mamedev/mame
Jan 2025 – Apr 2026
10 Months active
Languages Used
C++LuaXML
Technical Skills
Audio SynthesisC++ DevelopmentEmbedded SystemsEmulationEmulation DevelopmentHardware Simulation
Devin Acker
PROFILE
Devin Acker
Over ten months, D. contributed to the mamedev/mame repository by developing and refining hardware emulation features for legacy audio devices, musical instruments, and peripherals. Using C++, Lua, and XML, D. implemented support for Casio keyboards, digital guitars, and floppy disk operations, while also enhancing printer and MIDI device emulation. Their work involved low-level programming, device driver development, and system integration, addressing both feature delivery and critical bug fixes. By standardizing input layouts and improving audio fidelity, D. enabled more accurate emulation and easier maintenance. The depth of their contributions advanced hardware coverage and reliability for both users and developers.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
23Total
Bugs
4
Commits
23
Features
16
Lines of code
10,961
Activity Months10
Your Network
106 peopleWork History
April 2026
3 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for mamedev/mame focused on hardware emulation accuracy and stability improvements. Delivered key features for legacy printer interfaces and fixed critical I/O behavior to improve reliability of emulation.
3 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for mamedev/mame focused on hardware emulation accuracy and stability improvements. Delivered key features for legacy printer interfaces and fixed critical I/O behavior to improve reliability of emulation.
April 2026
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for mamedev/mame. Focused on feature delivery for peripheral emulation. Delivered NEC PC-6022 Color Plotter Printer support, expanding hardware coverage and testability for print workflows. No major bugs fixed were documented this month. The work enhances the emulator’s value to developers and researchers by enabling accurate plotting device emulation and validating printer-related software pipelines.
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for mamedev/mame. Focused on feature delivery for peripheral emulation. Delivered NEC PC-6022 Color Plotter Printer support, expanding hardware coverage and testability for print workflows. No major bugs fixed were documented this month. The work enhances the emulator’s value to developers and researchers by enabling accurate plotting device emulation and validating printer-related software pipelines.
January 2026
5 Commits • 5 Features
Jan 1, 2026January 2026: Delivered key hardware emulation features and core improvements across MAME (mamedev/mame), expanding device coverage, improving emulator accuracy, and enhancing developer tooling. Focused on Casio DG-10/DG-20 guitar support, uPD7801 core enhancements, ld50 MIDI/battery integration, Xetec C-5181 printer interface, and promoting Pirates of Dark Water to a working state. Implemented foundational ROM and debugger improvements to increase reliability and debugging efficiency.
5 Commits • 5 Features
Jan 1, 2026January 2026: Delivered key hardware emulation features and core improvements across MAME (mamedev/mame), expanding device coverage, improving emulator accuracy, and enhancing developer tooling. Focused on Casio DG-10/DG-20 guitar support, uPD7801 core enhancements, ld50 MIDI/battery integration, Xetec C-5181 printer interface, and promoting Pirates of Dark Water to a working state. Implemented foundational ROM and debugger improvements to increase reliability and debugging efficiency.
January 2026
September 2025
3 Commits • 1 Features
Sep 1, 2025In September 2025, delivered a focused feature to standardize and improve keyboard layout handling for Casio and Yamaha models in the MAME emulator, enhancing hit-testing accuracy and correct signal mapping. The work lays groundwork for scalable, model-specific input layouts and improves emulation fidelity for commonly used keyboard models.
September 2025
3 Commits • 1 Features
Sep 1, 2025In September 2025, delivered a focused feature to standardize and improve keyboard layout handling for Casio and Yamaha models in the MAME emulator, enhancing hit-testing accuracy and correct signal mapping. The work lays groundwork for scalable, model-specific input layouts and improves emulation fidelity for commonly used keyboard models.
July 2025
2 Commits • 1 Features
Jul 1, 2025Monthly performance summary for 2025-07 focused on delivering audio fidelity improvements and foundational emulation features for mamedev/mame. The month delivered stable CZ1 audio routing improvements and groundwork for Casio FZ-series sound emulation, enabling more accurate hardware emulation and smoother user experiences.
2 Commits • 1 Features
Jul 1, 2025Monthly performance summary for 2025-07 focused on delivering audio fidelity improvements and foundational emulation features for mamedev/mame. The month delivered stable CZ1 audio routing improvements and groundwork for Casio FZ-series sound emulation, enabling more accurate hardware emulation and smoother user experiences.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary focusing on key accomplishments in mamedev/mame. Implemented floppy disk support for Casio FZ-1 and clones, introducing a new FZ1_DSK image format and integrating a Panasonic JU-386 floppy drive into the FZ-1 machine configuration to enable floppy disk operations and improve emulation fidelity.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary focusing on key accomplishments in mamedev/mame. Implemented floppy disk support for Casio FZ-1 and clones, introducing a new FZ1_DSK image format and integrating a Panasonic JU-386 floppy drive into the FZ-1 machine configuration to enable floppy disk operations and improve emulation fidelity.
April 2025
3 Commits • 3 Features
Apr 1, 2025April 2025 — mamedev/mame: Delivered baseline emulation scaffolding across three families to expand hardware coverage and enable future functionality. Skeleton Oldsmobile Driver Information System (version 2.2 CH) introduced with hardware configuration, IO ports, and memory maps to emulate core behavior; CPS-2000 emulation improvements include a skeleton driver plus enhanced μPD934 and MSM6200 emulation with timer-based MSM6200 scanning and a fix for the μPD934g play-sample command; preliminary drivers for Casio FZ-series samplers (FZ-1, FZ-10M, FZ-20M) with an internal V50 CPU serial interrupt and support for alternate HD44352 screen dimensions. All work is marked NOT_WORKING to reflect early-stage status but lays the groundwork for deeper emulation and testing. Commits align with #13525, #13591, #13623.
3 Commits • 3 Features
Apr 1, 2025April 2025 — mamedev/mame: Delivered baseline emulation scaffolding across three families to expand hardware coverage and enable future functionality. Skeleton Oldsmobile Driver Information System (version 2.2 CH) introduced with hardware configuration, IO ports, and memory maps to emulate core behavior; CPS-2000 emulation improvements include a skeleton driver plus enhanced μPD934 and MSM6200 emulation with timer-based MSM6200 scanning and a fix for the μPD934g play-sample command; preliminary drivers for Casio FZ-series samplers (FZ-1, FZ-10M, FZ-20M) with an internal V50 CPU serial interrupt and support for alternate HD44352 screen dimensions. All work is marked NOT_WORKING to reflect early-stage status but lays the groundwork for deeper emulation and testing. Commits align with #13525, #13591, #13623.
April 2025
March 2025
1 Commits
Mar 1, 2025March 2025 monthly summary for mamedev/mame focused on stabilizing the audio emulation path. Delivered a critical bug fix addressing a sound filter overflow in GT155 by widening the data-type range for the filter output in gt155.cpp and gt155.h, preventing data loss and improving reliability of audio processing in the emulated hardware. The change aligns with ongoing goals of improving fidelity and stability of audio emulation across GT155-based titles.
March 2025
1 Commits
Mar 1, 2025March 2025 monthly summary for mamedev/mame focused on stabilizing the audio emulation path. Delivered a critical bug fix addressing a sound filter overflow in GT155 by widening the data-type range for the filter output in gt155.cpp and gt155.h, preventing data loss and improving reliability of audio processing in the emulated hardware. The change aligns with ongoing goals of improving fidelity and stability of audio emulation across GT155-based titles.
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for mamedev/mame focused on delivering key emulation features, stabilizing memory mappings, and expanding device coverage to support legacy hardware. The work drove improved fidelity, broader platform coverage, and reduced maintenance overhead for emulation paths.
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for mamedev/mame focused on delivering key emulation features, stabilizing memory mappings, and expanding device coverage to support legacy hardware. The work drove improved fidelity, broader platform coverage, and reduced maintenance overhead for emulation paths.
February 2025
January 2025
2 Commits • 2 Features
Jan 1, 2025January 2025 — mamedev/mame: Focused on expanding hardware support with two major feature sets and groundwork for ongoing emulation development. Key features delivered include AtGames Atari Flashback Portable (v4) system support and Casio Casiotone 8000 emulation. No explicit bug fixes documented in this dataset. Overall impact includes broader hardware coverage, improved entry points for future emulation fidelity, and demonstrable cross-domain integration (system configuration, audio synthesis, and MIDI).
January 2025
2 Commits • 2 Features
Jan 1, 2025January 2025 — mamedev/mame: Focused on expanding hardware support with two major feature sets and groundwork for ongoing emulation development. Key features delivered include AtGames Atari Flashback Portable (v4) system support and Casio Casiotone 8000 emulation. No explicit bug fixes documented in this dataset. Overall impact includes broader hardware coverage, improved entry points for future emulation fidelity, and demonstrable cross-domain integration (system configuration, audio synthesis, and MIDI).
Activity
Loading activity data...
Quality Metrics
Correctness85.6%
Maintainability83.0%
Architecture82.6%
Performance74.8%
AI Usage20.8%
Skills & Technologies
Programming Languages
C++LuaXML
Technical Skills
Audio ProcessingAudio ProgrammingAudio SynthesisC++C++ DevelopmentC++ programmingCPU ArchitectureCPU emulationConfiguration ManagementDevice DriversDriver DevelopmentEmbedded SystemsEmulationEmulation DevelopmentEmulator Development
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline