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While IANAL, TI has not objected to emulators in the past; there are third-party freeware emulators available for all of their calculators (including the older

While IANAL, TI has not objected to emulators in the past; there are third-party freeware emulators available for all of their calculators (including the older 83/84 series, the 68K calculators, and the Nspire). TI's legal department has tended to draw the line at two points: they don't like illegal copying of their ROMs (so, while they haven't objected to tools which pull a ROM off a real calculator you have in your physical possession, they will send takedown notices if you post those results publicly), and they've become pretty aggressive in working against anything that compromises the integrity of the OS on a physical calculator (because they don't want push-to-test features compromised). Just about anything else goes (and is occasionally encouraged).

ocdtrekkie 11y ago
Yup, TI's dealt with Android apps which emulate their calculators before, the rule of thumb is: You cannot provide the OS ROM, but you can offer the emulator if it requires their OS ROM to run. Theoretically, yes, so people have to get it from their own calculator. The open secret though, is that TI offers the ROMs for their OS on their website for free download...
- jacquesm 11y ago
  That's well within their rights so I really don't see the problem. Copyright basically means you get to have a say in who offers the stuff you built and TI requiring people to go through them for their ROMs makes perfect sense.
JadeNB 11y ago
Thank you very much! I had a vague impression that TI was reasonably friendly about this, but couldn't remember or find any substantiation. Your post is very informative.