Terminal LU specifications

All terminal LUs that are used to debug programs in full-screen mode using a dedicated terminal must have a default log mode specified in the corresponding VTAM® definitions. This log mode must match the characteristics of the terminal emulator session that is attached to this terminal LU. Use the DLOGMOD= operand on the APPL definition for the terminal logical unit (LU) to specify the default log mode.

To support the widest range of terminal characteristics, we recommend you use a DLOGMOD specification of D4C32XX3, in the IBM® supplied MODETAB of ISTINCLM. If you use a DLOGMOD specification of D4C32XX3, you must use a TN3270E emulator that responds to a VTAM query with terminal characteristics, such as size, color, and extended graphics.

If your terminal emulator session cannot provide this information, select a log mode that matches your terminal emulator session characteristics. For example, if you have a TN3270 emulator that does not respond to a query, select one of the following log modes that matches the terminal size that the user will be using:

• D4C32782 24x80
• D4C32783 32x80
• D4C32784 43x80
• D4C32785 27x132

When you specify these types of log modes, the user must select a terminal size that matches your DLOGMOD specification.

An example of a set of terminal LU definitions for the terminal side of the VTAM session is hlq.SEQASAMP(EQAWTRML). See the log mode definitions in the IBM Communications Server SNA Resource Definition Reference for further information about log modes. The MODETAB log mode table load module that contains the DLOGMOD default log mode specification must be available to VTAM via the VTAMLIB DD statement.

You need to VARY on these new terminal LU definitions, similar to the way it was done in Activating the VTAM EQAMVnnn APPLs.