From mboxrd@z Thu Jan 1 00:00:00 1970 From: tom_gall@vnet.ibm.com Message-ID: <3999CF3E.561EB9C8@vnet.ibm.com> Date: Tue, 15 Aug 2000 23:16:14 +0000 Reply-To: tom_gall@vnet.ibm.com MIME-Version: 1.0 To: mlan@cpu.lu CC: linuxppc-dev@lists.linuxppc.org Subject: Re: PCI Buses References: <200008151939.VAA00754@piglet.grunz.lu> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Michel Lanners wrote: > > Hi Tom, > > On 15 Aug, this message from tom_gall@vnet.ibm.com echoed through cyberspace: > > Just a stupid question here for those of you that have Mac hardware. Of all > > the Mac hardware in existance right now, all Macs have at most one PCI bus > > right? Hi All, I thank you much for the information. It took me a little bit but as I've been looking at the PCI code I ran across the pmac PCI implementation which definately has support for more than one PCI bus. Where I'm coming from is getting the same thing working on IBM PowerPC hardware for multiple pythons... fun fun fun... Thanks again! > Wrong :-) > > As has been said before, the 9x00 have two PCI busses on two identical > bandit host bridges. > > Also, the 73/75/76/85/8600 have an additional bus called VCI by Apple, > for accessing video in/out hardware, that behaves exactly like a PCI > bus. > > Then, there are newer Macs, with those based on UniNorth having three > PCI buses (AGP counted in). It's definately interesting to hear that AGP is really just another PCI... or at least treated that way. Being PCI/AGP stupid I appreciate the info... if it's just another "PCI" of sorts, doesn't that have performance implications or is that addressed really by the hardware implementation as apposed to the Linux side of things? Regards, -- Tom Gall - PowerPC Linux Team "Where's the ka-boom? There was Linux Technology Center supposed to be an earth (w) tom_gall@vnet.ibm.com shattering ka-boom!" (w) 507-253-4558 -- Marvin Martian (h) tgall@uswest.net http://oss.software.ibm.com/developerworks/opensource/linux ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/