(48G 49G 50G) Runge-Kutta Diff Eqn solver

[BINUBALL]

@ is program comment. Although they will disappear after you enter program. On PC, they are not disappear.
Some command including \ is escaping. 50g program can be made in computer. If you have made some programs on 50g. It needs some character that can't write on PC such as ->, <<, >>. So you write \<< on PC and send to calculator, using ascii to binary converter. And \<< converted into <<.

p.s. so \->ARRY is ->ARRY on 50g