mamedev/mame
Nov 2024 – Mar 2026
5 Months active
Languages Used
C++
Technical Skills
EmulationHardware SimulationMemory ManagementAudio EmulationReverse EngineeringGame Development
JOTEGO
PROFILE
Jotego
Jose Tejada contributed to the mamedev/mame repository by enhancing hardware emulation fidelity and stability across several classic arcade systems. Over five months, he focused on C++-based emulator development, addressing complex issues such as shared memory mapping, audio timing, and interrupt handling. His work included refining palette RAM access across CPU cores, calibrating refresh rates, and integrating accurate sound CPU interrupt frequencies. Jose also improved driver wiring to match hardware schematics and implemented robust sub-CPU reset logic. Leveraging skills in reverse engineering and embedded systems, he delivered targeted bug fixes and feature enhancements that reduced edge-case failures and improved emulation accuracy.
Overall Statistics
Feature vs Bugs
14%Features
Repository Contributions
7Total
Bugs
6
Commits
7
Features
1
Lines of code
341
Activity Months5
Your Network
107 peopleSame Organization
@jotego.es1
Work History
March 2026
3 Commits • 1 Features
Mar 1, 2026March 2026 — Monthly summary for mamedev/mame: Focused on stability and accuracy improvements in emulation. Implemented Calibr50 sub-CPU reset handling, fixed IRQ 5 enable bit handling for Rungun, and corrected SH7604 CPU emulation register access. These changes enhance stability, interrupt reliability, and DMA/interrupt vector handling, reducing edge-case failures in sound, video, and DMA operations. Result: more faithful hardware emulation, fewer regression-prone paths, and improved developer and user experience.
3 Commits • 1 Features
Mar 1, 2026March 2026 — Monthly summary for mamedev/mame: Focused on stability and accuracy improvements in emulation. Implemented Calibr50 sub-CPU reset handling, fixed IRQ 5 enable bit handling for Rungun, and corrected SH7604 CPU emulation register access. These changes enhance stability, interrupt reliability, and DMA/interrupt vector handling, reducing edge-case failures in sound, video, and DMA operations. Result: more faithful hardware emulation, fewer regression-prone paths, and improved developer and user experience.
March 2026
August 2025
1 Commits
Aug 1, 2025August 2025 (2025-08) monthly summary for mamedev/mame. Implemented TIM2 interrupt integration for glfgreat audio by using the k053260 TIM2 output as the interrupt source, including a TIM2 callback and a 500 Hz interrupt counting mechanism to ensure consistent audio timing. This change addresses audio timing gaps and reduces glitches in glfgreat, delivering more stable and faithful sound emulation.
August 2025
1 Commits
Aug 1, 2025August 2025 (2025-08) monthly summary for mamedev/mame. Implemented TIM2 interrupt integration for glfgreat audio by using the k053260 TIM2 output as the interrupt source, including a TIM2 callback and a 500 Hz interrupt counting mechanism to ensure consistent audio timing. This change addresses audio timing gaps and reduces glitches in glfgreat, delivering more stable and faithful sound emulation.
June 2025
1 Commits
Jun 1, 2025June 2025 monthly summary for mamedev/mame focused on code quality and hardware accuracy. Key change: driver hardware wiring cleanup in tmnt2 driver, removing an unnecessary NMI connection to the sound CPU that isn’t present in schematics. The change preserves sound functionality and fixes an issue related to the lgtnfght driver by aligning with hardware docs and removing a non-existent path.
1 Commits
Jun 1, 2025June 2025 monthly summary for mamedev/mame focused on code quality and hardware accuracy. Key change: driver hardware wiring cleanup in tmnt2 driver, removing an unnecessary NMI connection to the sound CPU that isn’t present in schematics. The change preserves sound functionality and fixes an issue related to the lgtnfght driver by aligning with hardware docs and removing a non-existent path.
June 2025
February 2025
1 Commits
Feb 1, 2025February 2025 (mamedev/mame) focused on improving emulator fidelity through targeted bug fixes in the Taito audio path. Delivered a precise fix to audio timing by correcting the sound CPU interrupt frequency to reflect the 8 MHz oscillator division, improving audio timing accuracy and alignment with original hardware.
February 2025
1 Commits
Feb 1, 2025February 2025 (mamedev/mame) focused on improving emulator fidelity through targeted bug fixes in the Taito audio path. Delivered a precise fix to audio timing by correcting the sound CPU interrupt frequency to reflect the 8 MHz oscillator division, improving audio timing accuracy and alignment with original hardware.
November 2024
1 Commits
Nov 1, 2024Month: 2024-11. Focused on stabilizing the Tehkan WC system emulation by fixing shared palette RAM access across CPU cores and calibrating the refresh rate for accurate timing. Delivered a targeted bug fix with clear commit reference. Impact: improved visual accuracy and cross-core consistency; reduced rendering artifacts and timing discrepancies in Tehkan WC gameplay emulation.
1 Commits
Nov 1, 2024Month: 2024-11. Focused on stabilizing the Tehkan WC system emulation by fixing shared palette RAM access across CPU cores and calibrating the refresh rate for accurate timing. Delivered a targeted bug fix with clear commit reference. Impact: improved visual accuracy and cross-core consistency; reduced rendering artifacts and timing discrepancies in Tehkan WC gameplay emulation.
November 2024
Activity
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Quality Metrics
Correctness88.6%
Maintainability85.8%
Architecture85.8%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++
Technical Skills
Audio EmulationC++ programmingEmulationGame DevelopmentHardware SimulationMemory ManagementReverse EngineeringSound Emulationembedded systemsemulator developmenthardware emulationhardware interfacing
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