Pokemon Emerald Ported to WebAssembly (100k FPS) • Hacker News Board

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#61

Post by itsthecourier » Sat, Jun 06, 2026, 7:59 PM UTC

BearOso wrote: post #49

itsthecourier wrote: post #6

some weeks ago I made a Gameboy emulator from zero in rust and then exported it to wasm https://holy-lake-f6df.sdreyesg.workers.dev/ took me 3 hours with Opus. Opus knew the whole ISA, clock, bus quirks, etc. from their training without any external docs

Alternatively, you could have downloaded an existing one. What you did is just a roundabout way of acquiring one of the many WASM Rust GB emulators in the training set. Except it probably now has several problems from reconstruction. You didn't learn anything new from the process. It's just wasteful in several ways.

bro, I learned a lot, I did it step by step and discussed everything with Claude, then used the knowledge to build an emulator at work for a rtos machine (WIP)

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#62

Post by itsthecourier » Sat, Jun 06, 2026, 7:59 PM UTC

tripplyons wrote: post #17

itsthecourier wrote: post #6

some weeks ago I made a Gameboy emulator from zero in rust and then exported it to wasm https://holy-lake-f6df.sdreyesg.workers.dev/ took me 3 hours with Opus. Opus knew the whole ISA, clock, bus quirks, etc. from their training without any external docs

Yes, this project was made in around 15 hours of Codex.

how much docs did you need to supply?

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#63

Post by potsandpans » Sat, Jun 06, 2026, 8:38 PM UTC

astlouis44 wrote: post #59

Really exciting to see more games ported to WASM. For anyone interested, I just did a HN post detailing a port I spent the last 5 days on - Xonotic, an arena FPS. Includes a technical writeup too: https://news.ycombinator.com/item?id=48428133

This is super cool. Do you have any code up in a public repo that I could peek at? I've been working on and off on a static recompiler for playstation games, wasm was kind of my end goal.

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#64

Post by simianwords » Sat, Jun 06, 2026, 8:58 PM UTC

Question to WASM and low level nerds: is this the sort of things LLMs are good at? Since the end verification is stable and conclusive and you can just "goal" this project into existence until this somewhat objective verification is met.

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#65

Post by cadamsdotcom » Sat, Jun 06, 2026, 9:34 PM UTC

So you’re saying I have 1900 Game Boys in my pocket everywhere I go AND don’t have to buy batteries?

AND - I didn’t have to blow air on the cartridge connector for it to work?

Is this the future?

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#66

Post by bottlepalm » Sat, Jun 06, 2026, 10:16 PM UTC

fc417fc802 wrote: post #8

Luc wrote: post #4

https://github.com/tripplyons/pokeemerald-wasm/

How long until this is DMCA'd? How has the project it's based on stuck around for so long? Do I perhaps misunderstand what this is? https://github.com/pret/pokeemerald

I get nervous releasing just symbols for a game and here is a full disassembly. I have no idea how tolerant the rights holders are to this kind of stuff. I guess you just roll the dice, but the power is in their hands how far they take action.

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#67

Post by astlouis44 » Sat, Jun 06, 2026, 10:50 PM UTC

potsandpans wrote: post #63

astlouis44 wrote: post #59

Really exciting to see more games ported to WASM. For anyone interested, I just did a HN post detailing a port I spent the last 5 days on - Xonotic, an arena FPS. Includes a technical writeup too: https://news.ycombinator.com/item?id=48428133

This is super cool. Do you have any code up in a public repo that I could peek at? I've been working on and off on a static recompiler for playstation games, wasm was kind of my end goal.

Thanks man, feel free me to DM me on X if you'd like to discuss further, I am planning to push the code to a repo seeing as Xonotic is an OSS game and requires any changes to also be open sourced. And a Playstation recomp implemented in WASM is interesting to think about!

X link: https://x.com/AlexStLouis10

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#68

Post by orliesaurus » Sat, Jun 06, 2026, 10:53 PM UTC

I crashed opening the Pokemon bag on the first fight

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#69

Post by folkrav » Sat, Jun 06, 2026, 11:05 PM UTC

sergiotapia wrote: post #51

wis wrote: post #47

Cool! I like the speeding up feature. I suggest making the UI indicate that you can press the keys `z` and `x` on the keyboard to trigger the A and B buttons respectively, I figured that out by pressing on my keyboard the A and B keys and then all the letter keys. Btw, it seems there's a crash when you choose "Pokemon" in the "Fight/Bag/Pokemon/Run" menu: https://i.ibb.co/tpVV8q83/poke-fight-menu.png

Z and X are old school emulator keys. I knew right away to use them from the visual boy advance / zsnes days. :D

Funny, I've been emulating games for literal decades at this point, but remapping buttons is one of the first things I did in every one of them, so I never knew the defaults hehe

Re: Pokemon Emerald Ported to WebAssembly (100k FPS)

#70

Post by nosioptar » Sat, Jun 06, 2026, 11:08 PM UTC

I know they're pretty standard controls, but I would suggest letting users remap keys.

Enter is off by itself, so you have to move a hand to press start. Switching to space would solve that.

(I prefer wasd for arrows, and h/j for b/a with y/u or u/I for start/select, but I think most b̵r̵a̵i̵n̵ ̵d̵a̵m̵a̵g̵e̵d̵ right handed people prefer arrows.)