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Reminds of when I was doing firmware development and the ASIC team would ask if they could toss in a extra Cortex-M3 core to solve specific control problems. Those cores would be used as programmable state machines. For the ASIC team tossing in a extra core was free compared to custom logic design. However for the firmware team it would be another job to write and test that firmware. We had designs with upwards of 10 Cortex-M3 cores. I've heard from a friend at another employer had something like 32 such cores and it was a pain to debug.

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