COM5 & COM6 is change when initial XP...

[sohot]

I have one system that have 6 COM ports on system, the COM port resource
are:

COM1: I/O port 3F8h, IRQ4
COM2: I/O port 2F8h, IRQ3
COM3: I/O port 3E8h, IRQ6
COM4: I/O port 2E8h, IRQ9
COM5: I/O port 338h, IRQ10
COM6: I/O port 238h, IRQ11

I have install Windows 2000/Windows 98 on this machine, the COM port
sequence is correctly.
The COM5 and COM6 sequence is change when I install the XP finish... The
resource are:

COM6: I/O port 338h, IRQ10 <== Wrong! It must be COM5
COM5: I/O port 238h, IRQ11 <== Wrong! It must be COM6

If I remove them and rescan in device manager, the COM5 and COM6 mapping is
correctly.

COM5: I/O port 338h, IRQ10
COM6: I/O port 238h, IRQ11

What must be done to allow XP to recognize currently COM5 and COM6 mapping
when initial?

 

[Yves Leclerc]

Com ports 1-4 are normally handled by Windows XP default device drivers.
Port 5-8 usually need a special device driver in order to control the ports
correctly (IRQs and DMAs). Make sure the correct XP drivers get loaded.

Y.

 

[sohot]

It is 2 serial port device that use ISA interface, so it didn't need special
driver to config it.

 

[Guest]

----- Yves Leclerc wrote: ----

Com ports 1-4 are normally handled by Windows XP default device drivers
Port 5-8 usually need a special device driver in order to control the port
correctly (IRQs and DMAs). Make sure the correct XP drivers get loaded

Is there any way to reassign Com 1 or Com 2 to another com? Right now Com 3 is taken by the internal modem on my Dell laptop, and Com 5 is used by a USB/Serial adapter. I have a datalogger that will only read Com 1 or 2, so right now I'm unable to use it with my Dell. I have no idea what is currently using Coms 1 or 2, as they don't show up in anything I've tried yet (probably haven't looked in the right place). On my old Thinkpad, under Win98, I was able to shift the com assignments around w/o too much difficulty (although no where near as easy as with Win3.11), but so far with WinXP, I haven't been able to figure out how to do the same. Can I? And if I can, how

-Barr