A JavaScript NES emulator.

The original IBM PC and other machine emulations in JavaScript

Apple II emulator for Windows

Qt-based Nintendo Entertaiment System emulator and NSF/NSF2/NSFe Music Player (Linux, FreeBSD, OpenBSD and Windows)

Compile Java byte-code to native CPU's.

Ultimate Commodore 64 Reference: ROM Disassembly, Memory Map, ...

PCjs Machines 1.0 (archived)

Fully documented and annotated source code for the cassette version of Elite on the BBC Micro

Self-hosting metacompiled Forth, bootstrapping from a few lines of C; targets Linux, Windows, ARM, RISC-V, 68000, PDP-11, asm.js.

Port of LLVM to the MOS 6502 and related processors

Another NES Emulator - written for fun & learning - first implementation of wideNES

Ted Fried's MicroCore Labs Projects which include microsequencer-based FPGA cores and emulators for the 8088, 8086, 8051, 6502, 68000, Z80, Risc-V, and also Typewriter and EPROM Emulator projects. MCL51, MCL64, MCL65, MCL65+, MCL68, MCL86, MCL86+, MCL86jr, MCLR5, MCLZ8, MCL6809

Fully documented and annotated source code for Elite on the Nintendo Entertainment System (NES)

NES/Famicom emulator with network multiplayer

Javascript BBC micro emulator

Integrated Development Environment for the 8-bit Nintendo Entertainment System

Disassembly of the Apple II Desktop - ProDOS GUI

SDK for developing with the llvm-mos compiler

Apple ][ emulator for MS-DOS, written in 8088 assembly

Millfork: a middle-level programming language targeting 6502- and Z80-based microcomputers and home consoles