Yes, it's a usefull program. Copy the .dll and .sys to the right subdirectory (it's all in the ReadMe), and check their properties: allow the use (WinXP may block them) Then setup the parport with UserPort.exe (the atomic danger icon), delete the defaults that do not apply; if necessary, add f.i. 378-37F, press update-button, and then start-button. Now start ParallelPortViewer.jar It took me a while to sort this out .... Good hunting ! Nard