I've found out that the parallel port driver code accesses registers 0x3f0
0x3f1. It searches some SuperIO extended function registers. But normally
there should be fdc0 on that address.
So... will the Linux fdc drivers also scan for an device there?
Are the special registers of SuperIO chipsets always at that address?
What is the difference in the reaction of an fdc and a parallel port?
The ideal answer would be "0x3f0 / 0x3f1 are always reserved for the SuperIO
chips, no other driver ever needs them."
Peter Asemann
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