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Two's Complement is a topic that seems to resurface at least twice a year somewhere. The representation of negative integers, which can then functionally perform subtraction as addition at the binary level, is simply fascinating.

You either live with the fact that it just is that way, remember how it's done, and then promptly forget it again since you never really need it in our modern world.

Or you're among those enthusiasts who like to experiment on their own hardware (simulated or real) and delve into why negating all bits and adding 1 mathematically just works.

Michael Doornbos, aka @mrdoornbos, has recently done this, and even though we've repeatedly included explanations on the subject in our magazine, his version A gentle Introduction to Two's Complement is worth mentioning.

Need to fill a knowledge gap? Then here's your chance.