[aardvark179]

There’s a bunch of things you can do. Replacing all the square roots with a lookup table might be doable, and you could make the final drawing faster by not using the generic plot routines.

You don’t have a lot of memory to play with though as you only have 32k to start with and the frame buffer will use 20k of that, so I’m not sure how good a look up table you could make for SQR.