TilEm is an emulator for the Z80 series of Texas Instruments graphing
calculators.  It currently features:

    * All Z80 TI calculators (73, 82, 83, 83+, 83+ SE, 84+, 84+ SE, 85,
      and 86) except the TI-81, and all known ROM/OS versions
    * Automatic certificate patching for dumped 73/83+/84+ ROMs
    * Flash writing and erasing
    * Application and OS loading
    * Built-in debugger
    * Flexible keyboard handling
    * Much more!

WWW: http://lpg.ticalc.org/prj_tilem/