Open source FPGA projects for retro gaming and computing.

FPGA Gaming Cores

Complete console implementations for Sipeed Tang FPGA boards.

• NESTang - Nintendo Entertainment System for Tang Primer 25K, Nano 20K and Primer 20K. My first FPGA gaming project.
• SNESTang - Super Nintendo Entertainment System for Tang FPGAs. Features a RISC-V softcore for menu system.
• TangCore - Unified FPGA gaming distribution for Tang boards. Includes NES, SNES, GBA, Genesis and SMS cores with easy core switching.
• GBATang - Game Boy Advance for Sipeed Tang boards.
• MDTang - Sega Mega Drive / Genesis for Tang boards.
• NanoSPC - SNES SPC music player for Tang Nano 20K.
• SMSTang - Sega Master System for Tang FPGAs.

x86 CPU Cores

FPGA implementations of classic Intel processors.

• 486Tang - 80486 on the Sipeed Tang Console 138K. First ao486 port to non-Altera FPGA.
• z8086 - 8086 FPGA core running the original Intel microcode.
• z86 - A pipelined 80286-class FPGA softcore CPU. (Incomplete)
• ao486-sim - Educational whole-system simulation of the ao486 CPU core and PC architecture.
• 8086 Microcode Browser - Interactive Intel 8086 microcode viewer.

USB & Interfaces

• usb_hid_host - Compact USB HID host FPGA core supporting keyboards, mice and gamepads. Pure Verilog, no CPU needed.
• usb_host_pmod - Dual-socket USB host PMOD module hardware design.

Memory Controllers

• DDR3 controller for Tang Primer 20K - DDR3-800 controller with low latency for Gowin GW2A-18C.
• SDRAM controller for Tang Nano 20K - Simple SDRAM controller with example code. Great starting point.
• DDR3 Frame Buffer - DDR3 frame buffer in Verilog for Gowin FPGA.

Other

• 3dfx Voodoo Demos - Self-contained 3dfx Voodoo 1 (SST-1) demos on Mac/Linux.
• Dieshots - High-resolution processor die photographs.