Alternatives
Products that do what TI-59C Web Simulator does
A premium, pixel-perfect web tribute to the legendary TI-59
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2021 · mkhan45.github.io
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2017 · insect.sh
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2022 · calc-o-pad.thejunkland.com
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2015 · github.com
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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
2018
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The core question: how did HP's scientific calculators actually work at the gate level? That rabbit hole led to building one from scratch. The architectural decision everything else follows from: a decimal calculator should store numbers as BCD — one decimal digit per 4-bit nibble. A standard byte-oriented CPU (Z80, 6502) fights that layout constantly. So I designed a small custom CPU in Verilog where 4 bits is the natural data width and memory is nibble addressable. What the project covers: - Custom CPU: Harvard architecture, 12-bit ISA, 8-state execution FSM, hardware stack guard with a…
May 2026 · github.com
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I built a browser-based TI-84 calculator that works without installation or login. It's useful for students who don’t have the physical calculator or just need a quick way to check something. Would love feedback or suggestions!
2025 · ti84-online.com
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2015 · github.com
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Recently, I found a long desired framework that treats the terminal via a DOM/CSS approach named Textual [https://textual.textualize.io]. In order to explore this framework I started developing a terminal based TUI RPN (styled in the aesthetic of a classic HP 15C pocket) calculator. So far this TUI RPN calculator has classic HP styled buttons, LCD display and some of the basic math operations. This is very much a W.I.P. Any engagement welcome.
2024 · github.com
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Mar 2026 · github.com
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A browser based iOS calculator clone, written in Rust, compiled to WebAssembly. Repository: https://github.com/alexdgourlay/wasm-ios-calc/
2023 · wasm-ios-calc.netlify.app
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