During December 2025, the developer enhanced the mamedev/mame repository by building a Sega Channel Emulator for the US version, focusing on emulation fidelity and testability. Using C++ and leveraging skills in hardware interfacing and game development, they implemented a Sega Channel adapter with simulated transmission, addressed tuning errors, and introduced parental controls for realistic access management. Their work added structured handling for channel IDs and authorization, improved menu systems, and expanded file format support, including IMG files and CRC handling. These enhancements established a robust foundation for future updates and QA-driven testing, deepening the emulator’s realism and supporting streamlined user workflows.