CASIO fx-3900P memory increasing (with keystrokes) is possible?

[Dave Britten]

Interesting. I know many Casio devices don't have an automatic reset routine when you change the batteries, and they just run with whatever garbage is in memory, often showing an absurdly high number of free bytes. The fx-3900P looks like it's from the era where Casios needed a manual press of the reset button after installing batteries. I would be very surprised if this actually increases the amount of usable memory.