X^Y on the Elektronika B3-19M

[Harald]

(08-07-2018 05:23 PM)watchmaker Wrote:  The result of "x^y" differs slightly from the result of "ln"+"*"+"e^x" (unlike B3-21, B3-34!). E. g., 8 | 8 x^y gives 16777188, 8 | 8 ln * e^x gives 16777173. But the same operation with DECIMAL logarithms (8 | 8 lg * | 10 ln * e^x) gives 16777188. Most probably it uses a similar algorithm, directly placing ln(10) in Z.

Thanks for the hint, that is interesting!
So the result is a bit closer to the correct 16777216. I still wonder why you would make the calculation more complicated and loose a register for this minor improvement.
But I guess that is what they must have done.

Cheers,
Harald