Walter, do you have the direct line to the engineers or something? You always have these cutting edge finds!!!

Hank, it may save a lot more then the overhead of the isr, you may be able to save a bunch of computations too! That's what I am going for in my brain. Here's my first snag- at 5k, 1 cycle is 200 uS. So how many steps do we need in there? Clearly 250 steps would be a bunch, each step would be 10uS long. In my head, I see each step made up of 255 sections, each section lasting some pre defined amount of time to make up the duty for that step.
So using the above 10uS big step number, we have to do 255 somethings in 10uS. That will be a bit troublesome.
Got any ideas how long we can make a big step and keep the resolution at 5k?