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:
May. 25, 1993
Filed:
May. 30, 1990
Hitachi, Ltd., Tokyo, JP;
Abstract
A multiprocessor having a plurality of processor elements connected in a cascaded manner. A memory is shared between each processor element and a processor adjacent in an upper or lower rank to the processor. In the lower processor element, there are disposed an arbiter for arbitrating a memory access with its upper processor element and a bus selector for switching a bus with the arbiter. The processor elements are connected in a multistage tree structure by a bus connection only. From the upper processor element, therefore, there can be accessed the shared memory in the lower processor element only through an external bus. The whole system is not limited by the address space of each processor and the bus, even if the address space is finite, so that the real memory capacity can be limitlessly expanded in a manner to correspond to the internal memory of each processor element.