It is probably being used in the same way as port 0xED. Some BIOSes use that address a a "IO delay" port (or possibly pseudo-serializing). They use this port instead of 0x80 so they don't contaminate their port 80 cards display. A write to this port will give them a ~1us delay. See some information in this thread:
http://lkml.indiana.edu/hypermail/linux/kernel/0203.1/0826.html On Wed, Apr 29, 2009 at 4:29 PM, Timothy Normand Miller <[email protected]> wrote: > We're having a boot problem with OGD1, and we see millions of accesses > to I/O space address 0xEB. I'm not aware of that mapping to anything > graphics-related, and we're not sure that what we're seeing on the bus > isn't bogus. What would 0xEB map to? > > -- > Timothy Normand Miller > http://www.cse.ohio-state.edu/~millerti > Open Graphics Project > _______________________________________________ > Open-graphics mailing list > [email protected] > http://lists.duskglow.com/mailman/listinfo/open-graphics > List service provided by Duskglow Consulting, LLC (www.duskglow.com) > _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
