OpenRakis/Spice86
Aug 2025 – Nov 2025
4 Months active
Languages Used
C#GitMarkdown
Technical Skills
Bug FixingConfigurationDOS InternalsDebuggingEmulator DevelopmentGit
Karl Lenz
PROFILE
Karl Lenz
Worked on the OpenRakis/Spice86 emulator, delivering features and fixes that enhanced DOS memory management, video subsystem accuracy, and debugging workflows. Applied C# and low-level programming skills to refactor process tracking, implement unit tests, and resolve a complex EGA/VGA bit-packing bug that improved per-pixel color fidelity for legacy games. Introduced JSON export for video card debug state, streamlining reproducibility and offline analysis. Maintained repository hygiene with Git and improved documentation for future maintainability. Focused on compatibility by implementing VGA write protection and regression testing across multiple titles, demonstrating a methodical approach to emulator development, debugging, and graphics programming challenges.
Overall Statistics
Feature vs Bugs
86%Features
Repository Contributions
9Total
Bugs
1
Commits
9
Features
6
Lines of code
2,123
Activity Months4
Your Network
8 peopleWork History
November 2025
1 Commits
Nov 1, 2025November 2025 focused on stabilizing video rendering accuracy in Spice86 by resolving a long-standing EGA/VGA Read Mode 1 bit-packing issue. The fix ensures precise per-pixel color matching across Cadaver and maintains compatibility with Exodus and Dune. The change strengthens the reliability of the video subsystem and reduces rendering-related bug reports, while showcasing the team's competencies in low-level emulation, debugging, and regression verification.
1 Commits
Nov 1, 2025November 2025 focused on stabilizing video rendering accuracy in Spice86 by resolving a long-standing EGA/VGA Read Mode 1 bit-packing issue. The fix ensures precise per-pixel color matching across Cadaver and maintains compatibility with Exodus and Dune. The change strengthens the reliability of the video subsystem and reduces rendering-related bug reports, while showcasing the team's competencies in low-level emulation, debugging, and regression verification.
November 2025
October 2025
1 Commits • 1 Features
Oct 1, 2025Concise monthly summary for 2025-10 focusing on business value and technical achievements from the Spice86 project.
October 2025
1 Commits • 1 Features
Oct 1, 2025Concise monthly summary for 2025-10 focusing on business value and technical achievements from the Spice86 project.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for OpenRakis/Spice86 focusing on delivering high-value debugging capabilities and state capture for reproducibility.
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for OpenRakis/Spice86 focusing on delivering high-value debugging capabilities and state capture for reproducibility.
September 2025
August 2025
6 Commits • 4 Features
Aug 1, 2025OpenRakis/Spice86 – August 2025: Delivered robust DOS memory management enhancements, a refactor for PSP tracking, minor tidy-ups in INT21H handler registration, and build hygiene improvements. These changes improve reliability, maintainability, and developer productivity while maintaining stable external behavior.
August 2025
6 Commits • 4 Features
Aug 1, 2025OpenRakis/Spice86 – August 2025: Delivered robust DOS memory management enhancements, a refactor for PSP tracking, minor tidy-ups in INT21H handler registration, and build hygiene improvements. These changes improve reliability, maintainability, and developer productivity while maintaining stable external behavior.
Activity
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Quality Metrics
Correctness98.8%
Maintainability93.4%
Architecture93.4%
Performance88.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
C#GitMarkdown
Technical Skills
Bug FixingC#ConfigurationDOS InternalsDebuggingDebugging ToolsDocumentationEmulator DevelopmentFile I/OGitLow-Level ProgrammingMemory ManagementObject-Oriented DesignRefactoringReverse Engineering
Repositories Contributed To
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