mamedev/mame
May 2025 – Jul 2026
14 Months active
Languages Used
C++XMLLua
Technical Skills
EmulationHardware DescriptionReverse EngineeringC++Game DevelopmentEmbedded Systems
stonedDiscord
PROFILE
Stoneddiscord
Over 14 months, this developer expanded hardware emulation and catalog coverage in the mamedev/mame repository, delivering 19 features and resolving 5 bugs. They implemented new device drivers, enhanced ROM management, and integrated support for diverse arcade and gambling systems using C++ and XML. Their work included memory mapping, input handling, and hardware simulation, often scaffolding non-working systems to enable future development and testing. By standardizing ROM extensions, improving metadata, and refactoring code for maintainability, they improved emulator reliability and user experience. Their disciplined approach emphasized traceability, data organization, and collaborative issue tracking, supporting long-term codebase health and extensibility.
Overall Statistics
Feature vs Bugs
79%Features
Repository Contributions
32Total
Bugs
5
Commits
32
Features
19
Lines of code
6,721
Activity Months14
Your Network
119 peopleWork History
July 2026
1 Commits • 1 Features
Jul 1, 2026July 2026: NSM/Löwen ST25 platform groundwork laid in MAME. Implemented a skeleton driver and platform registration, enabling future support for a family of gambling machine systems. Registered 24 new game systems (currently non-functional) and documented the hardware and memory mapping for the NEC V25-based architecture to accelerate future integration.
1 Commits • 1 Features
Jul 1, 2026July 2026: NSM/Löwen ST25 platform groundwork laid in MAME. Implemented a skeleton driver and platform registration, enabling future support for a family of gambling machine systems. Registered 24 new game systems (currently non-functional) and documented the hardware and memory mapping for the NEC V25-based architecture to accelerate future integration.
July 2026
June 2026
2 Commits • 2 Features
Jun 1, 2026June 2026: Focused on expanding emulation coverage for two arcade families in mamedev/mame. Key progress includes a substantial Elzet80 emulation integration with video output via MC6845 CRTC, character generator decoding, and video RAM mapping, along with configuration of serial ports, floppy disk controller components, and interrupt handling to boot and display. Initiated Capriccio Sesame crane games emulation, adding ROM definitions and hardware configuration to enable initial emulation for Capriccio Sesame and Capriccio Sesame 2; currently NOT WORKING but establishes groundwork for future functionality. No explicit bug fixes reported in this scope; the work delivers meaningful business value by broadening device fidelity, enabling preservation, testing, and future feature work while maintaining a clean, extensible codebase.
June 2026
2 Commits • 2 Features
Jun 1, 2026June 2026: Focused on expanding emulation coverage for two arcade families in mamedev/mame. Key progress includes a substantial Elzet80 emulation integration with video output via MC6845 CRTC, character generator decoding, and video RAM mapping, along with configuration of serial ports, floppy disk controller components, and interrupt handling to boot and display. Initiated Capriccio Sesame crane games emulation, adding ROM definitions and hardware configuration to enable initial emulation for Capriccio Sesame and Capriccio Sesame 2; currently NOT WORKING but establishes groundwork for future functionality. No explicit bug fixes reported in this scope; the work delivers meaningful business value by broadening device fidelity, enabling preservation, testing, and future feature work while maintaining a clean, extensible codebase.
May 2026
3 Commits • 2 Features
May 1, 2026May 2026 monthly summary for mamedev/mame. Two major deliverables focused on business value: catalog accuracy and emulator IO reliability. Implemented Game Catalog Expansion and ROM Extension Standardization with a new playable catalog entry for Kimme und Korn, documented non-working titles, and standardized ROM extension conventions to align with PCB footprint naming. Also delivered Stella 8085 Emulator I/O Mapping Improvement by implementing a proper 4040 board IO map via a standard 8255 PPI, replacing DIY IO70, updating device tags, and removing outdated code. These changes improve catalog integrity, reduce build and testing confusion, and enhance hardware emulation fidelity, setting the stage for more consistent maintenance and future expansions.
3 Commits • 2 Features
May 1, 2026May 2026 monthly summary for mamedev/mame. Two major deliverables focused on business value: catalog accuracy and emulator IO reliability. Implemented Game Catalog Expansion and ROM Extension Standardization with a new playable catalog entry for Kimme und Korn, documented non-working titles, and standardized ROM extension conventions to align with PCB footprint naming. Also delivered Stella 8085 Emulator I/O Mapping Improvement by implementing a proper 4040 board IO map via a standard 8255 PPI, replacing DIY IO70, updating device tags, and removing outdated code. These changes improve catalog integrity, reduce build and testing confusion, and enhance hardware emulation fidelity, setting the stage for more consistent maintenance and future expansions.
May 2026
April 2026
2 Commits • 2 Features
Apr 1, 2026April 2026 monthly summary for mamedev/mame: Delivered two focused enhancements and codebase improvements with measurable impact on usability and maintainability. The Stella 8085 Service Keyboard Layout and Disc Input Handling deliver improved input reliability and user interaction; and the glksstrn ROM definition was relocated to the correct file, improving code organization and future maintainability. These changes advance business value by improving user experience, reducing maintenance overhead, and enabling faster onboarding for contributors.
April 2026
2 Commits • 2 Features
Apr 1, 2026April 2026 monthly summary for mamedev/mame: Delivered two focused enhancements and codebase improvements with measurable impact on usability and maintainability. The Stella 8085 Service Keyboard Layout and Disc Input Handling deliver improved input reliability and user interaction; and the glksstrn ROM definition was relocated to the correct file, improving code organization and future maintainability. These changes advance business value by improving user experience, reducing maintenance overhead, and enabling faster onboarding for contributors.
March 2026
6 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for mamedev/mame: Delivered substantial library expansion and metadata improvements across MAME and Stella, together with targeted ROM size and DSP corrections to improve compatibility and user experience. Key work included marking new systems as not working where applicable, adding video metadata for fstation7, and shipping several new working systems to broaden the playable catalog. The work enhances content visibility, accuracy of ROM metadata, and long-term maintainability.
6 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for mamedev/mame: Delivered substantial library expansion and metadata improvements across MAME and Stella, together with targeted ROM size and DSP corrections to improve compatibility and user experience. Key work included marking new systems as not working where applicable, adding video metadata for fstation7, and shipping several new working systems to broaden the playable catalog. The work enhances content visibility, accuracy of ROM metadata, and long-term maintainability.
March 2026
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 (2026-01) — Focused on expanding the MAME emulator catalog via mamedev/mame by adding Roadrunner and Barcrest entries. These are staged as NOT WORKING to reflect ongoing work while broadening the catalog and setting up future debugging opportunities. No major bug fixes documented in this period; the work emphasizes feature expansion and foundation building for future compatibility work.
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 (2026-01) — Focused on expanding the MAME emulator catalog via mamedev/mame by adding Roadrunner and Barcrest entries. These are staged as NOT WORKING to reflect ongoing work while broadening the catalog and setting up future debugging opportunities. No major bug fixes documented in this period; the work emphasizes feature expansion and foundation building for future compatibility work.
December 2025
2 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for mamedev/mame focusing on feature delivery and groundwork for future testing. Key features delivered include reordering and clarifying MAME short names, plus scaffolding a Merkur Backgammon clone for future development. No major bug fixes were recorded in this period. These efforts improve navigation, maintainability, and testing readiness, accelerating future feature work and QA.
2 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for mamedev/mame focusing on feature delivery and groundwork for future testing. Key features delivered include reordering and clarifying MAME short names, plus scaffolding a Merkur Backgammon clone for future development. No major bug fixes were recorded in this period. These efforts improve navigation, maintainability, and testing readiness, accelerating future feature work and QA.
December 2025
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025: Focused feature delivery and codebase readiness for mamedev/mame. Implemented Polar Star 2 arcade game support, including its ROM and sound configurations, with the system explicitly marked as not working to guide QA. No major bug fixes were recorded this month; efforts concentrated on enabling future validation, maintainability, and repository health. The work strengthens platform coverage and sets up for future playable integration and testing.
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025: Focused feature delivery and codebase readiness for mamedev/mame. Implemented Polar Star 2 arcade game support, including its ROM and sound configurations, with the system explicitly marked as not working to guide QA. No major bug fixes were recorded this month; efforts concentrated on enabling future validation, maintainability, and repository health. The work strengthens platform coverage and sets up for future playable integration and testing.
October 2025
1 Commits • 1 Features
Oct 1, 20252025-10 Monthly summary for mamedev/mame: Delivered Elaut Megacrane skeleton driver for crane game control board with input handling and initial sound scaffolding; framework established for gameplay mechanics and system interactions. The feature is currently marked as not working, providing a clear path for iterative development and testing. This work aligns with issue #14441 and is anchored by commit 60c9a1e2937f93f29d87eb5d796b1ef869e6ed38.
1 Commits • 1 Features
Oct 1, 20252025-10 Monthly summary for mamedev/mame: Delivered Elaut Megacrane skeleton driver for crane game control board with input handling and initial sound scaffolding; framework established for gameplay mechanics and system interactions. The feature is currently marked as not working, providing a clear path for iterative development and testing. This work aligns with issue #14441 and is anchored by commit 60c9a1e2937f93f29d87eb5d796b1ef869e6ed38.
October 2025
September 2025
5 Commits • 2 Features
Sep 1, 2025Month: 2025-09 | Repository: mamedev/mame | Scope: Focus on emulation fidelity, hardware variant support, and codebase quality. Delivered targeted bug fixes, feature enhancements, and groundwork for future hardware integrations in the MAME repository. Summary of work: - Fixed critical V38 PAL ROM_LOAD size handling in PatGen to ensure correct data loading during emulation, improving ROM compatibility and reliability for V38 PAL variants. - Added Funny Land de Luxe NVRAM initialization with default NVRAM content and ROM definitions, including documentation updates for NVRAM handling and different board variants, improving emulation accuracy and user guidance. - Expanded Stellafr/ADP Stella support with Intel 8256 MUART emulation, new ADP Stella games, layout updates, ROM registrations, and led layout groundwork (including El Circulo groundwork). This enhances hardware-accurate input/output behavior and expands the playable game set. Business value and impact: - Increased emulation fidelity for specific boards and legacy hardware, reducing edge-case reporting and bug reports from users. - Improved out-of-the-box experience for new variants with ready-to-use NVRAM configurations and documentation. - Broader hardware coverage and better testability through MUART emulation and LED layout support, enabling further development and experimentation. Technologies/skills demonstrated: - C++ emulation code changes (PatGen, ADP components), ROM loading, NVRAM handling, MUART emulation, ROM registration, LED layout modeling, and documentation.
September 2025
5 Commits • 2 Features
Sep 1, 2025Month: 2025-09 | Repository: mamedev/mame | Scope: Focus on emulation fidelity, hardware variant support, and codebase quality. Delivered targeted bug fixes, feature enhancements, and groundwork for future hardware integrations in the MAME repository. Summary of work: - Fixed critical V38 PAL ROM_LOAD size handling in PatGen to ensure correct data loading during emulation, improving ROM compatibility and reliability for V38 PAL variants. - Added Funny Land de Luxe NVRAM initialization with default NVRAM content and ROM definitions, including documentation updates for NVRAM handling and different board variants, improving emulation accuracy and user guidance. - Expanded Stellafr/ADP Stella support with Intel 8256 MUART emulation, new ADP Stella games, layout updates, ROM registrations, and led layout groundwork (including El Circulo groundwork). This enhances hardware-accurate input/output behavior and expands the playable game set. Business value and impact: - Increased emulation fidelity for specific boards and legacy hardware, reducing edge-case reporting and bug reports from users. - Improved out-of-the-box experience for new variants with ready-to-use NVRAM configurations and documentation. - Broader hardware coverage and better testability through MUART emulation and LED layout support, enabling further development and experimentation. Technologies/skills demonstrated: - C++ emulation code changes (PatGen, ADP components), ROM loading, NVRAM handling, MUART emulation, ROM registration, LED layout modeling, and documentation.
August 2025
4 Commits • 1 Features
Aug 1, 2025Month: 2025-08. This period focused on advancing emulation fidelity and data accuracy in mamedev/mame. Key outcomes include adding Philips PM 5644 color pattern generator support, improving sound emulation flag semantics for TI calculators and Videoton TVC 64, and standardizing hardware manufacturer naming in Jensen system definitions. These changes enhance device coverage, reduce data errors, and strengthen overall reliability for developers and users.
4 Commits • 1 Features
Aug 1, 2025Month: 2025-08. This period focused on advancing emulation fidelity and data accuracy in mamedev/mame. Key outcomes include adding Philips PM 5644 color pattern generator support, improving sound emulation flag semantics for TI calculators and Videoton TVC 64, and standardizing hardware manufacturer naming in Jensen system definitions. These changes enhance device coverage, reduce data errors, and strengthen overall reliability for developers and users.
August 2025
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025: Expanded mamedev/mame hardware coverage by delivering the ADP Servicetastatur module integration. This included a new C++ source defining hardware components, memory maps, and I/O port handling; input ports for keypad and joystick; and integration of an LCD display with I2C EEPROM support. No major bugs fixed this month. Impact: provides accurate emulation for the ADP Servicetastatur, enabling richer testing scenarios and broader compatibility, and sets groundwork for future ADP hardware integrations. Technologies demonstrated: C++ module development, hardware emulation concepts (memory maps, I/O ports), peripheral emulation (LCD, I2C EEPROM), and disciplined version control. Commit reference: fc02958d4f3768078c8c7ae7c23799fb88b7b2aa (ADP: Support Servicetastatur module (#13768)).
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025: Expanded mamedev/mame hardware coverage by delivering the ADP Servicetastatur module integration. This included a new C++ source defining hardware components, memory maps, and I/O port handling; input ports for keypad and joystick; and integration of an LCD display with I2C EEPROM support. No major bugs fixed this month. Impact: provides accurate emulation for the ADP Servicetastatur, enabling richer testing scenarios and broader compatibility, and sets groundwork for future ADP hardware integrations. Technologies demonstrated: C++ module development, hardware emulation concepts (memory maps, I/O ports), peripheral emulation (LCD, I2C EEPROM), and disciplined version control. Commit reference: fc02958d4f3768078c8c7ae7c23799fb88b7b2aa (ADP: Support Servicetastatur module (#13768)).
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 - mamedev/mame: Delivered targeted updates to ROM definitions and game relationships to improve accuracy, clone support, and maintenance of the catalog. Implemented configuration-driven ROM entries, marked non-working clones, and fixed parent handling to ensure correct emulation and categorization for no-parent games. All changes are traceable to commits and align with business value of improved user experience and reliability.
2 Commits • 1 Features
Jun 1, 2025June 2025 - mamedev/mame: Delivered targeted updates to ROM definitions and game relationships to improve accuracy, clone support, and maintenance of the catalog. Implemented configuration-driven ROM entries, marked non-working clones, and fixed parent handling to ensure correct emulation and categorization for no-parent games. All changes are traceable to commits and align with business value of improved user experience and reliability.
June 2025
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for mamedev/mame. Key feature delivery: Added fruit machine hardware variant support to the Stella 8085 emulator by introducing new machine configurations and ROM/memory maps, expanding compatibility to cover additional fruit machine hardware variants. Maintenance/quality: Included NOT_WORKING markers for the new machines to improve status accuracy and reduce misleading bug reports (referencing issue #13529). No major bug fixes reported this period; emphasis was on feature delivery and maintainability. Business impact: broader emulator coverage increases potential user base and compatibility, while explicit status tagging enhances reliability and reduces support overhead. Technologies/skills demonstrated: emulator driver development, ROM/memory map configuration, version control discipline, and issue tracking and cross-repo collaboration.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for mamedev/mame. Key feature delivery: Added fruit machine hardware variant support to the Stella 8085 emulator by introducing new machine configurations and ROM/memory maps, expanding compatibility to cover additional fruit machine hardware variants. Maintenance/quality: Included NOT_WORKING markers for the new machines to improve status accuracy and reduce misleading bug reports (referencing issue #13529). No major bug fixes reported this period; emphasis was on feature delivery and maintainability. Business impact: broader emulator coverage increases potential user base and compatibility, while explicit status tagging enhances reliability and reduces support overhead. Technologies/skills demonstrated: emulator driver development, ROM/memory map configuration, version control discipline, and issue tracking and cross-repo collaboration.
Activity
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Quality Metrics
Correctness80.4%
Maintainability84.4%
Architecture83.8%
Performance78.8%
AI Usage24.4%
Skills & Technologies
Programming Languages
C++LuaXML
Technical Skills
C++C++ DevelopmentC++ programmingCode RefactoringDevice DriversEmbedded SystemsEmulationEmulation DevelopmentEmulator DevelopmentGame DevelopmentHardware ArchitectureHardware DescriptionHardware EmulationHardware Reverse EngineeringHardware Simulation
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