mamedev/mame
Nov 2024 – Apr 2026
16 Months active
Languages Used
C++LuaShellluamakefilecAssemblyC
Technical Skills
Build SystemsC++C++ DevelopmentCMakeCode ClarityCompiler Toolchains
Patrick Mackinlay
PROFILE
Patrick Mackinlay
Paul Mackinlay contributed to the mamedev/mame repository by developing and refining hardware emulation features, device drivers, and build system infrastructure over a 16-month period. He engineered support for legacy systems such as VME, Multibus, and SGI workstations, implementing device emulation and debugging enhancements using C++ and Lua scripting. His work included modernizing build pipelines with CMake and Visual Studio integration, improving cross-platform reliability, and addressing low-level issues in CPU and DMA emulation. By focusing on code clarity, error handling, and maintainability, Paul delivered robust solutions that expanded hardware coverage and improved the accuracy and stability of the emulator.
Overall Statistics
Feature vs Bugs
68%Features
Repository Contributions
107Total
Bugs
24
Commits
107
Features
52
Lines of code
178,301
Activity Months16
Your Network
106 peopleWork History
April 2026
11 Commits • 4 Features
Apr 1, 2026April 2026 (Month: 2026-04) focused on delivering critical hardware emulation improvements, stabilizing I/O paths, and modernizing the build and audio pipeline to improve reliability, performance, and developer velocity. The work enhances memory protection for SGI IP2, strengthens SCSI reliability, lays groundwork for Type 2 keyboard support, and modernizes the build toolchain to enable faster, cross-platform releases while improving audio processing stability.
11 Commits • 4 Features
Apr 1, 2026April 2026 (Month: 2026-04) focused on delivering critical hardware emulation improvements, stabilizing I/O paths, and modernizing the build and audio pipeline to improve reliability, performance, and developer velocity. The work enhances memory protection for SGI IP2, strengthens SCSI reliability, lays groundwork for Type 2 keyboard support, and modernizes the build toolchain to enable faster, cross-platform releases while improving audio processing stability.
April 2026
March 2026
1 Commits
Mar 1, 2026March 2026 monthly summary for mamedev/mame focused on stabilizing M68000 bus error handling in CPU emulation. The primary improvement addresses fault isolation during instruction execution, preventing cascading faults and improving fault handling reliability in the M68000 path.
March 2026
1 Commits
Mar 1, 2026March 2026 monthly summary for mamedev/mame focused on stabilizing M68000 bus error handling in CPU emulation. The primary improvement addresses fault isolation during instruction execution, preventing cascading faults and improving fault handling reliability in the M68000 path.
February 2026
5 Commits • 4 Features
Feb 1, 2026February 2026 monthly summary for mamedev/mame highlighting key feature deliveries, major bug fix, and overall impact. Focused on improving emulation correctness, expanding hardware device coverage, and stabilizing the build pipeline to enable faster iteration and testing of SGI-era systems.
5 Commits • 4 Features
Feb 1, 2026February 2026 monthly summary for mamedev/mame highlighting key feature deliveries, major bug fix, and overall impact. Focused on improving emulation correctness, expanding hardware device coverage, and stabilizing the build pipeline to enable faster iteration and testing of SGI-era systems.
February 2026
January 2026
11 Commits • 5 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for mamedev/mame focusing on feature delivery, bug fixes, and impact. This period delivered expanded hardware emulation and improved stability, with notable gains in disk, tape, network, and graphical support, alongside targeted reliability improvements.
January 2026
11 Commits • 5 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for mamedev/mame focusing on feature delivery, bug fixes, and impact. This period delivered expanded hardware emulation and improved stability, with notable gains in disk, tape, network, and graphical support, alongside targeted reliability improvements.
December 2025
3 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for mamedev/mame focusing on hardware compatibility improvements and build reliability. Delivered substantial SGI/SUN1 support and a critical naming fix, enhancing emulation coverage and reducing device-identification issues across builds.
3 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for mamedev/mame focusing on hardware compatibility improvements and build reliability. Delivered substantial SGI/SUN1 support and a critical naming fix, enhancing emulation coverage and reducing device-identification issues across builds.
December 2025
October 2025
1 Commits • 1 Features
Oct 1, 2025Month: 2025-10 — Focused on modernizing the AsmJit integration in mamedev/mame and laying groundwork for future features. Key work centered on upgrading the AsmJit library to v1.20 with internal refactorings and API changes (snake_case renames, improved error handling) to modernize the codebase and enhance compiler/assembler functionality. This also included syncing the 3rdparty/asmjit component with upstream v1.20 (commit b1945cf415d1fb5ee1312f33dd19b599e964f8db).
October 2025
1 Commits • 1 Features
Oct 1, 2025Month: 2025-10 — Focused on modernizing the AsmJit integration in mamedev/mame and laying groundwork for future features. Key work centered on upgrading the AsmJit library to v1.20 with internal refactorings and API changes (snake_case renames, improved error handling) to modernize the codebase and enhance compiler/assembler functionality. This also included syncing the 3rdparty/asmjit component with upstream v1.20 (commit b1945cf415d1fb5ee1312f33dd19b599e964f8db).
September 2025
9 Commits • 6 Features
Sep 1, 2025September 2025 monthly summary for mamedev/mame: Expanded hardware emulation footprint and improved observability, delivering realistic IBM/PC peripherals and stronger code health. Key features added include HLE for IBM RT PC Mouse, MB8795 loopback and FCS enhancements, UBPNIC ISA NIC support, IBM 5080 Peripheral Adapter, and IBM PC AT 512Kb Memory Expansion. Network diagnostics were enhanced with formalized packet logging and logging helpers, boosting debugging efficiency. Significant code quality improvements across the emulation core — MB8795 memory map corrections, ATTR_COLD usage, and removal of outdated interrupt-control code — reduce risk of regressions and improve maintainability. Business value includes higher realism, faster debugging, and more reliable future development.
9 Commits • 6 Features
Sep 1, 2025September 2025 monthly summary for mamedev/mame: Expanded hardware emulation footprint and improved observability, delivering realistic IBM/PC peripherals and stronger code health. Key features added include HLE for IBM RT PC Mouse, MB8795 loopback and FCS enhancements, UBPNIC ISA NIC support, IBM 5080 Peripheral Adapter, and IBM PC AT 512Kb Memory Expansion. Network diagnostics were enhanced with formalized packet logging and logging helpers, boosting debugging efficiency. Significant code quality improvements across the emulation core — MB8795 memory map corrections, ATTR_COLD usage, and removal of outdated interrupt-control code — reduce risk of regressions and improve maintainability. Business value includes higher realism, faster debugging, and more reliable future development.
September 2025
August 2025
9 Commits • 4 Features
Aug 1, 2025In August 2025, the mamedev/mame project delivered a focused set of emulation enhancements and stability improvements across IBM RT PC, MDA/Hercules, and MC68681 components, complemented by refactors to improve maintainability and debug capability. The work emphasizes authenticity of retro hardware emulation, improved debugging, and a more maintainable codebase, driving business value through more reliable simulations and a smoother developer workflow.
August 2025
9 Commits • 4 Features
Aug 1, 2025In August 2025, the mamedev/mame project delivered a focused set of emulation enhancements and stability improvements across IBM RT PC, MDA/Hercules, and MC68681 components, complemented by refactors to improve maintainability and debug capability. The work emphasizes authenticity of retro hardware emulation, improved debugging, and a more maintainable codebase, driving business value through more reliable simulations and a smoother developer workflow.
June 2025
2 Commits • 2 Features
Jun 1, 2025June 2025 – Key focus on clarifying device capabilities and improving hardware integration in mamedev/mame. Delivered two features that improve correctness, maintainability, and traceability across platforms: (1) SGI_GR1 Save State Emulation Capability Indicator to explicitly mark unsupported save emulation for SGI_GR1, reducing ambiguity in device capabilities; (2) RT PC Keyboard Subsystem Refactor and MCU Integration to rename and reorganize keyboard connector and keyboard device classes for clarity, and to refine how keyboard signals are handled and integrated with the system MCU. These changes establish clearer module boundaries, support smoother future work on device emulation features, and reduce debugging friction.
2 Commits • 2 Features
Jun 1, 2025June 2025 – Key focus on clarifying device capabilities and improving hardware integration in mamedev/mame. Delivered two features that improve correctness, maintainability, and traceability across platforms: (1) SGI_GR1 Save State Emulation Capability Indicator to explicitly mark unsupported save emulation for SGI_GR1, reducing ambiguity in device capabilities; (2) RT PC Keyboard Subsystem Refactor and MCU Integration to rename and reorganize keyboard connector and keyboard device classes for clarity, and to refine how keyboard signals are handled and integrated with the system MCU. These changes establish clearer module boundaries, support smoother future work on device emulation features, and reduce debugging friction.
June 2025
May 2025
7 Commits • 3 Features
May 1, 2025May 2025 monthly summary for mamedev/mame focusing on delivering cross-compiler/build-system robustness, expanding hardware emulation, and resolving stability-critical bugs. Highlights include compiler compatibility improvements for clang-cl/MSVC, addition of Tekmis TSVME104 VME card emulation, and Luna_68k system expansion. Critical bug fixes address an overflow risk in cylinder rotation time calculation, and correct command-mask handling in NCR5385. These efforts improve build reliability, hardware compatibility, and overall emulation coverage, delivering tangible business value and long-term maintainability.
May 2025
7 Commits • 3 Features
May 1, 2025May 2025 monthly summary for mamedev/mame focusing on delivering cross-compiler/build-system robustness, expanding hardware emulation, and resolving stability-critical bugs. Highlights include compiler compatibility improvements for clang-cl/MSVC, addition of Tekmis TSVME104 VME card emulation, and Luna_68k system expansion. Critical bug fixes address an overflow risk in cylinder rotation time calculation, and correct command-mask handling in NCR5385. These efforts improve build reliability, hardware compatibility, and overall emulation coverage, delivering tangible business value and long-term maintainability.
April 2025
6 Commits • 2 Features
Apr 1, 2025April 2025 for mamedev/mame: Delivered hardware-emulation enhancements and reliability improvements with direct impact on data transfer performance, network accuracy, and cross-platform stability. Highlights include DMA-related enhancements and glue logic for CZ-7BS1 on X68k, centralized network packet filtering fixes to improve broadcast/multicast handling, MSVC build robustness improvements, and broad code-quality and compiler-warning cleanups.
6 Commits • 2 Features
Apr 1, 2025April 2025 for mamedev/mame: Delivered hardware-emulation enhancements and reliability improvements with direct impact on data transfer performance, network accuracy, and cross-platform stability. Highlights include DMA-related enhancements and glue logic for CZ-7BS1 on X68k, centralized network packet filtering fixes to improve broadcast/multicast handling, MSVC build robustness improvements, and broad code-quality and compiler-warning cleanups.
April 2025
March 2025
8 Commits • 3 Features
Mar 1, 2025Month 2025-03 — Consolidated key features and stability improvements in the MAME codebase, delivering practical emulation enhancements and clearer maintenance paths across multiple subsystems. Focused on reliability, device coverage, and simpler debugging workflows to deliver measurable business value for end users and contributors.
March 2025
8 Commits • 3 Features
Mar 1, 2025Month 2025-03 — Consolidated key features and stability improvements in the MAME codebase, delivering practical emulation enhancements and clearer maintenance paths across multiple subsystems. Focused on reliability, device coverage, and simpler debugging workflows to deliver measurable business value for end users and contributors.
February 2025
5 Commits • 1 Features
Feb 1, 2025February 2025 – MAME (mamedev/mame) focus: strengthen Multibus integration, stabilize Multibus configurations, and enable broader firmware support with MMU integration and Sun-1 support. Delivered targeted feature work and a critical stability fix that improves reliability and hardware compatibility.
5 Commits • 1 Features
Feb 1, 2025February 2025 – MAME (mamedev/mame) focus: strengthen Multibus integration, stabilize Multibus configurations, and enable broader firmware support with MMU integration and Sun-1 support. Delivered targeted feature work and a critical stability fix that improves reliability and hardware compatibility.
February 2025
January 2025
21 Commits • 10 Features
Jan 1, 2025January 2025: Focused on improving emulator accuracy, build stability, and progressing toward full system parity across mamedev/mame. Key work included DS1215 emulation modernization with simplified modes and reduced logging, Genie command-line escaping fix (#13150), and MSVC warning cleanup with Windows build hygiene. Device parity progressed with VME/enp10 improvements to a working state and SGI IP4 fixes adding tape support; a skeleton SGI GM1 card was added. X68K gained serial mouse support, and mg1 improvements advanced stability around display handling. Several systems were promoted to working status, and targeted reset/interrupt timing bugs were addressed. To simplify maintenance, legacy device support was deprecated where appropriate.
January 2025
21 Commits • 10 Features
Jan 1, 2025January 2025: Focused on improving emulator accuracy, build stability, and progressing toward full system parity across mamedev/mame. Key work included DS1215 emulation modernization with simplified modes and reduced logging, Genie command-line escaping fix (#13150), and MSVC warning cleanup with Windows build hygiene. Device parity progressed with VME/enp10 improvements to a working state and SGI IP4 fixes adding tape support; a skeleton SGI GM1 card was added. X68K gained serial mouse support, and mg1 improvements advanced stability around display handling. Several systems were promoted to working status, and targeted reset/interrupt timing bugs were addressed. To simplify maintenance, legacy device support was deprecated where appropriate.
December 2024
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for mamedev/mame focusing on key deliverables, bug fixes, and impact: - Key features delivered: VME bus configuration enhancements and SGI IP4 integration, including improved logging for interrupt acknowledgment and bus errors, plus NVRAM access mapping for VMEs and integration with VME signals. - Major bugs fixed: (1) Cross-platform MPARAM flag restoration in Genie build system to fix parameter handling issues on macOS and Linux; (2) ns32532 device reset register initialization fix to ensure proper reset by zeroing MCR, MSR, and DCR during reset. - Overall impact: Increased cross-platform build stability, more accurate and reliable emulation for VME-based systems, and improved diagnostics and error handling, reducing maintenance overhead and accelerating issue resolution. - Technologies/skills demonstrated: build system repair (Genie), low-level hardware emulation initialization (ns32532), VME bus configuration and error handling, improved logging/diagnostics, cross-platform development, and contribution to SGI IP4 integration. This work delivers clear business value by reducing build failures on non-Windows platforms, improving the fidelity of emulation for SGI IP4 with VME support, and strengthening the engineering team's ability to diagnose and address issues quickly.
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for mamedev/mame focusing on key deliverables, bug fixes, and impact: - Key features delivered: VME bus configuration enhancements and SGI IP4 integration, including improved logging for interrupt acknowledgment and bus errors, plus NVRAM access mapping for VMEs and integration with VME signals. - Major bugs fixed: (1) Cross-platform MPARAM flag restoration in Genie build system to fix parameter handling issues on macOS and Linux; (2) ns32532 device reset register initialization fix to ensure proper reset by zeroing MCR, MSR, and DCR during reset. - Overall impact: Increased cross-platform build stability, more accurate and reliable emulation for VME-based systems, and improved diagnostics and error handling, reducing maintenance overhead and accelerating issue resolution. - Technologies/skills demonstrated: build system repair (Genie), low-level hardware emulation initialization (ns32532), VME bus configuration and error handling, improved logging/diagnostics, cross-platform development, and contribution to SGI IP4 integration. This work delivers clear business value by reducing build failures on non-Windows platforms, improving the fidelity of emulation for SGI IP4 with VME support, and strengthening the engineering team's ability to diagnose and address issues quickly.
December 2024
November 2024
5 Commits • 4 Features
Nov 1, 2024November 2024 (2024-11) focused on delivering core device emulation enhancements and build-system stability for mamedev/mame, including new time-string exposure for the 1801VP128 device, model-name disambiguation for XM3301TA, support for Tadpole TP880V VME SBC, and a GENie build-system upgrade to improve cross-platform builds and Windows compatibility. These changes enhance emulation accuracy, device interoperability, hardware coverage, and developer productivity, with improved maintainability via standardized naming and build processes.
November 2024
5 Commits • 4 Features
Nov 1, 2024November 2024 (2024-11) focused on delivering core device emulation enhancements and build-system stability for mamedev/mame, including new time-string exposure for the 1801VP128 device, model-name disambiguation for XM3301TA, support for Tadpole TP880V VME SBC, and a GENie build-system upgrade to improve cross-platform builds and Windows compatibility. These changes enhance emulation accuracy, device interoperability, hardware coverage, and developer productivity, with improved maintainability via standardized naming and build processes.
Activity
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Quality Metrics
Correctness88.2%
Maintainability86.4%
Architecture83.8%
Performance79.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
AssemblyCC++LuaMakefileShellcluamakefile
Technical Skills
Assembly LanguageBitwise OperationsBuild FixesBuild SystemBuild SystemsBuild configurationBus ProtocolsC++C++ DevelopmentC++ developmentC++ programmingCMakeCPU EmulationCode ClarityCode Refactoring
Repositories Contributed To
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