CE C/C++ Toolchain: building native programs for TI-84 Plus CE

One calculator family, one CPU family

The scope here is narrow and deliberate. The repository describes itself as a toolchain and libraries for C/C++ programming on the TI-84 Plus CE calculator series, and the stated purpose is to build programs in C/C++ natively for that series. The topic tags add the TI-83 Premium CE to the family, along with the eZ80 identifier and the general terms sdk and toolchain.

That eZ80 reference is more than a keyword, because it tells you what a piece of the toolchain is aimed at. The support channels are named after it: the community chat is the `ez80-dev` channel on the CE Programming Discord server, and the same channel is bridged to EFNet over IRC. When you read support discussions or examples, you are reading about programming one particular embedded architecture with a very different memory map from a desktop, and the examples in this repository reflect that.

The native part is the interesting constraint. Programs are not interpreted by some on-calculator runtime the way many third-party calculator languages work. The compiler emits machine code for the calculator's own processor, which is what makes the resulting programs fast on the device and also what makes the toolchain sensitive to the hardware model you are targeting.

The repository is a build tree, not a document

The top level of the repository reads like a software project rather than a guide. There is a `makefile` at the root, and directories named `src`, `tools`, `resources`, `docs`, `test` and `examples`, plus a `changelog.md` and a `license` file with no extension. A `.gitmodules` file indicates that parts of the tree come in as submodules, which is typical for a project that vendors other components into its own build.

Two smaller details say something about how the project is worked on. There is a `.git-blame-ignore-revs` file, which is the convention for recording bulk reformatting commits so that `git blame` stays useful, so the codebase is kept formatted and the history is preserved through those bulk changes. And the `.github` directory holds the workflow definitions, including the build status badge in the readme, which is reported per platform for Win, Mac and Linux on a branch named `llvm`.

That branch name is the one piece of internal detail worth flagging. The default branch of the repository is `master`, while the build badge tracks `llvm`, so the continuous build you see at the top of the readme may not be testing the branch you get when you clone. If you are tracking the toolchain closely, that is worth checking before you file a bug against the wrong tree.

The examples directory is the real documentation

The examples carry the teaching load, and they are organised to show three different things. Under `examples` there is `hello_world`, `library_examples`, `standalone_examples` and a `makefile`.

The three example groups map onto three questions a newcomer has. `hello_world` is the smallest program that proves the chain works, from source through the build system to something that runs on the calculator. `standalone_examples` covers programs that do not depend on the toolchain's own libraries. `library_examples` covers programs that use them, which is where you learn what the libraries in the repository actually give you.

The presence of a `makefile` inside `examples` alongside the root `makefile` tells you that the build is invoked through make at both levels, with the example makefile handling a program and the root one handling the toolchain itself. That is the fastest way to learn the layout: read the example makefile to see which targets exist, then use `hello_world` to confirm that the toolchain builds and produces something the calculator will run.

Nothing in the repository documents the command line interface of the compiler or assembler, the memory map, or the flashing procedure. That detail is in the documentation site, which the readme points to as the place hosting all the information for working with the toolchain.

Documentation lives on a GitHub Pages site

The Getting Started section of the readme is two sentences and one link: visit the CE Toolchain documentation at ce-programming.github.io/toolchain, which the readme says hosts all the information for working with the toolchain. Contributing and building the toolchain itself is documented on a separate page of the same site, at the contributing path under the static directory.

This arrangement is common for small open source projects with a volunteer audience: the repository holds code, and a site holds the manuals that would otherwise clutter it. The consequence for an engineer evaluating the toolchain is that you cannot judge it from the repository alone. The site is where the install steps, the editor integration, the linker and assembler options and the transfer-to-calculator workflow are described, and those pages are outside what the repository itself records.

The repository does keep a `docs` directory at the top level, so some documentation lives in the tree as well. The split between the two locations is not described anywhere in the readme, so expect to move between them.

Support runs through Discord with an IRC bridge

The help channels are the clearest sign of the community's shape. The primary one is the `CE Programming` Discord server, in the `#ez80-dev` channel. The same channel is bridged to the EFNet `#ez80-dev` IRC channel, and the readme notes that you can use a web client such as IRCCloud if you would rather not install a local IRC application.

The readme is careful about expectations here. Depending on how active the channel is, you might not get a response. The stated fallback is to post a question in the GitHub discussions area of the repository or in the issue tracker, where the project says you will get a reply as soon as possible.

That fallback matters more than it might seem for a hardware toolchain, because the questions that matter are often about a specific calculator model, a specific assembler behaviour, or a build that fails on one machine and not another. Those land well in a written issue where they stay searchable, and badly in a chat channel that scrolls. If you are writing the toolchain yourself, keeping your build notes and the exact error output in an issue is more useful to the next person than a chat log.

LGPL-3.0 terms and a v15 toolchain

The project is licensed LGPL-3.0, with the licence text in a `license` file at the root of the repository. For a toolchain that produces binaries rather than a library you link into your own product, that distinction is mostly academic: the obligation that matters for LGPL code is about relinking, which applies when you modify and redistribute a library, and a compiler that emits machine code does not travel with your program in the way a shared object does. Anyone shipping a modified toolchain itself should still read the licence file and the `changelog.md` before distributing it.

On cadence, the release list shows v14.1 on 2026-01-07, v14.2 on 2026-01-18 and v15.0 on 2026-05-02. The last push was on 2026-10-06, so work has continued on the default branch `master` for about five months after the v15.0 tag without a new version. The repository is not archived, and the release names are plain version numbers, which makes the changelog the place to look for what changed.

There is a `test` directory in the tree, and the build badge tracks Win, Mac and Linux on the `llvm` branch, so cross platform building is an explicit goal. Whether those CI runs produce artefacts you can install directly is not stated in the readme, and neither is the relationship between the tagged releases and the branch that the badge watches.

Editorial conclusion

The CE Programming toolchain suits a hobbyist or student who wants to write real C for a TI-84 Plus CE and is willing to work from a separate documentation site and an example tree rather than a self-contained guide. It is a poor fit for anyone who needs the whole workflow in one place, because the repository readme is a pointer rather than a manual. Before you start, read the documentation site, build the `hello_world` example under `examples/hello_world`, and check `changelog.md` against the v15.0 release date of 2026-05-02 to see how far the toolchain has moved since you last used it.

Frequently asked questions

Official sources

1. CE-Programming/toolchain on GitHub
2. License: LGPL-3.0
3. Project website
4. README
5. Releases