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I don't know, and assume you already did, but what happens when you rollback your changes?
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I did not do a rollback. But the question was rather how to test a Cyclone device. The backgrund story was only example what can be occure in that situation.
Every electronic device has a lifetime span, maybe it gets a damage during the normal working situation, and sometimes it is necessery to make a "selftest" somehow, to avoid loosing developement time due to defect gates.
I could write a code with more thousand or million of XOR gates to check whether the coming out result is expected, but don't belive there is no already working solution for that problem.
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