Online calculator simulators?

[rprosperi]

(07-09-2022 02:15 PM)jonmoore Wrote:  All of HP's post Voyager calculators agree on their result, and as one one expect the 11C and DM41x agree with the 15C.

All HP (made) calculators that came after the 71B (1983) used the same low-level Saturn math libraries, essentially unchanged. These were indeed created with heavy influence by (if not actual involvement of) Dr. Kahan, and initially comprised the first IEEE FP math standards. This does not apply to machines that were re-implemented by Kinpo, etc. for 33S, 35S, etc.

(07-09-2022 02:15 PM)jonmoore Wrote:  And then I thought, what the hell, lets input the the calculation on the Casio CG50 - 8.999999998, Casio fx-991ex - 9.000000007, and the TI-nspire CX II - 8.99999998177 (this agrees with the TI Voyage 200).
[snip]
There's nothing particularly scientific or robust in these findings but I do find it interesting in terms of some of the 'truths' we hold onto ref Mr Kahan and BCD, which aren't necessarily as true as they once were in 2022.

I don't disagree but do recall that all of these machines are 30+ years newer, so it's not surprising that they eventually improved things. I still hold his contributions as unique, significant and insightful, and likely the very impetus for competitors to try harder. Of course the ever-dropping price of silicon made it somewhat easier by simply growing the CPU, memory, etc.