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

No further processing is to be performed for the data set

RC=4

The data set is to be placed on the output queue for normal processing.