Jeff Walther wrote: > Apologies for missing the point. The MacOS boots fine wtih a PC > 2940UW with PC BIOS on-board installed in the Mac PCI slot. No > problem at all as far as I know or have experienced.
thank you jeff > I don't think that there is any kind of PCI bridge on the E100 card. > I haven't traced out the connections (yet, this LOTTD gets longer and > longer) but it appears that the network portion of the E100 simply > shares the PCI connections which are common to all members of the PCI > bus with the SCSI portion of the card. Then the network portion gets > the PCI connections which must be unique for each slot through that > little tab at the end of slot I don't know if it is a physical bridge or not. The kernel sees it as one, and recognizes both the qlogic scsi chip and the dec network chip, but the drivers present in the kernel do not seem to be able to drive either chip. The kernel also recognizes the dec bridge chip and seems to control anything "downstream" of it fine(video card). I don't have lspci on the machine right now, but it shows some definite strangeness in the pci subsystem. > The hardware supports this, becasue the Bandit PCI controller by > itself probably supports up to 16 PCI slots, and the arbiter chip > which waves baton for the PCI bus definitely supports up to six > devices. So there's room for a hitchhiker like this, as far as the > hardware is concerned. > > The messy part is that the A1, B1, C1 slot designations seem to be > built into the firmware (the ROM) of this generation Mac. So Umax > must have done something tricky to get the Mac to believe that there > is another PCI slot. I read something about a sort of dumby/virtual > E100 slot which supports some legacy thing having to do with > networking, and I think that Umax hooked into that artifact for the > E100 card. In other words, the E100 card takes its name from this > legacy artifact in these machine's firmware which allows the card to > work. > > Kennedy, do you or any of your sources have insight into this? once again the supermac does it again! thanks again guys, tom -- SuperMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | Service & Replacement Parts [EMAIL PROTECTED] | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> SuperMacs list info: <http://lowendmac.com/supermacs/list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/supermacs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
