Parameter overview

The parameter list contains the necessary information for one request. Program interface parameters illustrates the basic structure of the parameter list and the addressing linkage to it.

The parameter list must always consist of seven fullwords, representing the seven parameter types outlined here. Not all parameters are required for some requests, in which case you must set the parameter value to hexadecimal zeros. A character-type parameter value that contains blanks also indicates that the parameter is omitted. The parameter list itself must not contain zeros.

Program interface parameters describes the parameter values that are referenced by the parameter address list.

An overview of the parameters follows. More detailed descriptions of the required parameters are given with the description of each request type.