Information AboutUnicos |
| CATEGORIES ABOUT UNICOS | |
| unix variants | |
| system v | |
|
CX-OS was the original name given to what is now Unicos. This was a prototype system which ran on a Cray X-MP in 1984 before the Cray-2 port. It was used to demonstrate the feasibility of using Unix on a supercomputer system, prior to the availability of Cray-2 hardware. The operating system revamp was part of a larger movement inside Cray Research to modernize their corporate software: including rewriting their most important Fortran compiler in a higher-level language ( Pascal ) with more modern optimizations and vectorizations. As a migration path for existing COS customers wishing to transition to Unicos, a Guest Operating System capability was introduced into COS. The only guest operating system that was ever supported was Unicos. A COS batch job would be submitted to start up Unicos, which would then run as a subsystem under COS - using a subset of the systems CPUs, memory, and peripheral devices. The Unicos that ran under GOS was exactly the same as when it ran stand-alone - the difference was that the kernel would make certain low-level hardware requests through the COS GOS hook, rather than directly to the hardware. One of the sites that ran very early versions of Unicos was Bell Labs , where Unix pioneers including Dennis Ritchie ported parts of their Eight Edition Unix (including Stream I/O ) to Unicos. They also experimented with a guest facility within Unicos, allowing the stand-alone version of the OS to host itself. VARIANTS Cray have released several different OSs under the name Unicos, including:
EXTERNAL LINKS
|
|
|