SUBJECT:

IRQ conflict under Windows 95 with the USB controller installed.

QUESTION:

Why is my PCMCIA NIC assigned an IRQ number which has been
previously used by another device (USB) even though there are still
free IRQs.

ANSWER:

If the OS is Windows 95, according our experience on a note PC
named P6300, manufactured by ASUS and using TI PCI-1131 PCMCIA
CardBus controller, our PCMCIA NIC card will conflict with the
built-in USB controller on IRQ. It will also conflict with another
PCMCIA NIC, on both of IRQ and I/O port. After our analyzing,
this is a bug of the Windows 95 or the P6300 machine itself.
This problem usually occurs in a Win95 system with the USB
supplement installed

You can resolve this problem via manually modifying resources
distribution. The following is the complete procedure to resolve
the problem above:

Step 1. Open the Control Panel/ System/Device Manager,
remove all devices of the NDC, USB and another NIC
and then delete all of the files below before the system
restarts.

1. C:\WINDOWS\INF\drvdata.bin
2. C:\WINDOWS\INF\drvidx.bin

>NDC files: 
3. C:\WINDOWS\INF\netwlan.inf, 
4. C:\WINDOWS\INF\OTHER\NDCNETWLAN.inf

>USB files:
5. C:\WINDOWS\INF\usb.inf
6. C:\WINDOWS\INF\OTHER\MicrosoftUSB.inf

>Another NIC files: (refer to the WIN95 folder of the driver
diskette or ask the vendor of this NIC
to know its exact INF file names)
7. C:\WINDOWS\INF\XXXXXXXX.inf
8. C:\WINDOWS\INF\OTHER\XXXXXXXX.inf


Step 2. Re-install the USB devices(supplement) and manually
change its IRQ value to another available one.

Step 3. Re-install the NDC adapter and manually change
its IRQ and I/O port values to another available ones.

Step 4. Re-install another NIC.