Com Ports

  • Thread starter Thread starter dejotay
  • Start date Start date
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dejotay

It looks like com ports 1 to 8 are pointing to the same IRQ is this correct
or have I done this by accident.
If I have made a mistake and caused this-is there a way to seperate them
back to individual IRQ,
ANy help would be appreciated-thanks
 
dejotay said:
It looks like com ports 1 to 8 are pointing to the same IRQ is this
correct
or have I done this by accident.
If I have made a mistake and caused this-is there a way to seperate them
back to individual IRQ,
ANy help would be appreciated-thanks
Click to expand...

It does not have to be a problem, XP supports IRQ sharing.

Do you actually *have* eight com ports? Are you experiencing some specific
problems related to them?

-pk
 
It does not have to be a problem, XP supports IRQ sharing.

Do you actually *have* eight com ports?   Are you experiencing some specific
problems related to them?

-pk
Click to expand...

This can be caused by the Plug and Play detection of USB to COM
adapters. Everytime either the adapter is connected or re-detected,
Windows may install a different COM port.
 
Yes this look like the case but because I had problems trying to install the
new device which listed port 1-8 the new deviice cannot find a com port to
attach it self to as all ports (1-8) are being used by other applications.
 
My problem is I cannot istall a device as com ports 1-8 are being used ba
other applications
 
dejotay said:
Yes this look like the case but because I had problems trying to install the
new device which listed port 1-8 the new device cannot find a com port to
attach it self to as all ports (1-8) are being used by other applications.
Click to expand...

Here's what I'd try, though I didn't have any ports listed, to remove:

Open Device Manager, click View, Hidden Devices, and see if the ports
are listed. If so, remove them and try the device install again.

Another suggestion I found with a Google Groups search:

http://www.modemsite.com/56k/xptip.asp
 
dejotay said:
My problem is I cannot istall a device as com ports 1-8 are being used ba
other applications
Click to expand...

And does your system *actually have eight com ports*?

If not, reboot, go to Device Manager, and delete the ones that don't
physically exist. Reboot to force re-detection, then try again.

Being used by another application does not mean that there's an interrupt
problem.

It usually means that you've unsuccessfully loaded some software, tried
again and again, and not noticed that it actually did partially launch every
time. Rebooting helps a lot.

HTH
-pk
 
Patrick said:
And does your system *actually have eight com ports*?

If not, reboot, go to Device Manager, and delete the ones that don't
physically exist. Reboot to force re-detection, then try again.

Being used by another application does not mean that there's an
interrupt problem.

It usually means that you've unsuccessfully loaded some software, tried
again and again, and not noticed that it actually did partially launch
every time. Rebooting helps a lot.
Click to expand...

To add to Patrick's post, you may want to read here:
http://support.microsoft.com/kb/323511

John
 
I have tried all the suggestions made but I still cannot resolve my problem.
I agree that all the com porys have bben taken by the same piece of hardware
I am trying to install.
I have deleted the com port (relating to the device) in Device Manager
(which is only visable when the cable is connected) in both Ports (Com & LPT)
as well as in USB controllers, restarted my cmputer, and tried to install
the item again and whereas the system regognises and installs the USB cable
when I try to relate the device to the com port ithe device is not found.
I have found all the com ports which are related to this device in the
registry and wonder if there is a way to unrelate or delete these ports from
here.
I am using Windows xp with SP3.
I wish to thank you and ask that you do not give up on this as I really
appreciate you help.
djt
 
dejotay said:
I have tried all the suggestions made but I still cannot resolve my
problem.
I agree that all the com porys have bben taken by the same piece of
hardware
I am trying to install.
Click to expand...

And that piece of hardware is a......
I have deleted the com port (relating to the device) in Device Manager
(which is only visable when the cable is connected) in both Ports (Com &
LPT)
Click to expand...

How many ports are left when you insert the cable?

as well as in USB controllers, restarted my cmputer, and tried to
install
the item again and whereas the system regognises and installs the USB
cable
Click to expand...

Install the software first, then the hardware.

when I try to relate the device to the com port ithe device is not found.
I have found all the com ports which are related to this device in the
registry and wonder if there is a way to unrelate or delete these ports
from
here.
Click to expand...

Use System restore to a previous date.


It is also possible that the device isn't funcitoning properly, and should
be replaced. Try it on another sytem, try another unit.

It might help if you mentioned what the device is.

HTH
-pk
 
Hi,
I am trying to install a blood clucose meter supplied by Bayer Health Care
wich usually runs in a serial port but now has a USB lead with software.
I have installed the program, then the cable all as per instructions. The
meter has 8 usable com ports but one of those (Com 2) is being used by the
moden.
When clicking device manager/Ports (Com & LTP)/Communicaltions Port
(Com1)/port settings/advanced/com port numbers I find that there are 256
listed.
When RIGHT clicking on comport numbers there is a narrative under 'whats
this' which says about changing the com port numbers and I am wondering if I
have done somtething silly abd destroyed the settings of the individual ports.
The only ports I see (apart from com port 1 and the LTP port) is the Bayer
Port and that is only when the meter is plugged in.
What I need to do is unrelate the com ports to the meter and start again if
that is possible.
Or do you have a beter solution-I do hope so.
 
dejotay said:
Hi,
I am trying to install a blood clucose meter supplied by Bayer Health Care
wich usually runs in a serial port but now has a USB lead with software.
Click to expand...

Ok! USB to serial redirectors are commonplace these days. Be sure to
install any special software before connecting the hardware.

Blackberries use exactly the same kind of software, and often set themselves
up as COM5.
I have installed the program, then the cable all as per instructions. The
meter has 8 usable com ports
Click to expand...

You mean, it can use Com 1 through 8?
but one of those (Com 2) is being used by the
moden.
Click to expand...

So, there are no other physical COM ports built into the system?
When clicking device manager/Ports (Com & LTP)/Communicaltions Port
(Com1)/port settings/advanced/com port numbers I find that there are 256
listed.
Click to expand...

Yes, you can re-identify these as needed. It's no longer the case that
jumpers need to be set.
When RIGHT clicking on comport numbers there is a narrative under 'whats
this' which says about changing the com port numbers and I am wondering if
I
have done somtething silly abd destroyed the settings of the individual
ports.
Click to expand...

Probably not.
The only ports I see (apart from com port 1 and the LTP port)
Click to expand...

Do you mean Com 2 for the modem? Or that there is also a COM1 built into
the system?

In that case, you should set the Bayer software, if needed, to be COM 3, or
4, etc. It really doesn't matter otherwise.
is the Bayer
Port and that is only when the meter is plugged in.
Click to expand...

Yes. These devices create the port only when the software runs. And the
software should be smart enough to determine what ports are not available
and use the next.

Often, you only need to look at this section of Device Manager to be sure
which port it is that the software has decided to use. You may need to
make *no* changes here.
What I need to do is unrelate the com ports to the meter and start again
if
that is possible.
Click to expand...

Uninstall all related software, reboot, and reinstall, carefully following
the installation directions.
Or do you have a beter solution-I do hope so.
Click to expand...

Uninstall the software, reboot. :Look for any references, any Bayer
folders, and delete them, then reboot. Then, carefully re-install the
software attaching the USB device only when directed to by the installer.

Past that, you should contact the unit's support number or link.

HTH
-pk
 
Sir,
Yes-I have carried out your instructions which are as per Bayers
installation guide.
Yes-the meter can use com ports 1-8 but not 2 which is allocated to the modem.
When installing the meter cable it shows as comport 3 but whejn I try to
assigne the meter by using the meter program I get 'Meter not found on this
port-could the meter be at fault? I am goint to try to load this meter on
another computer to see if it works-if it does then I have a problem if it
does nnot I will send it back to Bayer.
Comport 1 is also shown.How do I reidentify the port if I need to?
I f you have any other ideas I would be grateful
Thanks for your continued interest and support
Derek
 
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