ISTGLBAL macroinstruction

A VTAM® macroinstruction available for use in making assembly-time decisions is ISTGLBAL. ISTGLBAL declares and sets a group of macro global variables that describe the VTAM product associated with the macroinstruction definition library containing the ISTGLBAL macroinstruction. Once declared and set, the variables can be interrogated during assembly of the application program to determine whether specific functions or options of VTAM are supported.

ISTGLBAL can be invoked directly, or by either IFGRPL or IFGACB as an inner macroinstruction.

The three types of macro global variables set by ISTGLBAL are:

Release-level macro global variable (&ISTGLRL)
Component-ID macro global variable (&ISTGLCI)
Function-list macro global variables (&ISTGLxywhere x and y denote a specific variable).

Details on the macro global variables are provided in this section. A description of the ISTGLBAL macroinstruction is in ISTGLBAL.