Segmented Addressing - History

History

The Burroughs Corporation B5000 computer was one of the first to implement segmentation, and "perhaps the first commercial computer to provide virtual memory" based on segmentation. The later B6500 computer also implemented segmentation; a version of its architecture is still in use today on the Unisys ClearPath Libra servers.

The GE-645 computer, a modification of the GE-635 with segmentation and paging support added, was designed in 1964 to support Multics.

The Intel iAPX 432, begun in 1975, attempted to implement a true segmented architecture with memory protection on a microprocessor.

Prime, Stratus, Apollo, IBM System/38, and IBM AS/400 computers use memory segmentation.

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