21708a3d58
Fulfill TODO from long ago, I used perf-record (--call-graph dwarf) and detected that add_cycles() was hot enough,
I added 2 optimizations:
- Removed bound checks from array accesses
- Increase the LUT size to include dummy entries for open-bus to eliminate the if check
run_60_frames time: [183.65 ms 183.69 ms 183.73 ms]
change: [-9.4414% -9.2849% -9.1315%] (p = 0.00 < 0.05)
Performance has improved.
Former-commit-id: 1cbb596b856e604ad6c48eb0d47771e7cee44d1e
Former-commit-id: 9f15e35237f343d0c816fd9d51d81081736d9e17
|
||
|---|---|---|
| .github/workflows | ||
| .vscode | ||
| assets | ||
| bindings/rustboyadvance-jni | ||
| core | ||
| external | ||
| fps_bench | ||
| media | ||
| platform | ||
| .gitignore | ||
| .gitmodules | ||
| .travis.yml | ||
| Cargo.lock | ||
| Cargo.toml | ||
| LICENSE | ||
| README.md | ||
RustBoyAdvance-NG
Nintendo GameBoy Advance ™ emulator and debugger, written in rust.
WebAssembly Demo: https://michelhe.github.io/rustboyadvance-ng/ 
Project Structure
core/- Main emulator cratebindings/- Bindings to other languages. Currently only java binidings through JNI.platform/- Constains executables & application built withrustboyadvance-coreplatform/rustbodyadvance-wasm- Web emulator powered by WebAssemblyplatform/rustbodyadvance-sdl2- Desktop application built with sdl2platform/rustbodyadvance-minifb- Desktop application built with minifb, not maintained.platform/android- A PoC Android application.
Progress
Emulation Todo:
- CGB audio (4 wave generator channels)
Build and usage (Desktop Application)
To get started, you need to get a stable rust toolchain.
Linux build dependencies
Install SDL2 dependencies
sudo apt-get -y install libsdl2-dev libsdl2-image-dev
Windows build dependencies
SDL2 runtime binaries are included in this repository, no extra setup needed.
Build & Usage
You need to obtain a gba bios binary. An open source GBA bios is also available and supported.
Place the bios file in the repository root and name it gba_bios.bin (or alternatively use the -b command line option)
Build and run in release mode (performance is terrible in the dev profile)
$ cargo run --release -p rustboyadvance-sdl2 -- path/to/rom
You can also drag&drop rom files or any zip files containing .gba files inside into the emulator window and a new rom will be loaded.
Key bindings
Currently the key bindings are not configureable.
GBA key bindings:
| Keyboard | GBA |
|---|---|
| Up | Up |
| Down | Down |
| Left | Right |
| Right | Right |
| Z | B Button |
| X | A Button |
| Return | Start |
| Backspace | Select |
| A | L |
| S | R |
Special key bindings
| Key | Function |
|---|---|
| Space (hold) | Disable 60fps cap |
| F1 | Custom debugger (requires --features debugger) |
| F2 | Spawn gdbserver (experimetnal, requires --features gdb) |
| F5 | Save snapshot file |
| F9 | Load snapshot file |
Android Application
The android project is placed inside platform/android.
To build it, open it with Android Studio.
You also need to set up rust to build android targets with NDK.
TODO - instructions
More Screenshots
Links and attribution
- ARM7TDMI Technical Reference Manual Technical Reference Manuals are fun.
- GBATEK A single webpage written by no$gba developer Martin Korth. This page has pretty much everything. Seriously, it's the best.
- TONC A comprehensive GBA dev guide that I used a-lot in order to understand the GBA system. Comes with neat demo roms that really helped me during development and debugging.
- NanoboyAdvance A GameBoy Advance emulator written in C++17 by a nice person called fleroviux. I've used this for debugging.
- Eggvance gba-suite Incredible test suite for the arm7tdmi interpreter that I'm using, written by Julian Smolka.