ln and e^x on the 16C?

[Dave Britten]

I got a DM-16L (to go with my 41L) to keep handy for integer math. It can do some floating point operations, but to say it's limited is an understatement; floating point mode has barely more functionality than a four-function with square roots and scientific notation.

If I could add some programs to calculate ln(x) or e^x, then I could at least get powers and roots in place for those occasions when it's needed. Before I go reinventing the wheel (with a clumsy Taylor series or something), has anybody already tackled this problem on the 16?