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Method of Supporting an Increase in the Number of Address Spaces for the IBM Series/1 Computer System Disclosure Number: IPCOM000061637D
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09

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Kurtz, HL Pipitone, RM Wyatt, VD [+details]


A technique is described whereby address space, as used in the IBM Series/1 (S/1) computer architecture, is increased from its limitation of eight address spaces, so as to make provision for extending the address capability of the S/1. The S/1 architecture is limited to utilizing a four-bit address space key to specify system address spaces. Each of the spaces is 64 kilobytes in size. Since S/1 is a 16-bit word system, the total system logic address is sixteen 64K-byte spaces or one megabyte. This concept provides a method of supporting more address spaces.