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com port has no resourses

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by complore

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A once active Comport 2 is now not working properly on IBM Thinkpad 770x laptop, OS Win 2K. Although it is detected in the Device Manager it is reading as not working properly. The reousrces listed after clicking on the CHANGE MANBUALLY button in the properties dialogue box of the comport 2 driver, are as follows:

INPUT/OUTPUT RANGE 03E8-O3EF REading OK
INTERRUPT REQUEST 04 NOT OK.

on selecting the interrupt request the following text appears:

INTERRUPT 04 USED BY INFRARED

How may I rectify this and get back all my ports working/How can I further pinpoint the problem?

10 replies

by thechas

What the data is telling you, is that the COMM port and the IR port are attempting to use the Same IRQ.

If you are not using the IR port, remove it from device manager, and disable the IR port in BIOS settings, or as recommended by IBM.

If youare using the IR port, then you need to find a free IRQ to move one or the other to.

You can look for free IRQs in device manager.

On my XP machine, in device manager, click on view, and then by resource.
Expand the IRQ branch, and see if youhave any free IRQs.
If so, move either port to the free IRQ.

If not, try removing one or the other from device manager, and re-booting.

Windows should enable IRQ sharing, and set up one or the other on a different IRQ.

Another thought, make sure that IBM does not recommend dissableing COMM2 when using the IR port.
Often, to save resources, devices that the mfg does not expect users to use together share resources, and cannot normally be used at the same time.

You also may need to set the IRQ for either device to a different IRQ in BIOS settings.

Chas

by fenaikh

Download and install the "ThinkPad Tools PS2.EXE" from IBM
From DOS or DOS prompt (windows) run it.

1- for both serial:
ps2 sera address 1
ps2 sera enable
ps2 sera address 2
ps2 sera enable

Reboot

2- for a Serial and INFRARED

ps2 sera address 1
ps2 sera enable
ps2 ir address 2
ps2 ir enable

Reboot

Good luck

Mohamed

by fenaikh

Hi
please read more detail at before you do any thing.

Good luck

Mohamed

PS2.EXE COMMAND REFERENCE

http://tpctl.sourceforge.net/PS2-ref.txt

***Very Important NOTE *********
After you copy the URL a space or a %20 maybe gets inserted in the URL when you paste it into your browser. Delete any spaces or such characters from the URL for the page to be loaded.
***Very Important NOTE *********

by fenaikh

Hi
please read more detail at the address below before you do any thing.

Good luck

Mohamed

PS2.EXE COMMAND REFERENCE

http://tpctl.sourceforge.net/PS2-ref.txt

***Very Important NOTE *********
After you copy the URL a space ora %20 maybe gets inserted in the URL when you paste it into your browser. Delete any spaces or such characters from the URL for the page to be loaded.
***Very Important NOTE *********

by rcom

Check the deivice manager and see if IRQ 3 is available. If so go to the system BIOS and change the interupt. Change to 02F8 and IRQ 3. If I remember to get into BIOS you press F10? Anyone know for sure?

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