Casio College fx-80 : which IC hides inside ?

[Thomas Radtke]

(06-28-2016 06:30 PM)matthiaspaul Wrote:  I own a modified Casio fx-180P with hyperbolic functions retrofitted.

Comparing the functions of my fx-180P calculator with a friend's Casio calculator of the same time (I don't recall the model number any more), I realized that although both calculators looked completely different and had a rather different keyboard arrangement, the functional assignments for each of the keys were the same.

Presumably the fx-3600p.

Sold my TI-25 to get the 180p back then to become one of few students with a programmable calculator .