NESFab – Programming language for making NES games
This is a long-running personal project I've had to write an optimizing compiler from scratch. Everything was done by me, including the lexer/parser, SSA-based IR, high-performance data structures, and code generator. Originally I wasn't targeting the NES. It started as a scripting language, then it morphed into a C++ replacement, and then finally I turned it into what it is today. The large scope of the project and colorful history means it's still a little rough around the edges, but it's now working well enough to post.
In plain words
NESFab is a programming language and compiler for creating games for the Nintendo Entertainment System. It features a custom-built optimizing compiler with lexer, parser, SSA-based intermediate representation, and code generator, all developed by a single creator. The language evolved from a scripting project into a specialized NES development tool. While still refining some rough edges from its complex development history, it is now functional enough for practical use in NES game creation.
written from the facts on this page · September 2026
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