Information AboutUnicos |
| CATEGORIES ABOUT UNICOS | |
| unix variants | |
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CX-OS was the original name given to what is now Unicos. CX-OS 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. VARIANTS Cray have released several different OSs under the name Unicos, including:
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