z386: An Open-Source FPGA 80386 Driven by the Original Intel Microcode

Original: This article is an independent of “z386: An Open-Source 80386 Built Around Original Microcode” by nand2mario, published on Small Things Retro on May 23, 2026.

All hardware research, RTL design decisions, performance measurements, block diagrams, die-shot annotations and benchmarks belong to the original author. Three of the original images (Doom II screenshot, 80386 block…

https://core-jmp.org/2026/05/z386-open-source-80386-fpga-microcode-rewrite/