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From: pjp on 15 Jul 2010 05:48

"Paul" <nospam(a)needed.com> wrote in message
news:i1h6qg$t5g$1(a)speranza.aioe.org...
> Jamie wrote:
>> Hi,
>>
>> I have a USB GPS device that I am using in windows XP, when I plug it
>> into the USB port, windows autodetects it as a mouse, and the data that
>> is sent by the GPS device makes the mouse cursor move around. The GPS
>> software I have works properly and also can read the GPS device, but it
>> is hard to use since the mouse cursor moves around by itself. Is there a
>> way to prevent windows from autodetecting this USB device as a mouse?
>>
>> cheers,
>> Jamie
>>
>
> My guess would be as follows.
>
> 1) The USB GPS is really an RS232 GPS with a USB to RS232 adapter
> chained to it. So really, it appears to Windows as a serial port.
>
> 2) They used to make serial mice. That was a mouse that plugged into
> an RS232 port. There was code to check RS232 ports, and see if one
> of those kind of mice was connected.
>
> I suspect that is how a mouse is being detected on that port. First,
> Windows detects a serial (RS232) port. Then, the mouse detection
> function tests for a serial mouse, and thinks it has found one.
>
> The question then is, can you disable serial mouse detection on
> WinXP, in the same way as you can in these articles ?
>
> (WinNT and /NoSerialMice)
> http://support.microsoft.com/kb/131976
>
> (Win2K and registry hack for serenum)
> http://support.microsoft.com/default.aspx?scid=kb;en-us;q283063
>
> According to this, the /fastdetect option in boot.ini , does the
> same thing as /NoSerialMice used to do. I don't see /fastdetect
> offered in the "msconfig" utility that manages boot.ini , so
> you might have to hack boot.ini the hard way (with Notepad).
>
> http://web.archive.org/web/20061206095427/http://www.microsoft.com/technet/sysinternals/information/bootini.mspx
>
> If "msconfig" doesn't have the necessary option, a recipe for
> using Notepad is included in this article. Apparently, the
> attrib command, used in a command window, changes the boot.ini
> so it is no longer read-only.
>
> http://www.howtogeek.com/howto/windows/how-to-delete-modify-or-disable-an-incorrect-or-duplicate-entry-on-the-xp-boot-menu/
>
> I'd test this for you, if I could only remember where I left
> my serial mouse :-) I own one, but never used it.
>
> I checked my boot.ini and it already includes /fastdetect.
> So it looks like I may already be protected from something
> like this happening.
>
> Paul

You may be right about the "serial" bs. My Pharos GPS-500 transponder came
with MS's Street's & Trips installs that way, e.g. it fakes being a serial
device using a virtual com port. BTW - it's RMA'd straight out of the box as
couldn't get it to work reliably on three different pcs.


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