... under the Windows system, after more than to a serial port card to install the driver, there will be four in com com port, can use the debug serial port assistant,

... add more serial interface card to the RTX system, generate a RTX drive, install the driver, can see the device in the device manager has been added to the RTX equipment, but did not map out four COM port, through the input/output address cannot operate on the COM, (programs written for COM1, COM2, effective; PCI_AD card can through the base address register for reading and writing, so as to realize the AD conversion,),

... excuse me, how a serial port card is added to the RTX system, unable to map out the four COM, was driven out of the question, whether you need to write their own the underlying drivers, thus mapping out four COM,