mamedev/mame
Dec 2024 – Jun 2026
6 Months active
Languages Used
C++
Technical Skills
EmulationGraphics renderingLow-level programmingHardware ConfigurationDebuggingLow-level Programming
tim lindner
PROFILE
Tim Lindner
Over six months, contributed to the mamedev/mame repository by developing and refining low-level emulation features and addressing critical bugs in C++. Focused on improving hardware fidelity and stability, work included implementing vertical text scrolling for the GIME device and envelope-based sound activity detection using digital signal processing techniques. Debugging efforts targeted memory dump accuracy and input handling, such as correcting keyboard interrupt processing and memory region reporting. Hardware initialization sequencing and CPU emulation were enhanced through precise cycle counting and flag management. Emphasis on traceable, maintainable commits and targeted code isolation ensured robust, reliable improvements to graphics, input, and sound subsystems.
Overall Statistics
Feature vs Bugs
29%Features
Repository Contributions
7Total
Bugs
5
Commits
7
Features
2
Lines of code
696
Activity Months6
Your Network
119 peopleWork History
June 2026
2 Commits • 1 Features
Jun 1, 2026June 2026: Emulation fidelity and reliability improvements for mamedev/mame focused on CoCo SSC sound detection and 6309 CPU behavior. Delivered envelope-based sound activity detection with save-state integration and corrected HD6309 DIVD/DIVQ timing and flag handling, validated against hardware metrics.
2 Commits • 1 Features
Jun 1, 2026June 2026: Emulation fidelity and reliability improvements for mamedev/mame focused on CoCo SSC sound detection and 6309 CPU behavior. Delivered envelope-based sound activity detection with save-state integration and corrected HD6309 DIVD/DIVQ timing and flag handling, validated against hardware metrics.
June 2026
May 2026
1 Commits
May 1, 2026May 2026 monthly summary for mamedev/mame focusing on CoCo 3 input handling bug fix and related stability improvements. This month’s work concentrated on remediating keyboard interrupt issues and preserving input state to improve emulator reliability.
May 2026
1 Commits
May 1, 2026May 2026 monthly summary for mamedev/mame focusing on CoCo 3 input handling bug fix and related stability improvements. This month’s work concentrated on remediating keyboard interrupt issues and preserving input state to improve emulator reliability.
November 2025
1 Commits • 1 Features
Nov 1, 2025Month 2025-11 summary focused on delivering a targeted emulation feature and maintaining code quality.
1 Commits • 1 Features
Nov 1, 2025Month 2025-11 summary focused on delivering a targeted emulation feature and maintaining code quality.
November 2025
October 2025
1 Commits
Oct 1, 2025October 2025: Delivered a targeted debugger improvement for MAME, focusing on the memory dump reporting path. Addressed issues with overlapping memory views and duplicate entries in the memdump command, introducing a helper to detect existing handlers and refining iteration logic to ensure accurate, deduplicated memory region reporting. This fix stabilizes memory dumps, reduces debugging noise, and enhances reliability of memory-related tooling across the project.
October 2025
1 Commits
Oct 1, 2025October 2025: Delivered a targeted debugger improvement for MAME, focusing on the memory dump reporting path. Addressed issues with overlapping memory views and duplicate entries in the memdump command, introducing a helper to detect existing handlers and refining iteration logic to ensure accurate, deduplicated memory region reporting. This fix stabilizes memory dumps, reduces debugging noise, and enhances reliability of memory-related tooling across the project.
June 2025
1 Commits
Jun 1, 2025June 2025: Deliveries focused on stabilizing hardware initialization sequencing in the MAME project. Implemented a critical GIME video hardware initialization order fix to improve startup reliability for affected configurations and prevent dependent component initialization issues.
1 Commits
Jun 1, 2025June 2025: Deliveries focused on stabilizing hardware initialization sequencing in the MAME project. Implemented a critical GIME video hardware initialization order fix to improve startup reliability for affected configurations and prevent dependent component initialization issues.
June 2025
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for mamedev/mame: Focused maintenance and fidelity improvement in the emulator's rendering pipeline. Delivered a targeted bug fix for GIME Legacy Video Mode Rendering, addressing incorrect lines-per-row calculations and border color adjustments for legacy graphics/text modes to improve rendering accuracy and user experience.
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for mamedev/mame: Focused maintenance and fidelity improvement in the emulator's rendering pipeline. Delivered a targeted bug fix for GIME Legacy Video Mode Rendering, addressing incorrect lines-per-row calculations and border color adjustments for legacy graphics/text modes to improve rendering accuracy and user experience.
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Quality Metrics
Correctness87.2%
Maintainability82.8%
Architecture82.8%
Performance77.2%
AI Usage34.2%
Skills & Technologies
Programming Languages
C++
Technical Skills
C++CPU EmulationDebuggingDigital Signal ProcessingEmbedded SystemsEmulationGraphics renderingHardware ConfigurationLow-level ProgrammingLow-level programmingMemory Managementdevice driver developmentgraphics programminghardware interfacinginput handling
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