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Ask an Expert Forum Parallel port under XP?
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Parallel port under XP?

YT2095
YT2095 over 13 years ago

I really need some help with my Parallel port under XP, I have a programmer for PIC chips, that`s quite ancient, and it works well when I use a windows 98 machine, and yet under XP I get IO Error?

the Parallel port seems to do Some things to the programmer in way of it being recognised as being hooked up to a computer, but`s all.

and I know there`s nothing wrong with it or the leads etc...

it`s Purely a windows XP issue.

Anyone know how I can fix this?

Cheers image

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  • Former Member
    0 Former Member over 13 years ago

    XP (NT and newer) prevents direct access to IO space. one workaround is to use a virtual PC (microsoft, vmware, vbox) to run windows 98, 95, or dos on a virtual machine that has the lpt port enabled in the settings. see http://www.essjae.com/virtualization/WinVPC-InstallingWin98.pdf

    A second method is to use a kernel mode driver that allows io access. this will only work if your programmer software uses the older version of InpOut32.dll to controll the port. see http://logix4u.net/component/content/article/14-parallel-port/index.php?option=com_content&task=view&id=16&Itemid=1

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  • YT2095
    0 YT2095 over 13 years ago in reply to Former Member

    Thanks for that!

    currently I`m running the old s/ware on an equally old machine and it`s working well, but I think I`ll try the second of your 2 ideas when I get a bit more bench room to drag out my old IBM laptop and move all this other kit away.

    I need to leave my original system intact as I use my EPROM programmer on it (oddly that does work?).

    Cheers for a good and timely answer image

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