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I can see how that would be difficult for low level emulation, but does it really matter for HLE?

Retail games running on the PS4 don't care about the PCIe topology, they just use Sony's function call APIs.

There are various ways they could be made to care, e.g. wrapping a function call in a macro that expands with some sort of assertion about hardware state. But I'm guessing that if they were told to design emulation counter-measures, it was to defeat hardware emulation and not WINE-style library shimming.

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