A CPU just repeats one loop forever: FETCH the instruction at the PC address → DECODE → EXECUTE (ALU/ACC/RAM) → repeat. Billions of loops per second (GHz) weave together all software.
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Pick a ‘Scenario’ to load a different program (add / loop / multiply / Fibonacci…) · ⏭ step one clock tick at a time · click a concept (PC/IR/ACC/ALU/RAM/BUS…) for details