What was the 1st CAS pocket calculator?

[Csaba Tizedes]

(02-09-2017 10:57 AM)xerxes Wrote:  The first CASIO able to do symbolic manipulation was the FX-5500 from 1986.

Hi, please, post here how it was works? Maybe you have a manual for that calculator? I'm a big CASIO fan (sorry, guys), so this is really interesting!

BTW what it means CAS exactly?

I wrote a little Periodic table for my CASIO fx-850P and this program used VALF() function. The chemical symbols are stored in a vector M$() and the atomic weights in M(). The program cuts the chemical formula and substitued all chemical symbol with their atomic weight like this: "H2SO4" --> "M(1)*2+M(16)+M(8)*4" and after on that string I used VALF().

This is a really simple manipulation of a chemical formula to mathematical formula. This is required to eliminate parts of the formula and generate another mathematical one. But not part of the ROM.


Csaba