title: RS 232 Break Signal
body: <p>I got a RS232 signal capture device. and it working great. </p>
  
  <p>I need some help making sense of the data. Basically we bought it because we are dealing a late 80's machine controller that uses serial communication. We had little luck despite knowing the port parameters.</p>
  
  <p>From the data I dumped machine control is using the break signal as part of it's protocol. I am having trouble duplicating it using VB and the MSComm. I know to toggle the break signal and on and off. But I am not sure what I am supposed to be doing with it. I am supposed to leave it on for each byte of data I send.  Or send a byte of data and then toggle.</p>
  
  <p>Also I am confused how I supposed to receive any data from the controller. Do I toggle a flag when the break is turned on and then when it turned off read the input? </p>