ao486: x86-compatible Verilog core implementing all features of a 486 SX (2014)
Summary
ao486 is an x86-compatible Verilog core implementing all features of a 486 SX, with an accompanying SoC that can boot legacy OSes on a Terasic DE2-115 board. The repository details its architecture (4-stage pipeline, caches, TLB), peripherals (IDE, floppy, VGA, PS/2, etc.), BIOS/VGABIOS integration, and build instructions, along with licensing notes for included components. The project demonstrates retro-computing hardware emulation in FPGA and reflects a 2014-era open-source hardware effort modeled after Bochs.