To set options on the VT640 Terminal Emulator option sheet, first check the property sheet to assure that the When Opening property is set to [Display Options].
1. Select the VT640 Terminal Emulator icon and press < OPEN> .
2. Select the desired options.
3. Select [Start] in the window menu to begin a session using the options you have selected.
Select [Cancel] to close the emulator icon without starting a session.
The options you select will only affect the current session. The next time you display the option sheet, it will show the same settings as the property sheet.
VT640 windows
When an emulation session begins, the VT640 Terminal Emulator icon opens into two windows:
a Transparent Mode window and a Graphics window. Only one of these windows is active at any time, depending on the mode of the terminal emulator. When a session begins, the active window (specified by the Entry Mode property on the property sheet) is on top.
The host changes the mode of the terminal emulator in response to instructions from the application it is running or in response to control sequences from the terminal.
You can move and size the emulation windows separately. However, when you select [Close] at the top of the Graphics window, both windows close.
HOST INTERFACES REFERENCE 6·19
the top of the Graphics window, both windows
The Transparent Mode window emulates Vf640 Transparent Mode. (The original Vf640 Transparent Mode emulates a DEC VT100.) This window displays data that travels to and from the host computer. It is divided into two areas: a status area and a main text area. Figure 6-4 shows a Transparent Mode window with a session in progress.
Figure 6-4 VT640 Transparent Mode window
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Transparent Mode window commands
In the gray bar at the top of the window are commands you can use to regulate the emulation session. Commands available on the Vf640 Transparent Mode window are described below:
[Make Document]
Creates a document containing all information appearing in the current screen plus all the information that has been scrolled off the screen since the last time [Make Document] was selected, provided that the [Record Data] command is also selected. The [Make Document] command is described in more detail in the "Transferring information"
section later in this chapter.
[Make Screen]
Captures the information currently displayed on the screen and copies it into a document.
The [Make Screen] command is described in more detail in the "Transferring information"
section later in this chapter.
The following commands are found in the floating items auxiliary menu:
[Enable/Disable Online]
Controls whether or not the information you type in the emulation window is conveyed to the host. This command also displays on the Graphics window auxiliary menu.
This command does not affect your connection to the host. Your workstation remains connected and continues to receive and process data from the host whether or not this command is enabled.
The Online light indicator in the status area indicates if this command is enabled. If the light is lit, the information you type in the emulation window is sent to the host; if the
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6-22
light is not lit, the information you type in the emulation window is not sent to the host.
[Enable/Disable Local Echo]
Controls whether the emulator echoes (displays) the characters you type or waits for characters, local echo should be disabled.
[Reset Modes]
Sets the following Vf640 modes to their off state: VfS2, Cursor Appl, Keypad Appl, and Graphics Mode.
[Enable/Disable Autowrap]
Controls whether the Vf640 automatically places a carriage return-linefeed combination at the end of a line. If autowrap is not enabled and the last character position is reached on a line, the next character you type is displayed on top of the previous character.
[Enable/Disable Mouse Tracking]
Controls whether tl1e terminal emulator sends cursor-positioning escape sequences to the host to reposition the cursor to a point
[Record/Don't Record Data]
Determines whether data is recorded to a
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VP TERMINAL EMULATION OF VT640
to be saved. Performance increases slightly when [Don't Record Data] is selected, because data is not being copied to the backing document. When [Record Data] is selected, data is placed in the backing document as it is scrolled out of the Transparent Mode window.
Note: To improve performance, deselect [Record Data] in the Transparent Mode window auxiliary menu if [Make Document]
will not be selected in the current session.
[Display Always/Display When Possible]
Controls whether text displays immediately when sent to the emulation window or whether it accumulates as part of a background process and is displayed when possible. If data from the host does not appear on your screen, select [Display Always].
[Enable/Disable PCR Option]
Controls which keyboard displays when you press the < Chg Kbd> virtual function key. If you enable the PCR option, the Personal Computing Resource (PCR) auxiliary keyboard displays. If you disable the PCR option, the standard Vf640 Alternate keyboard displays.
[Show Setup Sheet]
Displays the Vf640 Set-Up properties sheet.
Transparent Mode status area
Status area symbols provide visual feedback from the host. Information in the status area is displayed in a read-only format. During emulation, "light" indicators appear in the Vf640 status areas. A filled-in oval indicates that the light is on.
HOST INTERFACES REFERENCE 6·23
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Appendix F, titled "nY status indicators,"
describes the status indicators that appear for most nY-type emulators. The VT640 Transparent Mode window displays the following additional status indicators (Refer to Figure 6-5, which shows the Transparent Mode window status area.):
Figure 6-5 VT640 Transparent Mode window status area
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Application programmable function "lights"
are turned on and off by the host computer.
VT52 Mode
When on, it indicates that the emulator is operating in VT52 compatibility mode. When off, it indicates that the emulator is operating as a VT640.
Cursor Appl
When on, it indicates that the VT640 emulator is in cursor key mode.
KeyPad Appl
When on, it indicates that the VT640 emulator is in keypad application mode.
Graphics Mode
When on, it indicates that the VT640 emulator is using ISO character translations defined by the graphics code set. When off, it indicates the emulator is using ISO character
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VP TERMINAL EMULATION OF VT640
translations defined by the Language property on the property sheet.
Transparent Mode main text area
All your Transparent Mode interaction with the host is conducted inside the main text area of the Transparent Mode window. This area can contain up to 24 lines, each with the length set by the Screen Dimensions property in the property sheet.
You enter text to this area directly from your keyboard or by copying or moving it from a document.
The terminal emulator places incoming characters at the cursor position. When you press the carriage return or as it receives information from the host, the terminal emulator scrolls up the contents of the window one line at a time.
Not all 24 lines may be visible if the window is smaller than its standard size. The emulator does not always display the bottom line. Thus, if you are typing at the bottom of the text area, you may not see the line you are currently typing (or the host's response). However, you can always display it by using the window scroll bars or adjusting the size of the window.