CoreTrace, a visual 16-bit CPU simulator

What it does

CoreTrace is a free, browser-based 16-bit CPU simulator. Write assembly code, step through instructions, and watch the Control Unit, ALU, registers, and RAM animate in real time. Perfect for learning computer architecture, assembly language, and CPU design.

In the maker’s words, at launch

I built a 16-bit CPU simulator that runs entirely in the browser. You can write assembly, run it, or step through it one instruction at a time while watching what happens inside the CPU. It shows the registers, memory, flags, ALU, buses, and datapath as the program executes. You can also set breakpoints, inspect…

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