Full Reverse Engineering of the TI-84 Plus Operating System

Researchers have completed a full reverse engineering of the TI-84 Plus calculator's operating system (version 2.55MP), documenting its Z80 processor architecture, memory paging system, and core subsystems including the floating-point engine, variable system, and tokenizer. The project provides comprehensive technical documentation covering everything from the calculator's 64 KiB logical address space and Flash memory management to its I/O subsystems, interrupt handling, and TI-BASIC interpreter, with analysis status indicators for each component.