From: <email@example.com> However, I can't totally accept your second point for a couple reasons which I'd gladly abandon if you can elaborate on what you wrote. First, the 'tagged' memory is a hardware fact; the tag bits physically exist. They might be manipulated by software, I can't ultimately prove or disprove that though I don't doubt it nor would I argue that you can't do it; but 'tags active' is a PPC processor mode and that mode affects instruction execution related to those bits. ===> true enough, but the pointer protection is pure software. My (small) point was just that the much hyped AS/400 security is a software function (and as such can be easily circumvented). The old CISC system was much safer in this respect as the protection was much closer to the hardware.
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