Reverse-Engineering the TI-84 Plus OS: System Architecture and Disassembly Notes
Reverse-engineering notes for the TI-84 Plus calculator OS (version 2.55MP), a Z80-based system. The article documents the system architecture, including the Zilog Z80 CPU with 16-bit address bus and 64 KiB logical space, hardware flash/RAM paging, and a Ghidra project setup for disassembly and decompilation analysis of the 1 MiB ROM dump.
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