metroboy
pandocs
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metroboy | pandocs | |
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19 | 7 | |
1,089 | 1 | |
- | - | |
6.7 | 10.0 | |
3 months ago | almost 4 years ago | |
C++ | Vue | |
- | Creative Commons Zero v1.0 Universal |
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metroboy
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When would you ever want bubblesort?
He wrote a game engine, it renders transparent items using the painter's algorithm, which requires the items to be sorted in Z. He has a routine that iterates over all items to render them, and bubble-sorts the items in-place while iterating over the items (all in the same thread). The "compare and swap" in this case is the innermost functionality of bubblesort.
I assume the author is https://github.com/aappleby but I don't see any obvious candidate for this code. Maybe this? https://github.com/aappleby/metroboy but I can't see why a gate-level emulator woudl need to render transparent items using painter's algorithm.
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Documentation for cycle accurate Game Boy CPU
If you want to go deeper, you can look at the reverse engineered schematic of most of the stuff except the CPU core in the DMG-CPU-Inside project. You could also consult the MetroBoy project, which builds on the previous project and aims to be accurate pretty much down to the logic gate level.
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Game Boy PPU Pixel Pipeine
Well then, here's the ground truth - https://github.com/aappleby/MetroBoy/blob/master/src/GateBoyLib/GateBoyPixPipe.cpp
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GameRoy: a cross platform and highly accurate Game Boy emulator
First I would try to deduce the timing from this gate-level simulation of the game boy, but the master branch was broken at the time, so I didn't manage to compile it. So, I tried deducing it from its underling reverse engineered schematics, but it would take too much time, if it even was possible.
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Is full-speed SNES possible purely in JavaScript?
You might find my hobby project interesting - https://github.com/aappleby/MetroBoy
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The tooling is the language?
Did you know the original Game Boy has non-deterministic behavior? Due to some strangeness in the integrated circuit that provides the CPU and some related parts (the SoC (system on a chip)), the same ROM may behave differently at different times when you'd think it should not. GateBoy is an attempt to make a perfect gate-level emulator for the Game Boy. Its README says:
- Good practices for Batch rendering dynamic quads.
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MetalNES: Transistor Level NES Simulation
Reminds me of GateBoy, which was posted a while back: https://news.ycombinator.com/item?id=28396927, https://github.com/aappleby/MetroBoy
GateBoy runs surprisingly fast for a gate-level simulation.
- Gameboy - Trying to understand Sprite FIFO behavior in the PPU
- Reverse-engineering the Yamaha DX7 synthesizer's sound chip from die photos
pandocs
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GameRoy: a cross platform and highly accurate Game Boy emulator
For Gameboy emulation, one of the most valuable resources are the pandocs: https://gbdev.io/pandocs/
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I finally wrote my first ever emulator (GameBoy)
During the development, these were the main resources I used: * Pan Docs * CPU instruction table * CPU Manual
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Are there guides on how any of the gameboys work (ie how they charge, play games etc) and if not how can I go about learning their structure?
if you just want to learn about how the hardware works, pandocs is the definitive guide to the game boy's hardware, and gbatek helped me a ton when writing my GBA emulator (it also includes some docs on the ds/dsi fwiw)
- A Game Boy Emulator written in Rust
- ¿Les interesaría aprender a programar, emulando un Game Boy?
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[GameBoy] Problem with CD instruction.
Pandocs: https://gbdev.io/pandocs
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Gameboy Graphics Drawing Question
The Ultimate Game Boy Talk has some amazing information in it. In particular, the info on the pixel fifos was brand new to me. You can certainly write an emulator that runs most software without really understanding them, though.
What are some alternatives?
rohd - The Rapid Open Hardware Development (ROHD) framework is a framework for describing and verifying hardware in the Dart programming language.
dmg-acid2 - 😀 The Acid2 test, now for the original Game Boy! 😀
Espeon - Gameboy emulator for the ESP32
Gameboy-logs - Emulation logs of common beginner ROMs for the Gameboy.
mooneye-gb - A Game Boy research project and emulator written in Rust
awesome-gbdev - A curated list of Game Boy development resources such as tools, docs, emulators, related projects and open-source ROMs. [Moved to: https://github.com/gbdev/awesome-gbdev]
SkyEmu - Game Boy Advance, Game Boy, Game Boy Color, and DS Emulator
IronBoy - A Gameboy emulator written in Rust as both a learning exercise and a love letter to the console that got me into gaming.
openmoji - Open source emojis for designers, developers and everyone else!
GB - Game Boy Assembly Programming
pokegb - A gameboy emulator that only plays Pokemon Blue, in ~50 lines of c++.
cgb-acid2 - 😀 The Acid2 test, now for Game Boy Color! 😀