RBoy: A Gameboy Emulator in Rust

1. rboy

   1 7 628 4.5 Rust

   A Gameboy Emulator in Rust

   

   For those looking to see an example of the match expressions:

   https://github.com/mvdnes/rboy/blob/9f6b3bc47311ba687326bfff...

   This process of matching on opcode and doing a marginally different version of the same basic few operations on one of a set of registers is something that is _much_ easier to do when you're able to see all the opcodes and activities in a densely packed set of lines like this.

   (The start of the opcodes that I linked are not the best example of this, but they get more regular the further down the file you go. See https://github.com/mvdnes/rboy/blob/9f6b3bc47311ba687326bfff... )

   Beyond knowing that they exist, I haven't explored macros in rust, but I'm curious if they could be of help here. But using cargo fmt, and spreading each of those lines into 3-10 lines would be awful, and would definitely lead to me making mistakes and not noticing typos.

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3. mooneye-gb

   2 5 921 0.0 Rust

   A Game Boy research project and emulator written in Rust

   

4. gba

   3 7 686 7.9 Rust

   A crate that helps you make GBA games

   

   There is a rust port for the game boy advance https://github.com/rust-console/gba

5. Mimic

   4 7 256 3.0 Rust

   A Gameboy emulator written in Rust (by jawline)

   

   I think the core issue here is mainly that a giant match isn't the best way to express opcode tables, and jump tables are just a bit more idiomatic here as in other languages. I've also been working on an emulator for the gameboy in Rust (https://github.com/jawline/Mimic, I wanted to be able to draw gameboy games to the command line) and I think the use of a jump table made it a bunch simpler / easier to refactor (https://github.com/jawline/Mimic/blob/9463b658ebf006b2369d2b...).

6. cerboy

   5 1 2 9.1 Assembly

   my gameboy emulator

   

   I'm working on one too! Just got to the milestone of being able to scroll the Nintendo® logo. I refer to rboy a lot, it's been helpful to see another implementation.

   https://github.com/percentcer/cerboy

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