PCI cofiguration space

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hi,
i was looking through the ide driver in Linux 2.2.16 and found that the code does not use the base address field of the configuration address space to look for an IO port or memory mapped location.
Does this mean that the IO ports of an IDE controller are fixed at (base : 0x1f0-0x170) according to the AT task file. The driver has these values hardcoded as defaults.
 
regards
anurekh

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