Jay,
I do expect to now ahead of time. I expect to solve differential equations using an 8052 or a few in parellel. In fact one of the programs I'm working on rite know is to steer a bicycle. The idea is to calculculate the corective forces neccesarry. I havn't come up with the exact differential equations yet. But I have made simple models that simulate stick motion. It should be relitivly simple to change the program to use a rigid wheel. Come to think of it, maybee the whole bicylce could be put in easily.

Even if the equation is known ahead of time assembling the equation might help get rid of mistakes. A stack pointer might help.

The reason I'm doing the bicycle program is to get practice writing a long program. I did finally figure out how load values into the b register.