I get a “Privilidged Instruction” error when I run the software on WinNT/2000/XP. Whats up?
WinNT, 2000, and XP have security protocols which prevent directly accessing the parallel port like you can with Win98 and below. However, you can unlock the security for specific programs and ports using third party applications. One that I use is called Direct-IO, available at www.direct-io.com. It costs $29 but there is a free demo that works for a month to try it out. After installing it: 1) Open Control Panel under Start Menu/Settings. Double click DirectIO. Click the I/O Ports tab. Enter 378 in the Begin field, and 37F in the End field then click the Add button. 2) Click the Security tab. Enter the directory\name of the program, eg.C:\Program Files\EasyCAM Pro\EasyCAMpro.exe or c:\mytmill\mytmill.exe. Then click the Add button. Exit. 3) Run the mytmill.exe or EasyCAMpro.exe normally.
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