After you have established an attention exit to the system via the STAX macro, it may become necessary for you to postpone the processing of an attention interruption until some processing completes. For example, you want to invoke a routine, and you do not want that routine interrupted by the user pressing the attention interrupt key. The STAX DEFER=YES operand gives you this ability. When you invoke STAX with the DEFER=YES operand, you in effect postpone any attention exits for the current task and any higher-level tasks.

After you invoke the STAX DEFER=NO operand, any attention interruption that is pending will be processed. That is, your previously identified attention exit will receive control.