chip8-test-suite
Octo
chip8-test-suite | Octo | |
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15 | 8 | |
273 | 653 | |
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7.3 | 5.9 | |
6 months ago | 6 months ago | |
Roff | JavaScript | |
GNU General Public License v3.0 only | MIT License |
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chip8-test-suite
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Show HN: Fortran Chip-8 Interpreter
This is my first emulator. It is still missing a few bells and whistles like the sound timer, but otherwise it passes the basic tests from Timendus (https://github.com/Timendus/chip8-test-suite). I've also been thinking about making a Fortran dialect suitable for CHIP-8 (https://fortran-lang.discourse.group/t/fortran-chip-8-interp...).
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Beginner, intermediate, and advanced c programming projects
Here is a reddit threadfor documentation resources and apparently the r/EmuDev discord has even more. Personally i used wikipedia and youtube to understand what it was & what it should look like (i remember still not getting it at first) and then Cowgod's Chip-8 Technical Reference as main reference for implementing the Instructions and overall architecture (beware that some instructions are missing key details about flag updating and other stuff another source will need to be used). Then the Chip8-test-suite by Tim Franssen was a godsend for the debugging phase. (you can go to Octo and try out some Chip8 games first if you want) also download some game-roms for testing.
- CHIP-8 test suite v4.1 released
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Chip 9 (impossible opcodes?)
Oh and with "test ROMs" I didn't mean "test with more ROMs", but use ROMs that are actually meant for testing 😉 See for example https://github.com/Timendus/chip8-test-suite
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CHIP-8 Emulator in Golang and WebAssembly
The emulator still has issues but it is largely usable. It passes most of the tests in test ROMs that I have found, in particular the ones here. It also has a simple debugger that actually helped me find issues in my implementation.
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Weird Horizontal Offset In My Chip-8 Emulator Display
thanks alot man! i'll now run the roms in chip8-test-suite...
- CHIP-8 test suite version 4.0 is out
- CHIP-8 test suite version 4.0 has just been released!
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[Chip8] Screen gets wacky after splash screen
If you're at this point in the chip8 process, you may be able to run something like https://github.com/Timendus/chip8-test-suite to identify some common issues such as forgetting to set a flag or doing arithmetic operations slightly wrong. Maybe one of these common issues is the culprit.
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Chip8 test ROM showing not showing correct things.
I'd recommend trying this test ROM instead: https://github.com/Timendus/chip8-test-suite
Octo
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Ask HN: Show me your half baked project
1. Octo, a CHIP-8 assembler: https://github.com/JohnEarnest/Octo
P.S. Octojam 10 runs until 12:00 AM PST on November 1st! See the following if you're interested! https://itch.io/jam/octojam-10
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Is there a pointer equivalent of declaring an array?
In addition to what other posters suggested, it could be a good idea to try assembly languages as a way to manually work with locations in memory. Something like Octo could be fun if you want to try memory manipulation without worrying about real-world complexities like syscalls and memory alignment. If you want something extra challenging, you could always try x86 / amd64 assembly. Some C compilers even support inline assembly if you want to mix C and assembly.
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How do I make a "game" for Chip8?
Yes, Octo is the most used tool to create CHIP-8 programs today. John has a little introduction text for writing in its dialect here: https://github.com/JohnEarnest/Octo/blob/gh-pages/docs/BeginnersGuide.md
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Feedback on my very own C++ CHIP8 Interpreter/Emulator
I also want to thank you all for all the advice you gave to me and others about CHIP8. It was very helpful to read some posts here ! I also used John Earnest's OCTO a lot for debugging.
- Octo
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Is chip 8 emulator flicker normal?
The octo FAQ touches on this "pre-xoring" technique, and theres a worked example of doing this data preparation in macros. I've also written varioustools that can handle the xoring for you.
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Executable PNGs
In my own system, Octo[0], I encode programs and their metadata in a similar steganographic fashion in GIF files. As others have noted here, both GIF and PNG offer extension mechanisms and ways to embed "comments", but popular image-sharing sites universally re-encode images and discard this data. The advantage of GIF over PNG (for my purposes) is that I store an arbitrary payload in a fixed-looking image by creating additional frames of animation.
In the past, I've also used a different technique- if you simply concatenate a PNG onto a JAR (which is really just a ZIP archive) you end up with a file that acts like a PNG unless you change the extension to JAR, in which case it acts like a Java executable. This works because the PNG header is at the beginning of the file, while the ZIP header is at the end. Nowadays, though, desktop Java is pretty much dead, so it's a less exciting party trick.
[0] https://github.com/JohnEarnest/Octo
What are some alternatives?
chip8-test-rom - ROM for testing chip8 emulator
vis-chip-8 - Visual Chip-8 Emulator
DEBUG8 - CHIP-8 debugger
jaxe - A fully-featured, cross platform XO-CHIP/S-CHIP/CHIP-8 emulator written in C and SDL.
wasm4 - Build retro games using WebAssembly for a fantasy console.
chip8Archive - A repository of community-submitted Chip8 programs and their metadata
pixload - Image Payload Creating/Injecting tools
chip8 - Simple chip8 interpreter and debugger written in C++
chip8-book - An introduction to Chip-8 emulation using Rust
nature - 🍀 The Nature Programming Language, may you be able to experience the joy of programming.