A poser for our Mods

Based on the suggestions in the KT4 Ultra FAQ thread, I've spent many hours with WPCREDIT and WPCRSET, mainly to my satisfaction.  The question I have is this:
Since the primary purpose of the BIOS is to populate the PCI registers, I'm wondering if there are registers set by the BIOS that we cannot see in WPCREDIT/WPCRSET?  If there are hidden registers, is there any way to get at them?
I realize that such questions and their related answers may lead many users astray.  If our Mods think I'm delving too deeply, I understand.
TIA
The Captain

WPCREDIT should be able to view the registers by the bus ID, device ID and function ID, which covers all. However, not all registers are Writable. Some are only Read-Only but are writable during POST. Maybe this answers your question.

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    When using a storage space in a cluster, I have seen various articles suggesting that each csv will be active/passive within the cluster.  Causing redirected IO for all cluster nodes not currently active?
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