PCIe GPIO card

Hi folks,

this question seems a little bit off topic to me too but still I believe
there is no better place to ask.

I am looking for an interface card to connect a single pin of an
external device (output 3.3-5V) to a standard PC or notebook. There is
no parallel or serial port available on those modern PCs so I was
looking for some kind of PCI/PCIe/ExpressCard that would do the job. The
application would just poll the GPIO line.

Could anybody suggest anything that works reliably?

Thanks in advance.

-Andre

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