COM Problem !

[Bodin Dominique]

I've got a big problem with a com port use !
A dos prog made to tests com ports works well for a long time, under pure dos and under console too.
On a new installed windows98 the com works well under pure dos, well under windows but not at all under console dos ! ?
I just took another hd also installed under windows98, put it into place and changed nothing else ! All works well !
The com port are always available !
Does someone had this problem and what is the solution ?

Thank's.

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[Lance Edmonds]

There is not enough information to suggest an exact cause.

For example, it could be an interrupt conflict caused by PnP hardware settings, or another APP has the modem "open" (such as MSFAX, etc).

On the problematic installation, can you use the COM port with other DOS _and_ Windows applications?



------------------
Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Bodin Dominique]

Hello,
No other software is running, no modem installed, no conflict at all in windows system's configuration pannel!
Just a new installed windows98 with the default params in place.
The interrupt under the bios settings are not changed when we change the hd and are ok but with one disk all is ok, and with the other not !
Very strange thing, very very !

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[Lance Edmonds]

At least this confirms the problem is not PowerBASIC... something has to be wrong with your Windows installation.

------------------
Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Gustavo Asplanatti]

Dear friend:

Your must stop windows from loaded its driver for that serial port
(the one
the modem uses. If you do not Windows will virtualizes
(well fail's too) the serial port.

To do this use the Device Manager to disable this port in all
hardware profiles. It is recommendable that "reserves" the IRQ of the port series that you want to use (usually 3 or 4).

Also, make sure that the IRQ is not redirected/Re-used by any other
device.
Usually you can run your BIOS setup program and set the IRQ 3/4 (whatever the modem uses) to
ISA and not PCI/AUTO.

Hope this helps.



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Gustavo Asplanatti
[email protected]

[Bodin Dominique]

Thank's for the answer, but i have no modem at all !
I've setted the irq manualy into the bios, and didn't let them in auto. The problem remains !

What do you mean by virtualize ?

Thanks.

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[Gustavo Asplanatti]

You should:

1 - Run the BIOS SETUP and choose the option PNP/PCI CONFIGURATION, in the option (Resources controlled By) you should choose the manual option; lastly in the options of IRQ-3 and IRQ-4 (COM 2 AND COM 1 respectively) they should be assigned as: LEGACY ISA.

2 - Begins the system (Windows) with this configuration and go to the Device Manager in control panel, make double clic in the icon of the PC and reserve the interruptions 3 and 4.

3 - Try again.

This time it should work. (luck)



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Gustavo Asplanatti
[email protected]

[Bodin Dominique]

Thank's a lot for the help,

BUT always the same problem !
Com works under pure dos, too under Windows.
But nothing at all under Dos console !

Don't know what else to do ? ?

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[Lance Edmonds]

What exactly happens? Does the OPEN "COMx:" statement fail with an error code?

What COM port & IRQ are you using? What BASE/COM/IRQ does Windows report the port settings in Control panel?

Are there any entries for the COM port(s) in SYSTEM.INI?



------------------
Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[andy pluister]

I just posted a similar problem. I have three machines with fresh default installs of Win 2000. I have a serial com PB for DOS 3.5 compiled program that runs fine from the windows command line on one machine (750MHz) and won't run on two other 350MHz PC's. Did you ever find a solution to your problem?


[QUOTE]Originally posted by Bodin Dominique:
[B]I've got a big problem with a com port use !
A dos prog made to tests com ports works well for a long time, under pure dos and under console too.
On a new installed windows98 the com works well under pure dos, well under windows but not at all under console dos ! ?
I just took another hd also installed under windows98, put it into place and changed nothing else ! All works well !
The com port are always available !
Does someone had this problem and what is the solution ?


------------------

[Lance Edmonds]

Both problems sound like a Windows config or possibly an access rights issue (NT/2000/XP).

Are you logged in as Administrator (or at least as a user with Administrator access rights) when you are running these tests in Windows 2000?

If not, it might simply be a matter of privileges being configured for the user or Process.

I'm running Win2K here, and can access my external modem(s) just fine using the built-in standard serial ports from PB/DOS apps running in a DOS box (NTVDM)... I can even send faxes with PBFax. Hence it's simply got to be a configuration, setup, or access rights issue.


------------------
Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>