CEmu

CEmu is an open‑source emulator that replicates the behavior of the eZ80‑based TI‑84 Plus CE and TI‑83 Premium CE graphing calculators. It runs natively on Windows, macOS, and Linux, using a C core for the emulation engine and a C++/Qt graphical interface for performance and portability. Users can connect a real calculator once to import data, then operate a resizable on‑screen calculator with features such as screen capture, drag‑and‑drop of PNG images, and optional always‑on‑top windows.

The emulator offers customizable speed throttling, multiple key‑binding presets, full‑screen modes, and the ability to save and restore emulation states. Color skins mimic the physical devices, and the interface is available in several languages, including English, French, Spanish, Dutch, and Chinese.

For developers, CEmu provides extensive debugging tools: command‑line options, inter‑process communication for running several instances, and detailed introspection of CPU registers, memory, LCD parameters, and peripherals. It supports code stepping, breakpoints, an eZ80 disassembler, and viewers for RAM, ROM, and variables, as well as automated testing scripts and profiling counters.