Hi anyone knows how to write a programme that allows us to do 1st, 2nd and 4th runge kutta on HP50g graphic calculator? I found 1 programme onthe internet but it is of another language so I couldn't figure it out. For long questions, I always do it on Excel for the iterations but out of convenience, I would like to have it on the calc as well. Anyone know how?

THANKS!!! Your help will be greatly appreciated.