EBSA-285 backplane problem

[Paul Robertson]

I used to have a neat little demonstration of a linux kernel running on SA110 mounting a NFS etc...   The CPU card was an EBSA285 in a "PCI development backplane" from Digital, and a PCI network card (Tulip). The bootstrap code was Russell King's bios1.05 Now something has broken - I am almost certain I have damaged something in the backplane. The system locks up when it tries to access the PCI bus. (Actually I have lots of other reasons to think that the backplane is broken).   My question is what can I use as a replacement? I'm not much of an expert on PCI, but I think that the Digital backplane was performing the PCI bus arbitration, but that if I write a little extra code for the EBSA285, then I can make it a busmaster and use it in a passive backplane.   Can someone help me out please? Many thanks,   Paul Robertson