Information Supplied on Exit

The contents of the registers on exit should be:
R0-10
Irrelevant
R11-13
Same as on entry
R14
Return address
R15
Irrelevant
Use the RC= parameter on the ARETURN macro to specify how JES3 is to process the data set as follows:
RC=0
Indicates that a new forms alignment is required.
RC=4
Normal completion (indicating that the current forms alignment should be continued)