Practical example of reverse engineering an old circuit board without specifications using RL78 disassembly.
This article explains the disassembly procedure for the Renesas RL78 microcontroller based on actual devices. It is a practical case study of restoring a 15-year-old industrial device, which has no specifications or source code, from an ELF file to C language. It includes register analysis and the porting to the latest microcontrollers. For more details, please refer to the technical column in the related links.
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basic information
【Technical Elements】 - Renesas RL78 Microcontroller - Disassembly (elf → C language restoration) - Register analysis - Porting to the latest microcontrollers 【Category】Embedded, Maintenance, Migration *For details, please refer to the technical column in the related links.
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Applications/Examples of results
【Intended Use】 - Analysis and restoration of old equipment without specifications - Maintenance and migration of EOL microcontroller-equipped products - Redundancy for legacy industrial equipment 【Examples of Achievements】 - Restored industrial equipment from 15 years ago from ELF to C language
Company information
Technosphere Co., Ltd. is a system development company based in Osaka that tackles customer challenges in advanced technology areas such as AI, IoT, and web system development. Since its founding in 2021, the company has leveraged a flat team structure to achieve a flexible and speedy development style. We are engaged in solutions that directly address social issues, such as image inspection AI and smart factory support systems.
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