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Welcome to ti 84 plus Questions and Answer. Feel free to ask any question related to ti 84 plus (or others texas instrument calculators or even HP or Casio calculators). You could also ask for help if you have sciences questions (math, physics ...) We provide help for ti-84-plus usage, programming, hardware, math...

Can't edit a program ?!

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I can't edit a program when I select it into the program menu, and switch to the tab edit, it simply disappears !

asked Apr 4, 2013 by anonymous

1 Answer

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That's because the program is protected.

I could be an assembly program (in this case you don't really want to modify the source code isn't it?

Or a basic protected program. A byte at the place 60 in the program is set to $05 or $06. To unprotect a program, open it with hexedit (or another hexadecimal editor) change this value, update the checksum and reload the file !

There's also some programs which could do that directly on calc.
answered Apr 4, 2013 by anonymous

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