the keyboard is in DEC mode. The field will be blank when in normal mode.

Enhanced AT Keyboard Layout
Normal Mode

Enhanced AT Keyboard Layout
DEC Mode

Notes