AHD_39BIT_ADDRESSING
if ((ahd->flags & AHD_39BIT_ADDRESSING) != 0) {
return ((ahd->flags & AHD_39BIT_ADDRESSING) != 0);
ahd->flags |= AHD_39BIT_ADDRESSING;
if ((ahd->flags & (AHD_39BIT_ADDRESSING|AHD_64BIT_ADDRESSING)) != 0) {