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A talk from RubyConfTH, held in Bangkok, Thailand on December 9-10, 2022. Find out more and register for updates for our 2023 conference at https://rubyconfth.com/ RubyConfTH 2022 videos are presented by Cloud 66. https://cloud66.com
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The video titled "Megaruby - mruby/c on Sega Mega Drive" features a presentation by Yuji Yokoo at RubyConfTH 2022, discussing the development of games using MRuby and SGDK on the Sega Mega Drive. The presentation is structured as follows: - **Introduction to the Mega Drive**: Yokoo explains that the Mega Drive, also known as Sega Genesis, was released in 1988 and features a Motorola 68,000 CPU. It became popular with over 30 million units sold, particularly outside Japan. - **Overview of MRuby**: MRuby is a lightweight implementation of the Ruby programming language that is designed for embedded environments. Yokoo contrasts MRuby with other implementations like CRuby, emphasizing its integration with C and properties that make it suitable for constrained environments. - **The Significance of Developing for Mega Drive in 2022**: The speaker highlights the relevance of developing for the Mega Drive today due to the availability of open-source development kits like SGDK, the abundance of compatible hardware, active indie development, and the presence of good emulators. - **Why Use MRuby on Mega Drive?**: Yokoo argues that using MRuby allows developers to write game logic in Ruby while still leveraging C for platform-specific calls, making it a compelling option despite the constraints of the hardware. - **Introduction to SGDK**: SGDK (Sega Genesis Development Kit) helps streamline the development process by providing a C API for memory and graphics management, thereby avoiding more complex assembly coding. - **Technical Challenges and Solutions**: The presentation covers the memory limitations of Mega Drive, which has only 64KB of RAM. Yokoo shares strategies he implemented to overcome these issues, such as pre-rendering text into images to optimize memory usage. - **Graphics Handling on Mega Drive**: He discusses the Mega Drive's video display mechanics, explaining how graphics are tile-based and operate with limited color palettes. - **Development Insights**: Yokoo walks through the process of compiling resources and generating executable files for the Mega Drive, demonstrating the code organization and function declarations he utilized in Ruby. - **Demonstration**: The presentation includes a live demo of a simple game that showcases the scrolling capabilities of the graphics system, illustrating the game's mechanics and visual aspects. - **Future Goals**: Yokoo expresses his ambitions to create more games and enhance the tools available for MRuby/C development going forward. - **Conclusion**: He thanks his peers in the MRuby and SGDK communities for their contributions, recognizing the importance of their tools in his development work.
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