... Win7 64 Mac Description:Input: USB2.0 port into the computer.Output: RS232 port to serial devices.Full compliance with USB 1 ... upstream and downstream data flow.Installed as a standard Windows COM port,RS-232 data signals; TxD, RxD, RTS, CTS, DSR, DTR ... , DCD, RI, GND.No IRQs required, no IRQ conflicts.upports the following Operating Systems.Win 98 ...