http://www.omnimaga.org/index.php?topic=15796.0
TI added another clause to its EULA:
Quote (TI)
You may not use the Licensed Materials on any emulator of a TI calculator unless the emulator is obtained from TI.
We can technically have TI calc emulators, but we can't run TI's OSes on them. In my opinion, what TI said will make native-code programming a nightmare. Fortunately, it isn't exactly enforceable.