Peter Asemann wrote:
> 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?
No. See http://home.t-online.de/home/gunther.mayer/lssuperio/ for more.
> 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."
- read-only for fdc.
- write-only for some superio chips (get the Winbond W83877 datasheet and others).
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This archive was generated by hypermail 2b29 : Wed Dec 11 2002 - 13:05:31 EST