Thanks, I just realized that I didn't register that the fx-5800P has a reflective window on top of the display (argh!).
Casio seems to be inconsistent with their anti-glare coatings...my fx-9750GA Plus or fx-9750GII has this anti-glare coating but surprisingly the fx-CG50 or fx-CP300Plus does not (the Classpad especially could do with an anti-reflective coating, though I wonder if it has to to with the resistive touch-screen technology as my Palm pilots have a similar issue).
This goes for display windows as well (more reflective surfaces, with the bonus of trapping dust or other debris under it!). The fx-115MS doesn't have a display window, but the fx-991MS does, and finally the fx-991MS 2nd edition doesn't have it. Noticed this as well with the Sharp EL-W516XBSL not having a window and then it's successor (inferior IMO as they removed the formula memory!) the EL-W516TBSL added it back...I don't know why since contrast suffers as a result.
Still I wasn't aware that the fx-5800P used flash memory, though I guess it makes sense without a backup battery. I like that they went with a AAA battery, as I've had a pretty good run with Eneloops (Alkaline is a completely different story having repaired two calculators that suffered quite a bit of damage because they leaked). I'm a little disappointed that the fx-5800P doesn't at least have complex support on par with the fx-9860 series (eg e^i, although the fx-9860 series doesn't seem to handle complex numbers inside of trig functions).
Edited by MJim, 19 July 2021 - 03:42 AM.