Power consumption of Game Boy flash cartridges
I'm genuinely surprised to see Tetris have the lowest power consumption, since unlike the other two games, it does not use the HALT instruction. The HALT instruction puts the CPU to sleep until an interrupt occurs, supposedly lowering power consumption during that time. Most games have it somewhere in their main loop, after they've done the work they needed to do for the current frame, they halt until a V-Blank occurs. Tetris on the other hand busy waits, going over the same 3 instruction loop until the next frame. Most games halt 80% of the time, so now I'm wondering if that instruction ever did anything at all.