When pressing any key, calculator says: "Error! Press any key to turn unit off. Then turn unit back on". But it does not do anything. - TI-84 Plus CE
Turn off device: 2ND OFF The RPN83P app starts directly into the calculator mode, like this: Supported Hardware This app was designed for TI calculators using the Z80 processor: TI-83 Plus (6 MHz Z80, 24 kB accessible RAM, 160 kB accessible flash) TI-83 Plus Silver Edition (6/15 MH...