Specifies whether the DSECT, list, execute, or normal form of the macro is requested. You can be in either 24-bit or 31-bit addressing mode. If you are not authorized, you must pass the address of a DEB built by OPEN. If you are authorized, you can pass either the DEB address or the UCB address. You must ensure that the volume is allocated and will remain mounted (for example, by dynamic allocation).

MF=I

Specifies the standard form of the macro. The CVAF parameter list is generated and CVAF is called. The default is MF=I.

MF=D

Specifies the DSECT form of the macro. The macro generates a request for the ICVAFPL macro to map the unique CVAF filter CVPL (4-bytes longer than standard CVPL).

MF=L

Specifies the list form of the macro. The CVAF parameter list is generated, but CVAF is not called.

MF=(E,addr or (reg))

Specifies the execute form of the macro. The CVAF parameter list whose address is in addr or reg is used. You can modify the parameter list with this form of the macro.