System for addressing a very large memory with real or virtual a

Details System for addressing a very large memory with real or virtual a System for addressing a very large memory with real or virtual a

1991-09-04

1995-06-06

Gossage, Glenn

Boots, shoes, and leggings

395425, 364DIG1, G06F 1210, G06F 1208, G06F 1206

Patent

active

054230136

ABSTRACT:
Allows instructions and data to be located in any one or more of plural sections of a large-size real memory of a data processing system. Any memory section is located by concatenating a conventional small real/absolute address with an address extender used with conventional small-size memory. A Central Processor Extended Address Mode (CPEAM) register content indicates the location of extenders in an AR(s), ASTE(s), STE(s) or PTE(s) for use by a central processor or I/O operations. An Input-Output Extended Address Mode (IOEAM) register content indicates the location of the extenders in ORB(s), CCW(s) or IDAW(s) for use by I/O operations. A compatible mode sets the content to zero for either or both of the CPEAM and IOEAM if either or both is not to be used.

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