irq conflict with PS2 mouse/IDE controller

I upgraded a system from Win98 to Win98SE, and added a slave HDD.
Now the PS2 mouse does not work.  There is an irq conflict between the PS2 mouse and  the Standard IDE/ESDI Hard Disk Controller.  Both are attempting to use irq 12.
Neither will allow me to "Change Setting" in device manager.
Any advice on how to resolve this would be appreciated.
carrot999Asked:
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gonzal13Connect With a Mentor RetiredCommented:
http://www.experts-exchange.com/Hardware/Q_10017964.html?query=ps2+port&clearTAFilter=true

I would suggest a serial mouse after what I have read. Hopefully the above sites may give you an insite.

gonzal13(joe)
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gonzal13RetiredCommented:
Did you try to remove the mouse device and let the PC try to find it? I check in the device manager for the mouse and it does not list an IRQ address.

the other is to remove the HD and let the PC find it.

Gonzal13(Joe)
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carrot999Author Commented:
Thanks gonzal13, but unfortunately neither removing the mouse device nor removing the slave HDD worked.
When I attempt to start the computer with the PS/2 mouse plugged in, I get the message:
"Windows did not detect a mouse attached to the computer.  You can safely attach a serial mouse now.
To attach a PS/2 mouse port, you must first turn the computer off."
I have tried 2 different PS/2 mice, both I know to work on other computers.

Any other suggestions?
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gonzal13RetiredCommented:
See if in the bios if you are able to establish two ps2 ports. this came from a microsoft database.

gonzal13(joe)
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carrot999Author Commented:
WOW...thank you do much for all the help.
I checked the BIOS but I couldn't see any way to define a 2nd PS2 port.
I read all the articles/solutions you sent and did lots of checking and troubleshooting.
As part of this, I checked the PS/2 port itself and its connection with the motherboard.  It now works!
Thanks again for all your assistance.
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gonzal13RetiredCommented:
I am glad i could help you. It makes me feel good.

Joe
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