Open-source alternatives to ExcelCPU

Digital-Logic-Sim is a digital logic simulator and interactive circuit designer used for building and simulating digital hardware circuits. It functions as a visual editor and logic state visualizer that allows for the creation of complex digital logic models using logic gates, wires, and custom chips. The system includes a custom logic chip builder, enabling the grouping of basic logic gates into reusable components to create layered hardware architectures. Users can monitor these designs through a logic state visualizer that displays signal states and memory values using light indicators an

CS-Xmind-Note is a collection of structured mind maps and conceptual diagrams serving as a comprehensive knowledge base for computer science fundamentals. It functions as an academic reference and study guide, organizing core subjects into a visual mapping of interdependent technical concepts. The project utilizes an XMind-compatible schema to model complex domains through hierarchical nodes and relational concept mapping. This approach allows for the visual representation of technical layers, linking hardware specifications to software abstractions. The knowledge base covers several primary

Computerraria is a digital logic circuit simulator and computer architecture educational tool. It provides a sandbox environment for building and testing functional computer systems by connecting modular logic gates and electronic wires. The project serves as a RISC-V architecture simulator that executes RV32I machine code using virtualized hardware components. It includes a virtualized CPU toolchain that uses containerized systems to compile source code into binary formats compatible with these custom processor architectures. The system covers digital logic circuit design and RISC-V ISA sim

This project is a comprehensive educational framework designed to guide learners through the complexities of systems engineering and low-level software development. It provides structured learning paths that integrate hardware simulation, source code analysis, and project-based exercises to help developers master the foundational concepts of computer architecture, operating systems, and firmware design. The curriculum distinguishes itself by emphasizing direct interaction with system internals, requiring learners to examine and modify existing open-source kernel and driver implementations. By

perf-ninja is a collection of educational resources and curricula focused on CPU architecture, memory hierarchies, SIMD programming, and low-level performance engineering. It provides instructional material and practical labs for identifying and fixing CPU bottlenecks, such as cache misses and branch mispredictions. The project differentiates itself through specialized training in hardware-level optimizations, including the use of compiler intrinsics for SIMD vectorization and the implementation of branchless predicate execution to eliminate pipeline stalls. It also covers advanced binary-lev

Bitwise is a computer architecture education kit and a comprehensive set of guides for building a custom CPU, operating system, and compiler from scratch. It serves as a CPU design tutorial and a practical framework for implementing a unique instruction set architecture. The project provides a custom instruction set architecture toolchain, including resources for creating a matching assembler and compiler. It further includes a hardware development guide for synthesizing computer components and peripheral controllers for deployment on programmable logic devices and FPGAs. The kit covers full

SASM is a cross-platform integrated development environment for writing, assembling, and debugging low-level assembly code. It serves as a unified editor and execution flow for assembly language development across different operating systems. The environment supports multiple assembly languages and their respective toolchains, including NASM, MASM, GAS, and FASM, within a single interface. It features a binary-level debugger that allows for stepping through instructions and inspecting CPU registers and variable states. The project provides a toolchain-based build pipeline and a configuration

pwndbg is a GDB plugin and binary analysis framework designed for reverse engineering, exploit development, and low-level program analysis. It extends the core functionality of the debugger to provide advanced memory inspection and automation tools. The project distinguishes itself with specialized capabilities for heap analysis across glibc, jemalloc, and musl, as well as a comprehensive kernel debugging toolkit for inspecting Linux kernel tasks and slab allocators. It includes an integrated ROP gadget searcher for constructing exploit chains and an LLM-powered debugging assistant that provi

This project is a comprehensive technical interview preparation resource and computer science interview guide. It serves as an educational reference for developers to study core software engineering fundamentals and common coding patterns required for employment screenings. The repository provides detailed guides and references covering data structures and algorithms, networking and security, operating systems, and web development. It specifically focuses on the implementation and complexity analysis of sorting, searching, and graph algorithms. The material encompasses a wide breadth of comp

WLA DX - Yet Another ANSI C GB-Z80/Z80/Z80N/6502/65C02/65CE02/65816/68000/6800/6801/6809/8008/8080/HUC6280/SPC-700/SuperFX/Cx4/SH-2 Multi Platform Cross Assembler Package

Rednex Game Boy Development System - An assembly toolchain for the Nintendo Game Boy and Game Boy Color

Powerful macro (cross) assembler package for several CPUs

This project is an educational resource and reference library designed to teach fundamental data structures and algorithmic problem-solving. It provides a structured pedagogical framework that organizes complex technical concepts into a logical progression, helping learners understand how data is organized, stored, and processed to solve computational problems efficiently. The repository distinguishes itself through a multi-language codebase that maintains parallel, consistent implementations of core algorithms and data structures across various programming languages. It bridges the gap betwe