Solution:

Kindly have a look at the attached file. It will show you how to verify DI and DO port of PCL-839. Basically, the PCL-839 driver is a stand alone driver, so you have to using the specific example to verify this card. And all the drivers for PCL-839 also specifically. you can get the detail information from file "PCL839.HLP" and "ADS839.HLP". After installed v1.3 32-bit DLL drivers, you can get this example DEMO.EXE which located on directory "Program Files\Advantech\adsapi\Examples\VC\839demo". Then kindly refer to the attached file to verify this card (only for demo DI/DO).