mamedev/mame
Oct 2024 – Oct 2025
13 Months active
Languages Used
C++AssemblyCXMLLua
Technical Skills
AssemblyC++EmulationHardware AnalysisReverse EngineeringSystem Integration
Ivan Vangelista
PROFILE
Ivan Vangelista
Over thirteen months, Mesgnet contributed to the mamedev/mame repository by expanding arcade hardware emulation and improving catalog accuracy. He engineered new working systems and clones, enhanced ROM and PROM data integrity, and consolidated drivers to streamline maintenance. Using C++ and Assembly, Mesgnet implemented low-level emulation features, refined input handling, and introduced cryptography and decryption routines to support additional hardware sets. His work included debugging, memory management, and code refactoring, which improved build stability and data fidelity. By integrating new device drivers and refining system configurations, Mesgnet enabled broader hardware support and more reliable, testable emulation for the MAME project.
Overall Statistics
Feature vs Bugs
65%Features
Repository Contributions
361Total
Bugs
63
Commits
361
Features
116
Lines of code
83,917
Activity Months13
Your Network
78 people
Work History
October 2025
20 Commits • 3 Features
Oct 1, 2025October 2025 performance summary for mamedev/mame focused on delivering higher fidelity emulation, expanding platform coverage, and stabilizing core subsystems to drive broader hardware support and user value.
20 Commits • 3 Features
Oct 1, 2025October 2025 performance summary for mamedev/mame focused on delivering higher fidelity emulation, expanding platform coverage, and stabilizing core subsystems to drive broader hardware support and user value.
October 2025
September 2025
38 Commits • 12 Features
Sep 1, 2025In September 2025, the mamedev/mame work focused on improving catalog accuracy, expanding hardware emulation, and strengthening the codebase through targeted maintenance and data updates. The month delivered a mix of status management, new playable content, hardware support, and driver/data improvements that collectively raise user value and maintainability.
September 2025
38 Commits • 12 Features
Sep 1, 2025In September 2025, the mamedev/mame work focused on improving catalog accuracy, expanding hardware emulation, and strengthening the codebase through targeted maintenance and data updates. The month delivered a mix of status management, new playable content, hardware support, and driver/data improvements that collectively raise user value and maintainability.
August 2025
31 Commits • 10 Features
Aug 1, 2025August 2025 (mamedev/mame) focused on expanding clone coverage, ensuring data accuracy, and improving maintenance efficiency. Key deliverables include expanding working clone data, validating ROM and PROM data, and consolidating drivers to reduce future toil, all aimed at stronger data integrity and faster verification of new hardware.
31 Commits • 10 Features
Aug 1, 2025August 2025 (mamedev/mame) focused on expanding clone coverage, ensuring data accuracy, and improving maintenance efficiency. Key deliverables include expanding working clone data, validating ROM and PROM data, and consolidating drivers to reduce future toil, all aimed at stronger data integrity and faster verification of new hardware.
August 2025
July 2025
39 Commits • 8 Features
Jul 1, 2025July 2025 performance summary for mamedev/mame: Delivered multiple new working systems and clones, improved ROM handling and patching reliability, and enhanced overall catalog accuracy. Implementations emphasize business value via expanded test coverage, playable entries, and maintainable code.
July 2025
39 Commits • 8 Features
Jul 1, 2025July 2025 performance summary for mamedev/mame: Delivered multiple new working systems and clones, improved ROM handling and patching reliability, and enhanced overall catalog accuracy. Implementations emphasize business value via expanded test coverage, playable entries, and maintainable code.
June 2025
26 Commits • 7 Features
Jun 1, 2025June 2025 — mamedev/mame: Focused on improving data accuracy, expanding the playable catalog, and advancing cryptography/driver quality. Key outcomes include precise not-working/working status flags for new systems and clones, expanded working entries across hardware and software lists, cryptography/decryption enhancements enabling more sets, and targeted stability fixes to prevent regressions.
26 Commits • 7 Features
Jun 1, 2025June 2025 — mamedev/mame: Focused on improving data accuracy, expanding the playable catalog, and advancing cryptography/driver quality. Key outcomes include precise not-working/working status flags for new systems and clones, expanded working entries across hardware and software lists, cryptography/decryption enhancements enabling more sets, and targeted stability fixes to prevent regressions.
June 2025
May 2025
28 Commits • 19 Features
May 1, 2025May 2025 (mamedev/mame): Focused on improving catalog integrity, expanding working clone coverage, and hardening emulation data through ROM/decryption fixes, address-map validation, and hardware fidelity improvements. Key features delivered include marking new clones and systems as not working to reflect current hardware availability, adding a new working Rollergames (Asia) clone, and introducing new working clones Super Star 97 and Ming Xing 97, along with multiple ROM/data enhancements (ROM additions, xGRB format, PLD dumps). Major bug fixes address crash risks and decryption issues (lhb2cpgs, lhb3/tygn address maps), correct parent/clone relationships, and ensure actual XTALs are used on PCBs. These changes improve data quality, stability, and testability, enabling more accurate user experiences and faster onboarding for contributors. Technologies demonstrated include ROM decryption and protection patches, address-map debugging, Oki banking, data format support (xGRB), PLD data dumps, and hardware fidelity improvements.
May 2025
28 Commits • 19 Features
May 1, 2025May 2025 (mamedev/mame): Focused on improving catalog integrity, expanding working clone coverage, and hardening emulation data through ROM/decryption fixes, address-map validation, and hardware fidelity improvements. Key features delivered include marking new clones and systems as not working to reflect current hardware availability, adding a new working Rollergames (Asia) clone, and introducing new working clones Super Star 97 and Ming Xing 97, along with multiple ROM/data enhancements (ROM additions, xGRB format, PLD dumps). Major bug fixes address crash risks and decryption issues (lhb2cpgs, lhb3/tygn address maps), correct parent/clone relationships, and ensure actual XTALs are used on PCBs. These changes improve data quality, stability, and testability, enabling more accurate user experiences and faster onboarding for contributors. Technologies demonstrated include ROM decryption and protection patches, address-map debugging, Oki banking, data format support (xGRB), PLD data dumps, and hardware fidelity improvements.
April 2025
16 Commits • 11 Features
Apr 1, 2025April 2025 (mamedev/mame) focused on improving build stability, expanding hardware coverage, and laying groundwork for future emulation features. Key work included driver cleanups and CLE68K progress, new ROM sets and systems, and targeted bug fixes that enhance reliability and scalability across the project. The month also deepened support for VRAM/NVRAM, ROM data accuracy, and clone expansion to support a broader set of arcade hardware.
16 Commits • 11 Features
Apr 1, 2025April 2025 (mamedev/mame) focused on improving build stability, expanding hardware coverage, and laying groundwork for future emulation features. Key work included driver cleanups and CLE68K progress, new ROM sets and systems, and targeted bug fixes that enhance reliability and scalability across the project. The month also deepened support for VRAM/NVRAM, ROM data accuracy, and clone expansion to support a broader set of arcade hardware.
April 2025
March 2025
38 Commits • 9 Features
Mar 1, 20252025-03 Monthly summary for mamedev/mame focusing on business value and technical achievements. Highlights include batch updates to system status catalog (not working vs. working), expansion of working and non-working clones, and targeted ROM/graphics improvements that enhance accuracy, playability, and data integrity across titles. Key features delivered: - Batch adding of new systems marked not working to improve catalog accuracy and triage. Includes titles such as Flower World 3, Huahua Shijie 5, Magical Tonic Part 2, Da Fu Wang III, and others across CN/Japan sets. - Added new working systems and clones: Lian Huan Pao - ATT II/ATT III; Xingyun Dou Dizhu; Majiang Caihui Ying (ver 2.20); Toffy (unencrypted); Chong Chong Le Yuan (V100CN); New working clones across IGS/CN sets. - IGS cjsjh: completed PCB infos and EEPROM dump, enriching metadata for emulation fidelity. - Spoker: fixed jinhuang decryption and memory map, reducing mis-decryptions and stability issues. - GFX ROM maintenance and dumps: redumped GFX ROMs for cjdlz; fixed GFX for cjldp; dumped GFX for cjsjh; improved color decoding. - Video improvements: IGS M027/033vid long-form work with tile/oki banking, video enable, color flags, bitplane order fixes; IGS 68k 023vid: added preliminary inputs for xypmd set. - ROM set and metadata hygiene: fix for romset change commit; missing GFX ROM dump for xymga; clone status updates for new clones not working. Major impact: - Higher catalog accuracy and faster triage for new entries; improved emulation fidelity and color/graphics correctness; more playable and faithful reproductions across multiple sets; reduced maintenance risk by consolidating updates under coherent commits. Technologies/skills demonstrated: - C/C++ code and data integrity work in core emulation (graphics, video, memory maps, decryption, inputs). - Data curation: PCB/EEPROM metadata, ROM dumps, bitplane and color handling. - Cross-team collaboration across dyq, little0, Guru, Hammy, The Dumping Union, and others.
March 2025
38 Commits • 9 Features
Mar 1, 20252025-03 Monthly summary for mamedev/mame focusing on business value and technical achievements. Highlights include batch updates to system status catalog (not working vs. working), expansion of working and non-working clones, and targeted ROM/graphics improvements that enhance accuracy, playability, and data integrity across titles. Key features delivered: - Batch adding of new systems marked not working to improve catalog accuracy and triage. Includes titles such as Flower World 3, Huahua Shijie 5, Magical Tonic Part 2, Da Fu Wang III, and others across CN/Japan sets. - Added new working systems and clones: Lian Huan Pao - ATT II/ATT III; Xingyun Dou Dizhu; Majiang Caihui Ying (ver 2.20); Toffy (unencrypted); Chong Chong Le Yuan (V100CN); New working clones across IGS/CN sets. - IGS cjsjh: completed PCB infos and EEPROM dump, enriching metadata for emulation fidelity. - Spoker: fixed jinhuang decryption and memory map, reducing mis-decryptions and stability issues. - GFX ROM maintenance and dumps: redumped GFX ROMs for cjdlz; fixed GFX for cjldp; dumped GFX for cjsjh; improved color decoding. - Video improvements: IGS M027/033vid long-form work with tile/oki banking, video enable, color flags, bitplane order fixes; IGS 68k 023vid: added preliminary inputs for xypmd set. - ROM set and metadata hygiene: fix for romset change commit; missing GFX ROM dump for xymga; clone status updates for new clones not working. Major impact: - Higher catalog accuracy and faster triage for new entries; improved emulation fidelity and color/graphics correctness; more playable and faithful reproductions across multiple sets; reduced maintenance risk by consolidating updates under coherent commits. Technologies/skills demonstrated: - C/C++ code and data integrity work in core emulation (graphics, video, memory maps, decryption, inputs). - Data curation: PCB/EEPROM metadata, ROM dumps, bitplane and color handling. - Cross-team collaboration across dyq, little0, Guru, Hammy, The Dumping Union, and others.
February 2025
19 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for mamedev/mame. The focus this month was expanding arcade system coverage, refining data fidelity, and improving the overall reliability of ROM/PLD metadata to support higher emulation accuracy and a smoother user experience. Delivered a substantial set of new and updated drivers, implemented essential data hygiene fixes, and demonstrated strong collaboration across contributors and reviewers.
19 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for mamedev/mame. The focus this month was expanding arcade system coverage, refining data fidelity, and improving the overall reliability of ROM/PLD metadata to support higher emulation accuracy and a smoother user experience. Delivered a substantial set of new and updated drivers, implemented essential data hygiene fixes, and demonstrated strong collaboration across contributors and reviewers.
February 2025
January 2025
34 Commits • 19 Features
Jan 1, 2025January 2025 performance summary for mamedev/mame: Expanded the emulation catalog and data fidelity through a mix of new working clones/systems, ROM/data dumps, and targeted bug fixes. Key contributions include adding several new working clones and systems, updating ROM/dump data for improved accuracy, and stabilizing core behavior with initialization and DIP-switch fixes. The work delivered clear business value: broader, more accurate arcade emulation, improved testing coverage, and reduced risk of regressions in future releases.
January 2025
34 Commits • 19 Features
Jan 1, 2025January 2025 performance summary for mamedev/mame: Expanded the emulation catalog and data fidelity through a mix of new working clones/systems, ROM/data dumps, and targeted bug fixes. Key contributions include adding several new working clones and systems, updating ROM/dump data for improved accuracy, and stabilizing core behavior with initialization and DIP-switch fixes. The work delivered clear business value: broader, more accurate arcade emulation, improved testing coverage, and reduced risk of regressions in future releases.
December 2024
29 Commits • 6 Features
Dec 1, 2024December 2024 highlights for mamedev/mame: Expanded hardware coverage with multiple new working systems and clones; strengthened data quality through targeted curation and ROM/PLD/Prom updates; refined metadata; and improved build reliability. These efforts enhance emulator fidelity, accelerate contributor onboarding, and improve dataset accuracy for testing and release readiness.
29 Commits • 6 Features
Dec 1, 2024December 2024 highlights for mamedev/mame: Expanded hardware coverage with multiple new working systems and clones; strengthened data quality through targeted curation and ROM/PLD/Prom updates; refined metadata; and improved build reliability. These efforts enhance emulator fidelity, accelerate contributor onboarding, and improve dataset accuracy for testing and release readiness.
December 2024
November 2024
40 Commits • 8 Features
Nov 1, 2024November 2024 (2024-11) performance summary for mamedev/mame. The month focused on expanding playable coverage, improving data fidelity, and stabilizing the codebase across multiple drivers and data pipelines. Key gains include new working clones and systems, targeted ROM/CPU/Data dumps, driver enhancements, and several bug fixes that reduce regressions and improve user-facing accuracy. Key features delivered: - Added working clones and systems across several titles: Jack Potten's Poker (set 14, ICP-1 PCB); Golden Poker Double Up (bootleg, set 5); Jungle King (V200PR) and Tarzan variants; Ukiyo Box (Japan, v1.3.7); Thunder Heroes (set 2); Mad Motor prototype (set 2); Lode Runner III – Majin no Fukkatsu (Japan, rev. C); Carnival (ManilaMatic bootleg); Wantouchable; Janyou Part II (ver 7.03) and the Double Bet Mahjong bootleg; Punk Shot (Asia 2 Players, hacked). - JumpBugBC support added for the galaxian driver, expanding compatibility with recent hardware revisions. - Data dumps and PROM support added: PROM dump for Mad Motor; MCU dump for NSPIRIT; PAL dumps for Dracula (cdracula); PAL dump for unkbel. - Status updates and new working entries: Joker Card (encrypted) added as a working system; targeted not-working updates across CPS1 Multi Game, Lucky Star, Lucky 88, to reflect current realities. - Code and graphics quality improvements: GFX improvements for Guchokipa; VT1682.cpp code adjustments per Vas; and continued graph structure hardening. Major bugs fixed: - MT08973 regression fixes in CVS Quasar (two commits in succession). - Fixed missing text layer disable at game start to prevent flickering (deadang/related drivers). - Added missing MNW flag for luckstrn to ensure proper behavior. - Corrected hashes for hilice in skeleton/vgame.cpp. - Fixed compile error in bus/interpro/keyboard/hle.h. Overall impact and accomplishments: - Significantly broadened emulation coverage and accuracy, increasing end-user playable titles and validity of clone data for historically accurate collections. - Improved data fidelity through targeted dumps (MCU/PAL) and better ROM/clone identification, reducing maintenance toil and speeding future integrations. - Strengthened code quality and stability across drivers and tooling, enabling faster onboarding and more reliable releases. Technologies/skills demonstrated: - Proficient C/C++ driver logic changes, ROM/PCB-level debugging, and data handling (PROM/MCU/PAL dumps). - Cross-repo collaboration with teams (Ioannis Bampoulas, Hammy, Darksoft, TeamEurope, etc.) and clear attribution in commit history. - Emulation accuracy enhancements (graphical/GFX fixes, dips identification), build stability improvements, and regression prevention.
November 2024
40 Commits • 8 Features
Nov 1, 2024November 2024 (2024-11) performance summary for mamedev/mame. The month focused on expanding playable coverage, improving data fidelity, and stabilizing the codebase across multiple drivers and data pipelines. Key gains include new working clones and systems, targeted ROM/CPU/Data dumps, driver enhancements, and several bug fixes that reduce regressions and improve user-facing accuracy. Key features delivered: - Added working clones and systems across several titles: Jack Potten's Poker (set 14, ICP-1 PCB); Golden Poker Double Up (bootleg, set 5); Jungle King (V200PR) and Tarzan variants; Ukiyo Box (Japan, v1.3.7); Thunder Heroes (set 2); Mad Motor prototype (set 2); Lode Runner III – Majin no Fukkatsu (Japan, rev. C); Carnival (ManilaMatic bootleg); Wantouchable; Janyou Part II (ver 7.03) and the Double Bet Mahjong bootleg; Punk Shot (Asia 2 Players, hacked). - JumpBugBC support added for the galaxian driver, expanding compatibility with recent hardware revisions. - Data dumps and PROM support added: PROM dump for Mad Motor; MCU dump for NSPIRIT; PAL dumps for Dracula (cdracula); PAL dump for unkbel. - Status updates and new working entries: Joker Card (encrypted) added as a working system; targeted not-working updates across CPS1 Multi Game, Lucky Star, Lucky 88, to reflect current realities. - Code and graphics quality improvements: GFX improvements for Guchokipa; VT1682.cpp code adjustments per Vas; and continued graph structure hardening. Major bugs fixed: - MT08973 regression fixes in CVS Quasar (two commits in succession). - Fixed missing text layer disable at game start to prevent flickering (deadang/related drivers). - Added missing MNW flag for luckstrn to ensure proper behavior. - Corrected hashes for hilice in skeleton/vgame.cpp. - Fixed compile error in bus/interpro/keyboard/hle.h. Overall impact and accomplishments: - Significantly broadened emulation coverage and accuracy, increasing end-user playable titles and validity of clone data for historically accurate collections. - Improved data fidelity through targeted dumps (MCU/PAL) and better ROM/clone identification, reducing maintenance toil and speeding future integrations. - Strengthened code quality and stability across drivers and tooling, enabling faster onboarding and more reliable releases. Technologies/skills demonstrated: - Proficient C/C++ driver logic changes, ROM/PCB-level debugging, and data handling (PROM/MCU/PAL dumps). - Cross-repo collaboration with teams (Ioannis Bampoulas, Hammy, Darksoft, TeamEurope, etc.) and clear attribution in commit history. - Emulation accuracy enhancements (graphical/GFX fixes, dips identification), build stability improvements, and regression prevention.
October 2024
3 Commits • 3 Features
Oct 1, 2024October 2024 monthly summary for mamedev/mame focusing on Dynasty arcade system support, Puzzlet clock refinements, and Captain X / Batman Forever variants. Deliveries strengthen hardware coverage and emulation fidelity, enabling more accurate gameplay experience and broader clone support.
3 Commits • 3 Features
Oct 1, 2024October 2024 monthly summary for mamedev/mame focusing on Dynasty arcade system support, Puzzlet clock refinements, and Captain X / Batman Forever variants. Deliveries strengthen hardware coverage and emulation fidelity, enabling more accurate gameplay experience and broader clone support.
October 2024
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Quality Metrics
Correctness83.2%
Maintainability84.4%
Architecture80.4%
Performance71.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
AssemblyCC++LuaXML
Technical Skills
Arcade Game DevelopmentAssemblyAudio Hardware EmulationBug FixBuild System ConfigurationBuild SystemsC++C++ DevelopmentC++ ProgrammingCode ConsolidationCode CorrectionCode RefactoringCompiler CompatibilityConfigurationConfiguration Management
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