The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1981
Filed:
Jan. 02, 1979
Jerry L Kindell, Glendale, AZ (US);
Richard T Flynn, Peoria, AZ (US);
Honeywell Information Systems Inc., Phoenix, AZ (US);
Abstract
In a microprogrammed data processing system in which the boundaries of the operands or data strings identified by the descriptors are not constrained to coincide with boundaries of the units of addressable memory space, i.e., words, the time required to retrieve, execute and store operands of a three descriptor instruction, wherein two descriptors define the memory address of the initial operands and the third descriptor defines the memory address of the resulting operand, can be reduced by prefetching the two words which include the boundaries of the operand (data string) identified by the third descriptor. After execution of the instruction, the boundary words of the resulting operand (data string) can have the rewrite data, that is the data of the boundary words which are not part of the resulting operand, and should therefore be retained and inserted in appropriate positions of the appropriate boundary word by a retrieval of the boundary words which do not interrupt the normal data processing sequence.