Cannot change Com3 settings at command prompt

Posted on 2006-03-23
Last Modified: 2010-04-26
System is XP Pro.
PC has (4) com ports.  1 & 2 are the standard integrated on mother board.
3 & 4 are via a PCI communications add in board.

Windows recognizes all 4 ports fine and I can change settings accordingly.

However, I have  (4) barcode printers that use the command prompt
PRINT function.  I can change Com ports 1 & 2 via the MODE command
at the C:> but cannot change ports 3 & 4.

When I issue the following:

mode com3: baud=9600 parity=e data=7 stop=1 xon=on

the response is displayed as:
com3   baud=1200

Again, I can change ports 1 & 2 fine, but not 3 & 4.
Windows device manager shows no conflicts.

The main difference I see in the device manager is that
ports 1 & 2 show up as standard ports while 3 & 4 show
up as PCI.

Any thoughts?   Thanks,
Question by:HouseofFara
    LVL 31

    Accepted Solution

    Does the PCI card provide true hardware COM ports? If so, they should be detected by BIOS and shown in the summary screen, including I/O address info and IRQ. This could be some kind of software issue (if  the ports are run by software/drivers) or a resources clash (if something is using the ports).

    Author Comment

    The ports show up under the device manager under PORTS.  The card info states "conforms to PC V2.1 plug and play" and "supports DOS and Windows based software".

    So I am assuming that they are true hardware ports.   Device manager shows no conflicts and that they are working OK.  


    Author Comment

    The PCI card manufacturer provided a new driver and that
    took care of it.   Award the points to rid as he responded and
    mentioned drivers.
    LVL 31

    Expert Comment

    Thanks. Sorry I couldn't be more conclusive. Glad you got it working.

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