Prime and Saturn calculators

[Didier Lachieze]

(07-05-2024 06:56 PM)Steve Simpkin Wrote:  I recall Cyrille De Brébisson mentioning that they had recreated the Saturn math library in C (or C++)

Yes, this was done for the HP 20b/30b and then reused in the Prime as explained by Cyrille here.

Another nice quote from Cyrille:

Quote: Apart from the 38/48 series calculators, none of the ACO and later calculators are RPL based (starting with the newer 10BII, 17Bs, 32SII, 35...)
They are all developed in C, using a math library which is a "copy" in C of the math library used in the 95LX, which is itself a copy in Intel ASM of the saturn one...
Unfortunately, it is a a rather simplistic implementation, based, somewhat on a virtual implementation of the Saturn CPU. So it is slow as hell...
In 2004 or so, when it became clear that we would be working more and more with ARM chips for low end calcs, I recreated the whole math library in C, but as a recreation based on the code rather than a copy. This library is what is used in Prime and a couple of other calcs...