JDW: Is it pure mischance that you have twice mentioned the 'IIci' adapter in the SE/30? As far as I know the IIsi PDS-to-whatever adapter and the IIci cache adapter (in fact, a IIci PDS-to-whatever adapter) are not electrically the same. This seems to be supported by the Universal PowerCache 030 accelerator's ability to plug straight into a IIci's PDS slot, but its need to have an interposed adapter in just about every other case. The SE/30 needs a IIsi PDS to IIci PDS adapter just as is used in the IIsi. The IIcx needs an 030 socket to IIci PDS adapter, and so on, and on.

Or did you have some special wrinkle of architecture to explore?

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