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Return Code, Register 15:

0

Indicates that CA MIC should process this message as usual.

4

Indicates that CA MIC should not delete this message now. However, CA MIC should consider the message for deletion again the next time this routine encounters the message.

8

Indicates that CA MIC should delete this message immediately.

12

Indicates that CA MIC should retain this message.

Note: Upon return, you must restore all registers except 0, 1, and 15.