Note G
en.wikipedia.org
en.wikipedia.org
https://rclab.de/analyticalengine/lovelace_noteg_paper
And the text by the author of that emulator about the authenticity of the emulator:
https://www.fourmilab.ch/babbage/authentic.html
Note that the sizes of what we would today call "registers" in what we would today call "ALU" were, per 1837 description 40, per 1864 description 50 decimal digits, much bigger than the number of mantissa decimals in common "float" (7) or "double" (15) floating point representations, and the assumption of the engine was to use fixed point decimal arithmetic.
One tidbit:
> Her mother was anxious about her upbringing and promoted Ada's interest in mathematics and logic in an effort to prevent her from developing her father's perceived insanity.