Digital data processing system using unique means for comparing

Details Digital data processing system using unique means for comparing Digital data processing system using unique means for comparing

1981-05-22

1985-01-08

Atkinson, Charles E.

Boots, shoes, and leggings

364749, G06F 1300

Patent

active

044930259

ABSTRACT:
A data processing system having a flexible internal structure, protected from and effectively invisible to users, with multilevel control and stack mechanisms and capability of performing multiple, concurrent operations, and providing a flexible, simplified interface to users. Addressing mechanisms allow permanent, unique identification of information and an extremely large address space accessible and common to all such systems. Addresses are independent of system physical configuration and includes length field information specifying the number of data bits at the addressed location. In accordance with the invention as used in such system, the processor includes arithmetic logic (ALU) means for performing operations on operands. The number of bits in the results of such operations are compared with the number of bits specified by the length field of an address of the location to which the result can be transferred to indicate when such numbers of bits are not equal.

REFERENCES:
patent: 3539790 (1970-11-01), Shimabukuro
patent: 3569685 (1971-03-01), Chesley
patent: 4021655 (1977-05-01), Healey et al.
patent: 4161784 (1979-07-01), Cushing et al.
patent: 4224677 (1980-09-01), Kindell et al.
patent: 4305134 (1981-12-01), Joyce et al.

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