Advanced Topics (Terminal Application)

Escape Sequences That Affect the Terminal Window

The Terminal application supports the following escape sequences, which affect or provide information about the Terminal window:

The window state is reported in $ZB of the following READ command as:

• normal: ESC [ 1 t

• minimized: ESC [ 2 t

If rows or columns is 0 in the set command, the current value is not changed. Range of values supported is rows: 10-120, columns: 10-160.

The window size is reported in $ZB of the following READ command as ESC [ 8;rows;columns t

One consequence of changing the size is that the scroll-back buffer is cleared by the reset. Another is that for larger row values the font size is decreased to make the window fit on the screen.

Also, the following sequence sets the window title:

OSC 2; title ST

Where:

• OSC, Operating System Command, is the 7-bit sequence ESC ] or the 8-bit character $C(157).

• ST, String Terminator, is the 7-bit sequence ESC \ or the 8-bit character $C(156).

The maximum length of the title is 80 characters.

For example, the following statement changes the title of the Terminal window:

 write $C(157)_"2;a new title"_$C(156)

Key Timing Mode

To enter or exit key timing mode, press Alt+Shift+T.

This mode can help you determine performance of a host system under various load conditions. The output of a timing run is the file KEYTIMER.LOG in the system manager’s directory.

Learning Mode

In learning mode, the Terminal application generates a log file that you can quickly convert to a script file, after making only minor edits. When this mode is enabled, the log file is a sequence of script wait for and send commands. The wait for commands show up to 16 characters preceding the sent data.

To enter learning mode:

1. Press Alt+L to enable logging. Then specify a log filename and directory, as described in Logging the Session.

2. Press Alt+Shift+L.

To exit learning mode, press Alt+Shift+L.

Disabling the Close Button of the Terminal

If you need to disable the close button (X) of the Terminal application, add a registry key, as follows:

• On 32–bit Windows machines: HKEY_LOCAL_MACHINE\SOFTWARE\InterSystems\Terminal\NoExit

  Notice the space in “Terminal”.

• On 64–bit Windows machines:

  HKEY_LOCAL_MACHINE\SOFTWARE\ Wow6432Node \InterSystems\Terminal\NoExit=1

The NoExit value is of type REG_SZ in both cases.

Mapping of the Extended Keyboard

The Terminal application supports application keyboard mode for the extended keyboard as follows:

The keypad cluster of the extended keyboard is mapped as follows:

The Pause key acts as a single XON/XOFF toggle key.

Using the Terminal application with DDE

The Terminal application supports DDE (Dynamic Data ExchangeOpens in a new tab) links to permit other applications to talk to a remote host. This section assumes that you are familiar with DDE. The topics here are as follows:

• Layout — Used to obtain status information. Examples are the row and column size, whether there is a connection, and so on.

• Screen — Used to gather data from the Terminal application screen.

• Message — Used to send data to either the Terminal application screen or the host.