BT848_IFORM_FORMAT
temp = *(unsigned long*)arg & BT848_IFORM_FORMAT;
temp_iform &= ~BT848_IFORM_FORMAT;
temp_iform &= ~BT848_IFORM_FORMAT;
*(u_long *)arg = INB(bktr, BKTR_IFORM) & BT848_IFORM_FORMAT;