8-bit CPU simulator in C
A digital logic simulation written in C. Contribute to rzscheck/logic development by creating an account on GitHub.
8-bit CPU simulator in C launched on June 28, 2020 with 67 votes, #735 of 4,317 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 6 years on.
In plain words
This is an 8-bit CPU simulator written in C. It's designed for people interested in learning how processors work at a fundamental level. The simulator allows users to write and run machine code or assembly language programs on a virtual CPU, making it useful for education or hobbyist exploration of computer architecture. The project is open source and available on GitHub.
written from the facts on this page · September 2026
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I built an 8-bit CPU simulator in Python from scratchOct 2025 · github.com · ▲72I built a tiny 8-bit CPU simulator in Python to better understand how computers work at a low level. It visualizes registers, memory, and instructions in real-time, so you can actually see each operation as it happens. You can write simple assembly code and watch how the CPU executes it step by step. The project is mainly for learning and experimentation, but I’d love feedback or ideas for improvement.
CPU simulator in 60 lines of code2015 · github.com · ▲60Simple CPU model written in 60 lines of C with 8 registers and basic instructions - wkoszek/cpu60
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- H1Homebrew 16bit CPU from 74HC logic with C compiler and Unix-like OS2023 · sol-1.org · ▲192
This is a 16bit CPU+Minicomputer from pure 74 series logic. It has user/kernel modes, virtual memory, prioritized IRQ's and DMA. It has a full C compiler and a unix-like OS. It's still in development.
We built an 8-bit CPU as 2nd year EE studentsJun 2026 · github.com · ▲108Hi! me and my friends together built an 8 bit CPU implemented in Logisim purely from scratch. The control unit of this system does not implement the generic microcode ROM or any kind of RAM. This was made purely from discrete logic gates and coded the system to run different programs. key features: Custom 16-instruction Harvard ISA, 8-bit fixed format, 4 general purpose registers Hardwired control unit built entirely from AND/OR gate logic matrix Dual-phase clocking to eliminate race conditions Bootstrap Control Unit that cold-boots via ROM-to-RAM transfer Early-exit conditional…
I made a little digital circuit simulator that operates on PNGs2022 · github.com · ▲259This is a little toy project of mine that lets you simulate digital logic graphs. It was inspired by Minecraft's Redstone and the Piet esolang. It's got some serious drawbacks-- you write circuits as PNGs and simulate them with a Python interface. It's slow to run and slow to experiment with. And it is certainly difficult to use for people with any kind of color blindness. But despite that, I hope this can still be a fun toy!
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