Building a Game Boy Emulator in OCaml: A Developer's Journey
2025-07-04
This article chronicles the development of CAMLBOY, a Game Boy emulator written in OCaml and running in the browser. The author details the architecture, interface design using functors and GADTs for testability and reusability, instruction set implementation, performance optimization, and JavaScript compilation. The process involved extensive use of test ROMs for integration testing and exploratory programming. The author also shares insights and reflections on the OCaml ecosystem and language features, highlighting both strengths and weaknesses.
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Development