CPU — How a computer runs

CPU (PROCESSOR) SIMULATION

▸ Supplying the clock pulses…

▸ Building the PC · IR · ACC registers & the ALU

▸ Addressing the RAM cells (von Neumann)

▸ Wiring the address / data / control BUS

▸ Loading the sample program into memory…

▸ Ready — Online. ✅

Instruction cycle

⚙️ Fetch–Decode–Execute

PC (next instr)—

IR (instruction)—

ACC (accumulator)—

Phase—

Clock ticks—

Viewing—

Notes

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

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Accumulator ACC value over clock ticks ACC