mamedev/mame
Nov 2024 – Feb 2026
12 Months active
Languages Used
CC++XMLAssemblyLua
Technical Skills
C++Code RefactoringDevice DriversEmulationEmulator DevelopmentReverse Engineering
Nigel Barnes
PROFILE
Nigel Barnes
Nick Barnes contributed to the mamedev/mame repository by expanding hardware emulation coverage and improving system fidelity across legacy platforms. He engineered new device integrations, enhanced ROM and software list management, and refactored core emulation modules for maintainability and accuracy. Using C++ and XML, Nick implemented low-level hardware interfaces, memory management routines, and input handling improvements, addressing both feature development and critical bug fixes. His work included adding support for new expansion cards, refining audio and video emulation, and modernizing driver architectures. These efforts resulted in broader compatibility, more accurate emulation, and a more robust codebase for future development.
Overall Statistics
Feature vs Bugs
83%Features
Repository Contributions
106Total
Bugs
12
Commits
106
Features
58
Lines of code
45,731
Activity Months12
Your Network
106 peopleWork History
February 2026
5 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for mamedev/mame focusing on business value and technical achievements. Highlighted deliverables include improved emulation accuracy, expanded software catalog for BBC Micro, and enhanced user feedback through UI/UX improvements. The work demonstrates strong low-level emulation skills, asset management, and cross-repo collaboration.
5 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for mamedev/mame focusing on business value and technical achievements. Highlighted deliverables include improved emulation accuracy, expanded software catalog for BBC Micro, and enhanced user feedback through UI/UX improvements. The work demonstrates strong low-level emulation skills, asset management, and cross-repo collaboration.
February 2026
January 2026
5 Commits • 3 Features
Jan 1, 2026January 2026 (2026-01) summary of contributions across the mamedev/mame repository. Delivered multi-project emulation enhancements with strong cross-domain impact: Pencil 2 expansion and ColecoVision integration, BBC Micro ecosystem enhancements, and a Multitech Speech Synthesizer Board variant with reliability fixes. The work expands hardware support, improves software library compatibility, and enhances user experience through more complete and accurate emulation.
January 2026
5 Commits • 3 Features
Jan 1, 2026January 2026 (2026-01) summary of contributions across the mamedev/mame repository. Delivered multi-project emulation enhancements with strong cross-domain impact: Pencil 2 expansion and ColecoVision integration, BBC Micro ecosystem enhancements, and a Multitech Speech Synthesizer Board variant with reliability fixes. The work expands hardware support, improves software library compatibility, and enhances user experience through more complete and accurate emulation.
November 2025
11 Commits • 3 Features
Nov 1, 2025November 2025: Expanded hardware emulation and software support across mamedev/mame. Delivered new devices and interfaces, improved timing accuracy, and broadened software lists. Fixed a critical sound timing bug in MOS8580 for coco_xsid_device, increasing audio fidelity and system stability. The work enhances compatibility with legacy hardware, preserves historic software, and provides more accurate reproductions for researchers and enthusiasts.
11 Commits • 3 Features
Nov 1, 2025November 2025: Expanded hardware emulation and software support across mamedev/mame. Delivered new devices and interfaces, improved timing accuracy, and broadened software lists. Fixed a critical sound timing bug in MOS8580 for coco_xsid_device, increasing audio fidelity and system stability. The work enhances compatibility with legacy hardware, preserves historic software, and provides more accurate reproductions for researchers and enthusiasts.
November 2025
October 2025
6 Commits • 5 Features
Oct 1, 2025October 2025 (2025-10) summary for mamedev/mame focusing on business value and technical achievement. Delivered broader hardware emulation coverage and improved observability, enabling more accurate real-world hardware representation and faster debugging. Key deliverables include BIOS option extensions for Brazil v-.006 and BBC Micro Caspl MOS 3.43, Acorn AKA30 SCSI Expansion Card support, CoCo X-SID cartridge integration, and a refactor to centralize logging via logmacro, plus groundwork for a new Daphor 32 system driver (not working yet due to missing schematics). These efforts collectively expand device coverage, enhance debugging efficiency, and establish a platform for future capabilities.
October 2025
6 Commits • 5 Features
Oct 1, 2025October 2025 (2025-10) summary for mamedev/mame focusing on business value and technical achievement. Delivered broader hardware emulation coverage and improved observability, enabling more accurate real-world hardware representation and faster debugging. Key deliverables include BIOS option extensions for Brazil v-.006 and BBC Micro Caspl MOS 3.43, Acorn AKA30 SCSI Expansion Card support, CoCo X-SID cartridge integration, and a refactor to centralize logging via logmacro, plus groundwork for a new Daphor 32 system driver (not working yet due to missing schematics). These efforts collectively expand device coverage, enhance debugging efficiency, and establish a platform for future capabilities.
September 2025
20 Commits • 8 Features
Sep 1, 2025September 2025 highlights for mamedev/mame: Delivered substantial BBC-related emulation enhancements, expanded hardware coverage, and foundational refactors that improve fidelity, stability, and maintainability. Key achievements include improved ROMSEL handling for BBC Master, wide-ranging codebase encapsulation refactors across BBC emulation modules, updated BBC software lists, expanded analogue input support, new expansion devices, and stability improvements across audio and IRQ/serial paths, along with memory/configuration enhancements and multilingual ROM support.
20 Commits • 8 Features
Sep 1, 2025September 2025 highlights for mamedev/mame: Delivered substantial BBC-related emulation enhancements, expanded hardware coverage, and foundational refactors that improve fidelity, stability, and maintainability. Key achievements include improved ROMSEL handling for BBC Master, wide-ranging codebase encapsulation refactors across BBC emulation modules, updated BBC software lists, expanded analogue input support, new expansion devices, and stability improvements across audio and IRQ/serial paths, along with memory/configuration enhancements and multilingual ROM support.
September 2025
August 2025
15 Commits • 9 Features
Aug 1, 2025August 2025 was a focused sprint of feature enrichments, broad hardware coverage, and stability improvements across mamedev/mame. The month delivered targeted ROM accuracy updates, expanded format and device support, strategic refactors for maintainability, and critical bug fixes that enhance emulation fidelity and reliability. These efforts reduce user-reported issues, broaden platform coverage, and improve configuration and signaling capabilities for expansion hardware.
August 2025
15 Commits • 9 Features
Aug 1, 2025August 2025 was a focused sprint of feature enrichments, broad hardware coverage, and stability improvements across mamedev/mame. The month delivered targeted ROM accuracy updates, expanded format and device support, strategic refactors for maintainability, and critical bug fixes that enhance emulation fidelity and reliability. These efforts reduce user-reported issues, broaden platform coverage, and improve configuration and signaling capabilities for expansion hardware.
July 2025
5 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary for mamedev/mame: Focused on enhancing user input fidelity, expanding hardware emulation coverage, and simplifying configuration to reduce maintenance while delivering tangible business value. Highlights include keyboard/input improvements across emulation, introduction of Votrax TNT device support, Acorn Atom expansion with RAMROM/AtoMMC integration, and a unified PAL/NTSC configuration for MC6847. These changes increase hardware compatibility, improve user experience, and streamline development and testing.
5 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary for mamedev/mame: Focused on enhancing user input fidelity, expanding hardware emulation coverage, and simplifying configuration to reduce maintenance while delivering tangible business value. Highlights include keyboard/input improvements across emulation, introduction of Votrax TNT device support, Acorn Atom expansion with RAMROM/AtoMMC integration, and a unified PAL/NTSC configuration for MC6847. These changes increase hardware compatibility, improve user experience, and streamline development and testing.
July 2025
June 2025
18 Commits • 10 Features
Jun 1, 2025June 2025 focused on expanding emulation fidelity, broadening hardware support, and strengthening maintainability across the mamedev/mame project. Delivered new I/O capabilities and bus/interface improvements, integrated teletext/video generation support, and refreshed software lists. Fixed key input and video rendering issues to stabilize user experience and accuracy for diverse systems. The work combines hardware-level emulation, cross-system bus innovations, and code hygiene to enable faster iteration and higher-quality releases.
June 2025
18 Commits • 10 Features
Jun 1, 2025June 2025 focused on expanding emulation fidelity, broadening hardware support, and strengthening maintainability across the mamedev/mame project. Delivered new I/O capabilities and bus/interface improvements, integrated teletext/video generation support, and refreshed software lists. Fixed key input and video rendering issues to stabilize user experience and accuracy for diverse systems. The work combines hardware-level emulation, cross-system bus innovations, and code hygiene to enable faster iteration and higher-quality releases.
April 2025
3 Commits • 2 Features
Apr 1, 2025April 2025: MAME (mamedev/mame) delivered targeted Psion/Siena emulation enhancements and code quality improvements, increasing device coverage and ROM integrity without altering existing behavior. The changes expand business value by enabling more accurate Psion emulation and reducing future maintenance risk, while keeping performance stable.
3 Commits • 2 Features
Apr 1, 2025April 2025: MAME (mamedev/mame) delivered targeted Psion/Siena emulation enhancements and code quality improvements, increasing device coverage and ROM integrity without altering existing behavior. The changes expand business value by enabling more accurate Psion emulation and reducing future maintenance risk, while keeping performance stable.
April 2025
March 2025
4 Commits • 2 Features
Mar 1, 2025March 2025 performance summary for mamedev/mame: Delivered foundational improvements to Psion emulation and consolidation that boost accuracy, maintainability, and model coverage. Key outcomes include updated RAM detection and LCD palette updates for Psion devices, simplified SSD state management, a unified Psion emulator with expanded keyboard support and ROM/RAM banking optimizations, and a corrected Acorn COS ROM with safer keyboard read behavior. These changes reduce state complexity, enable new working variants, and improve reliability for end users and core developers.
March 2025
4 Commits • 2 Features
Mar 1, 2025March 2025 performance summary for mamedev/mame: Delivered foundational improvements to Psion emulation and consolidation that boost accuracy, maintainability, and model coverage. Key outcomes include updated RAM detection and LCD palette updates for Psion devices, simplified SSD state management, a unified Psion emulator with expanded keyboard support and ROM/RAM banking optimizations, and a corrected Acorn COS ROM with safer keyboard read behavior. These changes reduce state complexity, enable new working variants, and improve reliability for end users and core developers.
February 2025
11 Commits • 8 Features
Feb 1, 2025Concise monthly summary for February 2025 (mamedev/mame): Continued expansion of supported software and hardware coverage, with substantial enhancements across emulation accuracy, development tooling, and system compatibility. The month delivered a mix of new device support, improved teletext and rendering, and refactors to stabilize and streamline the emulator core.
11 Commits • 8 Features
Feb 1, 2025Concise monthly summary for February 2025 (mamedev/mame): Continued expansion of supported software and hardware coverage, with substantial enhancements across emulation accuracy, development tooling, and system compatibility. The month delivered a mix of new device support, improved teletext and rendering, and refactors to stabilize and streamline the emulator core.
February 2025
November 2024
3 Commits • 2 Features
Nov 1, 2024November 2024 achievements focused on expanding Psion MC emulation in mamedev/mame, tightening software-availability metadata, and cleaning up codebase. Delivered support for MC200, MC400, MC Word, and MC Word (German) with new configurations and ROMs to enable accurate emulation across multiple Psion platforms; refactored power-on and status register handling to ensure correct initialization. Updated the psion_ssd software list to clearly mark working items (EROS Ver.4.0, MC Missile, Spreadsheet, System Disk variants), improving emulator reliability and user-facing compatibility. Fixed a build-related issue by removing an unused reset function in psion/mc400.cpp, reducing compiler warnings and improving code health.
November 2024
3 Commits • 2 Features
Nov 1, 2024November 2024 achievements focused on expanding Psion MC emulation in mamedev/mame, tightening software-availability metadata, and cleaning up codebase. Delivered support for MC200, MC400, MC Word, and MC Word (German) with new configurations and ROMs to enable accurate emulation across multiple Psion platforms; refactored power-on and status register handling to ensure correct initialization. Updated the psion_ssd software list to clearly mark working items (EROS Ver.4.0, MC Missile, Spreadsheet, System Disk variants), improving emulator reliability and user-facing compatibility. Fixed a build-related issue by removing an unused reset function in psion/mc400.cpp, reducing compiler warnings and improving code health.
Activity
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Quality Metrics
Correctness92.6%
Maintainability91.2%
Architecture90.2%
Performance86.0%
AI Usage20.2%
Skills & Technologies
Programming Languages
AssemblyCC++LuaXML
Technical Skills
Audio ProcessingBIOS IntegrationBuild SystemsBus ArchitectureBus SystemsC++C++ DevelopmentC++ developmentC++ programmingCPU EmulationCode CleanupCode OrganizationCode RefactoringData ManagementDebugging
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