Re: LANANA: To Pending Device Number Registrants

Jonathan Lundell
2001-05-16T15:25:10Z

At 4:57 PM +0200 2001-05-16, Vojtech Pavlik wrote:
>On Wed, May 16, 2001 at 07:37:45AM -0700, Jonathan Lundell wrote:
>> At 10:02 AM +0200 2001-05-16, Vojtech Pavlik wrote:
>> > > It's also true that some buses simply don't yield up physical
>> >> locations (ISA springs to mind,
>> >
>> >ISA is quite fine, you can use the i/o space as physical locations.
>>
>> I meant physical not as in physical-vs-virtual addresses (all ISA
>> addresses, memory or IO, are physical in this sense, by the time they
>> get to the bus). Rather, I meant that you can't determine which slot
>> a given device is plugged into. If you have two NICs in two ISA
>> slots, there's no way to distinguish between the slots. In practice,
>> you'd have to experiment or remove a card and check the jumpering or
>> some such.
>
>Yes. But I meant that while this indeed is not possible, still the i/o
>port address can be used instead of the slot number, because it at least
>is physically jumpered and must be unique.

Yes, I agree. And it's stable (whereas "physical" PCI addresses are
not). Best we've got for ISA (though it's true for ISA memory
addresses as well).

--
/Jonathan Lundell.