SIaddress( uaddr, (void **) &buf, AC_TODOT );
status = (*cbptr)( gptr->cbtab[SI_CB_RDATA].cbdata, gptr->rbuf, status, buf );
SIcbstat( gptr, status, SI_CB_RDATA ); // handle status
SIaddress( uaddr, (void **) &buf, AC_TODOT );
status = (*cbptr)( gptr->cbtab[SI_CB_RDATA].cbdata, gptr->rbuf, status, buf );
SIcbstat( gptr, status, SI_CB_RDATA ); // handle status