This Amiga 4000D has a secret:-D

[mboehmer_e3b]

Ah. I smell a rat... nice to hear something from Elbox again...

The PCI specification does not allow passive PCI expanders!

Not correct. The PCI spec 2.1 says:

"5.2.2.: [Planar implementation] Two types of planar implementation are supported by the PCI expansion card design: ... and expansion connectors mounted on a riser card."

These riser cards are also commonly used in small size systems.

So. Quoting on PCI specs:

"3.7.4.: [Generating configuration cycles]... Configuration mechanism #2 is defined for backward compatibility and must not be used by new designs [footnote 21: This mechanism adds a significant software burden and impacts performance when used in a multiprocessor system]."

Hm. How does Mediator handle this? It uses only the config mechanism #2, which is forbidden according top 2.1 specs for new designs... and what does this mean for SharkPPC cards, which sit behind a bridge (which *needs* mechanism #1, btw)?

So, if quoting, Tjaoz, be fair.

Michael

[mboehmer_e3b]

Ah... I smell a Rat again...

There is not such a statement in the current PCI specification.

There is: PCI Specification of PCI SIG Version 2.1s

And that's what Elbox is advertising the Mediator to be compatible with.

AFAIK Mediators support both kind of configuration mechanisms described in the PCI spec: Type 0 and Type 1.

Don't try to confuse people by discussing about numbering.
First one of configuration methods is being routed over PCI-PCI bridges, where as the latter one is limited to one PCI bus segment only (will not be forwarded by PCI bridges).

I'm fair. It is you who quoted PCI specs parts not related to this thread.

You were talking about specification violations. Same for me.

Michael