This repository contains a port of the "Ritchie C compiler" to the TI990 series processors, in particular the 9995 and 99105 chips. The port is currently fairly complete; only floating point operations remain unported. Other tool chain components (assembler, linker, etc.) are also provided.

The long term goal is to run ancient unix on these chips. As a first stepping stone on that journey, a port of the original 1983 version of the Xinu system has already been completed. The source for that is also in this repository.

Announced on TUHS mailing list https://www.tuhs.org/pipermail/tuhs/2021-February/023225.html

Early Unix history, with comments by Ken Thompson, Dennis Ritchie, Brian Kernighan, Doug McIlroy and A.G. "Sandy" Fraser
On 2022-08-05, this page no longer exists at the URL http://www.princeton.edu/~mike/expotape.htm, but on https://www.princeton.edu/~hos/Mahoney/expotape.htm