A PA-100 running under Windows NT 4 may display the message "No UART Found". This is because our API currently does not support this configuration.
However, BusTools/ARINC does have integrated support for the PA-100 under Windows NT 4.
Additionally, you can use the basic serial command interface described in Chapter 6 of the "PA-100 User's Manual". This involves sending hex value commands through the serial port. See Chapter 6 for more information about how to configure the host computer and a list of command words.