Disappearing XP Com port

Started by Tom Becker December 11, 2005
For years, literally, I have ignored a persistent annoyance when running
the BasicX IDE on XP. After some period of time of non-use, maybe 30
minutes, my desktop's COM1 seems to be unavailable to the IDE; if I try
to download, the IDE hangs, blocked, trying to halt the processor,
responding to nothing. A very long wait will eventually return control
to the IDE but it is quicker to kill the IDE in Task Manager and restart
it, when it has no difficulty with the serial port again, for awhile.

This is not limited to the IDE, nor to XP Home or XP Pro; I see it with
other serial control apps, too, which lose control after a period of an
idle serial port. It is an artifact of XP, it seems.

Anyone else see this? Tom



Hi Tom!

That shouldn't be happening in XP (Home, Pro, or other). I've seen that once
before. So few people use their com ports these days, many won't notice it
when it happens, but there are several virus' out there that attempt to scan
the serial ports looking for a modem, which they use to dial some number
that ends up billing you big $$ in long distance charges. There are other
reasons this could happen, but do you virus scan that machine? Is the Virus
DB up to date?

Just a thought...

Sloan ----- Original Message -----
From: "Tom Becker" <gtbecker@gtbe...>
To: <basicx@basi...>
Sent: Sunday, December 11, 2005 10:36 AM
Subject: [BasicX] Disappearing XP Com port > For years, literally, I have ignored a persistent annoyance when running
> the BasicX IDE on XP. After some period of time of non-use, maybe 30
> minutes, my desktop's COM1 seems to be unavailable to the IDE; if I try
> to download, the IDE hangs, blocked, trying to halt the processor,
> responding to nothing. A very long wait will eventually return control
> to the IDE but it is quicker to kill the IDE in Task Manager and restart
> it, when it has no difficulty with the serial port again, for awhile.
>
> This is not limited to the IDE, nor to XP Home or XP Pro; I see it with
> other serial control apps, too, which lose control after a period of an
> idle serial port. It is an artifact of XP, it seems.
>
> Anyone else see this? > Tom >
>
> Yahoo! Groups Links >
>




At 11:36 AM 12/11/2005 -0500, you wrote:

This is not limited to the IDE, nor to XP Home or XP Pro; I see it with
other serial control apps, too, which lose control after a period of an
idle serial port. It is an artifact of XP, it seems.

<---XP polls the hardware ports every so often.

There is a registry entry that can be changed to turn off polling (and
doing so doesn't have any negative effects that I can see) but I've only
dealt with the parallel port.

I bet a google search would reveal what you need to turn off polling of the
serial port(s).

Ken
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