newRPL: Now for 39GS and 40GS! [June 29-2017]

[matthiaspaul]

(06-29-2017 05:16 PM)Claudio L. Wrote:  Please flash and try the new official ROMs for the 39gs and 40gs family:

[...] The main change is that the transcendental functions in the math library were completely rewritten from scratch, replaced mostly with table-free algorithms

I applaud these efforts to target multiple platforms and to shrink the size of the firmware. IMHO, on a calculator, optimizing for size is more important than optimizing for speed.

Do you still target the 39g+ as well?

Besides the larger flash of the 40gs, the only other hardware differences I am aware of are that the 39g+ supports IrDA, the 39gs supports IrDA and 4-pin serial and the 40gs supports only 4-pin serial. Also, the 39g+ is powered by three AAA batteries only, whereas the other two calculators are powered by four AAA batteries, which might require minor adjustments in power management.

Greetings,

Matthias