Dunno, never used it. Some older software doesn't work properly under XP as the LPT IO code changed significantly in XP. For example, my Willem programmer doesn't work with Windows XP's built-in parallel port driver. You have to install a replacement driver to get it to work under XP. Check in the Easylink archive for a parallel port driver which is compatible with XP. If there isn't one and it's a very old app, chances are it won't work in anything >WinME.
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moto