texas instruments
EFF challenges Texas Instruments over calculator mods
Texas Instruments has been making programmable calculators for longer than most companies have been making computers, and the company’s current line of calculators uses a chip—the Zilog Z80—that once appeared in personal computers. So it’s not surprising that a modding community has taken up the task of replacing the OS that runs the calculators. TI isn’t pleased by the modders’ efforts, though, and the company recently sent DMCA takedown notices to a group of bloggers who linked to information about the encryption keys needed to validate a new OS.
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