libdragon

I’m not sure the N64 would be easier. The graphics hardware in the N64 is complicated. In some ways the console is really modern (perspective-correct texture interpolation, z-buffering, subpixel positioning). On paper, it seems a lot like a more modern system. But the hardware complexity is a beast. and the design is permeated with bottlenecks. Half of the graphics pipeline is taken up by the RSP, which is a fully programmable vector processor--sounds cool, but in practice it is unapproachable. 4 KiB of texture memory (and if you use a palette, half of it is the palette). RAM bandwidth is barely fast enough to handle 3D scenes. https://www.copetti.org/writings/consoles/nintendo-64/ The folks working on LibDragon have done a lot of work to make homebrew a better experience, but you’ll note that support for 3D graphics is still only in a pr

Per the Portal 64 creator in the comments of their Patreon, the library in question was libultra,[1] which is owned and was distributed exclusively by Nintendo but has been extensively pirated. There are open source alternatives, including libdragon[2] and libn64[3]. Not sure how feasible replacing libultra with either of those would be considering the scale of the project. 1: https://n64brew.dev/wiki/Libultra 2: https://libdragon.dev/, https://github.com/DragonMinded/libdragon 3: https://github.com/mikeryan/n64dev/