i want to modify my casio 991ms scientific calculator so that it can store text files .. plzz any one can help me??

i  want to modify my casio 991ms scientific calculator so that it can store tex files ..i think a external memory card and prorgramming will do tthis plzz any one can help me??

frollard6 years ago
What data do you want to store in the text file? I'm guessing something that won't be cleared when you delete the program memory?