Unprotecting a TI-83 program?

January 27, 2006 9:39 PM

TI-83 Question. I have a protected program on my calculator and would like to modify it.

Years and years ago it was really simple to unprotect a file using TI's Graph-Link software but they don't seem to offer or support it anymore; it was dropped in favor of this new TI Connect program. For the life of me I can't figure out how to find the program editing interface in TI Connect, or even some kind of file manager that might allow me to unprotect a file (or protect one, for that matter).

I have MirageOS on the calc and I know it has the ability to unprotect files, but the protected program is not recognized by Mirage because it's missing the additional ":" on the first line.

The program in question was written in Basic, so I know it is safe to muck with on the calc. I just need help accessing its innards.

Thanks :)

posted by Ziggy Zaga to Computers & Internet (3 answers total)

Have you tried finding a copy of the old software and using that? It looks like they still sell the Graph-link software and link cable, but only TI Connect is available for download.

There are a number of other programs for linking TIs to be found here.

I don't know how the protection on TIs works, but can't you just copy the file over to your PC and read it on there?
posted by atrazine at 10:40 PM on January 27, 2006

Have you tried searching for some other programs that might unprotect the program in question? Try here. I'm assuming you already have a TI-link cable?

Programs 'prog' or 'protect' seem like they'll work...
posted by provolot at 3:38 AM on January 28, 2006

there is an enable "bit". You can use a calculator hex editor to change the bit from 0x05 to 0x06.. or the other way around.. I haven't touched a calculator for about 6 years so I don't remember the details
posted by lpctstr; at 8:52 PM on January 28, 2006