> The best USB-serial Interfaces for Linux are the ones with FTDI Chip inside. > http://www.ftdichip.com/ > http://www.ftdichip.com/Products/EvaluationKits/USB-Serial.htm Do they have the same latency as a normal serial port? I've tried several usb-serial ports, and they all have horrible latencies compared to an onboard (or PCI card).