B_HARDWARE_CONTROL
serial->SetFlowControl(B_HARDWARE_CONTROL+B_SOFTWARE_CONTROL);
message->AddInt32("flowcontrol", B_HARDWARE_CONTROL);
message->AddInt32("flowcontrol", B_HARDWARE_CONTROL | B_SOFTWARE_CONTROL);
if (fFlow & B_HARDWARE_CONTROL)
fFlow(B_HARDWARE_CONTROL),