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CPU Atlas

By @aserdargun. What the processor does with your code, cycle by cycle.

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The path of an instruction in 3D: program counter, decoder, registers, ALU and memory.Open on its site
Screenshot of CPU Atlas on its original site, taken on October 25, 2026. The lab belongs to its author; we only link to it.

What it is

12 lessons that go from bits and gates to the physical layout of a chip, with RISC-V examples you run in the browser cycle by cycle, watching the instruction move through the pipeline.

  • 12 lessons
  • RISC-V examples in the browser

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