rtc_di
(void)rtc_di();
(void)rtc_di();
(void)rtc_di();
(void)rtc_di();
data = rtc_di(); /* D3 */
data |= rtc_di(); /* D2 */
data |= rtc_di(); /* D1 */
data |= rtc_di(); /* D0 */
(void)rtc_di(sc);
(void)rtc_di(sc);
(void)rtc_di(sc);
(void)rtc_di(sc);
data = rtc_di(sc); /* D3 */
data |= rtc_di(sc); /* D2 */
data |= rtc_di(sc); /* D1 */
data |= rtc_di(sc); /* D0 */