Yet another NES emulator, a small project with two goals:
- learn a bit of Zig
- get it to pass AccuracyCoin with disregard to quality/performance
Requires Zig 0.16.0.
For the actual executable
zig build raylib --release=fast
# in the default zig-out/bin dir
./zig-out/bin/nessie-rl <path-to-.nes-file>Running the AccuracyCoin harness (headless runner, reports test failures):
zig build accuracycoin
AccuracyCoin: 138/138 passed, 0 failed, 0 incomplete after 4670 polled frames| NES | Keyboard |
|---|---|
| A | X |
| B | Z |
| Select | Right Shift |
| Start | Enter |
| D-pad | ↑ ↓ ← → |
| Pause emulation | P |
Main executable uses Raylib for video/audio/input.
This project contains code generated via agentic coding, examples can be seen in:
- repetitive structural code (instruction tests in
system.zig) - dmc/ppu code, started from handwritten structure and later driven by an agent trying to pass AccuracyCoin tests
The general approach was starting by handwriting core parts (cpu/cart/instructions/bg rendering) and once there was a working base, using an agent to drive experimentation/debugging and fixing AccuracyCoin test cases.
MIT