I'm 17 and I created a Forth interpreter for the TI-84+ calculator
https://github.com/siraben/ti84-forth Hi HN! For the past year I've been getting into programming in Z80 assembly (especially for the TI-84+). More recently I've been learning about the Forth programming language and after a lot of searching online (in vain) for a Forth interpreter for the TI-84, I decided to write one myself. It's been fun demoing this to others, because it's a very unexpected use of a calculator. It's my largest project to date, and I'm interested to know what the HN community thinks, please feel free to critique my code! -- Ben
I'm 17 and I created a Forth interpreter for the TI-84+ calculator launched on December 5, 2018 with 56 votes, #610 of 2,148 launches that month and more than 90% of that year's launches.
In plain words
This is a Forth interpreter written in Z80 assembly for the TI-84+ calculator. It allows users to write and run Forth programs on the graphing calculator, a language and platform combination not previously available. The project is aimed at programmers and calculator enthusiasts interested in low-level assembly programming and the Forth language. What stands out is that it brings an unexpected programming capability to a standard educational calculator through entirely custom implementation.
written from the facts on this page · September 2026
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