Controlling the device environment

You issue all JES2 commands and control the JES2 environment from the operator's console. You can control the communication characteristics of the console, itself, using the $T CONDEF command.

The BUFWARN parameter sets the percentage of console message buffers used at which the $HASP050 message alerts you of a shortage of console message buffers. The BUFNUM parameter sets the maximum number of console message buffers that JES2 should obtain from common storage. The CMDNUM parameter sets the maximum number of console message buffers that JES2 should allocate for command processing.

Use the DISPLEN parameter to control message wrapping on the MCS console. It allows you to specify the length used for the display and error message processing of:

All initialization statements
Commands processed by $SCAN (mostly $D and $T commands for initialization statement parameters)
The $D U command, which displays the status of all JES2 devices

The DISPMAX parameter specifies the maximum number of lines displayed for the statements and commands referred to above. MAXMSG specifies the maximum number of message or commands queued between any two members of a MAS configuration. The RDRCHAR parameter allows you to specify the character used to identify all JES2 operator commands issued from a local or remote card reader.

The CONCHAR parameter allows you to identify JES2 commands that originate from local consoles. The RDIRAREA parameter specifies the default console out-of-line area which JES2 uses to direct display responses for commands subject to redirection.