Meaning no offense, but I can't think of a single good reason to write a
device driver for one of these cards. (Unless you're trying to do
pattern generation, and an 8255 is a terrible choice for that.) Worse
than that though, there's _no_ standard for these cards' implementation,
so a driver isn't going to be even vageuly portable.
Use i386_set_ioperm() and just bit-bash it in userspace.
> I am just about finished with a device driver for PCI DIO boards based
> around the 8C255 (number may be wrong ;). Specifically this is for the
> ComputerBoards DIO-24H DIO board. I have been using the 'development' major
> #, and I am ready to go about getting it committed into the CVS tree for
> whoever else may find it of use.
>
> Currently the system is used in conjunction with a home-brew card-access
> system, but future could include robotics and related fields.
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