It seem that coding two way parallel port interface, required by the dongles, is a difficult task. It is clearly a serious shortcoming with Win7:s XP mode. I have just a similar response on my platform. I will give you an answer as soon as I am in front of the computer again. Hi, I am travelling at the moment, I am not due back until after the 18th. Am I doing anything wrong, any tips on how to get access to the parallel port under Win7 and XP (Virtual PC) on the same machine. The dongle will not work with a USB to parallel converter. The application cannot see the hardware dongle. Device manager under Win7 and XP (Virtual PC) both have the parallel port listed as LPT1 working correctly, the Win7 has the correct driver installed, the Virtual PC only has a Microsoft driver (cannot install the real driver). I tried without any joy to get the PCI based parallel port to read the hardware dongle. Under the virtual PC device manager, the normally hidden non-plug and play device driver for the dongle seems to be loaded and started. I need to be able to open up the older version for some time in order export data between versions. I have installed 64 bit Windows 7 and Virtual PC XP on my Core i7 machine, the newer version of the application runs well under Win7, but I cannot start the older version. ![]() The software vendor has been updating its software and is moving to Win7 friendly application, however I still need to use my older version of the application which only runs under XP or earlier (including DOS). I have an older technical application that uses a parallel port hardware dongle.
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