Direct Access Self-Defining Parameter

The direct access self-defining parameter provides the ID for use in the destination/origin structured field in the direct access of the OEM auxiliary device.

Table 1. OEM Auxiliary Device Direct Access Self-Defining Parameter
Offset Length Content Meaning
0 1 byte X'04' Parameter length
1 1 byte X'01' Direct access ID
2–3 2 bytes DOID Destination/origin ID
DOID
The value in these bytes is used in the ID field of the destination/origin structured field to identify the auxiliary device as the destination or origin of the data that follows.