mamedev/mame
Mar 2026 – Jun 2026
2 Months active
Languages Used
C++
Technical Skills
C++ programmingCPU EmulationCPU architectureMemory ManagementPerformance Optimizationcache management
Jesus Ramos
PROFILE
Jesus Ramos
Worked on the mamedev/mame repository to enhance the SH7709S CPU emulation, focusing on memory timing and cache subsystem improvements for better performance and accuracy in memory-intensive scenarios. Leveraged C++ and deep knowledge of CPU architecture to refine cache behavior, implement cache invalidation and writeback support, and optimize memory access paths. Addressed timing fidelity by converting CPU cycles to bus cycles and refining SDRAM timing calculations, which improved emulation stability and speed for cv1k arcade titles. Emphasized maintainable code by restructuring timing functions and updating cache management logic, resulting in a cleaner, more accurate, and performant emulator codebase.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
6Total
Bugs
0
Commits
6
Features
2
Lines of code
1,168
Activity Months2
Your Network
119 peopleWork History
June 2026
1 Commits • 1 Features
Jun 1, 2026June 2026 monthly summary for mamedev/mame: Focus on delivering CPU emulation enhancements with measurable impact on accuracy and performance. Key feature delivered, major bug fixes, and business value.
1 Commits • 1 Features
Jun 1, 2026June 2026 monthly summary for mamedev/mame: Focus on delivering CPU emulation enhancements with measurable impact on accuracy and performance. Key feature delivered, major bug fixes, and business value.
June 2026
March 2026
5 Commits • 1 Features
Mar 1, 2026March 2026 monthly work summary for mamedev/mame. Focused on SH7709S memory timing and cache subsystem improvements to enhance emulation performance and accuracy for memory-intensive SH7709S paths, including cv1k titles. Also addressed critical DRC memory access correctness and refined cache/bank-conflict handling to reduce stalls and improve overall stability. The work delivers tangible speedups, improved timing fidelity, and a cleaner, more maintainable codebase for SH7709S memory subsystems.
March 2026
5 Commits • 1 Features
Mar 1, 2026March 2026 monthly work summary for mamedev/mame. Focused on SH7709S memory timing and cache subsystem improvements to enhance emulation performance and accuracy for memory-intensive SH7709S paths, including cv1k titles. Also addressed critical DRC memory access correctness and refined cache/bank-conflict handling to reduce stalls and improve overall stability. The work delivers tangible speedups, improved timing fidelity, and a cleaner, more maintainable codebase for SH7709S memory subsystems.
Activity
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Quality Metrics
Correctness83.4%
Maintainability80.0%
Architecture80.0%
Performance83.4%
AI Usage26.6%
Skills & Technologies
Programming Languages
C++
Technical Skills
C++C++ programmingCPU ArchitectureCPU EmulationCPU architectureEmulator DevelopmentMemory ManagementPerformance Optimizationcache managementembedded systemslow-level programmingperformance optimizationsystem programming
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