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Configuring and Managing 3270 Terminal Emulation (TN3270) 18-17
Guidelines for Managing the Use of NVRAM for TN3270
Guidelines for Managing the Use of NVRAM for TN3270
Introduction
There is a pool of approximately 2.5 KB of shared NVRAM for the customization of
the following TN3270 characteristics:
• Keyboard maps for the ports
• ASCII-to-EBCDIC and EBCDIC-to-ASCII translation tables
This section provides guidelines on managing the available memory pool.
Storage Requirements for TN3270 Definitions in NVRAM
The following table lists the TN3270 storage requirements for TN3270 definitions in
NVRAM:
TN3270 Commands That Free NVRAM Space
The following table lists the commands used to free NVRAM space:
Definition Description Storage Requirements
Keyboard map definition for a port 8 bytes
Optional description text for a port 8 bytes for increments of 7 bytes of text
Each ASCII-to-EBCDIC and
EBCDIC-to-ASCII customized
translation
8 bytes
Command Frees NVRAM Space Used By
DEFINE [PORT] TN3270
KEYMAP 3270-Function
DEFAULT
The ASCII mnemonic and key sequence
definition for the specified 3270 function.
DEFINE [PORT] TN3270
KEYMAP ALL DEFAULT
All customized keyboard maps.
DEFINE TN3270 ETOA E-
CODE A-CODE DEFAULT
The specified EBCDIC-to-ASCII
translation.
DEFINE TN3270 ATOE A-
CODE E-CODE DEFAULT
The specified ASCII-to-EBCDIC
translation.