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>>The slot number is the same as the PCI Device number. > It is not. And I'd prefer this item to be called a "device #" in EDD-2 to >avoid further confusion. >> In some non-T13 >>documents, the slot number is a combination of PCI Bus, Device and Function >>numbers, > Hm, never heard of that interpretation. Thanks. :-) >> but here it is just the PCI Device number. > I was almost 100% it is. But it does confuse people and results in a >buggy code. >> When the EDD documents (D1386 & D1484) say "PCI slot", do they >>mean the slot # or the device #? >> This actually is a source of confusion among the BIOS writers (and >>now it confuses me as well :-). I myself was sure that the docs atually >>mean the device # (just because you can't get the PCI slot # that simply, >>and there are m/b devices which just don't have the slot #). >> But I know BIOSes that get the matter straight, and return the slot #... >>of 0-- >>I first thought that those BIOSes just don't return anything meaningful >>(partly >>because the same BIOSes return zero-padded Host Bus Type and Interface >>Type fields instead of pading them with spaces) but then it turned out that >>they get the controller's slot # from the PCI BIOS (from the PCI interrupt >>routing table). And as the controller is actually on the motherboard, the >>slot # is 0 (which, er, doesn't help much to identify the controller, unlike >>the PCI device #)... > Well, actually the field name in the IRQ Routing Table is not "slot #" but >a "link value" instead although it is treated as slot # because each PCI slot >in a PC has an unique one. I'm sorry for a little disiformation. There's a deicated field called "slot #" in each routing table entry (there are 4 "link values" per slot) which does correspond to the PCI slot physical placement (and not to the bus/device/ function #'s). It is 0 for m/b devices. Anyway, this makes the reason to change the wording in EDD-2 even stronger. :-) -- Sergei Shtylyov E-mail: [EMAIL PROTECTED] FidoNet: 2:5020/118.24
