Kernel Source Archive: CMU Mach

The Mach Microkernel was developed at Carnegie Mellon University between 1985 and 1994, and was one of the earliest microkernel projects to have been developed. The CMU Mach project resulted in a number of forks (including the Workplace OS, University of Utah's Mach 4, OSF Mach, MkLinux, and NEXTSTEP).

Mach is still in wide use today: XNU, the kernel at the heart of Mac OS X, is based upon NEXTSTEP's variant of Mach 2.5, updated with parts of Mach 3.0. Similarly, there are many systems running the OSF/1 and Tru64 UNIX operating systems, which were built around OSF Mach—another variant of Mach 2.5.

Three releases of CMU Mach 3.0 are available in the Kernel Source Archive Subversion repository: MK83, MK83a, and MK84. They can be found at /kernelsource/CMU-Mach-3.0.

• Browse CMU Mach 3.0 sources at Sourceforge
• Download CMU Mach 3.0 release packages from Sourceforge
• Read instructions on accessing Subversion
• Read more about Mach at Wikipedia
• Find out more about Mach 4 at the University of Utah