CDC 160A

CDC 160A

The CDC 160 and CDC 160-A were 12-bit minicomputers built by Control Data Corporation from the late 1950s, through the mid-1960s. The 160 was designed by Seymour Cray - reportedly over a long three-day weekendFact|date=January 2008. It fit into the desk where its operator sat.

The 160 architecture was modified to become the basis of the "peripheral processors" (PPs) in the CDC 6000 series mainframe computers. Large parts of the 160 instruction set were unchanged in the peripheral processors. However there were changes to incorporate the 6000 data channel programming, and control of the "central processor". In the early days of the 6000s, almost the entire operating system ran in the PPs. This left the central processor unemcumbered by operating system demands and available for user programs.

The 160 architecture used ones' complement arithmetic with end-around carry. [ [http://www.cs.uiowa.edu/~jones/cdc160/man/index.html "A Programmer's Reference Manual for the CDC-160"] by Douglas W. Jones]

NCR joint marketed the 160-A under its own name for several years in the 1960s.

External links

* [http://archive.computerhistory.org/resources/text/CDC/CDC.160A.1962.102646114.pdf Control Data 160-A Overview]


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