TTYHWDCD
SignalControlLineState(TTYHWDCD, msr & MSR_DCD);
SignalControlLineState(TTYHWDCD, msr & MSR_DCD);
SignalControlLineState(TTYHWDCD, msr & MSR_DCD);
gTTYModule->tty_hardware_signal(fSystemTTYCookie, TTYHWDCD, enable);
gTTYModule->tty_hardware_signal(fSystemTTYCookie, TTYHWDCD,
case TTYHWDCD: