Many functions for a keypad 1990. Using fairly easy since
= key function!
Is the keyboard on which I learned in 1990! I remember at the time I was drooling over! Its selling price was approximately 10000F if I remember correctly ... When we watch a Tyros 4 of ajourd'hui or even a PSR S910, it is said that there was a good technological monster in 20 years ...
But I keep this instrument an excellent memory, although it is completely out today!