Sto stack control system for multi-virtual memory in a data...

Details Sto stack control system for multi-virtual memory in a data... Sto stack control system for multi-virtual memory in a data...

Category

G - Physics

Subcategory

06

Subsubcategory

F

CPC

354/237

IPC codes

G06F 13/00 (2006.01) G06F 12/10 (2006.01)

Type

Patent

Patent number

CA 1193028

Description

STO STACK CONTROL SYSTEM FOR MULTI-VIRTUAL MEMORY IN A DATA PROCESSING SYSTEM ABSTRACT OF THE DISCLOSURE A STO stack control system employed in a data process- ing system which enables dynamic access over a plurality of virtual spaces, and in which the STO stack is retrieved depending upon the contents of a plurality of control registers which specify virtual spaces. In this system, when the contents of a given control register are changed to register a new STO identifier (STO?ID) in the STO stack and when it becomes necessary to erase the registration of an old STO?ID due to restriction of the number of ways of the STO stack, the old STO?ID is not erased in case the registration thereof is effected on the basis of the virtual space that corresponds to the contents of other control register but, instead, the old STO?ID registered on the basis of the space corresponding to the control register whose contents are changed, is erased.

Application Number

412068

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