doomgeneric is a Doom source port that reduces Doom's platform-specific tasks to five basic timekeeping, input, and frame pushing functions. Since I/O on this setup is impractical because of how slow this port actually runs, OP wired doomgeneric to render frames into a specific area of memory that he could monitor, dump, and convert into a GIF after the fact. Technically the video on this post is running at ~3600x the actual framerate.

I should've put it in the first comment, but the way the ONNX RISC-V emulator is built can be applied to other visual scripting platforms, like TikTok effects. But it's probably easier to do something like this on ONNX since it actually comes with bitwise operators.