OpenRakis/Spice86
Feb 2025 – Jul 2025
5 Months active
Languages Used
C#MarkdownXAMLXML
Technical Skills
DebuggingEmulator DevelopmentLow-Level ProgrammingReverse EngineeringSystem DesignAI Assistance
Joris van Eijden
PROFILE
Joris Van Eijden
Worked on the OpenRakis/Spice86 emulator, delivering 27 features and resolving 10 bugs over five months. Focused on enhancing debugging workflows, stabilizing disassembly tooling, and improving emulator timing and memory safety. Applied C#, XAML, and Avalonia UI to refactor the debugger UX, implement deterministic DMA signaling, and optimize VRAM access. Unified the DisassemblyViewModel, improved asynchronous operations, and introduced syntax highlighting and theming for better UI clarity. Addressed low-level issues such as VGA cursor handling and out-of-bounds memory access, while maintaining code quality through rigorous refactoring, documentation cleanup, and test optimization to support reliable, maintainable development.
Overall Statistics
Feature vs Bugs
73%Features
Repository Contributions
63Total
Bugs
10
Commits
63
Features
27
Lines of code
18,782
Activity Months5
Your Network
7 peopleWork History
July 2025
2 Commits
Jul 1, 2025July 2025 monthly summary for OpenRakis/Spice86 focusing on emulator correctness, memory safety, and rendering fidelity. No new features were shipped this month; the work centered on stabilizing critical paths, improving correctness of text rendering, and hardening the memory model to prevent crashes. These changes translate to lower defect rates, more reliable builds, and a smoother developer experience.
2 Commits
Jul 1, 2025July 2025 monthly summary for OpenRakis/Spice86 focusing on emulator correctness, memory safety, and rendering fidelity. No new features were shipped this month; the work centered on stabilizing critical paths, improving correctness of text rendering, and hardening the memory model to prevent crashes. These changes translate to lower defect rates, more reliable builds, and a smoother developer experience.
July 2025
May 2025
2 Commits • 2 Features
May 1, 2025May 2025 performance highlights for OpenRakis/Spice86. Focused on delivering high-impact features, improving debugging UX, and cleaning code to boost maintainability and future velocity. No major bug fixes were required this month besides ongoing stability improvements.
May 2025
2 Commits • 2 Features
May 1, 2025May 2025 performance highlights for OpenRakis/Spice86. Focused on delivering high-impact features, improving debugging UX, and cleaning code to boost maintainability and future velocity. No major bug fixes were required this month besides ongoing stability improvements.
April 2025
11 Commits • 2 Features
Apr 1, 2025April 2025 performance summary for OpenRakis/Spice86: Focused on delivering a robust, user-friendly debugger experience and reducing maintenance overhead. Key work centered on a unified debugging UX, improved disassembly accuracy, and code/documentation cleanup to accelerate developer velocity and reduce noise. These efforts delivered tangible engineering value and reinforced product stability.
11 Commits • 2 Features
Apr 1, 2025April 2025 performance summary for OpenRakis/Spice86: Focused on delivering a robust, user-friendly debugger experience and reducing maintenance overhead. Key work centered on a unified debugging UX, improved disassembly accuracy, and code/documentation cleanup to accelerate developer velocity and reduce noise. These efforts delivered tangible engineering value and reinforced product stability.
April 2025
March 2025
46 Commits • 21 Features
Mar 1, 2025March 2025 performance summary for OpenRakis/Spice86: Focused on stabilizing core disassembly tooling, improving UI predictability, and hardening the debugger UX, while maintaining upstream compatibility. Key deliveries include disassembly view clone and stabilization, UI control migration to ListBox, debugger pause handling and current instruction highlighting, as well as significant disassembly/Registers UI enhancements, syntax highlighting improvements, and upstream maintenance. The effort yielded a more stable base, faster iteration, and clearer developer/debugger workflows. Technologies demonstrated include C#/.NET UI patterns, immutability design (SegmentedAddress), performance tuning, logging improvements, and AI tooling integration for requirements understanding.
March 2025
46 Commits • 21 Features
Mar 1, 2025March 2025 performance summary for OpenRakis/Spice86: Focused on stabilizing core disassembly tooling, improving UI predictability, and hardening the debugger UX, while maintaining upstream compatibility. Key deliveries include disassembly view clone and stabilization, UI control migration to ListBox, debugger pause handling and current instruction highlighting, as well as significant disassembly/Registers UI enhancements, syntax highlighting improvements, and upstream maintenance. The effort yielded a more stable base, faster iteration, and clearer developer/debugger workflows. Technologies demonstrated include C#/.NET UI patterns, immutability design (SegmentedAddress), performance tuning, logging improvements, and AI tooling integration for requirements understanding.
February 2025
2 Commits • 2 Features
Feb 1, 2025February 2025 (OpenRakis/Spice86) monthly summary focusing on key accomplishments, features delivered, major bugs fixed, and business impact. This month emphasized deterministic emulator timing and debugger reliability to reduce timing flakiness and improve developer experience. Key outcomes include deterministic DMA signaling to enhance timing determinism and reliable interrupt-number detection for components like 'krondor', plus Step Over accuracy improvements for non-returning instructions, enabling precise debugging across complex instruction flows.
2 Commits • 2 Features
Feb 1, 2025February 2025 (OpenRakis/Spice86) monthly summary focusing on key accomplishments, features delivered, major bugs fixed, and business impact. This month emphasized deterministic emulator timing and debugger reliability to reduce timing flakiness and improve developer experience. Key outcomes include deterministic DMA signaling to enhance timing determinism and reliable interrupt-number detection for components like 'krondor', plus Step Over accuracy improvements for non-returning instructions, enabling precise debugging across complex instruction flows.
February 2025
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Quality Metrics
Correctness90.2%
Maintainability87.8%
Architecture85.0%
Performance83.8%
AI Usage23.8%
Skills & Technologies
Programming Languages
C#MarkdownXAMLXML
Technical Skills
AI AssistanceAnimationsAsyncRelayCommandAsynchronous ProgrammingAttached BehaviorsAttached PropertiesAvaloniaAvalonia UIBackend DevelopmentBug FixingC#CPU ArchitectureCode AnalysisCode CleanupCode Navigation
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