forth

• Sep 28, 2025 forth

  Exploring Itsy Forth

  This post summarizes my exploration of Itsy Forth, a compact Forth interpreter designed for study and experimentation. The project covers:

  • Understanding the core runtime helpers: getchar, outchar, docolon, dovar
  • Investigating the dictionary and how words are defined and executed
  • Observing interpreter architecture and flow, including colon-defined words and variable handling
  • Examining runtime operation characteristics and memory layout
  • Extracting instruction sequences using the provided Python tools

  Itsy Forth provides a minimal but complete environment to explore Forth concepts, assembler integration, and low-level runtime mechanics. This is intended for learners who want to see how a small interpreter handles execution and word definition from the ground up.

  The source code and further details are available on GitHub.