Retro computing on the Ulx3s ECP5 FPGA board

Simple 6502 system on a ULX3S FPGA board

USB Serial on the TinyFPGA BX

Z80 + USB + TinyFPGA-BX in Verilog using open-source Yosys+NextPNR

The NitrOS-9 Project for 6809 based computers http://www.nitros9.org

Simple Apple I-inspired 6502 computer in Verilog

VS Code extension for Z-80 Assembly language development for TRS-80 based on the popular trs80gp emulator and the zmac assembler

A FPGA friendly 32 bit RISC-V CPU implementation

Running COBOL on the wild!? No OS required, works with multiboot

32-bit RISC-V CPU in ~800 lines of C89

A modern and customizable python UI-library based on Tkinter

Tiny RISC-V machine code monitor written in RISC-V assembly.

Suite of TRS-80 libraries, tools, and web apps in TypeScript

A simple, end-to-end compiler for the Jack programming language.

The ultimate conclusion of Nand to Tetris

Raycasting game for the Hack computer from Elements of Computing Systems / Coursera NAND2Tetris

Python Parser

multi platform circuit layout and schematic drawing tool

Bitbang SPI with MOS 6502 and 6522

Portable C++ hashing library

FPGA Apple1 with some extras for CycloneIV

Ahead of time compiler for JVM bytecode targetting iOS, Mac OSX and Linux

Virtual Development Board

Example of how to get started with olofk/fusesoc.

VHDL 2008/93/87 simulator

Retro-Computer Designs (Z80, 65C816, etc)

Haskell to VHDL/Verilog/SystemVerilog compiler

Open source version of CVC from Tachyon-DA (http://www.tachyon-da.com/what-is-cvc/)