z386: An Open-Source 80386 Built Around Original Microcode

This post discusses the z386, an open-source FPGA CPU designed to replicate the original Intel 80386 microcode. The z386 can run real software, including DOS and classic games like Doom, and is a blend of educational reconstruction and practical FPGA CPU design. The author compares its performance against the ao486 and outlines its architectural features such as caching, instruction prefetch, and other design aspects.