On Alpha and Integrity server systems, allocates resources for
    Fast I/O.

    This service accepts 64-bit addresses.

    Format

      SYS$IO_SETUP  func ,bufobj ,iosobj ,astadr ,flags

                    ,return_fandle

    C Prototype

      int sys$io_setup  (unsigned int func, struct _generic_64

                        *bufobj, struct _generic_64 *iosobj, void

                        (*astadr)(struct _iosa *), unsigned int

                        flags, unsigned __int64 *return_fandle);