casio fx-82ms calculator to higher versions

how to upgrade ur casio fx-82ms calculator to higher versions??

   just follow these instructions

1.mode

2.press 2 (select SD)

3.press up arrow key(it will show n=)

4.press 9

5.press m+ key until it shows "data full"

6.press =

7.press 2 [ esc ]

8.press up arrow,,then it will show freq80=

9.type 131313....until it show a blinking black square

10.press=

11.again press =

12.press0

13press 1

14.press=

then it show some errors like syntax or stack error

15.press ac

now ur calculator is upgraded to fx570

note:do not press on button 

        make sure ur calculator rating is 0.0002w

u can make ur calculator to 991ms by select 'reg' in step 2