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From: <ebi...@ln...> - 2002-04-12 07:21:46
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Marty Connor <md...@th...> writes: > On 4/11/2002 1:56 PM Eric W. Biederman ebi...@ln... wrote: > >Marty, given that it is legal to have multiple PCI headers do we want > >to implement that as an option. It would increase our romsize by a > >little but it would create romimages that are much easier to work > >with. > > Eric, I'm not sure what you mean. According to > > http://www.phoenix.com/PlatSS/PDFs/specs-bbs101.pdf > > Page 33, The PCI data structure seems only to occur once, and that is > where the vendor and device IDs are. The PNP expansion header is a > chained structure, but does not have vendor or device information. Maybe > I don't understand what you mean. > > We should probably take this to the etherboot-developers list before > people think we're geeks or nerds :) You mean if my conversation on how to do reliable IDE drive initialization also showed up people would think I was really strange? Anyway the PCI header is defined by the PCI spec not by the BIOS vendors, and is used on non-x86 as well. It's been a long time since I've read the specs, and I will see if I can dig up the information. One of the things I remember is that it is legal to have a ROM that had both x86 code and openbios forth byte codes. I think you can have multiple PCI ID's as well. Anyway more information after I dig. Eric |
