Browse Prior Art Database

Simultaneous Main Storage Access for a Multiprocessor

IP.com Disclosure Number: IPCOM000051148D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10

Publishing Venue

IBM

Related People

Authors:
Cetina, MC Partridge, RL Sager, AR [+details]

Abstract

In a tightly coupled multiprocessing system, all processors, including the processing capability associated with the channels, share a common main storage. This single main storage may be implemented such that it is comprised of multiple, independently accessible, storage units. The communication between the processors and storage units might be via a common bus or multiple point to point connections, as shown in Figs. 1A and 1B, which each show a multiprocessor having four processors and two storage units. Each processor can be either a CPU or a channel processor. The common bus approach provides a less complex, less costly implementation but is limited to one data transfer at any one time.