What is windoes doing?

[Bill Degnan]

Every time you unplug and re-plug a USB serial cable you cause the system
to create a new IRQ address for it, called COM5, 6,7,8,9 etc.  If you do
the thing where you "remove usb devices safely" routine you can avoid this.
b

On Mon, Nov 19, 2018 at 12:13 PM geneb via cctalk <cctalk at classiccmp.org>
wrote:

> On Mon, 19 Nov 2018, Ethan via cctalk wrote:
>
> >> I have a question. I use the USB port for serial. In my program, I use
> a
> >> fixed com port. When going to the control panel, I find that I see (in
> use)
> >> tags on some of the com ports. I'm the only one currently using the com
> >> ports but recently another (in use) showed up, requiring me to modify
> my
> >> program to use another com port. How does one unuse a com port? how do
> I
> >> find out what is using it so I can stop it? I'm using windows 7
> >> professional. Has anyone else had this problem? Dwight
> >
> > Do you unplug the USB to Serial dongle with a terminal program open?
> >
> FYI, "In Use" doesn't mean the port is actively used by another process,
> it means that the /name/ has been assigned and isn't available to assign
> to a new COM device.
>
> g.
>
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