APL request codes module

GDDM V3R2 Base Application Programming Reference

APL request codes module

GDDM V3R2 Base Application Programming Reference
SC33-0868-02

An APL request codes module, which is independent of the subsystem under which GDDM is running, is provided with GDDM. The module defines for each GDDM call statement, the associated APL request code to be used by an APL function when requesting services of GDDM through the APL Auxiliary Processor AP 126.

Although all GDDM call statements have an equivalent APL code assigned, not all codes are supported through AP 126. The APL manuals listed below identify the supported codes for each of the subsystems for which APL is available.

VS APL for CICS: Terminal User's Guide,
VS APL for CMS: Terminal User's Guide,
VS APL for TSO: Terminal User's Guide,
APL2 Programming: System Services Reference manual.

The address of the APL Request Codes Module can be acquired by an application program by using the CALLINF external default option in the SPINIT call; see "Initialization" in topic 22.2.1.

The APL Request Codes Module is in two sections. The first provides an address table locating the descriptors for a specific range of APL codes. The second section defines the equivalence between APL request codes and GDDM calls for all codes within a specific range.

Note: The APL request codes module may be subject to change between different releases of GDDM, or, as a result of maintenance.

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