RPN-duino

[Chasfield]

I will have to qualify my previous post regarding being able to fit BigNumber onto the Arduino Nano and drive an OLED display. Compiled sketch code size is fine but RAM usage becomes problematic when BigNumber precision is turned up. So far, with anything over 12 decimal places set, I start to run into stack/heap capacity issues. 12 decimal places is fine for displayed precision but my code relies on having so many digits available that I don't have to worry about storing exponents, only entering and rendering them. 20 digits was big enough for the real world but 12 is a bit pinched and not much use for very small values that are packed with leading zeros.

I have expunged as much static data as possible and am de-nesting procedure calls but so far, 12 digits is the stable limit.

2k ram is not what it used to be.