SER_DRTS
if (sig & SER_DRTS) {
SIGCHG(sig & SER_RTS, new, SER_RTS, SER_DRTS);
if (sig & SER_DRTS) {
new = (new & ~SER_RTS) | (sig & (SER_RTS | SER_DRTS));
if (sig & SER_DRTS) {
SER_DRTS);
if (sig & SER_DRTS) {
SER_DRTS);
UART_SETSIG(sc, SER_DDTR | SER_DRTS);
UART_SETSIG(sc, SER_DRTS|SER_RTS);
UART_SETSIG(sc, SER_DDTR | SER_DRTS);
UART_SETSIG(sc, SER_DRTS);
UART_SETSIG(sc, SER_DRTS | SER_RTS);
UART_SETSIG(sc, SER_DRTS);
if (sig & SER_DRTS) {
SIGCHG(sig & SER_RTS, new, SER_RTS, SER_DRTS);