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by doix
893 days ago
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Why do you believe the registers shouldn't exist rather than them being undocumented/test registers? Having worked in the semiconductor industry, this is pretty common. I cannot even begin to imagine how anyone could insert registers into a chip. First of all, the chip is made by TSMC and it's not like Apple give them their HDL files. TSMC will just get a GDS file which is basically just a file with a bunch of polygons defined. I would go as far as to say that it's impossible to do it at that level given the complexity of chips nowadays. |
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If this is true, why are they implying that it would require inside knowledge? If you understand these might exist, would it not be possible to find these registers via brute force?