Playdate高价与优化技巧引发的替代需求

原话 · @Anonymous

I just wish someone released a clone. The "computer" is worth like 5$. I've enjoyed programming and porting my 3D game engine to 20$ ESP32 devkits among others, and am looking for more "crazy" platforms. But I don't even want to touch playdate due to its pricing stance, even though my office has an unused one in the store room.

原话 · @Anonymous

That reminds me of some of the tricks I've used while tinkering with a voxel space rendering tech demo on the PlayStation. The quirks of that console for this is that the CPU takes a 6 cycle stall on any read from main RAM (it's not even stall-on-use) and doesn't have a data cache. That would make it a very poor fit for this, so I had to improvise a bunch of tricks to reclaim performance:- Made all of my hot loop fit within one function, so that it fits entirely in the 4 KiB direct-mapped instruction cache (so less than 1024 instructions)- Wrote a C++ template that can trampoline a function call into the 2 KiB scratchpad- Used the rest of the scratchpad for a CLUT table because it doesn't stall on read- Used the GTE to transform the N set of coordinates while the CPU stalls fetching the N+1