>I really don't get this. From what you guys are saying a serial port >set over 300bps will have problems with lost data... And here I'm doing four 115K ports at a time. I have to find my errors - it's working perfectly! While it drives another port (custom parallel) driving a 62.5K connection. 55mS is all they can get? Whew, they must be using VB! Andy ================================================================== New Microprocessor support forum mail list - details on our site ------------------------------------------------------------------ andy@rc-hydros.com http://www.rc-hydros.com - Race Boats andy@montanadesign.com http://www.montanadesign.com - Electronics ==================================================================