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PFI Static Digtal I/O on NI6221 using NIDAQmx and Visual C++ 6

I am using a NI6221 PCI card with NIDAQmx and Visual C++ V6.

I wish to use the digital I/O port0 and the PFI/Port1 pins as general static digital I/O. Giving 16 lines of static digital I/O.

I have sucessfully used the example code "Write Dig Port" on port 0 to write to the eight port 0 lines.

I cannot find a reference to allow PFI/port 1 to be used in a similar way?

I have tried using the definition "Dev1/port1" but this does not work.

Thanks in advance
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