// Open-source · TI-84+ CE

Internet. TLS.
On a calculator.

CagsCalcLabs builds real systems software for constrained hardware — a full TCP/IP stack, TLS 1.3, cryptographic libraries, and more. All open source, all for the TI‑84+ CE.

View lwIP-CE → All Projects

TI-84+ CE  ·  ez80 @ 48 MHz  ·  ~60 KB RAM  ·  USB Ethernet

9 Open-source repos
41 GitHub stars
4 Forks
7+ Years of CE work
Featured project

The leading reason for my lack of sanity.

What we build

Real software, real constraints.

Every project targets a platform with 48 MHz, ~60 KB RAM, and an ez80 processor. The constraints are real. So is the software.

Networking

TCP/IP, DNS, HTTP/S, WebSockets — full internet on hardware that was never designed for it.

Cryptography

TLS 1.3, AES-128-GCM, SHA-256, X25519 ECDHE — NIST-validated primitives built for a 48 MHz CPU.

Infrastructure

Game servers, mirrors, and custom APIs purpose-built for calculator software ecosystems.

Open Source

Every line is public from day one. Transparent, reproducible, and community-driven.

More projects

Other work.

CryptX preview
CryptX

A full-function cryptographic library for the TI-84+ CE allowing developers to implement NIST standards for encryption into their programs.

released 14 View →
Discord-CE preview
Discord-CE

A Discord client for the TI-84+ CE calculator, enabling real-time messaging over the Discord API via lwIP-CE.

wip 0 View →
Blast File Integrity Software preview
Blast File Integrity Software

Utility that validates hashes of programs, appvars and the operating system of the TI-84+ CE. Also checks the aforementioned for malware based on community-sourced malware definitions.

released 0 View →
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Got an idea?

Have a program you'd like to see on the TI‑84+ CE? Head to the Contribute page and get in touch.

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