I dont' become answers after ctrl-Z. I use a serial port (probed using a mouse) it work (and COM port identify). I have connected pins 3/2 to TX RX from hd (probed and probed inverted). Connection parameters in Hyperterminal are correct. I think the problem my be at power. I have connected a external serial ATA interface and pin 3/2 of serial port to TX RX (GRND have a jumper with the pin at left). Is it correct, or my be connect other extra power? Using +3V battery where I have to connect it? Excuse me for my horrible english!