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RE: Simple PCI Motherboard

> 3) no need for a host bridge or a host processor because a host
>     processor  will be on one of the addin card.
> Some of the extenders out there will do the job, but the 
> request/grant/
> IDSEL traces need to be cut.  And they don't have the slot connectors.

Rather than kludge something together, why not go with a PICMG (PCI
Industrial Computer Manufaturers' Group) passive backplane PCI/ISA spec.
There are many supplier options.  See http://www.picmg.org/

Brooks Lame'
Crisis/Design Engineer,  Motorola Monterey Design Center