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Parallel Port Access from Windows XP?

Discussion in 'Electronic Design' started by mike, Dec 29, 2004.

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  1. mike

    mike Guest

    I have a pile of Quickbasic utility/hardware control programs that
    directly access PC parallel port hardware. I also have several legacy
    hardware devices that interface via the Parallel port...logic analyzer,
    prom programmer, battery charger etc.

    These have all been rendered obsolete by Windows XP's denial of access
    to the port hardware. Yes, I can dual boot, but that ain't what I want.

    I'm sure this is a good idea for 99.9% of the population who only use
    their PC for power point presentations and downloading porn. But it's
    a problem for us hardware junkies.

    Recoding all the programs in VB with a third party control to access the
    ports works, but only for the code I wrote. And it will no longer run
    on the dos laptop. I'd really like to be able to pop out three lines of
    quickbasic code to run some hardware test.

    What's needed is a hack for XP that lets the OS ignore direct
    reads/writes to the parallel port. If hackers can disable registration
    codes, they ought to be able to figure out how to make XP ignore direct
    port accesses. It might be as simple as hacking an older version of to run as the dos box in XP. I haven't tried setenv
    yet, but that would be too easy.

    Google turns up LOTS of requests for this capability, but so far, no

    Anything helpful available?
    Thanks, mike
    Return address is VALID.
    Wanted, Slot 1 Motherboard
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  2. John Larkin

    John Larkin Guest

    Google TOTALIO.

  3. Si Ballenger

    Si Ballenger Guest

    Google for to get userport for access to the
    parallel port.
  4. Jerry

    Jerry Guest

    Have you looked at

    Per there website:
    "ParPort 2004 delivers the ability to access PC parallel ports from Win32
    applications under Microsoft Windows 2000, Windows XP & Windows Server
    2003. Previously, the only way would have been to write an device driver to
    perform the I/O on behalf of the application.

    This package allows Win32 applications to access hardware connected to a
    parallel port with the same ease as was previously available under Windows
    98 and MS-DOS.

    Access is coordinated with the standard Windows parallel driver to ensure
    that the parallel port is only 'claimed' if no other process is currently
    using it. Once the port is 'claimed', other processes are blocked from
    using the port.

    Once the application has finished using the parallel port, the parallel
    port is free for use by any other process again."

    I have no interest in this company, I am only trying to help.

  5. JeffM

    JeffM Guest

  6. mike

    mike Guest

    Thanks, initial tests indicate that userport will solve the problem.
  7. mike

    mike Guest

    I gotta admit that I have no idea what I'm doing. I think I'm using the
    default settings in the Netscape 7 mail/news reader.
    Is there a reason I WOULD want my posts archived? And where would I set
    the bit?
    Thanks, mike

    Return address is VALID.
    Wanted, Slot 1 Motherboard
    500MHz Tek DSOscilloscope TDS540 Make Offer
    Wanted, 12.1" LCD for Gateway Solo 5300. Samsung LT121SU-121
    Bunch of stuff For Sale and Wanted at the link below.
  8. Jerry

    Jerry Guest

    In the headers X-No-Archive: Yes

    I think JeffM was referring to the post from Si Ballenger.
  9. JeffM

    JeffM Guest

    Your posts look normal.

    The query was for Si Ballenger.
    I tried to get the link to point to his post
    but it looks like I don't have it quite figured out
    on the NEW IMPROVED Google Beta. (Yeeck)
    ...or maybe THEY don't have it debugged yet.
  10. Si Ballenger

    Si Ballenger Guest

    The same question was asked in the
    microsoft.public.windowsxp.hardware news group. I turned off the
    x-no-archive for that post as it contained a more detailed
    answer, and the followups from the MS types that give advice in
    the MS groups said you couldn't have access to the parallel port
    in XP. I wanted that followup to be archived as it has more info
    on how to get access. I usually have no archiving turned on for
    general post and usenet flame wars. Started it back in ~1996 with
    the old DejaNews archive, and old habits die slowly. One problem
    I see with the new "google groups" is that the followups don't
    include some of the origional post like above, so it is often
    difficult to know who you are replying to.
  11. Active8

    Active8 Guest

    Not even when you click "show quotes text"?
  12. Si Ballenger

    Si Ballenger Guest

    The followup didn't have any quoted text included, so there is
    nothing to show. In the google groups web based news reader, you
    apparently always see the whole thread, so they hide the quoted
    text to save space. With other news readers, previously read post
    and followups are usually not shown to eliminate clutter. Trying
    to check the new post to groups like the
    microsoft.public.windowsxp.general news group using the google
    groups news reader is probably a real treat.
  13. Active8

    Active8 Guest

    Should have. When I go to beta, first I have to click "view tree"
    and then "show quoted text". The former is a link near the top and
    the latter is a link wherever quoted text has been snipped and it
    just expands it. That's DHTML/javascript - the text was already
    downloaded, but it's not yet displayed. Kinda like preloading images
    for mouseovers - you don't have to wait.

    What pisses me off is those "see reply" or whatever links at the
    bottom of posts where you used to see a link to view the rest of a
    long reply. You have to register to see that.

    And the ASCII art is still FUBAR.
    No. If you're talking about the old google (the new on is *still* a
    web based reader,) you had to click on "view all messages in
    thread." *Then* you get the frame that shows the whole thread.
    Haven't looked.
  14. Paul Burke

    Paul Burke Guest

    Quite a few around, some commercial, some free. GIVEIO is a thingy you
    get with a lot of ports of Linux programs to Windumb. TOTALIO is its big
    brother, that defeats all the IO protection, not just the printer ports.
    TVICHW is a shareware/ commercial program that you can set up for PCI
    card address resolution as well. I use AGENTCD that does the same thing,
    but is commercial and now only available (if at all) as part of Numega's
    DriverWorks suite.

    Paul Burke
  15. mike

    mike Guest

    There seems to be a lot of confusion over this issue. I've been
    searching for a solution since it became clear that I'd have to switch
    to XP eventually.

    #1 response has been, "can't be done! (and you're an idiot for asking)"
    Distant second has been, "portio, giveio, winio, directnt, tvicport..."
    and they're not cheap. has been around, buried in the zillion Google hits, but
    it's not been obvious that it is
    any different from the others. IT IS!!!

    It appears that programs like GIVEIO allow you to write a program that
    loads and calls a driver or whatever to give you port access. That's
    fine as far as it goes. I expect it provides protection to prevent
    stomping on other parts of the OS.
    But it does nothing to help when you have a hardware device connected to
    the parallel port and have ONLY compiled control programs for the device
    that expect unrestricted dos-mode access. appears to solve all this by poking a hole in the windowsXP
    port access prohibition. You just run it once and it FIXES XP. You
    don't need any more drivers or dlls or ocxs, no nothin'. You just write
    code and it works.

    I've been playing with it for a day. So far, it's run every old dos
    program I've thrown at it in a dosbox. Accesses the parallel port
    without a hitch. And NO MODIFICATION to the existing DOS code.

    OUT &H378, 220 works just like it should in QuickBasic.

    I expect it doesn't play nice with the printer driver. You wouldn't
    want to use it in a commercial product or put
    it on someone else's machine, but it's goin' on all mine.
    It makes my stuff work.
    I LIKE IT A LOT!!!
    Return address is VALID.
    Wanted, Slot 1 Motherboard
    500MHz Tek DSOscilloscope TDS540 Make Offer
    Wanted, 12.1" LCD for Gateway Solo 5300. Samsung LT121SU-121
    Bunch of stuff For Sale and Wanted at the link below.
  16. Si Ballenger

    Si Ballenger Guest

    I've got a parallel port printer and a parallel port scanner on
    my XP machine and they don't seem to be impacted by userport (but
    I don't print/scan while reading/writing to the port or doing bit
    banging). Older parallel port programs that need precise timing
    based on the cpu speed, like the CIR IR gizmo, still don't work
    on XP.
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