Actually, I was thinking the major issue was correctly handling alignment
constraints on PCI-PCI Bridges (PPB) that may exist behind the hot-swap. You
have to have the PPB addresses aligned on a 1MByte boundardary, and they can
nest. You make a PPB hot-swappable, all of the sudden you have a bunch of
cards which come in all at the same time behind the bridge and have to be
allocated out of unused, contiguous space with a minimal address granularity
of 1MBytes.
Is there anything preventing a PCI expansion unit from being hot-swappable?
I haven't had a chance to read the hot-swap PCI specification, so I don't
know off the top of my head. It should be possible.
-Bret
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SBS Technologies, Connectivity Products
... solutions for real-time connectivity
Bret Indrelee, Engineer
SBS Technologies, Inc., Connectivity Products
1284 Corporate Center Drive, St. Paul MN 55121
Direct: (651) 905-4731
Main: (651) 905-4700 Fax: (651) 905-4701
E-mail: bindrelee@sbs-cp.com http://www.sbs.com
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