I/O PCB or AIB, I/O Area

I/O PCB

Pointer to the PCB that represents a destination.

AIB

Specifies the application interface block (AIB) that is used for the call. This parameter is an input and output parameter. The following fields must be initialized in the AIB:

AIBID Eye catcher.

This 8-byte field must contain DFSAIBbb.

AIBLEN AIB lengths.

This field must contain the actual length of the AIB that the application program obtained.

AIBRSNM1 Resource name.

This 8-byte, left-justified field must contain the PCB name IOPCBbbb.

AIBOALEN I/O area length.

This field must contain the length of the I/O area that is specified in the call list.

I/O Area

Pointer to a buffer to receive the next input message. The area must be long enough to hold the longest message that can be returned.