Need to implement some graphics modes and see what fits in the CPU time we have available.
We could use RLE to get things to fit, but I don't like that, as it will be even worse in the pathological case (black/white checker board). I'd rather it always worked in the worst case.
Also need to think about the horizontal-2x modes. Halve the clock speed of the PIO? Load a new PIO program to do 2x the delays? Load each pixel twice (probably not good from a CPU load and memory bandwidth point of view, given 320x200 wants to use the palette).
Need to implement some graphics modes and see what fits in the CPU time we have available.
We could use RLE to get things to fit, but I don't like that, as it will be even worse in the pathological case (black/white checker board). I'd rather it always worked in the worst case.
Also need to think about the horizontal-2x modes. Halve the clock speed of the PIO? Load a new PIO program to do 2x the delays? Load each pixel twice (probably not good from a CPU load and memory bandwidth point of view, given 320x200 wants to use the palette).