I've added a new page that discusses colour mapping and error diffusion to a 16 colour palette. This is based on a test kernel I developed back in 2011.
After posting the page, I did notice that there are some strange data errors in the output images (a line of incorrect pixels toward the bottom right corner) but I'm reasonably certain that's just Bochs and I disagreeing on who should be using that memory. The same problem is not exhibited on real hardware.
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