G - Physics – 06 – F
Patent
G - Physics
06
F
354/243
G06F 12/02 (2006.01) G06F 13/00 (2006.01)
Patent
CA 1081859
KEY CONTROLLED ADDRESS RELOCATION TRANSLATION SYSTEM ABSTRACT Translates each active address key (AAK) into a respective address- ability in physical main memory. Each addressability comprises one or more physical blocks which may be scattered in the main memory. Address keys are contained in plural key register sections, and AAK select circuits outgate to the translator each M K from a key register section corresponding to the access type for each storage access request currently received from a processor or I/O channel. Each address key identifies a particular stack of one or more segmentation registers. Each segmentation register can be assigned the address of any segment (i.e. a block of contiguous physical addresses located anywhere in the main memory). Each segmentation register also has validity and read-only flag bits for its assigned block. Each stack can translate a contiguous set of logical program addres- ses into physical addresses. Any stack can support all logical addresses apparent to a program, although the machine can cause a single program to access plural addressabilities due to the machine assignment of address keys. For each storage access request for a logical program address, a stack is addressed by the AAK to determine an addressability. Then a register in the stack is addressed by high-order bits in the logical program address. The addressed register outputs the translated block address. The main memory can have any physical size in relation to the number of stacks, and to the number of segmentation registers in each stack.
275573
Birney Richard E.
Davis Michael I.
Graybiel Lynn A.
Hood Robert A.
Kahn Samuel
International Business Machines Corporation
Na
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