 Over the past few months, I went down the rabbit hole (hah) of @neauoire 's Uxn + Varvara computer, and have re-emerged with an emulator! It's especially fast, written in safe Rust, and runs both natively and in the browser: Here's the full writeup: 24 comments
you joke, but this exercise did leave me wondering whether using a stack-based VM in Fidget could lead to faster evaluation or easier JIT compilation...  @avi @mjk @neauoire What is Fidget? If I did a JIT, UXN is probably what I would target. Alas, the only JIT code that I've ever been able to remotely follow is mupen64_plus's, and that's JITs MIPS to ARM/x86/a few others (register machine to register machine). So there would be a further learning curve to unstackify UXN to ARM/x86/etc. @cr1901 @avi Fidget is https://docs.rs/fidget/ , a JIT for rendering implicit surfaces (among other things!) It's mostly unrelated to Uxn; the only similarity is that both are bytecode-based VMs.   @kapunta Is there a way to check the browser console for errors? @kapunta Alternatively, maybe a permissions issue? https://www.reddit.com/r/firefox/comments/s8hnpc/unable_to_upload_files_firefox_android/     @mjk Wow, that's amazing. I've been away from the internet for a few days, I'm so glad to see this, once I have a bit more bandwidth I'd love to try and build it, I've only tested the js frontend and it runs everything well. I think the only port missing is the expansion port? Trying to run the most complicated rom(oquonie), I get this: panicked at raven-uxn/src/lib.rs:495:26: It should be working now 😎 (I had missed that overflow data from the ROM should be copied into expansion memory, and had to fix a few other issues along the way) @mjk amazing! you've got yourself a varvara computer. I've enjoyed the write up, I was wondering, would it be alright if I added the emulator link to awesome-uxn. If you could improve the docs in any way based on things that tripped you, what would you change or add? 🎉 Adding the link to awesome-uxn would be great! The trickiest part was definitely the audio device; it seems like the docs haven't been updated yet for the current design. Other than that, it was mostly a bunch of small corner cases (some documented here: https://github.com/mkeeter/raven/tree/main/raven-varvara). The demo ROMs were incredibly helpful for bringup + debugging! @mjk Oh these are excellent points for the controller and file io, I'll add these to the varvara docs :) The audio device docs will be updated in the fall, I've fallen behind on this, I meant to make demos and things for it. |
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@mjk @neauoire uxn-fidget next?