off chip that was on one prototype board. However, this appears to be
a design that many chipsets are compatible with its PPEC register set
(eg the Omega 82c094). Through the kindness of the Red Hat developer
David Woodhouse, I now have this datasheet.
I may take the advise of one of the bsd-nomads (whose name
unfortunately escapes me at the moment) and split out all these 16-bit
I/O mapped PCI devices into a separate driver...