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ARM just licenses the ISA and provides some reference designs. Individual manufacturers can (and often do) add their own extensions and design the actual chips.
by moyix 3y ago
ARM just licenses the ISA and provides some reference designs. Individual manufacturers can (and often do) add their own extensions and design the actual chips.
- SV_BubbleTime 3y agoAnd peripherals that have direct CPU and memory access. You could easily design a “backdoor peripheral” to a completely bulletproof CPU.