The PSX GPU is wild
Inspired by some recent reverse-engineering, here are some things I find wild by the original PlayStation GPU: VRAM is a flat 1024x512 16-bit image (555 + 1 bit alpha). You want more than just a framebuffer? Figure out yourself what goes where. Yes, that means you'll need to allocate two framebuffers and double-buffer everything yourself. Quads are common. No “triangles only” business here.…