The feedback option specifies that the system is to provide the address of the record requested by a READ or WRITE macro. This address can be in the same form that was presented to the system in the READ or WRITE macro, or as an 8-byte actual address. You can specify the feedback option in the OPTCD parameter of the DCB and in the READ or WRITE macro. If the feedback option is omitted from the DCB, but is requested in a READ or WRITE macro, an 8-byte actual address is returned to you.

The feedback option is automatically provided for a READ macro requesting exclusive control for updating. This feedback will be in the form of an actual address (MBBCCHHR) unless feedback was specified in the OPTCD field of the DCB. In that case, feedback is returned in the format of the addressing scheme used in the application program (an actual or a relative address). When a WRITE or RELEX macro is issued (which releases the exclusive control for the READ request), the system will assume that the addressing scheme used for the WRITE or RELEX macro is in the same format as the addressing scheme used for feedback in the READ macro.