Cached at:
08/15/26, 03:38 PM
# T3X.ORG t3x/0/index
Source: [https://t3x.org/t3x/0/index.html](https://t3x.org/t3x/0/index.html)
---
## A Minimal Procedural Language
\[[Download](https://t3x.org/t3x/0/index.html#dl)\|[Book](https://t3x.org/t3x/0/book.html)\|[Reference](https://t3x.org/t3x/0/t3xref.html)\]
T3X/0 is a small, portable, procedural, block\-structured, recursive, and almost typeless programming language, and the latest member of the T3X family of languages\. Its compiler is[freely available](https://t3x.org/t3x/0/index.html#dl)\([0BSD license](https://t3x.org/t3x/0/0bsd.html)or public domain\)\. T3X/0 syntax is similar to Pascal, its semantics resembles BCPL's\. Here is a[T3X/0 language cheat sheet](https://t3x.org/t3x/0/cheatsheet.pdf)\(PDF\)\.
[](https://t3x.org/t3x/0/noe.png)The T3X/0 package provides two editors \(one VI\-compatible, one WordStar\-compatible\) with built\-in compiler support\. Compile your programs by literally pressing three keys\. In case of an error the editors jump to the error\. This works even on CP/M\!
T3X/0 is used as a teaching language in the books
[Write Your Own Retro Compiler](https://t3x.org/t3x/0/book.html)and[Write Your Own Programs](https://t3x.org/wyop/index.html)It is formally defined in the book[The T3X Programming Language \- Formal Definition](https://t3x.org/t3x/0/formal.html)\.
Here is the simplest "Hello World" program in T3X/0:
```
USE t3x: t;
DO t.write(T3X.SYSOUT, "Hello, World!\r\n", 15); END
```
\(Of course this program cuts some corners, so here are some[more correct versions](https://t3x.org/t3x/0/hello.html)\.\)
Here are some more interesting programs written in T3X/0:
[Simple Examples](https://t3x.org/t3x/0/exam-sort.html)[More \(or Less\) Serious Programs](https://t3x.org/t3x/0/programs.html)If you want to learn more about the T3X/0 language, here is
[A Very Short T3X/0 Summary](https://t3x.org/t3x/0/summary.html)[The T3X/0 Language Reference](https://t3x.org/t3x/0/t3xref.html)[A T3X/0 online compiler](https://t3x.org/t3x/demo/index.html)T3X/0 currently runs on
- Unix \(386, x86\_64, ARMv6, ARMv7\)
- FreeBSD\-386 \(static code backend, LIBC not needed\)
- macOS\-686
- \{PC,MS,DR,etc\}\-DOS 2\.0 and later
- CP/M 2\.2 \(Z80 only\)
- The TCVM \(Tcode Virtual Machine\)
It is self\-hosting on all supported platforms and can cross\-compile to all supported 16\-bit platforms\.
[More details on supported systems](https://t3x.org/t3x/0/systems.html)[Some compiler statistics](https://t3x.org/t3x/0/stats.html)### Download the Compiler
[t3x0\-47\.zip](https://t3x.org/t3x/0/t3x0-47.zip)\(current version, ~350KB\)This is the full source code to the compiler \(in T3X/0\) and the runtime libraries \(in Z80, 8086, and 386 assembly language, and in C\)\. The archive also contains an implementation of the Tcode Virtual Machine in C, a TCVM binary for DOS, additional libraries, example programs, two editors with built\-in compiler support \("IDEs"\), documentation, and pre\-compiled compiler binaries for CP/M, DOS, FreeBSD, and the Tcode machine\.[What's new](https://t3x.org/t3x/0/news.html)since the book version?[t3x0\-12\.zip](https://t3x.org/t3x/0/t3x0-12.zip)\(book version, ~200KB\)This is the same as above, but the version frozen at the time when the[book](https://t3x.org/t3x/0/book.html)was published\.[t3x0dos\.zip](https://t3x.org/t3x/0/t3x0dos.zip)\(DOS binaries, ~100KB\)A pre\-compiled T3X/0 compiler for DOS, including all libraries in DOS text format, the T3X/0 Reference Manual, example programs, the NOE and VEE editors \(including their source code\), and a configuration utility for patching the compiler so that it can be installed in a directory of your choice\.[t3x0cpm\.zip](https://t3x.org/t3x/0/t3x0cpm.zip)\(CP/M binaries, ~310KB\)A pre\-compiled T3X/0 compiler for CP/M, including all libraries in CP/M text format, the T3X/0 Reference Manual, example programs, the NOE and VEE editors \(including their source code\), and a utility for patching the compiler so that it can be installed on a disk drive of your choice\.
**Warning:**ZIP file extracts into the working directory, because CP/M has no directories\. The ZIP file is uncompressed, so it[should extract under CP/M](https://github.com/agn453/UNZIP-CPM-Z80)\.[t3x0agon\.zip](https://t3x.org/t3x/0/t3x0agon.zip)\(CP/M disk image for the Agon Light 2, ~110KB\)An 8MB CP/M hard disk image containing all files of t3x0cpm\.zip, above\. Intended to be installed on an Agon Light 2 computer running CP/M\.
---