> Does anyone know off-hand the memory address and value for setting the RS232 > TX line high on a PC? I need to trigger a relay connected to this line. > > Thanks. > > C. Webb All RS232 chip have BREAK condition. But what about using DTR signal against TX ? Alex Torres, Kharkov, Ukraine (exUSSR) altor@chat.ru 2:461/28@FidoNet http://www.geocities.com/SiliconValley/Lab/6311